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Reaper Group's Updated Mobile Arsenal ![Clock Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-clock.svg) 4 min read Related Products [![Advanced WildFire icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/strata_RGB_logo_Icon_Color.png)Advanced WildFire](https://unit42.paloaltonetworks.com/product-category/advanced-wildfire/ "Advanced WildFire")[![Cortex XDR icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/cortex_RGB_logo_Icon_Color.png)Cortex XDR](https://unit42.paloaltonetworks.com/product-category/cortex-xdr/ "Cortex XDR") * ![Profile Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-profile-grey.svg) By: * [Ruchna Nigam](https://unit42.paloaltonetworks.com/author/ruchna-nigam/) * ![Published Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-calendar-grey.svg) Published:April 5, 2018 * ![Tags Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-category.svg) Categories: * [Malware](https://unit42.paloaltonetworks.com/category/malware/) * [Nation-State Cyberattacks](https://unit42.paloaltonetworks.com/category/nation-state-cyberattacks/) * [Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) * ![Tags Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-tags-grey.svg) Tags: * [Android](https://unit42.paloaltonetworks.com/tag/android/) * [APT37](https://unit42.paloaltonetworks.com/tag/apt37/) * [Group 123](https://unit42.paloaltonetworks.com/tag/group-123/) * [KevDroid](https://unit42.paloaltonetworks.com/tag/kevdroid/) * [Reaper](https://unit42.paloaltonetworks.com/tag/reaper/) * [Red Eyes](https://unit42.paloaltonetworks.com/tag/red-eyes/) * [ScarCruft](https://unit42.paloaltonetworks.com/tag/scarcruft/) * [![Download Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-download.svg)](https://unit42.paloaltonetworks.com/unit42-reaper-groups-updated-mobile-arsenal/?pdf=download&lg=en&_wpnonce=1628116e08 "Click here to download") * [![Print Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-print.svg)](https://unit42.paloaltonetworks.com/unit42-reaper-groups-updated-mobile-arsenal/?pdf=print&lg=en&_wpnonce=1628116e08 "Click here to print") Share![Down arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/down-arrow.svg) * ![Link Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-share-link.svg) * [![Link Email](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-sms.svg)](mailto:?subject=Reaper%20Group’s%20Updated%20Mobile%20Arsenal&body=Check%20out%20this%20article%20https%3A%2F%2Funit42.paloaltonetworks.com%2Funit42-reaper-groups-updated-mobile-arsenal%2F "Share in email") * [![Facebook Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-fb-share.svg)](https://www.facebook.com/sharer/sharer.php?u=https%3A%2F%2Funit42.paloaltonetworks.com%2Funit42-reaper-groups-updated-mobile-arsenal%2F "Share in Facebook") * [![LinkedIn Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-linkedin-share.svg)](https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Funit42.paloaltonetworks.com%2Funit42-reaper-groups-updated-mobile-arsenal%2F&title=Reaper%20Group’s%20Updated%20Mobile%20Arsenal "Share in LinkedIn") * [![Twitter Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-twitter-share.svg)](https://twitter.com/intent/tweet?url=https%3A%2F%2Funit42.paloaltonetworks.com%2Funit42-reaper-groups-updated-mobile-arsenal%2F&text=Reaper%20Group’s%20Updated%20Mobile%20Arsenal "Share in Twitter") * [![Reddit Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-reddit-share.svg)](https://www.paloaltonetworks.com//www.reddit.com/submit?url=https%3A%2F%2Funit42.paloaltonetworks.com%2Funit42-reaper-groups-updated-mobile-arsenal%2F&ts=markdown "Share in Reddit") * [![Mastodon Icon](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-mastodon-share.svg)](https://mastodon.social/share?text=Reaper%20Group’s%20Updated%20Mobile%20Arsenal%20https%3A%2F%2Funit42.paloaltonetworks.com%2Funit42-reaper-groups-updated-mobile-arsenal%2F "Share in Mastodon") Summary A recent post from [EST Security](https://blog.alyac.co.kr/1587) revealed the use of Android spyware in spear phishing email attachments linked to the North Korean [Reaper](https://www.fireeye.com/blog/threat-research/2018/02/apt37-overlooked-north-korean-actor.html) group (also known as APT37, Scarcruft, Group 123 or Red Eyes), highlighting a new mobile vector added to the threat group's toolkit. Unit 42 has looked further into EST's findings and found a more advanced variant of the Trojan mentioned in their original article. Talos has written on this variant and named it [KevDroid](https://blog.talosintelligence.com/2018/04/fake-av-investigation-unearths-kevdroid.html). This post provides our analysis of KevDroid., as well as details on the discovery of previously unknown trojanized versions of a Bitcoin Ticker Widget and a PyeongChang Winter Games application, that are downloaders for the spyware variants. Background The post by EST Security detailed an Android spyware disguising itself as an Anti-Virus app from Naver (the largest search and web portal service provider in South Korea). While hunting for similar samples, I came across two more versions of the same variant. One of those called home to cgalim\[.\]com, a domain that Palo Alto Networks had already observed being used by the Reaper group in non-mobile attacks (IOCs in Appendix). |------------------------|------------------------------------------------------------------------------------------------------|------------------------------------------------------------------| | App Name | Icon | SHA256 | | Google Defender Update | ![Google\_1](https://unit42.paloaltonetworks.com/wp-content/uploads/2018/04/Google_1.png) | 06222141a684de8a0b6e5dc1f7a2b14603c98dbe404ad7605dc9eb9d903c3df8 | | Update | ![Android\_reaper](https://unit42.paloaltonetworks.com/wp-content/uploads/2018/04/Android_reaper.png) | f33aedfe5ebc918f5489e1f8a9fe19b160f112726e7ac2687e429695723bca6a | *Table 1: Additional samples found for the original Android spyware variant linked to the Reaper group* Pivoting on artefacts from the original variant led to the discovery of a more advanced variant of the same spyware, which is described in detail further below. In addition, I also stumbled upon two Android applications that serve as downloaders for each of the two variants. They are discussed next. Downloaders While investigating the Reaper group's Android spyware variants, I found two applications that have the ability to download and install an application from hxxp://cgalim.com/admin/hr/1\[.\]apk. I also observed the same URL serving the advanced variant of the Android spyware, confirming that these two applications served as downloaders for the Reaper group's Android spyware. The two applications are trojanized versions of popular applications available on the Google Play Store. The two trojanized versions were not posted on Google Play. While both downloaders contacted the same URL to download their payloads, looking further into their code I found that they were each written to respectively download and drop one specific variant of Reaper's Android spyware. |--------------------------|------------------------------------------------------------------------------------------------|------------------------------------------------------------------|------------------| | App Name | Icon | SHA256 | DROPPED PAYLOAD | | PyeongChang Winter Games | ![Wintergames](https://unit42.paloaltonetworks.com/wp-content/uploads/2018/04/Wintergames.png) | 28c69801929f0472cef346880a295cdf4956023cd3d72a1b6e72238f5b033aca | New variant | | Bitcoin Ticker Widget | ![bitcoin](https://unit42.paloaltonetworks.com/wp-content/uploads/2018/04/bitcoin.png) | 679d6ad1dd6d1078300e24cf5dbd17efea1141b0a619ff08b6cc8ff94cfbb27e | Original variant | *Table 2: Android downloaders used to drop spyware variants linked to the Reaper group* Both applications are signed with the same certificate thereby confirming their origins from the same author(s) Owner: CN=Jhon Phalccon, OU=Google Chrome, O=Google Chrome, L=Washington, ST=US, C=US Issuer: CN=Jhon Phalccon, OU=Google Chrome, O=Google Chrome, L=Washington, ST=US, C=US Serial number: 7b320fab Valid from: Wed Jan 24 10:22:50 GMT 2018 until: Sun Jun 11 10:22:50 GMT 2045 |---------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | 1 2 3 4 | Owner: CN=Jhon Phalccon, OU=Google Chrome, O=Google Chrome, L=Washington, ST=US, C=US Issuer: CN=Jhon Phalccon, OU=Google Chrome, O=Google Chrome, L=Washington, ST=US, C=US Serial number: 7b320fab Valid from: Wed Jan 24 10:22:50 GMT 2018 until: Sun Jun 11 10:22:50 GMT 2045 | Once these downloaders are installed, they display a message prompting the user to update the application. If the user follows the prompts, the downloader retrieves the payload and saves it to the external device memory as *AppName.apk* . The payload is then loaded prompting the user again to confirm its installation before it is finally installed on the device. The next section provides an analysis of the newer, more advanced variant of these payloads. Advanced Variant Analysis The following sample was used for this analysis |----------|---------|------------------------------------------------------------------| | App Name | Icon | SHA256 | | PU | (Blank) | 990d278761f87274a427b348f09475f5da4f924aa80023bf8d2320d981fb3209 | *Table 3: New Android spyware variant discovered, linked to the Reaper group* This sample has the following abilities: * Record video (default duration is 10 mins) * Record audio (default duration is 5 mins, saved as *48\_d\[TS\].amr*) * Capture screenshots (saved as *96\_d\[TS\].jpg*) * Grab the phone's file listing (saved as *128\_d\[TS\].txt*) * Fetch specific files * Download a list of commands * Get device info - 64-bit Android ID, Phone number, [System Properties]() etc (saved as *208\_d\[TS\].json*) * Rooting the device, using a binary called *'poc'* in the package assets Additionally, this advanced variant is capable of exfiltrating: * Voice recordings from incoming and outgoing calls (saved as *\_p\[Ph\]_in_\[D\].amr* or *\_p\[Ph\]_out_\[D\].amr*) * Call logs (saved as *16\_d\[TS\].json)* * SMS history (saved as *32\_d\[TS\].json)* * Contact lists (saved as *144\_d\[TS\].json)* * Information on registered accounts on the phone (saved as *160\_d\[TS\].json)*, In each of these cases, *\[TS\]* is the current timestamp in the format yyyyMMddkkmmss, *\[Ph\]* is the source or destination phone number for a call, and *\[D\]* is the call duration. While these exfiltration capabilities are shared in common with the original variant, this new variant writes its own call recording library as opposed to using the [open source library](https://github.com/aykuttasil/CallRecorder) that was used by its predecessor. All exfiltrated information is written to the directory /sdcard/\_pu on the phone and sent to hxxp://hakproperty.com/new/plat/pu\[.\]php?do=upload. Before transmission, the files are AES-encrypted using the key "08D03B0B6BE7FBCD". This encryption scheme and key is consistent across the two variants. Post-encryption the files are renamed with the addition of a suffix *'x'* . All created files are deleted after they are sent to the upload server. When commanded to fetch a list of commands, the list is fetched from hxxp://hakproperty.com/new/plat/pu\[.\]php?do=download\_rc\&aid=" + \[64-bit android\_id\] |---|------------------------------------------------------------------------------------------| | 1 | hxxp://hakproperty.com/new/plat/pu\[.\]php?do=download\_rc\&aid=" + \[64-bit android\_id\] | Conclusion The emergence of a new attack vector, followed by the appearance of new variants disguising themselves as currently relevant applications like the Winter Olympics, indicates expanding operations of the Reaper group that are actively in development. Palo Alto Networks customers benefit from the following protections against these attacks: 1. AutoFocus customers can track the group's activity using the [Reaper](https://autofocus.paloaltonetworks.com/#/tag/Unit42.Reaper) tag. 2. WildFire detects all related samples with malicious verdicts. 3. Traps blocks all malicious files associated with this group. IOCs |------------------------------------------------------------------| | Reaper Downloader APK samples | | 28c69801929f0472cef346880a295cdf4956023cd3d72a1b6e72238f5b033aca | | 679d6ad1dd6d1078300e24cf5dbd17efea1141b0a619ff08b6cc8ff94cfbb27e | |------------------------------------------------------------------| | Advanced Variant sample | | 990d278761f87274a427b348f09475f5da4f924aa80023bf8d2320d981fb3209 | |------------------------------------------------------------------| | **Non-APK Reaper-related samples making use of cgalim\[.\]com** | | 0de087ffb95c88a65e83bd99631d73d0176220e8b740785de78d2d79294f2303 | | 6b1f2dfe805fa0e27139c5a4840042599262dbbf4511a118d3fba3d4ec35f2d7 | | 86887ce368d9a3e7fdf9aa62418cd68daeea62269d17afb059ab64201047e378 | | d29895aa3f515ec9e345b05882ee02033f75745b15348030803f82372e83277a | | d5de09cc5d395919d2d2000f79326a6997f4ec079879b11b05c4d1a1a847ed00 | Back to top ### Tags * [Android](https://unit42.paloaltonetworks.com/tag/android/ "Android") * [APT37](https://unit42.paloaltonetworks.com/tag/apt37/ "APT37") * [Group 123](https://unit42.paloaltonetworks.com/tag/group-123/ "Group 123") * [KevDroid](https://unit42.paloaltonetworks.com/tag/kevdroid/ "KevDroid") * [Reaper](https://unit42.paloaltonetworks.com/tag/reaper/ "Reaper") * [Red Eyes](https://unit42.paloaltonetworks.com/tag/red-eyes/ "Red Eyes") * [ScarCruft](https://unit42.paloaltonetworks.com/tag/scarcruft/ "ScarCruft") [Threat Research Center](https://unit42.paloaltonetworks.com "Threat Research") [Next: Smoking Out the Rarog Cryptocurrency Mining Trojan](https://unit42.paloaltonetworks.com/unit42-smoking-rarog-mining-trojan/ "Smoking Out the Rarog Cryptocurrency Mining Trojan") ### Related Articles * [LANDFALL: New Commercial-Grade Android Spyware in Exploit Chain Targeting Samsung Devices](https://unit42.paloaltonetworks.com/landfall-is-new-commercial-grade-android-spyware/ "article - table of contents") * [Beware of BadPack: One Weird Trick Being Used Against Android Devices](https://unit42.paloaltonetworks.com/apk-badpack-malware-tampered-headers/ "article - table of contents") * [Leveraging a Hooking Framework to Expand Malware Detection Coverage on the Android Platform](https://unit42.paloaltonetworks.com/hooking-framework-in-sandbox-to-analyze-android-apk/ "article - table of contents") ## Related Resources ![Pictorial representation of a magnifying glass illuminating a glowing orange circular digital circuit interface on a dark, high-tech background.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/09/04_Myth-Busting_Overview_1920x900-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2025/08/Insights-icon-white.svg)Insights](https://unit42.paloaltonetworks.com/category/insights/) September 16, 2026 [#### Atomic macOS (AMOS) Stealer Activity](https://unit42.paloaltonetworks.com/atomic-macos-amos-stealer-activity/) * [MacOS](https://unit42.paloaltonetworks.com/tag/macos/ "macOS") * [Threat intelligence](https://unit42.paloaltonetworks.com/tag/threat-intelligence/ "threat intelligence") * [Unit 42](https://unit42.paloaltonetworks.com/tag/unit-42/ "Unit 42") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/atomic-macos-amos-stealer-activity/ "Atomic macOS (AMOS) Stealer Activity") ![Pictorial representation of post-exploitation identity misuse in SPIFFE/SPIRE. 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A vibrant cityscape with silhouettes of numerous people walking along a bustling street. The scene is illuminated by bright urban lights and digital-like particles, creating a dynamic and futuristic atmosphere.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/09/AdobeStock_768915868-2-1-786x373.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) September 3, 2026 [#### Attackers Expose Ongoing AI Tool Use Targeting Organizations in Latin America](https://unit42.paloaltonetworks.com/ai-tool-use-targeting-latam-orgs/) * [Agentic AI](https://unit42.paloaltonetworks.com/tag/agentic-ai/ "Agentic AI") * [ChatGPT](https://unit42.paloaltonetworks.com/tag/chatgpt/ "ChatGPT") * [CL-CRI-1131](https://unit42.paloaltonetworks.com/tag/cl-cri-1131/ "CL-CRI-1131") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/ai-tool-use-targeting-latam-orgs/ "Attackers Expose Ongoing AI Tool Use Targeting Organizations in Latin America") ![Pictorial representation of vishing campaigns in Microsoft Teams. A digital image of a skull formed by blue binary code on a black background, with scattered ones and zeros and digital noise, symbolizes how stealthy prompt injection attacks can exploit AI logic to bypass security controls.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/08/01_Malware_Category_1920x900-5-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) August 31, 2026 [#### Spring Ring: An Inside Look at Voice Phishing Campaigns in Microsoft Teams](https://unit42.paloaltonetworks.com/spring-ring-voice-phishing-campaigns/) * [Cloaked Ursa](https://unit42.paloaltonetworks.com/tag/cloaked-ursa/ "Cloaked Ursa") * [Entra ID](https://unit42.paloaltonetworks.com/tag/entra-id/ "Entra ID") * [Microsoft Teams](https://unit42.paloaltonetworks.com/tag/microsoft-teams/ "Microsoft Teams") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/spring-ring-voice-phishing-campaigns/ "Spring Ring: An Inside Look at Voice Phishing Campaigns in Microsoft Teams") ![Pictorial representation of AI-enabled malware. A vibrant digital interface displaying various icons and graphs, resembling a futuristic network or data analysis dashboard. 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Close-up view of a digital screen displaying a glitched and pixelated image of a skull-like shape.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/08/02_Malware_Category_1920x900-2-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) August 20, 2026 [#### Identity Abuse Through Trusted Communication Channels](https://unit42.paloaltonetworks.com/communication-channel-identity-risks/) * [Authentication](https://unit42.paloaltonetworks.com/tag/authentication/ "authentication") * [Identity theft](https://unit42.paloaltonetworks.com/tag/identity-theft/ "identity theft") * [Malware](https://unit42.paloaltonetworks.com/tag/malware/ "malware") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/communication-channel-identity-risks/ "Identity Abuse Through Trusted Communication Channels") ![Pictorial representation of Kimwolf botnet malware family. Digital screen with a warning sign reading "Malware." The background features lines of computer code and graphics, creating a sense of cybersecurity threat.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/08/07_Malware_Category_1920x900-3-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) August 11, 2026 [#### Kimwolf v7: An Evolution of the Kimwolf Botnet](https://unit42.paloaltonetworks.com/kimwolf-v7-botnet-malware/) * [Android APK](https://unit42.paloaltonetworks.com/tag/android-apk/ "Android APK") * [Ethereum](https://unit42.paloaltonetworks.com/tag/ethereum/ "Ethereum") * [HTTP](https://unit42.paloaltonetworks.com/tag/http/ "HTTP") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/kimwolf-v7-botnet-malware/ "Kimwolf v7: An Evolution of the Kimwolf Botnet") ![Pictorial representatiom pf Aeternum's blockchain C2. A close-up of a computer circuit board with a central microchip is depicted. Red digital data streams in the form of glowing binary numbers and arrows appear to flow in and out of the chip. The scene is illuminated with a futuristic blue and red glow.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/08/04_Malware_Category_1920x900-4-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/06/icon-threat-research.svg)Threat Research](https://unit42.paloaltonetworks.com/category/threat-research/) August 10, 2026 [#### The Permanent Threat: Analyzing Aeternum's Blockchain-Based C2 Operations and Communications](https://unit42.paloaltonetworks.com/aeternum-blockchain-c2-analysis/) * [Aeternum](https://unit42.paloaltonetworks.com/tag/aeternum/ "Aeternum") * [Infection chain](https://unit42.paloaltonetworks.com/tag/infection-chain/ "infection chain") * [JSON](https://unit42.paloaltonetworks.com/tag/json/ "JSON") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/aeternum-blockchain-c2-analysis/ "The Permanent Threat: Analyzing Aeternum’s Blockchain-Based C2 Operations and Communications") ![Pictorial representation of ChainDrop, a self-propagating npm worm. An artistic depiction of a digital workspace featuring an open laptop with a red virus on the screen.](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/08/03_Malware_Category_1920x900-7-786x368.jpg) [![category icon](https://unit42.paloaltonetworks.com/wp-content/uploads/2024/07/top-threats.svg)High Profile Threats](https://unit42.paloaltonetworks.com/category/top-cyberthreats/) August 6, 2026 [#### ChainDrop: Inside a Self-Propagating npm Worm](https://unit42.paloaltonetworks.com/chaindrop-npm-worm-analysis/) * [Blockchain](https://unit42.paloaltonetworks.com/tag/blockchain/ "blockchain") * [ChainDrop](https://unit42.paloaltonetworks.com/tag/chaindrop/ "ChainDrop") * [Claude code](https://unit42.paloaltonetworks.com/tag/claude-code/ "Claude code") [Read now ![Right arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/icon-right-arrow-withtail.svg)](https://unit42.paloaltonetworks.com/chaindrop-npm-worm-analysis/ "ChainDrop: Inside a Self-Propagating npm Worm") * ![Slider arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/slider-arrow-left.svg) * ![Slider arrow](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/slider-arrow-left.svg) ![Close button](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/icons/close-modal.svg) ![Enlarged Image]() ![Newsletter](https://unit42.paloaltonetworks.com/wp-content/uploads/2026/03/unit42-footer-subscribe-desktop.png) ![UNIT 42 Small Logo](https://unit42.paloaltonetworks.com/wp-content/themes/unit42-v6/dist/images/palo-alto-logo-small.svg) Get updates from Unit 42 ## Peace of mind comes from staying ahead of threats. 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