North Korea-nexus Golang Backdoor/Stealer from Contagious Interview campaign

2025-01-05 dmpdump

https://dmpdump.github.io/posts/NorthKorea_Backdoor_Stealer/

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The Contagious Interview sample analyzed by dmpdump used fake Willo candidate-screening sites to lure victims into running a copied shell command. The shared VCam_intel.zip artifact contained Windows, macOS and Linux material, with macOS scripts downloading architecture-specific payloads from api.nvidia-cloud[.]online, unpacking them under /var/tmp/VCam and installing a LaunchAgent at ~/Library/LaunchAgents/com.vcam.plist. The vcamservice.sh script built and ran a Golang payload from app.go, which generated a victim ID, checked for duplicate execution and contacted http://216.74.123[.]191:8080. The activity fits North Korea-nexus Contagious Interview tradecraft aimed at crypto-wallet theft through job-interview lures and cross-platform tooling.

Indicators of Compromise

Type Value First Seen Last Seen
DOMAIN api.jz-aws.info 2025-01-05 2025-08-28
HASH 60ec2dbe8cfacdff1d4eb093032b030… 2025-01-05 2025-08-25
HASH b72653bf747b962c67a5999afbc1d91… 2025-01-05 2025-08-25
IPv4 216.74.123.191 2025-01-05 2025-08-25
URL https://api.nvidia-cloud.online… 2025-01-05 2025-02-13
URL https://api.nvidia-cloud.online… 2025-01-05 2025-02-13
DOMAIN connect.trezor.io 2025-01-05 2025-02-13
DOMAIN api.nvidia-cloud.online 2025-01-05 2025-02-13
URL https://api.jz-aws.info/public/… 2025-01-05 2025-01-20
HASH 7a2dea687c9ab3a86a82893014c926b… 2025-01-05 2025-01-05
HASH b4b0e19a98deeccc9f9f7dc5f18999c… 2025-01-05 2025-01-05
URL https://www.api.camera-drive.cl… 2025-01-05 2025-01-05

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