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General
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Target
c400cbf24484aebb80dac19e77a0baf4d53facb3f5f753f0ab97a2a75e5572dc
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Size
736KB
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Sample
230422-kefb7sfe61
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MD5
38f67762143f13f19cd9d1cff42dd58d
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SHA1
0387b6a13451c96053aab665f6deefe0b881be7b
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SHA256
c400cbf24484aebb80dac19e77a0baf4d53facb3f5f753f0ab97a2a75e5572dc
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SHA512
ef773fc47a366e5649c11b66961269af5f55f3df10e8f0252ca77c489d154d1ea2f04b34fe5bb8d64ea4b8706263904c43333051c0a058eb90ee4391a765a075
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SSDEEP
12288:5yQaypclfIw2w7qzeFjc/vVctoqXmAQJFNiTeGW6afXcI/zLSqlCNQoG2:5yQarpItw7bQ/qXKITgfMI/zLSLQo
Static task
static1
Behavioral task
behavioral1
Sample
c400cbf24484aebb80dac19e77a0baf4d53facb3f5f753f0ab97a2a75e5572dc.exe
Resource
win10v2004-20230221-en
Malware Config
Extracted
djvu
http://zexeq.com/raud/get.php
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extension
.coza
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offline_id
O8Ao46dcCReRPC4I1PGMYsRFFc9WI5eOp0O3MFt1
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payload_url
http://colisumy.com/dl/build2.exe
http://zexeq.com/files/1/build3.exe
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ransomnote
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Extracted
vidar
3.5
bf58e1879f88b222ba2391682babf9d8
https://steamcommunity.com/profiles/76561199497218285
https://t.me/tg_duckworld
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profile_id_v2
bf58e1879f88b222ba2391682babf9d8
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user_agent
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36 Vivaldi/3.7
Targets
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Target
c400cbf24484aebb80dac19e77a0baf4d53facb3f5f753f0ab97a2a75e5572dc
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Size
736KB
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MD5
38f67762143f13f19cd9d1cff42dd58d
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SHA1
0387b6a13451c96053aab665f6deefe0b881be7b
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SHA256
c400cbf24484aebb80dac19e77a0baf4d53facb3f5f753f0ab97a2a75e5572dc
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SHA512
ef773fc47a366e5649c11b66961269af5f55f3df10e8f0252ca77c489d154d1ea2f04b34fe5bb8d64ea4b8706263904c43333051c0a058eb90ee4391a765a075
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SSDEEP
12288:5yQaypclfIw2w7qzeFjc/vVctoqXmAQJFNiTeGW6afXcI/zLSqlCNQoG2:5yQarpItw7bQ/qXKITgfMI/zLSLQo
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Detected Djvu ransomware
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Downloads MZ/PE file
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE
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Loads dropped DLL
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Modifies file permissions
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Accesses cryptocurrency files/wallets, possible credential harvesting
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Adds Run key to start application
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
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Suspicious use of SetThreadContext
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