General
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Target
49def58b6d715af7c26bc27faeb4e3f8f0f97b9d4a50dc1f1c12cd65791657d8
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Size
750KB
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Sample
230606-jcgltace57
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MD5
85ed24cbf6a15f2643c3fcd2a7171759
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SHA1
d8357c6b2620f2f3695409bf6b650e84eebed0d7
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SHA256
49def58b6d715af7c26bc27faeb4e3f8f0f97b9d4a50dc1f1c12cd65791657d8
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SHA512
2c248c6f6b5eb6231817f24839d5e4d23c96ffe096b07f3795900ecd7cc5d0e568b51c630b105286dd0a714b88688b2ab1d9e974c704faec430209eeafdc376e
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SSDEEP
12288:X5PG9M5//MIpGA7SsJ9hXKc4Q/h0JwRB1o1cwcKuFzM2aetUHymN:X5PB/McGbsJnX/4QZy0B1oqwzKgeeH
Static task
static1
Behavioral task
behavioral1
Sample
49def58b6d715af7c26bc27faeb4e3f8f0f97b9d4a50dc1f1c12cd65791657d8.exe
Resource
win10v2004-20230220-en
Malware Config
Extracted
djvu
http://zexeq.com/test1/get.php
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extension
.nerz
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offline_id
0vTA6MA1m5nzrdffOCJC7YmAa4Lp6YNN8lOJ4mt1
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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
4.1
77a63e71a10ee1d81a28b5c866b75922
https://steamcommunity.com/profiles/76561199510444991
https://t.me/task4manager
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profile_id_v2
77a63e71a10ee1d81a28b5c866b75922
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user_agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36 Edg/112.0.1722.34
Targets
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Target
49def58b6d715af7c26bc27faeb4e3f8f0f97b9d4a50dc1f1c12cd65791657d8
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Size
750KB
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MD5
85ed24cbf6a15f2643c3fcd2a7171759
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SHA1
d8357c6b2620f2f3695409bf6b650e84eebed0d7
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SHA256
49def58b6d715af7c26bc27faeb4e3f8f0f97b9d4a50dc1f1c12cd65791657d8
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SHA512
2c248c6f6b5eb6231817f24839d5e4d23c96ffe096b07f3795900ecd7cc5d0e568b51c630b105286dd0a714b88688b2ab1d9e974c704faec430209eeafdc376e
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SSDEEP
12288:X5PG9M5//MIpGA7SsJ9hXKc4Q/h0JwRB1o1cwcKuFzM2aetUHymN:X5PB/McGbsJnX/4QZy0B1oqwzKgeeH
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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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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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