General
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Target
file.exe
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Size
786KB
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Sample
230609-a9r95sae93
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MD5
a5793db5ad98003bfa1a5e0e47c97ff7
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SHA1
1f57b6f70d27a0e5135abc2f301921d7359225e1
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SHA256
90694193de42805e79e29e2dd0de34482f3e2c808bc7798def94ffdffafa71cc
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SHA512
5f2448e31f30e7d46044230229edfbc245f964a4c6ba35d0fe7ef0131ff42c666dcac2a7d5c4a751db284cecdea3ea1bf06f15cd4809c1ada5655b1124fdcc0e
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SSDEEP
12288:X3YucCl9NERfgINJXuVNOrrI6AxQEi0gDLtjLUOVWpeU+VSNtqZJjCpxdPuI:X3aC9GRoW+VNYr4xs5DSlYU+VSOUrN
Static task
static1
Behavioral task
behavioral1
Sample
file.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
file.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
4.2
a81bcf59d85e6e13257840e65b9d1da8
https://steamcommunity.com/profiles/76561199511129510
https://t.me/rechnungsbetrag
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profile_id_v2
a81bcf59d85e6e13257840e65b9d1da8
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user_agent
Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.38 Safari/537.36 Brave/75
Targets
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Target
file.exe
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Size
786KB
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MD5
a5793db5ad98003bfa1a5e0e47c97ff7
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SHA1
1f57b6f70d27a0e5135abc2f301921d7359225e1
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SHA256
90694193de42805e79e29e2dd0de34482f3e2c808bc7798def94ffdffafa71cc
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SHA512
5f2448e31f30e7d46044230229edfbc245f964a4c6ba35d0fe7ef0131ff42c666dcac2a7d5c4a751db284cecdea3ea1bf06f15cd4809c1ada5655b1124fdcc0e
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SSDEEP
12288:X3YucCl9NERfgINJXuVNOrrI6AxQEi0gDLtjLUOVWpeU+VSNtqZJjCpxdPuI:X3aC9GRoW+VNYr4xs5DSlYU+VSOUrN
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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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