General
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Target
1838c49efba3ccf129ea7bd7dba1533400d858408da575ab71ab58c65a7be5dd
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Size
695KB
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Sample
231014-bmhymahd2t
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MD5
3a28b75e9e0d57c5882cb9512b308ea6
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SHA1
8ac7416cd64134f1d6824dab9a612d9bec7b8bf8
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SHA256
1838c49efba3ccf129ea7bd7dba1533400d858408da575ab71ab58c65a7be5dd
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SHA512
82837527a82f7f8499285c58fbe45006e4aa9420ff4ba9e18ec40da7ce13b93effb80533dbbf519adc42594f6684649be9c16c77e06cd6f7e3b9d4a59ed1ca1a
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SSDEEP
12288:wmlhY3lGoChg3/n79Q9Je3gI+CIYKPNhhoAKu5mMTbWvi+Veu:R8GLhgv7V3CLYmHWiQiye
Static task
static1
Behavioral task
behavioral1
Sample
1838c49efba3ccf129ea7bd7dba1533400d858408da575ab71ab58c65a7be5dd.exe
Resource
win7-20230831-en
Behavioral task
behavioral2
Sample
1838c49efba3ccf129ea7bd7dba1533400d858408da575ab71ab58c65a7be5dd.exe
Resource
win10v2004-20230915-en
Malware Config
Extracted
djvu
http://zexeq.com/test1/get.php
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extension
.oopl
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offline_id
dhL6XvokZotUzL67Na5WfNIBufODsob7eYc3mzt1
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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
6
d37c48c18c73cc0e155c7e1dfde06db9
https://steamcommunity.com/profiles/76561199560322242
https://t.me/cahalgo
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profile_id_v2
d37c48c18c73cc0e155c7e1dfde06db9
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user_agent
Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/111.0 uacq
Extracted
vidar
R
Targets
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Target
1838c49efba3ccf129ea7bd7dba1533400d858408da575ab71ab58c65a7be5dd
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Size
695KB
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MD5
3a28b75e9e0d57c5882cb9512b308ea6
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SHA1
8ac7416cd64134f1d6824dab9a612d9bec7b8bf8
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SHA256
1838c49efba3ccf129ea7bd7dba1533400d858408da575ab71ab58c65a7be5dd
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SHA512
82837527a82f7f8499285c58fbe45006e4aa9420ff4ba9e18ec40da7ce13b93effb80533dbbf519adc42594f6684649be9c16c77e06cd6f7e3b9d4a59ed1ca1a
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SSDEEP
12288:wmlhY3lGoChg3/n79Q9Je3gI+CIYKPNhhoAKu5mMTbWvi+Veu:R8GLhgv7V3CLYmHWiQiye
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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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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1