Analysis
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max time kernel
140s -
max time network
139s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system -
submitted
25-04-2024 02:11
Static task
static1
Behavioral task
behavioral1
Sample
f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe
Resource
win10v2004-20240412-en
General
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Target
f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe
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Size
763KB
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MD5
e9ff14a975f084f01373d468c0b91a16
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SHA1
302d4b9f88ae7b085b56661774d6805156039924
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SHA256
f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe
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SHA512
4c7965f1f1a123b57ab9ca49cd4b3db35c9d98086eec4cdd297b9b706d68dac25183d052934f564f935459c49471c953453202a99b8f0d62e03b0626d8c41ce0
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SSDEEP
12288:M2dc5bz6tqdDlvGkNwikL95whi6SY7Mf6cMFqNjOjNiaUORnV77J1BDg:uWqdBpNwJLsi6v7iMpxDV77J3s
Malware Config
Extracted
djvu
http://cajgtus.com/test2/get.php
-
extension
.bgzq
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offline_id
Z6iwSvCoAt8T8K2ROxecuXHPNHv7eDyWrc8Ks7t1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 9 IoCs
Processes:
resource yara_rule behavioral2/memory/2752-2-0x0000000005EE0000-0x0000000005FFB000-memory.dmp family_djvu behavioral2/memory/3580-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3580-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3580-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3580-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3580-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/668-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/668-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/668-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\269ba48f-d7ba-4ee6-aeb8-47a63d8ed632\\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe\" --AutoStart" f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe -
Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 13 api.2ip.ua 14 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exef6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exedescription pid process target process PID 2752 set thread context of 3580 2752 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 3056 set thread context of 668 3056 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
Processes:
WerFault.exepid pid_target process target process 3660 668 WerFault.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exepid process 3580 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe 3580 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exef6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exef6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exedescription pid process target process PID 2752 wrote to memory of 3580 2752 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 2752 wrote to memory of 3580 2752 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 2752 wrote to memory of 3580 2752 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 2752 wrote to memory of 3580 2752 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 2752 wrote to memory of 3580 2752 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 2752 wrote to memory of 3580 2752 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 2752 wrote to memory of 3580 2752 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 2752 wrote to memory of 3580 2752 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 2752 wrote to memory of 3580 2752 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 2752 wrote to memory of 3580 2752 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 3580 wrote to memory of 4496 3580 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe icacls.exe PID 3580 wrote to memory of 4496 3580 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe icacls.exe PID 3580 wrote to memory of 4496 3580 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe icacls.exe PID 3580 wrote to memory of 3056 3580 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 3580 wrote to memory of 3056 3580 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 3580 wrote to memory of 3056 3580 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 3056 wrote to memory of 668 3056 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 3056 wrote to memory of 668 3056 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 3056 wrote to memory of 668 3056 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 3056 wrote to memory of 668 3056 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 3056 wrote to memory of 668 3056 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 3056 wrote to memory of 668 3056 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 3056 wrote to memory of 668 3056 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 3056 wrote to memory of 668 3056 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 3056 wrote to memory of 668 3056 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe PID 3056 wrote to memory of 668 3056 f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe"C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe"C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\269ba48f-d7ba-4ee6-aeb8-47a63d8ed632" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe"C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe"C:\Users\Admin\AppData\Local\Temp\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exe" --Admin IsNotAutoStart IsNotTask4⤵
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 668 -s 5685⤵
- Program crash
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 668 -ip 6681⤵
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\Local\269ba48f-d7ba-4ee6-aeb8-47a63d8ed632\f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe.exeFilesize
763KB
MD5e9ff14a975f084f01373d468c0b91a16
SHA1302d4b9f88ae7b085b56661774d6805156039924
SHA256f6a6765642f0f8c4b81f45d4e1a9f65505432bbf4c249fa3c96b82d9c712effe
SHA5124c7965f1f1a123b57ab9ca49cd4b3db35c9d98086eec4cdd297b9b706d68dac25183d052934f564f935459c49471c953453202a99b8f0d62e03b0626d8c41ce0
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memory/668-20-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/668-21-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/668-23-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/2752-1-0x0000000004680000-0x0000000004716000-memory.dmpFilesize
600KB
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memory/2752-2-0x0000000005EE0000-0x0000000005FFB000-memory.dmpFilesize
1.1MB
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memory/3056-18-0x0000000004460000-0x00000000044F6000-memory.dmpFilesize
600KB
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memory/3580-3-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3580-4-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3580-5-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3580-6-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/3580-15-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB