Analysis
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max time kernel
79s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
26/01/2024, 05:32
Static task
static1
Behavioral task
behavioral1
Sample
16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe
Resource
win10v2004-20231215-en
General
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Target
16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe
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Size
744KB
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MD5
a29a054b916c7fb3a6b10e18c54cb9ec
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SHA1
bf756199ed02aa04bbfacad49ea51333f6a3a999
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SHA256
16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34
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SHA512
78b3d4425acc21dbf40e9df6015db6bb9a3729506845e6be3e025027fc6142469b3b353a543c85730ccddb136ef93e85fc9209dc03af3ac667b0006c49c6b43d
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SSDEEP
12288:tBWA0WS1K08QHydsNMhhgQnKT310AmvToMJyng+q4hvhyHOaeVoajKZTlReJEKfc:c8XQSdI25KT1+LQnVqUAHOaeVQlgXf
Malware Config
Extracted
djvu
http://habrafa.com/test1/get.php
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extension
.cdpo
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offline_id
Bn3q97hwLouKbhkQRNO4SeV07gjdEQVm8NKhg0t1
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payload_url
http://brusuax.com/dl/build2.exe
http://habrafa.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 9 IoCs
resource yara_rule behavioral2/memory/2396-2-0x0000000002340000-0x000000000245B000-memory.dmp family_djvu behavioral2/memory/3752-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3752-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3752-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3752-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3752-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4072-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4072-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4072-23-0x0000000000400000-0x0000000000537000-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.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\Control Panel\International\Geo\Nation 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 660 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3073191680-435865314-2862784915-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\07e127b3-8619-4db8-af6c-2b4fee2a52ff\\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe\" --AutoStart" 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.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.
flow ioc 8 api.2ip.ua 9 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 2396 set thread context of 3752 2396 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 88 PID 1476 set thread context of 4072 1476 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 92 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Program crash 1 IoCs
pid pid_target Process procid_target 4736 4072 WerFault.exe 92 -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 3752 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 3752 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 2396 wrote to memory of 3752 2396 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 88 PID 2396 wrote to memory of 3752 2396 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 88 PID 2396 wrote to memory of 3752 2396 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 88 PID 2396 wrote to memory of 3752 2396 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 88 PID 2396 wrote to memory of 3752 2396 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 88 PID 2396 wrote to memory of 3752 2396 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 88 PID 2396 wrote to memory of 3752 2396 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 88 PID 2396 wrote to memory of 3752 2396 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 88 PID 2396 wrote to memory of 3752 2396 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 88 PID 2396 wrote to memory of 3752 2396 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 88 PID 3752 wrote to memory of 660 3752 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 89 PID 3752 wrote to memory of 660 3752 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 89 PID 3752 wrote to memory of 660 3752 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 89 PID 3752 wrote to memory of 1476 3752 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 90 PID 3752 wrote to memory of 1476 3752 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 90 PID 3752 wrote to memory of 1476 3752 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 90 PID 1476 wrote to memory of 4072 1476 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 92 PID 1476 wrote to memory of 4072 1476 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 92 PID 1476 wrote to memory of 4072 1476 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 92 PID 1476 wrote to memory of 4072 1476 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 92 PID 1476 wrote to memory of 4072 1476 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 92 PID 1476 wrote to memory of 4072 1476 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 92 PID 1476 wrote to memory of 4072 1476 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 92 PID 1476 wrote to memory of 4072 1476 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 92 PID 1476 wrote to memory of 4072 1476 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 92 PID 1476 wrote to memory of 4072 1476 16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe 92
Processes
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C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe"C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2396 -
C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe"C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3752 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\07e127b3-8619-4db8-af6c-2b4fee2a52ff" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:660
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C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe"C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1476 -
C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe"C:\Users\Admin\AppData\Local\Temp\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe" --Admin IsNotAutoStart IsNotTask4⤵PID:4072
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 4072 -s 5685⤵
- Program crash
PID:4736
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4072 -ip 40721⤵PID:3544
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\07e127b3-8619-4db8-af6c-2b4fee2a52ff\16166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34.exe
Filesize744KB
MD5a29a054b916c7fb3a6b10e18c54cb9ec
SHA1bf756199ed02aa04bbfacad49ea51333f6a3a999
SHA25616166b986cd8f0c86be967a2520ea7a6e25a9792d73a5516ad6de37702e87c34
SHA51278b3d4425acc21dbf40e9df6015db6bb9a3729506845e6be3e025027fc6142469b3b353a543c85730ccddb136ef93e85fc9209dc03af3ac667b0006c49c6b43d