Analysis
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max time kernel
106s -
max time network
112s -
platform
windows10-2004_x64 -
resource
win10v2004-20240709-en -
resource tags
arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system -
submitted
26-07-2024 02:44
Static task
static1
Behavioral task
behavioral1
Sample
5c171af1b9174fd62c8a9e3f2de9df00N.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
5c171af1b9174fd62c8a9e3f2de9df00N.exe
Resource
win10v2004-20240709-en
General
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Target
5c171af1b9174fd62c8a9e3f2de9df00N.exe
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Size
888KB
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MD5
5c171af1b9174fd62c8a9e3f2de9df00
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SHA1
88586368c833ce427e3e28af0a7bd5a18b0add4c
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SHA256
856fed29facb17f62dd6449b1cfabe65de2b8cb478e52417e7c0069bde7db864
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SHA512
5675000af023d8c2f1c4c9091f4356178ec2c8975f66ad259483ea02c9bf458280449143d64ad13ec2b65f81380da80eb7a835546752fbbfa1c917f5553f4af1
-
SSDEEP
24576:4TJYdNu+4/LN1WKVQ7A6WNETiczoc9myk:4GV4/LK+pPwRNmy
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
-
extension
.watz
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offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
- payload_url
-
ransomnote
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Signatures
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Detected Djvu ransomware 9 IoCs
Processes:
resource yara_rule behavioral2/memory/2376-2-0x0000000002270000-0x000000000238B000-memory.dmp family_djvu behavioral2/memory/1328-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1328-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1328-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1328-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1328-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2964-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2964-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/2964-23-0x0000000000400000-0x0000000000537000-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:
5c171af1b9174fd62c8a9e3f2de9df00N.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1705699165-553239100-4129523827-1000\Control Panel\International\Geo\Nation 5c171af1b9174fd62c8a9e3f2de9df00N.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
5c171af1b9174fd62c8a9e3f2de9df00N.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1705699165-553239100-4129523827-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\32a17bb1-8f22-430d-8bcc-e4ec3958227a\\5c171af1b9174fd62c8a9e3f2de9df00N.exe\" --AutoStart" 5c171af1b9174fd62c8a9e3f2de9df00N.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 22 api.2ip.ua 23 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
5c171af1b9174fd62c8a9e3f2de9df00N.exe5c171af1b9174fd62c8a9e3f2de9df00N.exedescription pid process target process PID 2376 set thread context of 1328 2376 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2496 set thread context of 2964 2496 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.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 3580 2964 WerFault.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe -
System Location Discovery: System Language Discovery 1 TTPs 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
Processes:
5c171af1b9174fd62c8a9e3f2de9df00N.exe5c171af1b9174fd62c8a9e3f2de9df00N.exeicacls.exe5c171af1b9174fd62c8a9e3f2de9df00N.exe5c171af1b9174fd62c8a9e3f2de9df00N.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 5c171af1b9174fd62c8a9e3f2de9df00N.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 5c171af1b9174fd62c8a9e3f2de9df00N.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language icacls.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 5c171af1b9174fd62c8a9e3f2de9df00N.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 5c171af1b9174fd62c8a9e3f2de9df00N.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
5c171af1b9174fd62c8a9e3f2de9df00N.exepid process 1328 5c171af1b9174fd62c8a9e3f2de9df00N.exe 1328 5c171af1b9174fd62c8a9e3f2de9df00N.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
5c171af1b9174fd62c8a9e3f2de9df00N.exe5c171af1b9174fd62c8a9e3f2de9df00N.exe5c171af1b9174fd62c8a9e3f2de9df00N.exedescription pid process target process PID 2376 wrote to memory of 1328 2376 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2376 wrote to memory of 1328 2376 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2376 wrote to memory of 1328 2376 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2376 wrote to memory of 1328 2376 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2376 wrote to memory of 1328 2376 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2376 wrote to memory of 1328 2376 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2376 wrote to memory of 1328 2376 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2376 wrote to memory of 1328 2376 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2376 wrote to memory of 1328 2376 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2376 wrote to memory of 1328 2376 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 1328 wrote to memory of 4000 1328 5c171af1b9174fd62c8a9e3f2de9df00N.exe icacls.exe PID 1328 wrote to memory of 4000 1328 5c171af1b9174fd62c8a9e3f2de9df00N.exe icacls.exe PID 1328 wrote to memory of 4000 1328 5c171af1b9174fd62c8a9e3f2de9df00N.exe icacls.exe PID 1328 wrote to memory of 2496 1328 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 1328 wrote to memory of 2496 1328 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 1328 wrote to memory of 2496 1328 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2496 wrote to memory of 2964 2496 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2496 wrote to memory of 2964 2496 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2496 wrote to memory of 2964 2496 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2496 wrote to memory of 2964 2496 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2496 wrote to memory of 2964 2496 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2496 wrote to memory of 2964 2496 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2496 wrote to memory of 2964 2496 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2496 wrote to memory of 2964 2496 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2496 wrote to memory of 2964 2496 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe PID 2496 wrote to memory of 2964 2496 5c171af1b9174fd62c8a9e3f2de9df00N.exe 5c171af1b9174fd62c8a9e3f2de9df00N.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe"C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2376 -
C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe"C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1328 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\32a17bb1-8f22-430d-8bcc-e4ec3958227a" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
- System Location Discovery: System Language Discovery
PID:4000 -
C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe"C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2496 -
C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe"C:\Users\Admin\AppData\Local\Temp\5c171af1b9174fd62c8a9e3f2de9df00N.exe" --Admin IsNotAutoStart IsNotTask4⤵
- System Location Discovery: System Language Discovery
PID:2964 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 2964 -s 5685⤵
- Program crash
PID:3580
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2964 -ip 29641⤵PID:4360
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\32a17bb1-8f22-430d-8bcc-e4ec3958227a\5c171af1b9174fd62c8a9e3f2de9df00N.exe
Filesize888KB
MD55c171af1b9174fd62c8a9e3f2de9df00
SHA188586368c833ce427e3e28af0a7bd5a18b0add4c
SHA256856fed29facb17f62dd6449b1cfabe65de2b8cb478e52417e7c0069bde7db864
SHA5125675000af023d8c2f1c4c9091f4356178ec2c8975f66ad259483ea02c9bf458280449143d64ad13ec2b65f81380da80eb7a835546752fbbfa1c917f5553f4af1