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Analysis
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max time kernel
91s -
max time network
142s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system -
submitted
29/12/2024, 08:57
Static task
static1
Behavioral task
behavioral1
Sample
299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe
Resource
win7-20240708-en
Behavioral task
behavioral2
Sample
299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe
Resource
win10v2004-20241007-en
General
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Target
299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe
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Size
814KB
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MD5
8db858c113bf9da58fa9a7524c7023e9
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SHA1
d2a8dad63d4c66d3ac446c64f7c682584ab8b069
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SHA256
299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0
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SHA512
6336cd7afa29d5b8e36fb2279af3aa3e2da9f657a1769bf7dc6b6d60cff2e785f092fba3434af39abffe45cb9215bf7b852ced79d612f53c1b819f037042606f
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SSDEEP
24576:QEDLISgyeNv0em9UBCV44ecLfN2LiktuUcrwwN:QQeaeE44BULikBi3
Malware Config
Extracted
djvu
http://acacaca.org/test1/get.php
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extension
.vvew
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offline_id
rE5LpDv2ftYRXAo7bC18EpzfRMTHSGjgfyIMfZt1
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payload_url
http://rgyui.top/dl/build2.exe
http://acacaca.org/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/1728-2-0x0000000002360000-0x000000000247B000-memory.dmp family_djvu behavioral2/memory/1268-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1268-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1268-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1268-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/1268-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3080-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3080-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3080-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Djvu 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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4944 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\0a1ede29-e8e6-4371-9714-42e73acc0f45\\299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe\" --AutoStart" 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.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 11 api.2ip.ua 12 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1728 set thread context of 1268 1728 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 81 PID 2540 set thread context of 3080 2540 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 87 -
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 4724 3080 WerFault.exe 87 -
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.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language icacls.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 1268 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 1268 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 1728 wrote to memory of 1268 1728 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 81 PID 1728 wrote to memory of 1268 1728 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 81 PID 1728 wrote to memory of 1268 1728 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 81 PID 1728 wrote to memory of 1268 1728 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 81 PID 1728 wrote to memory of 1268 1728 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 81 PID 1728 wrote to memory of 1268 1728 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 81 PID 1728 wrote to memory of 1268 1728 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 81 PID 1728 wrote to memory of 1268 1728 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 81 PID 1728 wrote to memory of 1268 1728 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 81 PID 1728 wrote to memory of 1268 1728 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 81 PID 1268 wrote to memory of 4944 1268 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 82 PID 1268 wrote to memory of 4944 1268 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 82 PID 1268 wrote to memory of 4944 1268 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 82 PID 1268 wrote to memory of 2540 1268 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 83 PID 1268 wrote to memory of 2540 1268 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 83 PID 1268 wrote to memory of 2540 1268 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 83 PID 2540 wrote to memory of 3080 2540 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 87 PID 2540 wrote to memory of 3080 2540 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 87 PID 2540 wrote to memory of 3080 2540 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 87 PID 2540 wrote to memory of 3080 2540 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 87 PID 2540 wrote to memory of 3080 2540 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 87 PID 2540 wrote to memory of 3080 2540 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 87 PID 2540 wrote to memory of 3080 2540 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 87 PID 2540 wrote to memory of 3080 2540 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 87 PID 2540 wrote to memory of 3080 2540 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 87 PID 2540 wrote to memory of 3080 2540 299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe 87
Processes
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C:\Users\Admin\AppData\Local\Temp\299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe"C:\Users\Admin\AppData\Local\Temp\299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1728 -
C:\Users\Admin\AppData\Local\Temp\299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe"C:\Users\Admin\AppData\Local\Temp\299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.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:1268 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\0a1ede29-e8e6-4371-9714-42e73acc0f45" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
- System Location Discovery: System Language Discovery
PID:4944
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C:\Users\Admin\AppData\Local\Temp\299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe"C:\Users\Admin\AppData\Local\Temp\299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2540 -
C:\Users\Admin\AppData\Local\Temp\299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe"C:\Users\Admin\AppData\Local\Temp\299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe" --Admin IsNotAutoStart IsNotTask4⤵
- System Location Discovery: System Language Discovery
PID:3080 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 3080 -s 5685⤵
- Program crash
PID:4724
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 3080 -ip 30801⤵PID:4744
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\0a1ede29-e8e6-4371-9714-42e73acc0f45\299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0.exe
Filesize814KB
MD58db858c113bf9da58fa9a7524c7023e9
SHA1d2a8dad63d4c66d3ac446c64f7c682584ab8b069
SHA256299a64d47dbc636d81fc76f4c6837c5c0faf4e0a8aa8460dfb8877c2d7fa41d0
SHA5126336cd7afa29d5b8e36fb2279af3aa3e2da9f657a1769bf7dc6b6d60cff2e785f092fba3434af39abffe45cb9215bf7b852ced79d612f53c1b819f037042606f