Analysis
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max time kernel
144s -
max time network
123s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
26-05-2024 00:40
Static task
static1
Behavioral task
behavioral1
Sample
f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
Resource
win11-20240419-en
General
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Target
f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
-
Size
733KB
-
MD5
8ca4e6f32c4f0ca55963d2719ae94a1c
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SHA1
16487b0129fed84f05ad959f32f5ca1669f1d8b9
-
SHA256
f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e
-
SHA512
6975fe9a36740c1edc711afb68463b77090e15305355a3e82861721ccdd440bfae29f03b9a5da8b82f5125075a73678a54c7f72408ea99db3d9b4699d64948bd
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SSDEEP
12288:Gl/6v07qke/ROYqGQslDPL9zEJ3YUCZfFlHpKDcCLVAtQQctFlD5r4:Glw7/8YpdbpzwgaT/rjO
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
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extension
.vepi
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offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
-
payload_url
http://sdfjhuz.com/dl/build2.exe
http://cajgtus.com/files/1/build3.exe
-
ransomnote
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Signatures
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Detected Djvu ransomware 15 IoCs
Processes:
resource yara_rule behavioral1/memory/2876-2-0x0000000004A40000-0x0000000004B5B000-memory.dmp family_djvu behavioral1/memory/3380-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3380-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3380-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3380-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/3380-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4476-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4476-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4476-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4476-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4476-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4476-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4476-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4476-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4476-37-0x0000000000400000-0x0000000000537000-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:
f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\7cfe4688-365c-4f94-8551-ba717b88c1f1\\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe\" --AutoStart" f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe -
Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
Processes:
flow ioc 3 api.2ip.ua 5 api.2ip.ua 16 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exef3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exedescription pid process target process PID 2876 set thread context of 3380 2876 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 4628 set thread context of 4476 4628 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
Processes:
f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exef3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exepid process 3380 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe 3380 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe 4476 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe 4476 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exef3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exef3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exedescription pid process target process PID 2876 wrote to memory of 3380 2876 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 2876 wrote to memory of 3380 2876 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 2876 wrote to memory of 3380 2876 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 2876 wrote to memory of 3380 2876 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 2876 wrote to memory of 3380 2876 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 2876 wrote to memory of 3380 2876 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 2876 wrote to memory of 3380 2876 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 2876 wrote to memory of 3380 2876 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 2876 wrote to memory of 3380 2876 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 2876 wrote to memory of 3380 2876 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 3380 wrote to memory of 4992 3380 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe icacls.exe PID 3380 wrote to memory of 4992 3380 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe icacls.exe PID 3380 wrote to memory of 4992 3380 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe icacls.exe PID 3380 wrote to memory of 4628 3380 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 3380 wrote to memory of 4628 3380 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 3380 wrote to memory of 4628 3380 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 4628 wrote to memory of 4476 4628 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 4628 wrote to memory of 4476 4628 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 4628 wrote to memory of 4476 4628 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 4628 wrote to memory of 4476 4628 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 4628 wrote to memory of 4476 4628 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 4628 wrote to memory of 4476 4628 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 4628 wrote to memory of 4476 4628 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 4628 wrote to memory of 4476 4628 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 4628 wrote to memory of 4476 4628 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe PID 4628 wrote to memory of 4476 4628 f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe"C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe"C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.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\7cfe4688-365c-4f94-8551-ba717b88c1f1" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe"C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe"C:\Users\Admin\AppData\Local\Temp\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EAFilesize
1KB
MD5dd3850d9ce5a33ba453ba4d1dfb4ba51
SHA1df05b044dd14e7d009aad0398686bbfd6fff1491
SHA256e9e041a83d7f3dbd6adfeda50b7ff9d3fd1abfcfb4fc5906d481c33db7072b85
SHA512ec27ccc61d0133a76a612d5ddde2c6193f96302e17f66a75da8e1ad18ee871fe6b307e535317726449dc724331d4f48376d03201ad8d9dc2985aa0420d45b8e4
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EAFilesize
410B
MD5f09164b064c7f678a0d13b43d0339bbb
SHA145a9dbe33f992c526b2e96422fb1e28fb150d5ec
SHA256554cb19d33fc9880993a9e596bb49b49d65c8552dd48a68cf8c95ad8178c94b6
SHA512bd440bc9e093ee5149790aea577c6689bb76e8313f3add7113f39ac56bfd6945a839ef6cce4a37e0345b5524f2857c2be42d5aed1151faad4018d0f4d9f3cdae
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
392B
MD5b6a385a6367f191d157cb222ca3a6389
SHA1324f2b8a5fbd651c22296e7dfce4e96c4555834d
SHA256d0f8fc42b07d84008a9607c6716e34021cd2695c1f81d5fa27072f2d7fcd8855
SHA512da051157aeac4fa6bd42e882aec3519b46d7516b991d4caf0afb79ca99e4ee7875e155448057d7faebd5c28bec42c080cb21652bea0d5ffcac1ce20bfa23128e
-
C:\Users\Admin\AppData\Local\7cfe4688-365c-4f94-8551-ba717b88c1f1\f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e.exeFilesize
733KB
MD58ca4e6f32c4f0ca55963d2719ae94a1c
SHA116487b0129fed84f05ad959f32f5ca1669f1d8b9
SHA256f3991c138aae20c9c8104b340a0a21628af7b432f95dc709dfe6812e6a35ef5e
SHA5126975fe9a36740c1edc711afb68463b77090e15305355a3e82861721ccdd440bfae29f03b9a5da8b82f5125075a73678a54c7f72408ea99db3d9b4699d64948bd
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memory/2876-2-0x0000000004A40000-0x0000000004B5B000-memory.dmpFilesize
1.1MB
-
memory/2876-1-0x0000000004990000-0x0000000004A32000-memory.dmpFilesize
648KB
-
memory/3380-6-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/3380-4-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/3380-19-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/3380-3-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/3380-5-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/4476-28-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/4476-27-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4476-22-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4476-29-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/4476-32-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4476-35-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/4476-34-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/4476-36-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4476-37-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB