Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240426-en -
resource tags
arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system -
submitted
21-05-2024 15:49
Static task
static1
Behavioral task
behavioral1
Sample
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
Resource
win11-20240426-en
General
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Target
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
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Size
708KB
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MD5
7f3b269130931ecd64e35f048c3a5a45
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SHA1
7434c49a3386c9e6efe98e7f5345c922299adf9c
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SHA256
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501
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SHA512
b941031026e4f3e113606a69630d8fdef11e3fcb79bde51ea238f0a73f84850a52b4e64d39568be052dafc4505ae256b2f503bd38a73d6be436b63fcab86ad83
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SSDEEP
12288:OOfdNRXlGGDv4r+no5iA8uPurQdPbaeNTL58eGpf8lVnKKZ+2yxu6e:O2HzLnqXPEOjJhN8eGpyKGfy3
Malware Config
Extracted
djvu
http://cajgtus.com/test2/get.php
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extension
.vehu
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offline_id
EGfa5svnSGFJka7LZBQoqff0QtO1IpTauoDvGvt1
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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 15 IoCs
Processes:
resource yara_rule behavioral1/memory/2700-2-0x00000000040A0000-0x00000000041BB000-memory.dmp family_djvu behavioral1/memory/4032-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4032-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4032-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4032-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4032-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4128-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4128-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4128-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4128-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4128-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4128-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4128-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4128-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4128-35-0x0000000000400000-0x0000000000537000-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:
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\4e801223-84fe-4135-998c-49f00a2fd8ff\\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe\" --AutoStart" dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.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 4 api.2ip.ua 6 api.2ip.ua 13 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedescription pid process target process PID 2700 set thread context of 4032 2700 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 448 set thread context of 4128 448 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.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:
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exepid process 4032 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe 4032 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe 4128 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe 4128 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exedescription pid process target process PID 2700 wrote to memory of 4032 2700 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2700 wrote to memory of 4032 2700 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2700 wrote to memory of 4032 2700 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2700 wrote to memory of 4032 2700 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2700 wrote to memory of 4032 2700 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2700 wrote to memory of 4032 2700 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2700 wrote to memory of 4032 2700 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2700 wrote to memory of 4032 2700 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2700 wrote to memory of 4032 2700 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 2700 wrote to memory of 4032 2700 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 4032 wrote to memory of 4304 4032 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe icacls.exe PID 4032 wrote to memory of 4304 4032 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe icacls.exe PID 4032 wrote to memory of 4304 4032 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe icacls.exe PID 4032 wrote to memory of 448 4032 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 4032 wrote to memory of 448 4032 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 4032 wrote to memory of 448 4032 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 448 wrote to memory of 4128 448 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 448 wrote to memory of 4128 448 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 448 wrote to memory of 4128 448 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 448 wrote to memory of 4128 448 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 448 wrote to memory of 4128 448 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 448 wrote to memory of 4128 448 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 448 wrote to memory of 4128 448 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 448 wrote to memory of 4128 448 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 448 wrote to memory of 4128 448 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe PID 448 wrote to memory of 4128 448 dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2700 -
C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4032 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\4e801223-84fe-4135-998c-49f00a2fd8ff" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4304 -
C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:448 -
C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe"C:\Users\Admin\AppData\Local\Temp\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4128
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD5df80f9ba75076db634761b6132e0d4e3
SHA107983946fb660752c7cccb2ef82d01ec4c9ecc5d
SHA256d5ff96fd8b416de93a85783192206224cf8821c240cd8ff755f2e8270153dd99
SHA5124ec734c5d29e9ce00b00e42b627253195e8c7a158433fedfcee428e692a6501981c33d7c8a39235f8b691f087145cdbe660b430493edbeedb12588c5cdd5a66a
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize724B
MD58202a1cd02e7d69597995cabbe881a12
SHA18858d9d934b7aa9330ee73de6c476acf19929ff6
SHA25658f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5
SHA51297ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize410B
MD5ce5564a25df9906fd8f0189ca82bb808
SHA10e8c27334d7e141ccb48fae06a537a318f0bfeec
SHA2565a77df8b57d793ca0a5679dae9d235f30fd14863709e4820faa94db745fa6cd0
SHA5128802964b731a586ee201443567434bb6852740bc1412ea7e0faa6b08bdedfa9edd9bc67761b0a1654085cbf13117e5f8c6e21244670be02f97e2ea6514236a64
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD553e6724ce07802f2762cad33a377bc51
SHA10e8c69d58107ffbd9952e202a8d83d82fe0f1e2c
SHA25684288b623764b0e2942e24dbb6d96a89e62c382687b2b30d891ce0c3a32a4934
SHA512fd080eced91715cd7df81714f9b2616a3d869c8c3a2e06fdc6fce6888bb50c11c332a599167856ed9d4674624bb434d17624adfdc11af9f0b9f4d4d52bbfea76
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C:\Users\Admin\AppData\Local\4e801223-84fe-4135-998c-49f00a2fd8ff\dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501.exe
Filesize708KB
MD57f3b269130931ecd64e35f048c3a5a45
SHA17434c49a3386c9e6efe98e7f5345c922299adf9c
SHA256dc1c019f8fdb6cfa8cc568e8e2f49c2da73a8e110c032303fd3c1d50891b0501
SHA512b941031026e4f3e113606a69630d8fdef11e3fcb79bde51ea238f0a73f84850a52b4e64d39568be052dafc4505ae256b2f503bd38a73d6be436b63fcab86ad83