Analysis
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max time kernel
131s -
max time network
124s -
platform
windows10-2004_x64 -
resource
win10v2004-20240508-en -
resource tags
arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system -
submitted
02-06-2024 12:30
Behavioral task
behavioral1
Sample
2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe
Resource
win10v2004-20240508-en
General
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Target
2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe
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Size
1.1MB
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MD5
bb4dbc367ea4bc382d5643b295b63877
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SHA1
854f85a6aef15c6a8f583e51bd89f8982424e4cb
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SHA256
2d1c0fd8ad642c4e20911b02c5546f81b6e1eeb26eeea1d39976f7f33d3cb65a
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SHA512
a342565242a6d315aeea8b8f3e97f8e373d3f35647e536ac56d7ad7a88c45db87448818c89b428a23d968f09143b7d1b09f54860e56a433a739c2717be6dce0f
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SSDEEP
24576:ZBUIKn/vwOXGUXAjCymYZiVtElVIBT2roqnTSSxWeT/dRPOO89WQHUq7:F0dwAYZt6C31WeTVRPOh97Uq7
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
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extension
.qepi
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offline_id
jgILOjDrBgyzY4JmT3B2jDSyBmDPBruKk8bKs6t1
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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 1 IoCs
Processes:
resource yara_rule C:\Users\Admin\AppData\Local\969e3745-0ceb-47b1-94e2-5f15eabe1a65\2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe 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:
2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\969e3745-0ceb-47b1-94e2-5f15eabe1a65\\2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe\" --AutoStart" 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.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 4 api.2ip.ua 12 api.2ip.ua -
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:
2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exepid process 3620 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe 3620 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe 1984 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe 1984 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exedescription pid process target process PID 3620 wrote to memory of 2748 3620 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe icacls.exe PID 3620 wrote to memory of 2748 3620 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe icacls.exe PID 3620 wrote to memory of 2748 3620 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe icacls.exe PID 3620 wrote to memory of 1984 3620 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe PID 3620 wrote to memory of 1984 3620 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe PID 3620 wrote to memory of 1984 3620 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe 2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe"1⤵
- 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\969e3745-0ceb-47b1-94e2-5f15eabe1a65" /deny *S-1-1-0:(OI)(CI)(DE,DC)2⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe"C:\Users\Admin\AppData\Local\Temp\2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exe" --Admin IsNotAutoStart IsNotTask2⤵
- 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
MD58999aa854e3cae2cc82a314dc12420a3
SHA1e9d06ba69f37453368b35b0f601e3c391fc36e86
SHA256d9ce037a484b0cd8841a9f2ff72f44e4c1106b4edd257f76eaf4203e345cf196
SHA512b840dfcdc27db311280d0731f9b4fc36e0a1a7e16090d6e4936bb1d011994b9a585b2393af9aea80ace8468430309cd26acc5220d39a4173574c4d5198f644be
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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
MD5ee3933a325c8cadcb564b14626d7fba8
SHA131829efb39df2904f0fef356a4028c16cd80bb45
SHA256cdd3d81bf12b42ad73076df555c7efc6a32584a3ddde249b7b3b534d3711f7f6
SHA512d430995a508a48ba9ab5c81b7ba0b53559f2f7c15b1ed900d456a1dc56330027286d0ce6f71ae1a92b3c61057db5ce308794b3ac5a7391c8e62d75aff860517c
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
392B
MD555c00275df7ce71d5070f0195b1b74a7
SHA1c1f7c05e9d2439a0fe9c7931f3f21b9872c65339
SHA25668b30fc9d648fa92b902d1d45a871859d25c928d2691ab093572bb2a48022dd1
SHA5125de144af21121df93db2f2c39cd12f2c475379986ab10378778d7ea77226c4c03011468a2c75f23acda9f26da16a6edf077c601f9d7a06a8677e4eb68ef2dde7
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C:\Users\Admin\AppData\Local\969e3745-0ceb-47b1-94e2-5f15eabe1a65\2024-06-02_bb4dbc367ea4bc382d5643b295b63877_stop.exeFilesize
1.1MB
MD5bb4dbc367ea4bc382d5643b295b63877
SHA1854f85a6aef15c6a8f583e51bd89f8982424e4cb
SHA2562d1c0fd8ad642c4e20911b02c5546f81b6e1eeb26eeea1d39976f7f33d3cb65a
SHA512a342565242a6d315aeea8b8f3e97f8e373d3f35647e536ac56d7ad7a88c45db87448818c89b428a23d968f09143b7d1b09f54860e56a433a739c2717be6dce0f