Analysis
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max time kernel
141s -
max time network
129s -
platform
windows11-21h2_x64 -
resource
win11-20240426-en -
resource tags
arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system -
submitted
29-05-2024 15:39
Static task
static1
Behavioral task
behavioral1
Sample
abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
Resource
win11-20240426-en
General
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Target
abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
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Size
791KB
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MD5
7e757f9cbab5888783a4fd47505e1545
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SHA1
0540526f08a8580dc4ef120b10fad767364af1b1
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SHA256
abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139
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SHA512
da8224fb54b2ff692aed76cd49e2c8bbb8a11ffca58bcf48606e1e8396948693f9107d619c97f019c4e0acd425ed35e3851948d2f41dd84fcb897741b60b6760
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SSDEEP
12288:3np5gTpUK81TioQkv4BDrvcVenLNUjYbqtQDzrSP0gjsOit+02wj:3np5gTOX1Ti8wB3XnR1zesgriY02wj
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 behavioral2/memory/4872-2-0x0000000003E00000-0x0000000003F1B000-memory.dmp family_djvu behavioral2/memory/396-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/396-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/396-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/396-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/396-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/240-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/240-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/240-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/240-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/240-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/240-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/240-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/240-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/240-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-1230210488-3096403634-4129516247-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\71d7a078-c93a-40b5-b3b3-5523422e5106\\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe\" --AutoStart" abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.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 1 api.2ip.ua 2 api.2ip.ua 6 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exeabf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exedescription pid process target process PID 4872 set thread context of 396 4872 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 3868 set thread context of 240 3868 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.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:
abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exeabf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exepid process 396 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe 396 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe 240 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe 240 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exeabf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exeabf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exedescription pid process target process PID 4872 wrote to memory of 396 4872 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 4872 wrote to memory of 396 4872 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 4872 wrote to memory of 396 4872 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 4872 wrote to memory of 396 4872 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 4872 wrote to memory of 396 4872 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 4872 wrote to memory of 396 4872 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 4872 wrote to memory of 396 4872 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 4872 wrote to memory of 396 4872 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 4872 wrote to memory of 396 4872 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 4872 wrote to memory of 396 4872 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 396 wrote to memory of 3688 396 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe icacls.exe PID 396 wrote to memory of 3688 396 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe icacls.exe PID 396 wrote to memory of 3688 396 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe icacls.exe PID 396 wrote to memory of 3868 396 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 396 wrote to memory of 3868 396 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 396 wrote to memory of 3868 396 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 3868 wrote to memory of 240 3868 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 3868 wrote to memory of 240 3868 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 3868 wrote to memory of 240 3868 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 3868 wrote to memory of 240 3868 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 3868 wrote to memory of 240 3868 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 3868 wrote to memory of 240 3868 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 3868 wrote to memory of 240 3868 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 3868 wrote to memory of 240 3868 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 3868 wrote to memory of 240 3868 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe PID 3868 wrote to memory of 240 3868 abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe"C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe"C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe"2⤵
- 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\71d7a078-c93a-40b5-b3b3-5523422e5106" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe"C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exe"C:\Users\Admin\AppData\Local\Temp\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.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
MD56c93f60553415802769aea371043b2a5
SHA177d4fae422f2f5af9d6fbcfacf877a5a35a85d1c
SHA256bfcb18fa2ee3598fdff75b1ecc932c926f011bff60edfa141c41976499c821c5
SHA512ca99fb34beb68dd3e2169edc3c30f964702e209439b4f37b292d6f5e39e1361eeb3251201faf9aa4789db66c23e5d55043a4e9a37e2ea4f319d2cd2951ccd965
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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
MD5b0921dc5e1afa970227bb32d80802631
SHA10e58383f0c72d8e8af3c7611c9ff937fb30c8e16
SHA256b230ccfa1666c3c583b700c55387fe0f9f20aad39c98ec20306f08c9c077e3a3
SHA51214c332cb542b698d7d5fd868167d1d72de7133b3e5e545aec8cc7ad6772e847574e42a80652e228fa1ca308921d6d811ccbe724712903ed7a87d2bd9cc640c58
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
392B
MD58d0a8baa6c818ca46bcbf0686bfb8539
SHA1c2bb86573a3afae05ffe9a39490928c36a1b2a1b
SHA256e95c46c4a49875937deffa7dc4b4759d6a4eb97e86b3564b645941b06bfea985
SHA512fcc4f0729c2d9e12befaa2f0f1e8c9c0704ed7e5b5f7e80571d7c05e0baef1deb647492c130ac09b7c4e4d35a8a7119f844e8b5d05a34ec2f5c499e5c2b804de
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C:\Users\Admin\AppData\Local\71d7a078-c93a-40b5-b3b3-5523422e5106\abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139.exeFilesize
791KB
MD57e757f9cbab5888783a4fd47505e1545
SHA10540526f08a8580dc4ef120b10fad767364af1b1
SHA256abf62e3b81492e2f317745f018f569b36bc8c6322c205d74ff72fda3a0adf139
SHA512da8224fb54b2ff692aed76cd49e2c8bbb8a11ffca58bcf48606e1e8396948693f9107d619c97f019c4e0acd425ed35e3851948d2f41dd84fcb897741b60b6760
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memory/240-29-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/240-28-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/240-35-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/240-22-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/240-36-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/240-34-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/240-32-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/240-37-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/240-27-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/396-5-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/396-6-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/396-3-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/396-4-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/396-19-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4872-2-0x0000000003E00000-0x0000000003F1B000-memory.dmpFilesize
1.1MB
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memory/4872-1-0x00000000023C0000-0x0000000002454000-memory.dmpFilesize
592KB