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
22-05-2024 22:13
Static task
static1
Behavioral task
behavioral1
Sample
f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe
Resource
win10v2004-20240426-en
Behavioral task
behavioral2
Sample
f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe
Resource
win11-20240426-en
General
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Target
f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe
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Size
710KB
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MD5
fb34333020006660704924d0b9bc5c06
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SHA1
a988526eba52058e862e78a8610a4d258b65d6d0
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SHA256
f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3
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SHA512
775ab9f6e9b9623104a3f5d8abbd9a68a8e1c7a9d1a6606e7da879bd72d642df5261cabd7ed41b64726dc0d9d26ede7ca3c1b4666e17283281f132a597eaa06a
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SSDEEP
12288:DTuu0fBQ5KsPyRIfwxw6fEDPzBWb+JAJNJYjxoTCKOYDiFyY5:DTH4WKxKoW6kzMbrJgxQCKdiFP5
Malware Config
Extracted
djvu
http://cajgtus.com/test1/get.php
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extension
.vepi
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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/3724-2-0x00000000049D0000-0x0000000004AEB000-memory.dmp family_djvu behavioral1/memory/4888-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4888-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4888-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4888-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4888-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5032-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5032-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5032-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5032-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5032-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5032-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5032-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5032-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5032-39-0x0000000000400000-0x0000000000537000-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:
f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.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\\c58f3136-f633-4245-8521-c50794ad04a0\\f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe\" --AutoStart" f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.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 5 api.2ip.ua 6 api.2ip.ua 18 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exef89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exedescription pid process target process PID 3724 set thread context of 4888 3724 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3592 set thread context of 5032 3592 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.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:
f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exef89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exepid process 4888 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe 4888 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe 5032 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe 5032 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exef89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exef89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exedescription pid process target process PID 3724 wrote to memory of 4888 3724 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3724 wrote to memory of 4888 3724 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3724 wrote to memory of 4888 3724 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3724 wrote to memory of 4888 3724 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3724 wrote to memory of 4888 3724 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3724 wrote to memory of 4888 3724 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3724 wrote to memory of 4888 3724 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3724 wrote to memory of 4888 3724 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3724 wrote to memory of 4888 3724 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3724 wrote to memory of 4888 3724 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 4888 wrote to memory of 1580 4888 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe icacls.exe PID 4888 wrote to memory of 1580 4888 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe icacls.exe PID 4888 wrote to memory of 1580 4888 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe icacls.exe PID 4888 wrote to memory of 3592 4888 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 4888 wrote to memory of 3592 4888 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 4888 wrote to memory of 3592 4888 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3592 wrote to memory of 5032 3592 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3592 wrote to memory of 5032 3592 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3592 wrote to memory of 5032 3592 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3592 wrote to memory of 5032 3592 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3592 wrote to memory of 5032 3592 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3592 wrote to memory of 5032 3592 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3592 wrote to memory of 5032 3592 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3592 wrote to memory of 5032 3592 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3592 wrote to memory of 5032 3592 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe PID 3592 wrote to memory of 5032 3592 f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe"C:\Users\Admin\AppData\Local\Temp\f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3724 -
C:\Users\Admin\AppData\Local\Temp\f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe"C:\Users\Admin\AppData\Local\Temp\f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4888 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\c58f3136-f633-4245-8521-c50794ad04a0" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1580 -
C:\Users\Admin\AppData\Local\Temp\f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe"C:\Users\Admin\AppData\Local\Temp\f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3592 -
C:\Users\Admin\AppData\Local\Temp\f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe"C:\Users\Admin\AppData\Local\Temp\f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:5032
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
Filesize1KB
MD564c143e9f2a438ddf74501d3b3cc54bf
SHA166b41aabcaa5c364d405c858b85fa7a995f53c72
SHA25602802fa86c2539668fb375ddf8b3ffa5a6c7ad8ae0050c3471dc9fca1275c0ca
SHA5129decfe443630833dfc6c4e2b728c0395d0cbd59a5d868639f300244c4c61df6540b21d33497a8dd4e1947aaef02e4cbc815f53acc21d70ba1653d9492f438e96
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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
MD5e1f219f6011a07921863c6d81416e58d
SHA12400fb53531e5e95a46e0602f9768924d1ca74e6
SHA25626f4f0c22eb883bc18f3badd3e1ddc22f085e6762e8dc93e0813df4db5c95785
SHA51203628b980f1a6628830dd6e9733e2011a1cfd9a368dcdca7018c966e3be0fb9e9ce902c10ba02cb0e1098e6eb68907c96220b62a29c76487b64e15fe6262b255
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD518518b5f3e33d64e5840717b551024e3
SHA1157debef86b502182451a308534beb2e73e748c5
SHA256c4a36775086a82a4d0e1e9b7bf7efa0fdd7f21ae2eab03470ae58d0f4b23c0c2
SHA512e70d1c149811cc3fad616b2f1b34f9d101870d415b0f362133d73aa3301de9b049cb92c2b699f0fcf4cc948ab013710b540413242e019cd4778fa0450b6f82eb
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C:\Users\Admin\AppData\Local\c58f3136-f633-4245-8521-c50794ad04a0\f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3.exe
Filesize710KB
MD5fb34333020006660704924d0b9bc5c06
SHA1a988526eba52058e862e78a8610a4d258b65d6d0
SHA256f89a0b68aaf7c0792c10cf0212e3aeb28bd292dad258c7992c3574c30aab48b3
SHA512775ab9f6e9b9623104a3f5d8abbd9a68a8e1c7a9d1a6606e7da879bd72d642df5261cabd7ed41b64726dc0d9d26ede7ca3c1b4666e17283281f132a597eaa06a