Analysis
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max time kernel
145s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
22-05-2024 20:08
Static task
static1
Behavioral task
behavioral1
Sample
4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
Resource
win10v2004-20240226-en
Behavioral task
behavioral2
Sample
4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
Resource
win11-20240426-en
General
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Target
4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
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Size
710KB
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MD5
fda708b84341e23d935dbbd3328d324b
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SHA1
9ba9f633af7afe8b69f81c50beb2dda944938304
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SHA256
4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82
-
SHA512
345d7bfaa645b4bdc91b69cf4f1d5a1c3cbc64cd48e3db1e2a90c6a7074893e6951e13623094fe12b79cd1dcd8d2ba7dfd83c76d31f61fe4c642520b254c6a56
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SSDEEP
12288:6tKgwZikNmzG1pZawqSc8ZjbZb/Xoik/8crs9ETWiGsn4IcsksDHy:6tpCe4K8c8ZXZbQd/8cmETW19k
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
-
ransomnote
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Signatures
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Detected Djvu ransomware 16 IoCs
Processes:
resource yara_rule behavioral1/memory/2260-2-0x0000000004B10000-0x0000000004C2B000-memory.dmp family_djvu behavioral1/memory/4152-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4152-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4152-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4152-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4152-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5404-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5404-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5404-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5404-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5404-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5404-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5404-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5404-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5404-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/5404-39-0x0000000000400000-0x0000000000537000-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:
4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe -
Modifies file permissions 1 TTPs 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
Processes:
4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\9be106ad-a5d7-4952-900d-ac74f6c02cbf\\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe\" --AutoStart" 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.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 20 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
Processes:
4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exedescription pid process target process PID 2260 set thread context of 4152 2260 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2016 set thread context of 5404 2016 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.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:
4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exepid process 4152 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4152 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 5404 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 5404 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe -
Suspicious use of WriteProcessMemory 26 IoCs
Processes:
4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exedescription pid process target process PID 2260 wrote to memory of 4152 2260 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2260 wrote to memory of 4152 2260 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2260 wrote to memory of 4152 2260 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2260 wrote to memory of 4152 2260 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2260 wrote to memory of 4152 2260 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2260 wrote to memory of 4152 2260 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2260 wrote to memory of 4152 2260 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2260 wrote to memory of 4152 2260 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2260 wrote to memory of 4152 2260 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2260 wrote to memory of 4152 2260 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 4152 wrote to memory of 700 4152 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe icacls.exe PID 4152 wrote to memory of 700 4152 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe icacls.exe PID 4152 wrote to memory of 700 4152 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe icacls.exe PID 4152 wrote to memory of 2016 4152 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 4152 wrote to memory of 2016 4152 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 4152 wrote to memory of 2016 4152 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2016 wrote to memory of 5404 2016 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2016 wrote to memory of 5404 2016 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2016 wrote to memory of 5404 2016 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2016 wrote to memory of 5404 2016 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2016 wrote to memory of 5404 2016 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2016 wrote to memory of 5404 2016 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2016 wrote to memory of 5404 2016 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2016 wrote to memory of 5404 2016 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2016 wrote to memory of 5404 2016 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe PID 2016 wrote to memory of 5404 2016 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe 4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2260 -
C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4152 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\9be106ad-a5d7-4952-900d-ac74f6c02cbf" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:700 -
C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2016 -
C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe"C:\Users\Admin\AppData\Local\Temp\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:5404
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1324 --field-trial-handle=2280,i,1836084024518340990,18250262151825427757,262144 --variations-seed-version /prefetch:81⤵PID:5812
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_3A89246FB90C5EE6620004F1AE0EB0EAFilesize
1KB
MD56728aea2631b86a76c237508d8ba9b55
SHA17a670f95cac088313f7558869162fe01c6dc0ec9
SHA256e1dd7380c6df33cd5702b032e0e359029d3ef7630f06ceb42cfdc154fd0baf7b
SHA512533080cd1ec40b8530cad5c9914e0a5156d225f7392283ed2607eda4f1db4a6930002274060ed9130a6f634222c2e15818e16a50579cfe7f5274d028d31212f5
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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
MD54adbbd5b0ba6f8029efe0e89374c4042
SHA101fa3ffdb795257863cf85367c2be220f3935e92
SHA256782ba656165e436506b2b7bc9a48bec132b4707a6b16d8e1dd69628670caaa83
SHA5126c8a0696fcef4ec64d99ce2a0cc752832e3101743e1a6ac8914e25ebac06b51dd3f08158963f17bb7eb68820e574ee9a6bb0ac456ef736ceaaf4a50f816a293d
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464Filesize
392B
MD578f37a88570fee69422284cfe2b6647d
SHA135fd4afd34757fbfdc467e36e98aad4f55727316
SHA256bf5e8cb8a9af124b81b08dcd34e2e3b141a272531b9e6d5ecc3ff023b25e9820
SHA5123801e7eaf4bd6e76258d5fa2dcdd588a4494e796b719b5b07604e81f1bc5276180a3a02333bd91ef379c41d9034958d81134dd485cb56715824788e21e1d6135
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C:\Users\Admin\AppData\Local\9be106ad-a5d7-4952-900d-ac74f6c02cbf\4def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82.exeFilesize
710KB
MD5fda708b84341e23d935dbbd3328d324b
SHA19ba9f633af7afe8b69f81c50beb2dda944938304
SHA2564def6b165636f77785a33c3b18117d74f5e930701dfe20f2bfb11ddb24924b82
SHA512345d7bfaa645b4bdc91b69cf4f1d5a1c3cbc64cd48e3db1e2a90c6a7074893e6951e13623094fe12b79cd1dcd8d2ba7dfd83c76d31f61fe4c642520b254c6a56
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memory/2260-2-0x0000000004B10000-0x0000000004C2B000-memory.dmpFilesize
1.1MB
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memory/2260-1-0x0000000004A70000-0x0000000004B0A000-memory.dmpFilesize
616KB
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memory/4152-6-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/4152-4-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/4152-3-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/4152-19-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/4152-5-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/5404-29-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/5404-24-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
-
memory/5404-22-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/5404-30-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/5404-31-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/5404-34-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/5404-37-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/5404-36-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/5404-38-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB
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memory/5404-39-0x0000000000400000-0x0000000000537000-memory.dmpFilesize
1.2MB