Analysis
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max time kernel
149s -
max time network
151s -
platform
windows11-21h2_x64 -
resource
win11-20240412-en -
resource tags
arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system -
submitted
16/04/2024, 00:10
Static task
static1
Behavioral task
behavioral1
Sample
df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral2
Sample
df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
Resource
win11-20240412-en
General
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Target
df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
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Size
851KB
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MD5
23e17bc0ed5de8c26fc0d371d64c3b2c
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SHA1
a1f40ed9e90a8d55e3a5167b20191291de65b7f5
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SHA256
df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6
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SHA512
018d9cfc145b98ff75d4cbc050733448bef77a0d3bbcbe94c3092fb9f5d1369ba8b4c3889cd6aae25a78adcb58ae131a53a695ede1c3cd2bf0593fe31f56e19b
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SSDEEP
12288:gAjaxsJPuYbIw0JGZUqqLXHHsmfw+fflslYuDZNVKlc:bjaLOILJGfqL3OWflsldDTsi
Malware Config
Extracted
djvu
http://sajdfue.com/test1/get.php
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extension
.uajs
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offline_id
Jx0i3k2ogR5cKxX1evmz0Ex7TUxOUlnbh2dvnIt1
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payload_url
http://sdfjhuz.com/dl/build2.exe
http://sajdfue.com/files/1/build3.exe
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ransomnote
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Signatures
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Detected Djvu ransomware 17 IoCs
resource yara_rule behavioral2/memory/4560-2-0x0000000004CA0000-0x0000000004DBB000-memory.dmp family_djvu behavioral2/memory/3416-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3416-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4136-39-0x0000000000400000-0x0000000000537000-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
pid Process 4876 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-3263309122-2820180308-3568046652-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\caee1f84-39e6-4f6b-87df-f63c9fd36865\\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe\" --AutoStart" df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.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.
flow ioc 1 api.2ip.ua 2 api.2ip.ua 8 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4560 set thread context of 3416 4560 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 80 PID 5052 set thread context of 4136 5052 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 86 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 3416 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 3416 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 4136 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 4136 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 4560 wrote to memory of 3416 4560 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 80 PID 4560 wrote to memory of 3416 4560 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 80 PID 4560 wrote to memory of 3416 4560 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 80 PID 4560 wrote to memory of 3416 4560 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 80 PID 4560 wrote to memory of 3416 4560 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 80 PID 4560 wrote to memory of 3416 4560 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 80 PID 4560 wrote to memory of 3416 4560 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 80 PID 4560 wrote to memory of 3416 4560 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 80 PID 4560 wrote to memory of 3416 4560 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 80 PID 4560 wrote to memory of 3416 4560 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 80 PID 3416 wrote to memory of 4876 3416 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 81 PID 3416 wrote to memory of 4876 3416 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 81 PID 3416 wrote to memory of 4876 3416 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 81 PID 3416 wrote to memory of 5052 3416 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 83 PID 3416 wrote to memory of 5052 3416 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 83 PID 3416 wrote to memory of 5052 3416 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 83 PID 5052 wrote to memory of 4136 5052 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 86 PID 5052 wrote to memory of 4136 5052 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 86 PID 5052 wrote to memory of 4136 5052 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 86 PID 5052 wrote to memory of 4136 5052 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 86 PID 5052 wrote to memory of 4136 5052 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 86 PID 5052 wrote to memory of 4136 5052 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 86 PID 5052 wrote to memory of 4136 5052 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 86 PID 5052 wrote to memory of 4136 5052 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 86 PID 5052 wrote to memory of 4136 5052 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 86 PID 5052 wrote to memory of 4136 5052 df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4560 -
C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3416 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\caee1f84-39e6-4f6b-87df-f63c9fd36865" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4876
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C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:5052 -
C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe"C:\Users\Admin\AppData\Local\Temp\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4136
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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
MD5a796999c503d181cf67725ed32be3bfe
SHA161bed07e1ca6dd7325b65653307671f95cd943bc
SHA25654a3267f8825a4819df16f5448a9829081f9030088a02fa981222b43ec0fb392
SHA5125856964f0d0b6624577ce69751eab308994ef106eaf1de54fa4544caf362f4fbb94f99ceb4f9865746d01a9edce3dcdd685ad3767d761bdbf591ab20ec88081e
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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
MD509d2ec9f18b54b081850fd910f43450a
SHA1e96c8d825fbaa3af0ffc3cd0b8f002ba77fbe6af
SHA256b2f950306537270467db9240417c555d064ce6eba0740b7e50744bc99a4407c5
SHA5125098d1f1b9f6c11f893595d80a70fea5249de949f95845558060c4f56a5f64debb29692b2ccb8ad62431c5351c695f55d378778ec4b75eb5d17977bb2eda057f
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD539fe7b75f674d2c10ae76a07629595ac
SHA165475de3143d46835193cead15a839d82c730231
SHA256d935333f61ef10d6923d6bdf0bb9c663ec574ccaf4ec62fc26e9035fb1dc2212
SHA512c5d11be98a779d956a8a93a737c30f52807dfb49171388cfbd0596e59fef9f1745363370c728a610e13ab3fad3eeb74e2cb931f78ecb81d1a09af9c018b41372
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C:\Users\Admin\AppData\Local\caee1f84-39e6-4f6b-87df-f63c9fd36865\df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6.exe
Filesize851KB
MD523e17bc0ed5de8c26fc0d371d64c3b2c
SHA1a1f40ed9e90a8d55e3a5167b20191291de65b7f5
SHA256df7d6129ceb726b6e01762404f768aa2a4bca2366b7e32d93c1a6ef56d4bd5b6
SHA512018d9cfc145b98ff75d4cbc050733448bef77a0d3bbcbe94c3092fb9f5d1369ba8b4c3889cd6aae25a78adcb58ae131a53a695ede1c3cd2bf0593fe31f56e19b