Analysis
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max time kernel
145s -
max time network
128s -
platform
windows11-21h2_x64 -
resource
win11-20240412-en -
resource tags
arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system -
submitted
15/04/2024, 19:26
Static task
static1
Behavioral task
behavioral1
Sample
55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe
Resource
win10v2004-20240412-en
Behavioral task
behavioral2
Sample
55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe
Resource
win11-20240412-en
General
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Target
55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe
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Size
819KB
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MD5
3e2828108fe38b09181ea613e630edb2
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SHA1
aac8e6bd8bba210aa59621fcc88213e181873ec6
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SHA256
55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76
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SHA512
5e12d56a995c01786f12547c7e5c02e03ed74a27c6f18ccb28d8751875416cf66509ba09e461b78b113241a023a8e69ef4e4a8df73689323cb33173d1b09e558
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SSDEEP
12288:QX4mOhkzKf0FUwTEPDk4R27BQSKzWgux/1GBjYo7P6qifkinhKgDqicMwWtooL:QXNFdaSEWxNF6K/nhKgDNcwooL
Malware Config
Extracted
djvu
http://sajdfue.com/test2/get.php
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extension
.uazq
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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/228-2-0x0000000004C90000-0x0000000004DAB000-memory.dmp family_djvu behavioral2/memory/3580-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3580-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3580-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3580-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/3580-17-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4828-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4828-23-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4828-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4828-30-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4828-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4828-31-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4828-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4828-37-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4828-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4828-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral2/memory/4828-39-0x0000000000400000-0x0000000000537000-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 2204 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-8492748-3358837828-1435473090-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\8139baff-acbe-4a61-a438-c8e174823f4c\\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe\" --AutoStart" 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.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 228 set thread context of 3580 228 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 81 PID 3648 set thread context of 4828 3648 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.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 3580 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 3580 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 4828 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 4828 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 228 wrote to memory of 3580 228 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 81 PID 228 wrote to memory of 3580 228 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 81 PID 228 wrote to memory of 3580 228 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 81 PID 228 wrote to memory of 3580 228 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 81 PID 228 wrote to memory of 3580 228 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 81 PID 228 wrote to memory of 3580 228 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 81 PID 228 wrote to memory of 3580 228 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 81 PID 228 wrote to memory of 3580 228 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 81 PID 228 wrote to memory of 3580 228 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 81 PID 228 wrote to memory of 3580 228 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 81 PID 3580 wrote to memory of 2204 3580 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 82 PID 3580 wrote to memory of 2204 3580 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 82 PID 3580 wrote to memory of 2204 3580 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 82 PID 3580 wrote to memory of 3648 3580 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 83 PID 3580 wrote to memory of 3648 3580 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 83 PID 3580 wrote to memory of 3648 3580 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 83 PID 3648 wrote to memory of 4828 3648 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 86 PID 3648 wrote to memory of 4828 3648 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 86 PID 3648 wrote to memory of 4828 3648 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 86 PID 3648 wrote to memory of 4828 3648 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 86 PID 3648 wrote to memory of 4828 3648 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 86 PID 3648 wrote to memory of 4828 3648 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 86 PID 3648 wrote to memory of 4828 3648 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 86 PID 3648 wrote to memory of 4828 3648 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 86 PID 3648 wrote to memory of 4828 3648 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 86 PID 3648 wrote to memory of 4828 3648 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 86
Processes
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C:\Users\Admin\AppData\Local\Temp\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe"C:\Users\Admin\AppData\Local\Temp\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:228 -
C:\Users\Admin\AppData\Local\Temp\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe"C:\Users\Admin\AppData\Local\Temp\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3580 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\8139baff-acbe-4a61-a438-c8e174823f4c" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:2204
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C:\Users\Admin\AppData\Local\Temp\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe"C:\Users\Admin\AppData\Local\Temp\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3648 -
C:\Users\Admin\AppData\Local\Temp\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe"C:\Users\Admin\AppData\Local\Temp\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:4828
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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
MD53c6a98dff2c8e5d41183fb934602bccf
SHA1389eea4f6c8b9a19dd6efd65b2c979feeb4262a7
SHA2568c5e90026091280487ae42d5c0f266528cacb6de18c7f3d693ecfdb547b06ac8
SHA512fde8e5de812641dc896e8d8182dcf4244670e431f3310aba576f0f330a9d8a4221eb7513005e9755512d0c645cbf164c4c5f8872689d2e52a58b3f39668de8fd
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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
MD5d6ce54e8befb2ffcc06141beb5c4fef5
SHA12045642322333bf2fbe6997900a1d6b729c6d284
SHA2563e0d549a17fb65712518918cf113810972d491c303cda7acc80ff3324d9365b9
SHA512ecf7431c30367c5a475dc160ca37a52c5924bd932e7005f466c3035a7f8c6b9198268a7fb158f0b6d5d22a8e2d68e330987291951c6c8e708b8e6bc57767b074
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD5ec512ccb4ab710e350df0800678de7df
SHA198351a9f7f118bb6c7935d81698da29f7c70838c
SHA2569d582d44f37afa569ecef47bc03a5160bd9823173a0e2cdf4c95db2332f9e04c
SHA5120ba5e506190cb1a7041cb66b92ce1572cf9022006a49d1c0bbe90c790d4c5186b477dbed7fe8699323d333823639a776fdc0542551aa08a8e139076d5a972b55
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C:\Users\Admin\AppData\Local\8139baff-acbe-4a61-a438-c8e174823f4c\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe
Filesize819KB
MD53e2828108fe38b09181ea613e630edb2
SHA1aac8e6bd8bba210aa59621fcc88213e181873ec6
SHA25655b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76
SHA5125e12d56a995c01786f12547c7e5c02e03ed74a27c6f18ccb28d8751875416cf66509ba09e461b78b113241a023a8e69ef4e4a8df73689323cb33173d1b09e558