Analysis
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max time kernel
143s -
max time network
114s -
platform
windows10-2004_x64 -
resource
win10v2004-20240412-en -
resource tags
arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-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 behavioral1/memory/1208-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1208-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1208-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/1208-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4440-2-0x0000000004A70000-0x0000000004B8B000-memory.dmp family_djvu behavioral1/memory/1208-15-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-20-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-21-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-22-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-27-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-28-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-29-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-35-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-32-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-36-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/2600-37-0x0000000000400000-0x0000000000537000-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.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\Control Panel\International\Geo\Nation 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 1224 icacls.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2177723727-746291240-1644359950-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\91cdf799-50a1-4918-9445-81594792f183\\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 7 api.2ip.ua 8 api.2ip.ua 25 api.2ip.ua -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 4440 set thread context of 1208 4440 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 88 PID 2168 set thread context of 2600 2168 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 92 -
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 1208 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 1208 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 2600 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 2600 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe -
Suspicious use of WriteProcessMemory 26 IoCs
description pid Process procid_target PID 4440 wrote to memory of 1208 4440 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 88 PID 4440 wrote to memory of 1208 4440 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 88 PID 4440 wrote to memory of 1208 4440 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 88 PID 4440 wrote to memory of 1208 4440 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 88 PID 4440 wrote to memory of 1208 4440 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 88 PID 4440 wrote to memory of 1208 4440 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 88 PID 4440 wrote to memory of 1208 4440 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 88 PID 4440 wrote to memory of 1208 4440 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 88 PID 4440 wrote to memory of 1208 4440 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 88 PID 4440 wrote to memory of 1208 4440 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 88 PID 1208 wrote to memory of 1224 1208 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 89 PID 1208 wrote to memory of 1224 1208 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 89 PID 1208 wrote to memory of 1224 1208 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 89 PID 1208 wrote to memory of 2168 1208 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 90 PID 1208 wrote to memory of 2168 1208 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 90 PID 1208 wrote to memory of 2168 1208 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 90 PID 2168 wrote to memory of 2600 2168 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 92 PID 2168 wrote to memory of 2600 2168 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 92 PID 2168 wrote to memory of 2600 2168 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 92 PID 2168 wrote to memory of 2600 2168 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 92 PID 2168 wrote to memory of 2600 2168 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 92 PID 2168 wrote to memory of 2600 2168 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 92 PID 2168 wrote to memory of 2600 2168 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 92 PID 2168 wrote to memory of 2600 2168 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 92 PID 2168 wrote to memory of 2600 2168 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 92 PID 2168 wrote to memory of 2600 2168 55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe 92
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:4440 -
C:\Users\Admin\AppData\Local\Temp\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe"C:\Users\Admin\AppData\Local\Temp\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1208 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\91cdf799-50a1-4918-9445-81594792f183" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:1224
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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:2168 -
C:\Users\Admin\AppData\Local\Temp\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe"C:\Users\Admin\AppData\Local\Temp\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
PID:2600
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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_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
MD5e91ab60736e7fd57b14a1be02a45fa57
SHA143364689a7c8afd6207360d0f7733a83591dd32b
SHA256c3cf903404938336567945b3ba459c44cb4e9c96bcf5fd472a7be347b59508ed
SHA512c98abf7f546338c5d8bf69da7218aa0e6e640d7021947e736942547a2085c85320ca6e9f220e9f1d77b2c1c995e698ae36cfc56ef844663ebf8d0738f33dca1a
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD59885af92b72b49ec7ee1e9450de91e31
SHA142ece4c7ab99c0bd30bd9ac2302cedd14191ce8a
SHA256702b73212d82d94e3e0e0b02ed560c83409640d3fda200c2e21f67d37c854c1e
SHA51260a3d96499bad3b41e8e60ad580d47d8abc8d790e62ca46313564313a23fcdb4423e4e4f3e394b080cbcd65ff3174b14de08265f766260812f098039ecf250db
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C:\Users\Admin\AppData\Local\91cdf799-50a1-4918-9445-81594792f183\55b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76.exe
Filesize819KB
MD53e2828108fe38b09181ea613e630edb2
SHA1aac8e6bd8bba210aa59621fcc88213e181873ec6
SHA25655b578abeac4dc12620a26126730aeb33e198f1d3ed5177682505760c0fcde76
SHA5125e12d56a995c01786f12547c7e5c02e03ed74a27c6f18ccb28d8751875416cf66509ba09e461b78b113241a023a8e69ef4e4a8df73689323cb33173d1b09e558