Analysis
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max time kernel
149s -
max time network
136s -
platform
windows10-1703_x64 -
resource
win10-20231020-en -
resource tags
arch:x64arch:x86image:win10-20231020-enlocale:en-usos:windows10-1703-x64system -
submitted
01/11/2023, 00:20
Static task
static1
Behavioral task
behavioral1
Sample
8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe
Resource
win10-20231020-en
General
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Target
8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe
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Size
685KB
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MD5
3bbe6a480bcb8cc48da997d0d6e20942
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SHA1
8e14c19ed22968d2ce2f0bc7be20e17da53a32a5
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SHA256
8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b
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SHA512
ab06afc6d6c43da63885148326aa57c7999d7ed8393dcd6e06e067373553929169daadd366a77853b5a4998ebe578161c0dd9d6106fc2f89d9d7bd3dfd5a0b68
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SSDEEP
12288:Z9VQ4e1R3m91QB/dI+tnBXLlgVlcbbEYOTg6yTUa0frpMZAny1yeX62B1ROM/fvU:Vy1R3mQ1JtB2lcbbHSnA501aAyZX62BQ
Malware Config
Extracted
djvu
http://zexeq.com/test1/get.php
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extension
.ppvs
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offline_id
phJtdHo970vyx7vwlYG00OakDR75RuJz7NXDArt1
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payload_url
http://colisumy.com/dl/build2.exe
http://zexeq.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/4500-2-0x0000000002570000-0x000000000268B000-memory.dmp family_djvu behavioral1/memory/4988-3-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4988-4-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4988-5-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4988-6-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4988-19-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4568-22-0x0000000002320000-0x00000000023BF000-memory.dmp family_djvu behavioral1/memory/4952-24-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4952-25-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4952-26-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4952-33-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4952-34-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4952-38-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4952-41-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4952-40-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4952-42-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu behavioral1/memory/4952-64-0x0000000000400000-0x0000000000537000-memory.dmp family_djvu -
Djvu Ransomware
Ransomware which is a variant of the STOP family.
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Downloads MZ/PE file
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Executes dropped EXE 2 IoCs
pid Process 4880 build2.exe 2112 build2.exe -
Loads dropped DLL 2 IoCs
pid Process 2112 build2.exe 2112 build2.exe -
Modifies file permissions 1 TTPs 1 IoCs
pid Process 4168 icacls.exe -
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
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Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2640874492-649017405-3475600720-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\35bebada-8b42-4505-9117-7c7ddf9ee4b6\\8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe\" --AutoStart" 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe -
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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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 2 api.2ip.ua 10 api.2ip.ua 1 api.2ip.ua -
Suspicious use of SetThreadContext 3 IoCs
description pid Process procid_target PID 4500 set thread context of 4988 4500 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 71 PID 4568 set thread context of 4952 4568 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 75 PID 4880 set thread context of 2112 4880 build2.exe 77 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
description ioc Process Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 build2.exe Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString build2.exe -
Delays execution with timeout.exe 1 IoCs
pid Process 1420 timeout.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 4988 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 4988 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 4952 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 4952 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 2112 build2.exe 2112 build2.exe -
Suspicious use of WriteProcessMemory 44 IoCs
description pid Process procid_target PID 4500 wrote to memory of 4988 4500 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 71 PID 4500 wrote to memory of 4988 4500 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 71 PID 4500 wrote to memory of 4988 4500 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 71 PID 4500 wrote to memory of 4988 4500 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 71 PID 4500 wrote to memory of 4988 4500 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 71 PID 4500 wrote to memory of 4988 4500 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 71 PID 4500 wrote to memory of 4988 4500 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 71 PID 4500 wrote to memory of 4988 4500 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 71 PID 4500 wrote to memory of 4988 4500 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 71 PID 4500 wrote to memory of 4988 4500 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 71 PID 4988 wrote to memory of 4168 4988 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 72 PID 4988 wrote to memory of 4168 4988 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 72 PID 4988 wrote to memory of 4168 4988 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 72 PID 4988 wrote to memory of 4568 4988 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 73 PID 4988 wrote to memory of 4568 4988 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 73 PID 4988 wrote to memory of 4568 4988 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 73 PID 4568 wrote to memory of 4952 4568 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 75 PID 4568 wrote to memory of 4952 4568 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 75 PID 4568 wrote to memory of 4952 4568 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 75 PID 4568 wrote to memory of 4952 4568 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 75 PID 4568 wrote to memory of 4952 4568 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 75 PID 4568 wrote to memory of 4952 4568 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 75 PID 4568 wrote to memory of 4952 4568 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 75 PID 4568 wrote to memory of 4952 4568 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 75 PID 4568 wrote to memory of 4952 4568 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 75 PID 4568 wrote to memory of 4952 4568 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 75 PID 4952 wrote to memory of 4880 4952 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 76 PID 4952 wrote to memory of 4880 4952 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 76 PID 4952 wrote to memory of 4880 4952 8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe 76 PID 4880 wrote to memory of 2112 4880 build2.exe 77 PID 4880 wrote to memory of 2112 4880 build2.exe 77 PID 4880 wrote to memory of 2112 4880 build2.exe 77 PID 4880 wrote to memory of 2112 4880 build2.exe 77 PID 4880 wrote to memory of 2112 4880 build2.exe 77 PID 4880 wrote to memory of 2112 4880 build2.exe 77 PID 4880 wrote to memory of 2112 4880 build2.exe 77 PID 4880 wrote to memory of 2112 4880 build2.exe 77 PID 4880 wrote to memory of 2112 4880 build2.exe 77 PID 2112 wrote to memory of 300 2112 build2.exe 79 PID 2112 wrote to memory of 300 2112 build2.exe 79 PID 2112 wrote to memory of 300 2112 build2.exe 79 PID 300 wrote to memory of 1420 300 cmd.exe 81 PID 300 wrote to memory of 1420 300 cmd.exe 81 PID 300 wrote to memory of 1420 300 cmd.exe 81
Processes
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C:\Users\Admin\AppData\Local\Temp\8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe"C:\Users\Admin\AppData\Local\Temp\8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4500 -
C:\Users\Admin\AppData\Local\Temp\8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe"C:\Users\Admin\AppData\Local\Temp\8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe"2⤵
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4988 -
C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\35bebada-8b42-4505-9117-7c7ddf9ee4b6" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
PID:4168
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C:\Users\Admin\AppData\Local\Temp\8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe"C:\Users\Admin\AppData\Local\Temp\8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4568 -
C:\Users\Admin\AppData\Local\Temp\8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe"C:\Users\Admin\AppData\Local\Temp\8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4952 -
C:\Users\Admin\AppData\Local\9c58f307-01b1-47ac-8a13-f1510f4bef61\build2.exe"C:\Users\Admin\AppData\Local\9c58f307-01b1-47ac-8a13-f1510f4bef61\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4880 -
C:\Users\Admin\AppData\Local\9c58f307-01b1-47ac-8a13-f1510f4bef61\build2.exe"C:\Users\Admin\AppData\Local\9c58f307-01b1-47ac-8a13-f1510f4bef61\build2.exe"6⤵
- Executes dropped EXE
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2112 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\system32\cmd.exe" /c timeout /t 5 & del /f /q "C:\Users\Admin\AppData\Local\9c58f307-01b1-47ac-8a13-f1510f4bef61\build2.exe" & del "C:\ProgramData\*.dll"" & exit7⤵
- Suspicious use of WriteProcessMemory
PID:300 -
C:\Windows\SysWOW64\timeout.exetimeout /t 58⤵
- Delays execution with timeout.exe
PID:1420
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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
MD51556fc38a0db5b0c05c4277a624515de
SHA1ce49652166b3bd3820b2cdbe7cfbba78eabbf9f0
SHA256da82afcf50861e89ff8bff80ee852bb4c937b8b39ee2d8b10bff462afe3d0372
SHA512552f08e28cf217126f97338798f8036dc49501f7f09421afe975632faf2b78db3a3d3831f98b7f030285e960b6faa5c5bb41a339c4e6fa1473d3b3479bbaf1e0
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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
MD5999a8b9bce2f0fd279bf70a1ddfe0889
SHA1a0e08d82ecbc4c2bc782085b1cad731d68ac0887
SHA256a0704fb8c8bad6a5fc955e629a7eda571d9719826e907825a965c53380ac9528
SHA5120bbced729ddfe632500e1d62e977a649c2f6456d5106fd89b641637ccef0888e76625e2d82241b1ed6a05c5392175220ceef7c8e41342d16d25a9e72acbf8f86
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C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
Filesize392B
MD53449cd637618521616389884cc1142f9
SHA10632b5b571df90a8c07f0238754e365840a69649
SHA256fa602bc0642433948ef4df53222cf278ceaa49765bbc4429775923a5e60d4391
SHA51226aebf91d15bbef2e0c1ee1a84d40cd5a1f29381da5e0473b4abb1a9b663669efdd05879b791332579ab1d7a7a6c2076241ef0c92ea94e1a3400acce99ef4674
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C:\Users\Admin\AppData\Local\35bebada-8b42-4505-9117-7c7ddf9ee4b6\8ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b.exe
Filesize685KB
MD53bbe6a480bcb8cc48da997d0d6e20942
SHA18e14c19ed22968d2ce2f0bc7be20e17da53a32a5
SHA2568ecb5aab9d8af5e3a0f43c251525332ffa2342ce1d8fd37c751874763f44a12b
SHA512ab06afc6d6c43da63885148326aa57c7999d7ed8393dcd6e06e067373553929169daadd366a77853b5a4998ebe578161c0dd9d6106fc2f89d9d7bd3dfd5a0b68
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Filesize
206KB
MD589444ecbcfe1a5a86eea4bcf7d8aef04
SHA12909ac2035636fb1461b19e31b985f324f866a8e
SHA2562b51eb4478d4d3518659d1fe706408aaf2076efb5445524ace766047b50d0789
SHA512df42cb8d0afab3fd8249cdc5a96fb5766954991a86406b1f6862ec54a2c42586d2a6c1c00af68d9da455ea902449b0c96fe82df858b4bc5fad15883e73783bde
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Filesize
206KB
MD589444ecbcfe1a5a86eea4bcf7d8aef04
SHA12909ac2035636fb1461b19e31b985f324f866a8e
SHA2562b51eb4478d4d3518659d1fe706408aaf2076efb5445524ace766047b50d0789
SHA512df42cb8d0afab3fd8249cdc5a96fb5766954991a86406b1f6862ec54a2c42586d2a6c1c00af68d9da455ea902449b0c96fe82df858b4bc5fad15883e73783bde
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Filesize
206KB
MD589444ecbcfe1a5a86eea4bcf7d8aef04
SHA12909ac2035636fb1461b19e31b985f324f866a8e
SHA2562b51eb4478d4d3518659d1fe706408aaf2076efb5445524ace766047b50d0789
SHA512df42cb8d0afab3fd8249cdc5a96fb5766954991a86406b1f6862ec54a2c42586d2a6c1c00af68d9da455ea902449b0c96fe82df858b4bc5fad15883e73783bde
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Filesize
1KB
MD5cc6901a2665a3928d7547895d62e1bfd
SHA1552303030ba53828fe3cdf725c44e84494f16de5
SHA2561ef93ea88586bd708e6f8fe05622a4d7d481c327a822d9cc795ee6f4f31636d8
SHA5129646389573b831dcdc65cdf83fdb9d7d715140050d55928dfaf3f31e23e2186bdef133c5a009039b80feb36e37d260823409636b5aeeea271dda30ab0e74539f
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Filesize
593KB
MD5c8fd9be83bc728cc04beffafc2907fe9
SHA195ab9f701e0024cedfbd312bcfe4e726744c4f2e
SHA256ba06a6ee0b15f5be5c4e67782eec8b521e36c107a329093ec400fe0404eb196a
SHA512fbb446f4a27ef510e616caad52945d6c9cc1fd063812c41947e579ec2b54df57c6dc46237ded80fca5847f38cbe1747a6c66a13e2c8c19c664a72be35eb8b040
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Filesize
2.0MB
MD51cc453cdf74f31e4d913ff9c10acdde2
SHA16e85eae544d6e965f15fa5c39700fa7202f3aafe
SHA256ac5c92fe6c51cfa742e475215b83b3e11a4379820043263bf50d4068686c6fa5
SHA512dd9ff4e06b00dc831439bab11c10e9b2ae864ea6e780d3835ea7468818f35439f352ef137da111efcdf2bb6465f6ca486719451bf6cf32c6a4420a56b1d64571