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Analysis
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max time kernel
149s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240704-en -
resource tags
arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system -
submitted
06/07/2024, 12:38
Behavioral task
behavioral1
Sample
087f743efe2e8420ab817c555a232e50N.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
087f743efe2e8420ab817c555a232e50N.exe
Resource
win10v2004-20240704-en
General
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Target
087f743efe2e8420ab817c555a232e50N.exe
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Size
678KB
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MD5
087f743efe2e8420ab817c555a232e50
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SHA1
a40fc725d117ae3350474615869e1de83f2ea09b
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SHA256
940057ae2dd2e1532eebfd06c07b3c50344f27922692479076e267443a9edc17
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SHA512
31623e2d8414a1596c23cbd9fd82d6f9e5bf5ab981351de67b1d4c49131420dadee851300953dcb986b4b27f23fd2320afb21b8c805983266a4601833e900002
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SSDEEP
12288:7tKe6Zv23YLVFhBsC8iFHs+hsuQXIQVRpVnl3Bg5oiNaYzHvAR8:v6Zv2ivhBVnFvh5Q44+iiUKIa
Malware Config
Signatures
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Boot or Logon Autostart Execution: Active Setup 2 TTPs 2 IoCs
Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{C268A2CF-8B9A-11D5-EBA1-F78EEEEEE983}\StubPath = "msypk32.exe" 087f743efe2e8420ab817c555a232e50N.exe Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{C268A2CF-8B9A-11D5-EBA1-F78EEEEEE983} 087f743efe2e8420ab817c555a232e50N.exe -
Modifies system executable filetype association 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*" 087f743efe2e8420ab817c555a232e50N.exe -
resource yara_rule behavioral2/memory/1824-0-0x0000000000400000-0x0000000000439000-memory.dmp upx behavioral2/files/0x00080000000234a0-5.dat upx behavioral2/memory/1824-7-0x0000000000400000-0x0000000000439000-memory.dmp upx -
Adds Run key to start application 2 TTPs 2 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2753856825-3907105642-1818461144-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe" 087f743efe2e8420ab817c555a232e50N.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe" 087f743efe2e8420ab817c555a232e50N.exe -
Drops file in System32 directory 6 IoCs
description ioc Process File created C:\Windows\SysWOW64\msypk32.exe 087f743efe2e8420ab817c555a232e50N.exe File opened for modification C:\Windows\SysWOW64\msypk32.exe 087f743efe2e8420ab817c555a232e50N.exe File created C:\Windows\SysWOW64\concp32.exe 087f743efe2e8420ab817c555a232e50N.exe File opened for modification C:\Windows\SysWOW64\concp32.exe 087f743efe2e8420ab817c555a232e50N.exe File created C:\Windows\SysWOW64\vcl32.exe 087f743efe2e8420ab817c555a232e50N.exe File opened for modification C:\Windows\SysWOW64\vcl32.exe 087f743efe2e8420ab817c555a232e50N.exe -
Program crash 1 IoCs
pid pid_target Process procid_target 3720 1824 WerFault.exe 81 -
Modifies registry class 5 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C268A2CF-8B9A-11D5-EBA1-F78EEEEEE983}\InprocServer32 087f743efe2e8420ab817c555a232e50N.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C268A2CF-8B9A-11D5-EBA1-F78EEEEEE983}\sm = ebb5525fa3bcf9422c8ff945977d6af9 087f743efe2e8420ab817c555a232e50N.exe Set value (data) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C268A2CF-8B9A-11D5-EBA1-F78EEEEEE983}\ax = aba3935dd29131c6015735b28e6c7b41 087f743efe2e8420ab817c555a232e50N.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*" 087f743efe2e8420ab817c555a232e50N.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C268A2CF-8B9A-11D5-EBA1-F78EEEEEE983} 087f743efe2e8420ab817c555a232e50N.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 1824 087f743efe2e8420ab817c555a232e50N.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\087f743efe2e8420ab817c555a232e50N.exe"C:\Users\Admin\AppData\Local\Temp\087f743efe2e8420ab817c555a232e50N.exe"1⤵
- Boot or Logon Autostart Execution: Active Setup
- Modifies system executable filetype association
- Adds Run key to start application
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
PID:1824 -
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1824 -s 7042⤵
- Program crash
PID:3720
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C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 1824 -ip 18241⤵PID:1612
Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Active Setup
1Registry Run Keys / Startup Folder
1Event Triggered Execution
1Change Default File Association
1Replay Monitor
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Downloads
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Filesize
684KB
MD573a7235ae61399d77dd2168a96f657b0
SHA114cc5ad83fe9069656e2328df262367a2c699ce8
SHA2563764d2746ceea8958b5cb2fedc779be6def58c3b22c459b008aa82bcf6c508fd
SHA5122fd37fc11e514b4b93a74923a3bd0f3e4fe066ad43968abe7099bf190f88c4bd15b048225c245d4cf53975ad2cb619cd66f8801ab7e4b15f3dfb801ceb25ee2a