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Analysis
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max time kernel
45s -
max time network
51s -
platform
windows7_x64 -
resource
win7-20220901-en -
resource tags
arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system -
submitted
03/12/2022, 11:41
Static task
static1
Behavioral task
behavioral1
Sample
e9751abc05c3080651b583ff5f23767870c19590e5b3e7d5753879e57b311af6.dll
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
e9751abc05c3080651b583ff5f23767870c19590e5b3e7d5753879e57b311af6.dll
Resource
win10v2004-20220812-en
General
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Target
e9751abc05c3080651b583ff5f23767870c19590e5b3e7d5753879e57b311af6.dll
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Size
236KB
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MD5
fd806b38b3d709df59db61825106208b
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SHA1
b8b71e9e0d3b7df2878215644bf1a72851930455
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SHA256
e9751abc05c3080651b583ff5f23767870c19590e5b3e7d5753879e57b311af6
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SHA512
9ff9d5eedc6123d2151fa29b818ca80291491fd1f8fe1e2dc43fdba3a01e8ec61600ddcfdca35d6dd7ccfe2a6e93b83f7e6c7f5aa64357fd4f7187801a59c39a
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SSDEEP
1536:Iguo2K86vta10RJQYPIHL+D5IWhxRh/Ci4ucg3/+k5ltr+DRPG8Gz7wk+cQvMf:Go256vS0RJAL+lHPKi40+66iwkD0U
Malware Config
Signatures
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Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\hftwukn = "{73d002fe-fb58-40ad-0c69-fb588a763328}" rundll32.exe -
Loads dropped DLL 1 IoCs
pid Process 1356 rundll32.exe -
Drops file in System32 directory 4 IoCs
description ioc Process File created C:\Windows\SysWOW64\caorpfi.dll rundll32.exe File opened for modification C:\Windows\SysWOW64\caorpfi.dll rundll32.exe File created C:\Windows\SysWOW64\usgjhxa.dll rundll32.exe File opened for modification C:\Windows\SysWOW64\usgjhxa.dll rundll32.exe -
Modifies registry class 5 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{73d002fe-fb58-40ad-0c69-fb588a763328}\ rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{73d002fe-fb58-40ad-0c69-fb588a763328}\InprocServer32 rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{73d002fe-fb58-40ad-0c69-fb588a763328}\InprocServer32\ = "C:\\Windows\\SysWow64\\caorpfi.dll" rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{73d002fe-fb58-40ad-0c69-fb588a763328}\InprocServer32\ThreadingModel = "Apartment" rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{73d002fe-fb58-40ad-0c69-fb588a763328} rundll32.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 1356 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1356 rundll32.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1356 rundll32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 1308 wrote to memory of 1356 1308 rundll32.exe 27 PID 1308 wrote to memory of 1356 1308 rundll32.exe 27 PID 1308 wrote to memory of 1356 1308 rundll32.exe 27 PID 1308 wrote to memory of 1356 1308 rundll32.exe 27 PID 1308 wrote to memory of 1356 1308 rundll32.exe 27 PID 1308 wrote to memory of 1356 1308 rundll32.exe 27 PID 1308 wrote to memory of 1356 1308 rundll32.exe 27
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\e9751abc05c3080651b583ff5f23767870c19590e5b3e7d5753879e57b311af6.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:1308 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\e9751abc05c3080651b583ff5f23767870c19590e5b3e7d5753879e57b311af6.dll,#12⤵
- Adds autorun key to be loaded by Explorer.exe on startup
- Loads dropped DLL
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1356
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
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Filesize
625KB
MD595e2376b3323f062eb562b8586d0f14a
SHA1453d4c3bf4a489433b593420a37bbffb7749875a
SHA256bd3fa8750123d00aa0967fba44372c46ea002681da9c9b77a4f9261553e26017
SHA512b898603d07a49237e4dfc6872d5caa7616bae1258926f10e66c4d3f0d81cccefac1e844395b65bb1f308fbc022061b52e51f60658d0a546c04b365b3428cc87d