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Analysis
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max time kernel
12s -
max time network
46s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
01/12/2022, 21:12
Static task
static1
Behavioral task
behavioral1
Sample
90cd43a683f8568a4c0f0c007634cb7eef3ec7ce9a28506f49d46232d5c0d6e1.dll
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
90cd43a683f8568a4c0f0c007634cb7eef3ec7ce9a28506f49d46232d5c0d6e1.dll
Resource
win10v2004-20220812-en
General
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Target
90cd43a683f8568a4c0f0c007634cb7eef3ec7ce9a28506f49d46232d5c0d6e1.dll
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Size
236KB
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MD5
361ef054147f6f1a507fc2be6e213029
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SHA1
f6b425c500557bfc0af337f61c572c8f2b790682
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SHA256
90cd43a683f8568a4c0f0c007634cb7eef3ec7ce9a28506f49d46232d5c0d6e1
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SHA512
312e7c7b8ff6f0835398c23d141d2c6d100acb9d1cf361e517d2e4aec09ff5f762471d54d6e40f6355b09a726f4287bdc386236d92f78b54624611d4b581bd87
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SSDEEP
3072:SeqmgHwlaazN9U3J+P0wFp+bLrt2wkkIM:+Qj9U3jwO3rt5/
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\boawxdl = "{3ac8d356-b240-0795-c351-b2405bde954e}" rundll32.exe -
Loads dropped DLL 1 IoCs
pid Process 1516 rundll32.exe -
Drops file in System32 directory 4 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\obnjkqy.dll rundll32.exe File created C:\Windows\SysWOW64\wjvrsyg.dll rundll32.exe File opened for modification C:\Windows\SysWOW64\wjvrsyg.dll rundll32.exe File created C:\Windows\SysWOW64\obnjkqy.dll rundll32.exe -
Modifies registry class 5 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3ac8d356-b240-0795-c351-b2405bde954e}\InprocServer32\ThreadingModel = "Apartment" rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3ac8d356-b240-0795-c351-b2405bde954e} rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3ac8d356-b240-0795-c351-b2405bde954e}\ rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3ac8d356-b240-0795-c351-b2405bde954e}\InprocServer32 rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{3ac8d356-b240-0795-c351-b2405bde954e}\InprocServer32\ = "C:\\Windows\\SysWow64\\wjvrsyg.dll" rundll32.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 1516 rundll32.exe 1516 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1516 rundll32.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1516 rundll32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 956 wrote to memory of 1516 956 rundll32.exe 28 PID 956 wrote to memory of 1516 956 rundll32.exe 28 PID 956 wrote to memory of 1516 956 rundll32.exe 28 PID 956 wrote to memory of 1516 956 rundll32.exe 28 PID 956 wrote to memory of 1516 956 rundll32.exe 28 PID 956 wrote to memory of 1516 956 rundll32.exe 28 PID 956 wrote to memory of 1516 956 rundll32.exe 28
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\90cd43a683f8568a4c0f0c007634cb7eef3ec7ce9a28506f49d46232d5c0d6e1.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:956 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\90cd43a683f8568a4c0f0c007634cb7eef3ec7ce9a28506f49d46232d5c0d6e1.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:1516
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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