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Analysis
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max time kernel
43s -
max time network
49s -
platform
windows7_x64 -
resource
win7-20220901-en -
resource tags
arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system -
submitted
01/12/2022, 02:33
Static task
static1
Behavioral task
behavioral1
Sample
81a03f318fdc9afbd9b18e695cba25176e0d26f83584a296419843f83ee20d5f.dll
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
81a03f318fdc9afbd9b18e695cba25176e0d26f83584a296419843f83ee20d5f.dll
Resource
win10v2004-20220901-en
General
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Target
81a03f318fdc9afbd9b18e695cba25176e0d26f83584a296419843f83ee20d5f.dll
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Size
236KB
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MD5
5c58975af78411c3c3e8a3ab4002d959
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SHA1
b0ee9d34c0167705850c159a920ee99eaa98cc6b
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SHA256
81a03f318fdc9afbd9b18e695cba25176e0d26f83584a296419843f83ee20d5f
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SHA512
a1018ac362b467f13ffc1d0d658075c00218d865e3d3e1054ff8bffbba2e4a1b9ebaaa4ea3c3498c387e44defbb6585c6bc85bd02eae123750910d206905c55c
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SSDEEP
1536:1dKaTHN2ymZ0ofa5uQm4V7HG8ldINh+RhFtFftCgpcGO5lPf/XG8GmGwktbJ:1Y4tIQG8XAmbFfaGc1fawk1J
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 Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\sgx = "{8234c090-0abc-5f01-1bcd-0abc48183b52}" rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad rundll32.exe -
Loads dropped DLL 1 IoCs
pid Process 1708 rundll32.exe -
Drops file in System32 directory 4 IoCs
description ioc Process File created C:\Windows\SysWOW64\ftk.dll rundll32.exe File opened for modification C:\Windows\SysWOW64\ftk.dll rundll32.exe File created C:\Windows\SysWOW64\nbs.dll rundll32.exe File opened for modification C:\Windows\SysWOW64\nbs.dll rundll32.exe -
Modifies registry class 5 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{8234c090-0abc-5f01-1bcd-0abc48183b52} rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{8234c090-0abc-5f01-1bcd-0abc48183b52}\ rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{8234c090-0abc-5f01-1bcd-0abc48183b52}\InprocServer32 rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{8234c090-0abc-5f01-1bcd-0abc48183b52}\InprocServer32\ = "C:\\Windows\\SysWow64\\nbs.dll" rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{8234c090-0abc-5f01-1bcd-0abc48183b52}\InprocServer32\ThreadingModel = "Apartment" rundll32.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 1708 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1708 rundll32.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1708 rundll32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 620 wrote to memory of 1708 620 rundll32.exe 27 PID 620 wrote to memory of 1708 620 rundll32.exe 27 PID 620 wrote to memory of 1708 620 rundll32.exe 27 PID 620 wrote to memory of 1708 620 rundll32.exe 27 PID 620 wrote to memory of 1708 620 rundll32.exe 27 PID 620 wrote to memory of 1708 620 rundll32.exe 27 PID 620 wrote to memory of 1708 620 rundll32.exe 27
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\81a03f318fdc9afbd9b18e695cba25176e0d26f83584a296419843f83ee20d5f.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:620 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\81a03f318fdc9afbd9b18e695cba25176e0d26f83584a296419843f83ee20d5f.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:1708
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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