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Analysis
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max time kernel
22s -
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, 02:45
Static task
static1
Behavioral task
behavioral1
Sample
7ef089a28ad062c7514e8a31ba66f345343938df9c789eb2b58c29919833e7b9.dll
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
7ef089a28ad062c7514e8a31ba66f345343938df9c789eb2b58c29919833e7b9.dll
Resource
win10v2004-20220812-en
General
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Target
7ef089a28ad062c7514e8a31ba66f345343938df9c789eb2b58c29919833e7b9.dll
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Size
236KB
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MD5
6c97971f0b4a25ce0b2db72eef6b7cd0
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SHA1
90601dde36c25e879abc4a080dd15e4d1c2da2d8
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SHA256
7ef089a28ad062c7514e8a31ba66f345343938df9c789eb2b58c29919833e7b9
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SHA512
b85db7cfc387343355e69f1f00fc8157ffda448de91dffdeca24643b150f89d7beb10ab02019716c5207f006d0a8938961b6473f1715e1fe9e931be85b6be7d3
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SSDEEP
3072:SeqmgHwlaazN9U3J+P0wFp+bLrt2wkkIA:+Qj9U3jwO3rt5f
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\ewk = "{6e8f6af2-e607-3b5c-f718-e607e27acfba}" rundll32.exe -
Loads dropped DLL 1 IoCs
pid Process 1712 rundll32.exe -
Drops file in System32 directory 4 IoCs
description ioc Process File created C:\Windows\SysWOW64\rjx.dll rundll32.exe File opened for modification C:\Windows\SysWOW64\rjx.dll rundll32.exe File created C:\Windows\SysWOW64\zrf.dll rundll32.exe File opened for modification C:\Windows\SysWOW64\zrf.dll rundll32.exe -
Modifies registry class 5 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6e8f6af2-e607-3b5c-f718-e607e27acfba} rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6e8f6af2-e607-3b5c-f718-e607e27acfba}\ rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6e8f6af2-e607-3b5c-f718-e607e27acfba}\InprocServer32 rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6e8f6af2-e607-3b5c-f718-e607e27acfba}\InprocServer32\ = "C:\\Windows\\SysWow64\\zrf.dll" rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6e8f6af2-e607-3b5c-f718-e607e27acfba}\InprocServer32\ThreadingModel = "Apartment" rundll32.exe -
Suspicious behavior: EnumeratesProcesses 1 IoCs
pid Process 1712 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 1712 rundll32.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1712 rundll32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 1452 wrote to memory of 1712 1452 rundll32.exe 28 PID 1452 wrote to memory of 1712 1452 rundll32.exe 28 PID 1452 wrote to memory of 1712 1452 rundll32.exe 28 PID 1452 wrote to memory of 1712 1452 rundll32.exe 28 PID 1452 wrote to memory of 1712 1452 rundll32.exe 28 PID 1452 wrote to memory of 1712 1452 rundll32.exe 28 PID 1452 wrote to memory of 1712 1452 rundll32.exe 28
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\7ef089a28ad062c7514e8a31ba66f345343938df9c789eb2b58c29919833e7b9.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:1452 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\7ef089a28ad062c7514e8a31ba66f345343938df9c789eb2b58c29919833e7b9.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:1712
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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