f3b1d24ae8b5e245c9806b0c67ff1f7f93f5b86d639f5914a4a2b8dce22484e6

Analysis

max time kernel
120s
max time network
122s
platform
windows7_x64
resource
win7-20240220-en
resource tags

arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
submitted
14/03/2024, 19:10

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General

Target

List of suspected clients/ptusredt.dll
Size

165KB
MD5

3c3e960d59cb413791fee1e944b6df72
SHA1

4aa6c90d81692642ca8266bf0d8e249ff3e3ad54
SHA256

88378c228d7827974fe6ec827837af7571290e129082e7070d4bff7a42f4ba67
SHA512

85b471aa2a066c6a779384ed102b895af108af51cd718bb834cda107f71bf5e6fcd8ecc77e9ea4fd7fd3ddbc10b1f57870a9bafcbbfa1be8e2ba224651d77aac
SSDEEP

3072:Ze0HJrRJW9+tjxQGsfzeV0YuNmu5uWj5ONq/1epLcv60H9+v:8SrRJGeNsry0hmuqRoy0H9u

Score

1^/10

Malware Config

Signatures

Modifies registry class 31 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E8D0CE8D-BC70-4025-978F-E86068362730}\VersionIndependentProgID\ = "UserEditHelp.UserNameHolder"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A15A1C00-9788-44D9-AA0A-723F170887CF}\1.0\0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\UserEditHelp.UserNameHolder.1	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\UserEditHelp.UserNameHolder.1\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\UserEditHelp.UserNameHolder\ = "UserNameHolder Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\UserEditHelp.UserNameHolder\CurVer\ = "UserEditHelp.UserNameHolder.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E8D0CE8D-BC70-4025-978F-E86068362730}\ProgID\ = "UserEditHelp.UserNameHolder.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A15A1C00-9788-44D9-AA0A-723F170887CF}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\List of suspected clients\\ptusredt.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\UserEditHelp.UserNameHolder.1\ = "UserNameHolder Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\UserEditHelp.UserNameHolder\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\UserEditHelp.UserNameHolder\CurVer	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E8D0CE8D-BC70-4025-978F-E86068362730}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E8D0CE8D-BC70-4025-978F-E86068362730}\TypeLib\ = "{A15A1C00-9788-44D9-AA0A-723F170887CF}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E8D0CE8D-BC70-4025-978F-E86068362730}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A15A1C00-9788-44D9-AA0A-723F170887CF}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A15A1C00-9788-44D9-AA0A-723F170887CF}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\List of suspected clients"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\UserEditHelp.UserNameHolder.1\CLSID\ = "{E8D0CE8D-BC70-4025-978F-E86068362730}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E8D0CE8D-BC70-4025-978F-E86068362730}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E8D0CE8D-BC70-4025-978F-E86068362730}\ = "UserNameHolder Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E8D0CE8D-BC70-4025-978F-E86068362730}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\List of suspected clients\\ptusredt.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E8D0CE8D-BC70-4025-978F-E86068362730}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E8D0CE8D-BC70-4025-978F-E86068362730}\VersionIndependentProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A15A1C00-9788-44D9-AA0A-723F170887CF}\1.0\0\win32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A15A1C00-9788-44D9-AA0A-723F170887CF}\1.0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\UserEditHelp.UserNameHolder\CLSID\ = "{E8D0CE8D-BC70-4025-978F-E86068362730}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A15A1C00-9788-44D9-AA0A-723F170887CF}\1.0\HELPDIR	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\UserEditHelp.UserNameHolder	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{E8D0CE8D-BC70-4025-978F-E86068362730}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A15A1C00-9788-44D9-AA0A-723F170887CF}\1.0\ = "UserEditHelp 1.0 Type Library"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A15A1C00-9788-44D9-AA0A-723F170887CF}\1.0\FLAGS	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{A15A1C00-9788-44D9-AA0A-723F170887CF}\1.0\FLAGS\ = "0"	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2192 wrote to memory of 1892	2192	regsvr32.exe	29
PID 2192 wrote to memory of 1892	2192	regsvr32.exe	29
PID 2192 wrote to memory of 1892	2192	regsvr32.exe	29
PID 2192 wrote to memory of 1892	2192	regsvr32.exe	29
PID 2192 wrote to memory of 1892	2192	regsvr32.exe	29
PID 2192 wrote to memory of 1892	2192	regsvr32.exe	29
PID 2192 wrote to memory of 1892	2192	regsvr32.exe	29

C:\Windows\system32\regsvr32.exe
regsvr32 /s "C:\Users\Admin\AppData\Local\Temp\List of suspected clients\ptusredt.dll"
1⤵
- Suspicious use of WriteProcessMemory
PID:2192
- C:\Windows\SysWOW64\regsvr32.exe
  /s "C:\Users\Admin\AppData\Local\Temp\List of suspected clients\ptusredt.dll"
  2⤵
  - Modifies registry class
  PID:1892

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Malware Config

Signatures

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Network

MITRE ATT&CK Matrix

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