a32b668a91b9c3a6d3cff3b15d556572b948ddfddb24ac7f84a46335e2790f6f

Analysis

max time kernel
119s
max time network
124s
platform
windows7_x64
resource
win7-20240319-en
resource tags

arch:x64arch:x86image:win7-20240319-enlocale:en-usos:windows7-x64system
submitted
06-04-2024 23:16

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General

Target

iis_rewrite/mtbnotif.dll
Size

80KB
MD5

e75014ef4096b22fbd120398424102a5
SHA1

1fa336d3df933ccd70d5d98430219ff51fec8296
SHA256

9733873f8b5847bd5f9c5ba133798492313d36a352a975659b305e02a13ca798
SHA512

0ff5ff78b95ffa8e925e26a45e8aa306f0aa8d5f18e1998b6b2dd24130adfcd10139fe4d2fa431d766943083c0d10c05584e1ce173ffb784920660e1de8a80f4
SSDEEP

1536:/rOLavn+l7DGSBEJonjPTb0QwNIC/1y0++GrKcSaI9o:TOL2n+5hEW/2yC/1Q+GecSaeo

Score

1^/10

Malware Config

Signatures

Modifies registry class 31 IoCs

Processes:

regsvr32.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ISAPIRewrite.MetaBaseWatchDog\CurVer	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{27C3B8ED-0790-42BD-9AD7-18465E7F7696}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{27C3B8ED-0790-42BD-9AD7-18465E7F7696}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\iis_rewrite\\mtbnotif.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{27C3B8ED-0790-42BD-9AD7-18465E7F7696}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{97808F6C-4769-49D5-9553-18AE9C62ACD7}\1.0\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{97808F6C-4769-49D5-9553-18AE9C62ACD7}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\iis_rewrite\\"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ISAPIRewrite.MetaBaseWatchDog.1	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{27C3B8ED-0790-42BD-9AD7-18465E7F7696}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{97808F6C-4769-49D5-9553-18AE9C62ACD7}\1.0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{97808F6C-4769-49D5-9553-18AE9C62ACD7}\1.0\FLAGS\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ISAPIRewrite.MetaBaseWatchDog.1\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ISAPIRewrite.MetaBaseWatchDog	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{27C3B8ED-0790-42BD-9AD7-18465E7F7696}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{97808F6C-4769-49D5-9553-18AE9C62ACD7}\1.0\ = "mtbnotif 1.0 Type Library"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{27C3B8ED-0790-42BD-9AD7-18465E7F7696}\ = "MetaBaseWatchDog Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{97808F6C-4769-49D5-9553-18AE9C62ACD7}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{97808F6C-4769-49D5-9553-18AE9C62ACD7}\1.0\0\win32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{97808F6C-4769-49D5-9553-18AE9C62ACD7}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\iis_rewrite\\mtbnotif.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ISAPIRewrite.MetaBaseWatchDog.1\CLSID\ = "{27C3B8ED-0790-42BD-9AD7-18465E7F7696}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ISAPIRewrite.MetaBaseWatchDog\ = "MetaBaseWatchDog Class"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\ISAPIRewrite.MetaBaseWatchDog\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{27C3B8ED-0790-42BD-9AD7-18465E7F7696}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{27C3B8ED-0790-42BD-9AD7-18465E7F7696}\VersionIndependentProgID\ = "ISAPIRewrite.MetaBaseWatchDog"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{27C3B8ED-0790-42BD-9AD7-18465E7F7696}\TypeLib\ = "{97808F6C-4769-49D5-9553-18AE9C62ACD7}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{97808F6C-4769-49D5-9553-18AE9C62ACD7}\1.0\FLAGS	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{27C3B8ED-0790-42BD-9AD7-18465E7F7696}\ProgID\ = "ISAPIRewrite.MetaBaseWatchDog.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{97808F6C-4769-49D5-9553-18AE9C62ACD7}\1.0\0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ISAPIRewrite.MetaBaseWatchDog.1\ = "MetaBaseWatchDog Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ISAPIRewrite.MetaBaseWatchDog\CLSID\ = "{27C3B8ED-0790-42BD-9AD7-18465E7F7696}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\ISAPIRewrite.MetaBaseWatchDog\CurVer\ = "ISAPIRewrite.MetaBaseWatchDog.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{27C3B8ED-0790-42BD-9AD7-18465E7F7696}	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

Processes:

regsvr32.exe

description	pid	process	target process
PID 2360 wrote to memory of 1068	2360	regsvr32.exe	regsvr32.exe
PID 2360 wrote to memory of 1068	2360	regsvr32.exe	regsvr32.exe
PID 2360 wrote to memory of 1068	2360	regsvr32.exe	regsvr32.exe
PID 2360 wrote to memory of 1068	2360	regsvr32.exe	regsvr32.exe
PID 2360 wrote to memory of 1068	2360	regsvr32.exe	regsvr32.exe
PID 2360 wrote to memory of 1068	2360	regsvr32.exe	regsvr32.exe
PID 2360 wrote to memory of 1068	2360	regsvr32.exe	regsvr32.exe

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\iis_rewrite\mtbnotif.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2360

C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\iis_rewrite\mtbnotif.dll
2⤵
- Modifies registry class
PID:1068

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Malware Config

Signatures

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Network

MITRE ATT&CK Matrix

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