24f1d9809f97f72490b730cb4373b4cf03d8d0b5fe4d4f0d447b591fdd2254cf

Analysis

max time kernel
120s
max time network
121s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
30/12/2023, 11:20

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General

Target

16ff223a0b3a0111f7a4dbab4638981c.dll
Size

192KB
MD5

16ff223a0b3a0111f7a4dbab4638981c
SHA1

cc845066f5cc97926f1ee01d9eb1e6d1a78a8e58
SHA256

24f1d9809f97f72490b730cb4373b4cf03d8d0b5fe4d4f0d447b591fdd2254cf
SHA512

cb3b964f02ceb32a1100ed51aa79e6131db97c38ab3281a6a1c10f58bad2992fd3f6bdccd57e695a236d459d8a8539cb18d3b3760f58bafd69fff059f3791c2d
SSDEEP

3072:gQ7pWdHCS+lwr3D1LeAOGGuL2+MSpFRW+nE28GwGlEdUcKGvx6:gYWdHCSX1LWGGuC3Spq285GlEdGGp6

Score

8^/10

adware persistence stealer

Malware Config

Signatures

Sets file execution options in registry 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ctfmon.exe\Debugger = "C:\\Windows\\system32\\ctfmon_no.exe"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ctfmon.exe	regsvr32.exe

Installs/modifies Browser Helper Object 2 TTPs 3 IoCs

BHOs are DLL modules which act as plugins for Internet Explorer.

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{021975C8-C263-3B46-9D1A-E78C3D641493}	regsvr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{021975C8-C263-3B46-9D1A-E78C3D641493}\IExplore = "1"	regsvr32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\ctfmon_no.exe	regsvr32.exe

Modifies registry class 41 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\D.1\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F9AA02C5-6AD9-399A-ACC0-2A7AFFEED75B}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F9AA02C5-6AD9-399A-ACC0-2A7AFFEED75B}\TypeLib\ = "{C7E97F5D-CFEE-31E7-B984-2708FFD08375}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{C7E97F5D-CFEE-31E7-B984-2708FFD08375}\1.0\ = "LIB"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{C7E97F5D-CFEE-31E7-B984-2708FFD08375}\1.0\FLAGS\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{F9AA02C5-6AD9-399A-ACC0-2A7AFFEED75B}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\D.1\CLSID\ = "{021975C8-C263-3B46-9D1A-E78C3D641493}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{021975C8-C263-3B46-9D1A-E78C3D641493}\VersionIndependentProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{C7E97F5D-CFEE-31E7-B984-2708FFD08375}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\D\ = "D"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{F9AA02C5-6AD9-399A-ACC0-2A7AFFEED75B}\ = "IDOMPeek"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{F9AA02C5-6AD9-399A-ACC0-2A7AFFEED75B}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{021975C8-C263-3B46-9D1A-E78C3D641493}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{021975C8-C263-3B46-9D1A-E78C3D641493}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\16ff223a0b3a0111f7a4dbab4638981c.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{F9AA02C5-6AD9-399A-ACC0-2A7AFFEED75B}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\D\CLSID\ = "{021975C8-C263-3B46-9D1A-E78C3D641493}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{021975C8-C263-3B46-9D1A-E78C3D641493}\ProgID\ = "D.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{021975C8-C263-3B46-9D1A-E78C3D641493}\VersionIndependentProgID\ = "D"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\D	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{021975C8-C263-3B46-9D1A-E78C3D641493}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{C7E97F5D-CFEE-31E7-B984-2708FFD08375}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\16ff223a0b3a0111f7a4dbab4638981c.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{C7E97F5D-CFEE-31E7-B984-2708FFD08375}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{F9AA02C5-6AD9-399A-ACC0-2A7AFFEED75B}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{F9AA02C5-6AD9-399A-ACC0-2A7AFFEED75B}\TypeLib\ = "{C7E97F5D-CFEE-31E7-B984-2708FFD08375}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{F9AA02C5-6AD9-399A-ACC0-2A7AFFEED75B}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F9AA02C5-6AD9-399A-ACC0-2A7AFFEED75B}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{021975C8-C263-3B46-9D1A-E78C3D641493}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{C7E97F5D-CFEE-31E7-B984-2708FFD08375}\1.0\0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{C7E97F5D-CFEE-31E7-B984-2708FFD08375}\1.0\0\win32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F9AA02C5-6AD9-399A-ACC0-2A7AFFEED75B}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{021975C8-C263-3B46-9D1A-E78C3D641493}\ = "D"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F9AA02C5-6AD9-399A-ACC0-2A7AFFEED75B}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F9AA02C5-6AD9-399A-ACC0-2A7AFFEED75B}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\D.1	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\D.1\ = "D"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\D\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{C7E97F5D-CFEE-31E7-B984-2708FFD08375}\1.0\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{F9AA02C5-6AD9-399A-ACC0-2A7AFFEED75B}\ = "IDOMPeek"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{021975C8-C263-3B46-9D1A-E78C3D641493}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{C7E97F5D-CFEE-31E7-B984-2708FFD08375}\1.0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{C7E97F5D-CFEE-31E7-B984-2708FFD08375}\1.0\FLAGS	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2360 wrote to memory of 1896	2360	regsvr32.exe	16
PID 2360 wrote to memory of 1896	2360	regsvr32.exe	16
PID 2360 wrote to memory of 1896	2360	regsvr32.exe	16
PID 2360 wrote to memory of 1896	2360	regsvr32.exe	16
PID 2360 wrote to memory of 1896	2360	regsvr32.exe	16
PID 2360 wrote to memory of 1896	2360	regsvr32.exe	16
PID 2360 wrote to memory of 1896	2360	regsvr32.exe	16

C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\16ff223a0b3a0111f7a4dbab4638981c.dll
1⤵
- Sets file execution options in registry
- Installs/modifies Browser Helper Object
- Drops file in System32 directory
- Modifies registry class
PID:1896

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\16ff223a0b3a0111f7a4dbab4638981c.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2360

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Browser Extensions

T1176

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Windows 7 deprecation

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads