890d849c5b686c4ff07b69b1e51d20c3ea15ec15166f654e1ed73e429a8ad988

Analysis

max time kernel
305s
max time network
383s
platform
windows10-2004_x64
resource
win10v2004-20221111-en
resource tags

arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
submitted
29-11-2022 06:04

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General

Target

890d849c5b686c4ff07b69b1e51d20c3ea15ec15166f654e1ed73e429a8ad988.dll
Size

236KB
MD5

500bef7cb33ec8f47d99e66c1fa9d7b9
SHA1

33cb508186f3058c1603b34d46dc1bcafd52874c
SHA256

890d849c5b686c4ff07b69b1e51d20c3ea15ec15166f654e1ed73e429a8ad988
SHA512

db173886bfdb47bd385299a7e919dedce2c178d7377194d1cb1a33b88a8926535dccd83d101c7f9b8203aaa5962d2efc8a516a2a8d0a1d8c93828d95c0564583
SSDEEP

6144:oIOuRLOKTh2if+qb23d6FSTQV8Kq/7bu6:oHmLBdzMEMTQSq

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

T1060

Modify Registry

T1112

Processes:

regsvr32.exe

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

Processes:

regsvr32.exe

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\{EE8E5AF6-E365-3F1A-97B3-B943512A1D5F}	regsvr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{EE8E5AF6-E365-3F1A-97B3-B943512A1D5F}\IExplore = "1"	regsvr32.exe

Drops file in System32 directory 1 IoCs

Processes:

regsvr32.exe

description ioc process

File created C:\Windows\SysWOW64\ctfmonyru.exe regsvr32.exe

description	ioc	process
File created	C:\Windows\SysWOW64\ctfmonyru.exe	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

regsvr32.exe

description	pid	process	target process
PID 1280 wrote to memory of 4308	1280	regsvr32.exe	regsvr32.exe
PID 1280 wrote to memory of 4308	1280	regsvr32.exe	regsvr32.exe
PID 1280 wrote to memory of 4308	1280	regsvr32.exe	regsvr32.exe

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\890d849c5b686c4ff07b69b1e51d20c3ea15ec15166f654e1ed73e429a8ad988.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1280

C:\Windows\SysWOW64\regsvr32.exe
/s C:\Users\Admin\AppData\Local\Temp\890d849c5b686c4ff07b69b1e51d20c3ea15ec15166f654e1ed73e429a8ad988.dll
2⤵
- Sets file execution options in registry
- Installs/modifies Browser Helper Object
- Drops file in System32 directory
PID:4308

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Browser Extensions

T1176

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/4308-132-0x0000000000000000-mapping.dmp

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