8edfa0f10bf0d0b7861cc451da2b3a5c6c2f8daa42a08a8bce56324a107f30df

Analysis

max time kernel
119s
max time network
119s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
23/01/2024, 17:41

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General

Target

702a1b4a3465d6a7f869e59414e40d13.dll
Size

157KB
MD5

702a1b4a3465d6a7f869e59414e40d13
SHA1

b694bdb7ff4fa7c2b5bb8b0e833f4b580a7146f7
SHA256

8edfa0f10bf0d0b7861cc451da2b3a5c6c2f8daa42a08a8bce56324a107f30df
SHA512

839a0a327c2e77f755b04dd9cf047faf24afa7906ca3d4223c3855a0ec7b6c2021a6def70496b33d483d8f9884e64d775b9ad16ad221f69d2c8c7e59896c6009
SSDEEP

3072:dxJvb68680bAt3n45HtFCT3qwcV5juuy4v5Ign/0:dX+/bAtX45u3qw+yYGgn/

Score

6^/10

adware persistence stealer

Malware Config

Signatures

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\{87138048-f40a-69bf-37c8-9fd17c01193f} = "C:\\Windows\\System32\\Rundll32.exe \"C:\\Users\\Admin\\AppData\\Local\\Temp\\702a1b4a3465d6a7f869e59414e40d13.dll\" DllStart"	regsvr32.exe

Installs/modifies Browser Helper Object 2 TTPs 2 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\{c31f3bff-cacb-97be-cbc4-65ef7c472d89}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{c31f3bff-cacb-97be-cbc4-65ef7c472d89}\NoExplorer = "\"\""	regsvr32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c31f3bff-cacb-97be-cbc4-65ef7c472d89}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c31f3bff-cacb-97be-cbc4-65ef7c472d89}\ = "targetedbanner browser optimizer"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c31f3bff-cacb-97be-cbc4-65ef7c472d89}\InProcServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c31f3bff-cacb-97be-cbc4-65ef7c472d89}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\702a1b4a3465d6a7f869e59414e40d13.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{c31f3bff-cacb-97be-cbc4-65ef7c472d89}\InProcServer32\ThreadingModel = "Apartment"	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1992 wrote to memory of 2144	1992	regsvr32.exe	28
PID 1992 wrote to memory of 2144	1992	regsvr32.exe	28
PID 1992 wrote to memory of 2144	1992	regsvr32.exe	28
PID 1992 wrote to memory of 2144	1992	regsvr32.exe	28
PID 1992 wrote to memory of 2144	1992	regsvr32.exe	28
PID 1992 wrote to memory of 2144	1992	regsvr32.exe	28
PID 1992 wrote to memory of 2144	1992	regsvr32.exe	28

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\702a1b4a3465d6a7f869e59414e40d13.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1992
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\702a1b4a3465d6a7f869e59414e40d13.dll
  2⤵
  - Adds Run key to start application
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:2144

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

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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