b4f9cb68f8c93e0e913546f722fb1f3bf5a51e52f73eee312ec5f9b2a44eb089

Analysis

max time kernel
38s
max time network
45s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
04/12/2022, 13:29

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General

Target

b4f9cb68f8c93e0e913546f722fb1f3bf5a51e52f73eee312ec5f9b2a44eb089.dll
Size

694KB
MD5

3e396eee0527a73682644a199ac027b2
SHA1

d69b665fcc7f23e26d6f4496ad4481af7f26d375
SHA256

b4f9cb68f8c93e0e913546f722fb1f3bf5a51e52f73eee312ec5f9b2a44eb089
SHA512

2f5980a52bdbea5d78ddd609581ac3cfd9f1be1b6ff0628c01f54edf7285a9791f44ffe60f145aa43be2061450decf1683e16763e058c1621c779c5b429e2df1
SSDEEP

12288:R91ip6YcFUMrK4gFgM9G7Lgf0IXwMe9OKKhTHFLD:HU6HF70G7LgM6cEpTl

Score

6^/10

adware stealer

Malware Config

Signatures

Installs/modifies Browser Helper Object 2 TTPs 1 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\{28255825-5182-8CAD-BDB8-6F52F8171758}	regsvr32.exe

Modifies registry class 11 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{28255825-5182-8CAD-BDB8-6F52F8171758}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\b4f9cb68f8c93e0e913546f722fb1f3bf5a51e52f73eee312ec5f9b2a44eb089.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{28255825-5182-8CAD-BDB8-6F52F8171758}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\b4f9cb68f8c93e0e913546f722fb1f3bf5a51e52f73eee312ec5f9b2a44eb089.VaeTaCaExpDlib\ = "XenscAdsExyi"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\b4f9cb68f8c93e0e913546f722fb1f3bf5a51e52f73eee312ec5f9b2a44eb089.VaeTaCaExpDlib\Clsid	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{28255825-5182-8CAD-BDB8-6F52F8171758}\ = "XenscAdsExyi"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{28255825-5182-8CAD-BDB8-6F52F8171758}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\b4f9cb68f8c93e0e913546f722fb1f3bf5a51e52f73eee312ec5f9b2a44eb089.VaeTaCaExpDlib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\b4f9cb68f8c93e0e913546f722fb1f3bf5a51e52f73eee312ec5f9b2a44eb089.VaeTaCaExpDlib\Clsid\ = "{28255825-5182-8CAD-BDB8-6F52F8171758}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{28255825-5182-8CAD-BDB8-6F52F8171758}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{28255825-5182-8CAD-BDB8-6F52F8171758}\ProgID\ = "b4f9cb68f8c93e0e913546f722fb1f3bf5a51e52f73eee312ec5f9b2a44eb089.VaeTaCaExpDlib"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{28255825-5182-8CAD-BDB8-6F52F8171758}	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1640 wrote to memory of 1372	1640	regsvr32.exe	27
PID 1640 wrote to memory of 1372	1640	regsvr32.exe	27
PID 1640 wrote to memory of 1372	1640	regsvr32.exe	27
PID 1640 wrote to memory of 1372	1640	regsvr32.exe	27
PID 1640 wrote to memory of 1372	1640	regsvr32.exe	27
PID 1640 wrote to memory of 1372	1640	regsvr32.exe	27
PID 1640 wrote to memory of 1372	1640	regsvr32.exe	27

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\b4f9cb68f8c93e0e913546f722fb1f3bf5a51e52f73eee312ec5f9b2a44eb089.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1640
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\b4f9cb68f8c93e0e913546f722fb1f3bf5a51e52f73eee312ec5f9b2a44eb089.dll
  2⤵
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:1372

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Browser Extensions

T1176

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1372-56-0x0000000075071000-0x0000000075073000-memory.dmp

Filesize
8KB

Download
memory/1372-57-0x0000000000AB0000-0x0000000000B63000-memory.dmp

Filesize
716KB

Download
memory/1640-54-0x000007FEFB821000-0x000007FEFB823000-memory.dmp

Filesize
8KB

Download