a148412a5c1cc9aba0ecdbb3e44010aeac75b40f23492bd04c0127e558aa44ac

Analysis

max time kernel
120s
max time network
124s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
18/01/2024, 04:31

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General

Target

OfferBoxBHO.dll
Size

131KB
MD5

b4b61f417df1f173a78a55e9029be6fb
SHA1

19facf2bc92cf281b21c704faeda72fdd2909fcf
SHA256

aef0ff4a4c0f589ea4839df6108b92adc024155281860703b28c70581aac6ee6
SHA512

ee9ad0a9acb8d1ba605aebdc061cbabfd5ad539169dbcef5c569be5e3b014ee7f33ad6313576a1aba4848886ee74f01d565192e06a124814ae1cae9c61b96ef6
SSDEEP

1536:brWkiTK8yE6Q7ZtbfpCRJt02GPLyRW75JrktWjC4rzHphl+lz54+U65nz677JOEN:/iTKFEdlwmPsgLT1+l++35n2f4Ftb2

Score

6^/10

adware stealer

Malware Config

Signatures

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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{FC0D62C2-9640-4AEB-A5D5-CF25DF11FA8C}\ = "OfferBox"	regsvr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{FC0D62C2-9640-4AEB-A5D5-CF25DF11FA8C}\NoExplorer = "49"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{FC0D62C2-9640-4AEB-A5D5-CF25DF11FA8C}	regsvr32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{FC0D62C2-9640-4AEB-A5D5-CF25DF11FA8C}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\OfferBoxBHO.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{FC0D62C2-9640-4AEB-A5D5-CF25DF11FA8C}\InProcServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{FC0D62C2-9640-4AEB-A5D5-CF25DF11FA8C}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{FC0D62C2-9640-4AEB-A5D5-CF25DF11FA8C}\ = "OfferBox"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{FC0D62C2-9640-4AEB-A5D5-CF25DF11FA8C}\InProcServer32	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1676 wrote to memory of 2040	1676	regsvr32.exe	28
PID 1676 wrote to memory of 2040	1676	regsvr32.exe	28
PID 1676 wrote to memory of 2040	1676	regsvr32.exe	28
PID 1676 wrote to memory of 2040	1676	regsvr32.exe	28
PID 1676 wrote to memory of 2040	1676	regsvr32.exe	28
PID 1676 wrote to memory of 2040	1676	regsvr32.exe	28
PID 1676 wrote to memory of 2040	1676	regsvr32.exe	28

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\OfferBoxBHO.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1676
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\OfferBoxBHO.dll
  2⤵
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:2040

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Windows 7 deprecation

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