cf34427a303353d6427f22a6f0c8ae2e3e99e4d172d2207568133a2df7e6f4de

Analysis

max time kernel
176s
max time network
192s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26/12/2023, 14:56

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General

Target

77454009373782291cfd99bfc3d69234.dll
Size

14KB
MD5

77454009373782291cfd99bfc3d69234
SHA1

342f5d08d0c1cfd9cabfa24927e927153b7df454
SHA256

cf34427a303353d6427f22a6f0c8ae2e3e99e4d172d2207568133a2df7e6f4de
SHA512

7226e67b96ee671aef57c72a958eb974fda3f782e9393ccd464aa5d77365c18c1437a1dafb7fbafecd35b88a2fadecc32897d15c9a4d583f5f3bb166842446f9
SSDEEP

384:p9JNv8xgaywAnRWyMFKfuhi9qJg0mmCFcy:zXv8xewAnfMFnIcFEuy

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\{f250d521-225d-4d6b-8829-e064f944e180}	regsvr32.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\ajaa.dll	regsvr32.exe
File opened for modification	C:\Windows\SysWOW64\ajaa.dll	regsvr32.exe

Modifies registry class 3 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{f250d521-225d-4d6b-8829-e064f944e180}\InprocServer32\ = "C:\\Windows\\SysWow64\\ajaa.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{f250d521-225d-4d6b-8829-e064f944e180}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{f250d521-225d-4d6b-8829-e064f944e180}\InprocServer32	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 400 wrote to memory of 1596	400	regsvr32.exe	89
PID 400 wrote to memory of 1596	400	regsvr32.exe	89
PID 400 wrote to memory of 1596	400	regsvr32.exe	89

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\77454009373782291cfd99bfc3d69234.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:400
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\77454009373782291cfd99bfc3d69234.dll
  2⤵
  - Installs/modifies Browser Helper Object
  - Drops file in System32 directory
  - Modifies registry class
  PID:1596

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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