a21245d134b7feadb36765bdd9cd6e31933fe8c3e29482d77ec3052b0b3a2593

Analysis

max time kernel
150s
max time network
125s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
08-01-2024 08:21

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General

Target

4aecbe394861e9f895aca5ca24e05b55.exe
Size

25KB
MD5

4aecbe394861e9f895aca5ca24e05b55
SHA1

c392edd79f08e84cfddf0ab67240d472e474cce6
SHA256

a21245d134b7feadb36765bdd9cd6e31933fe8c3e29482d77ec3052b0b3a2593
SHA512

a625ce04181db4b8604ddb108d379d4af3efa991bf6cb658eaf855680dc268713d016fd72b048707bc026a3b2b0066650d1a502d76eb8bbfbae385fd89b295f8
SSDEEP

384:yPaCpRN9C3pTQE4xP31AlZQkcCd1gAUmGmDAixogZdLF5OlkJhYPTGs2kBH:4Zp43pL4xPvUHUmGGAwoORJUTekx

Score

7^/10

adware persistence stealer

Malware Config

Signatures

Loads dropped DLL 4 IoCs

pid	Process
320	RunDll32.exe
320	RunDll32.exe
320	RunDll32.exe
320	RunDll32.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\{088bd2e9-29a9-4df2-ab8b-79889a28c073}	RunDll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{088bd2e9-29a9-4df2-ab8b-79889a28c073}\	RunDll32.exe

Modifies WinLogon 2 TTPs 7 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\mfc1-0\Shutdown = "NotifyShutdown"	RunDll32.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\	RunDll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\mfc1-0	RunDll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\mfc1-0\Asynchronous = "0"	RunDll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\mfc1-0\Dllname = "mfc1-0.dll"	RunDll32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\mfc1-0\Impersonate = "0"	RunDll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\mfc1-0\Startup = "NotifyStartup"	RunDll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\mfc1-0.dll	4aecbe394861e9f895aca5ca24e05b55.exe

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{088bd2e9-29a9-4df2-ab8b-79889a28c073}\InprocServer32\ThreadingModel = "Free"	RunDll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{088bd2e9-29a9-4df2-ab8b-79889a28c073}	RunDll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{088bd2e9-29a9-4df2-ab8b-79889a28c073}\InprocServer32	RunDll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{088bd2e9-29a9-4df2-ab8b-79889a28c073}\InprocServer32\ = "C:\\Windows\\SysWow64\\mfc1-0.dll"	RunDll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
320	RunDll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1684 wrote to memory of 320	1684	4aecbe394861e9f895aca5ca24e05b55.exe	16
PID 1684 wrote to memory of 320	1684	4aecbe394861e9f895aca5ca24e05b55.exe	16
PID 1684 wrote to memory of 320	1684	4aecbe394861e9f895aca5ca24e05b55.exe	16
PID 1684 wrote to memory of 320	1684	4aecbe394861e9f895aca5ca24e05b55.exe	16
PID 1684 wrote to memory of 320	1684	4aecbe394861e9f895aca5ca24e05b55.exe	16
PID 1684 wrote to memory of 320	1684	4aecbe394861e9f895aca5ca24e05b55.exe	16
PID 1684 wrote to memory of 320	1684	4aecbe394861e9f895aca5ca24e05b55.exe	16

C:\Users\Admin\AppData\Local\Temp\4aecbe394861e9f895aca5ca24e05b55.exe
"C:\Users\Admin\AppData\Local\Temp\4aecbe394861e9f895aca5ca24e05b55.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1684
- C:\Windows\SysWOW64\RunDll32.exe
  RunDll32.exe "C:\Windows\system32\mfc1-0.dll",DNSetup
  2⤵
  - Loads dropped DLL
  - Installs/modifies Browser Helper Object
  - Modifies WinLogon
  - Modifies registry class
  - Suspicious use of SetWindowsHookEx
  PID:320

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Browser Extensions

T1176

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Winlogon Helper DLL

T1547.004

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/320-6-0x0000000010000000-0x000000001001A000-memory.dmp

Filesize
104KB

Download
memory/320-7-0x0000000010000000-0x000000001001A000-memory.dmp

Filesize
104KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads