36fe0b9f08dcff684a786175cfb392e6749ea2618bc8ed8bfbb6b90cb76d5961

Analysis

max time kernel
155s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
11/03/2024, 15:33

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General

Target

c0f1c92a74f2e4d96f26f5f08963ec8e.exe
Size

35KB
MD5

c0f1c92a74f2e4d96f26f5f08963ec8e
SHA1

8d143e96879e76898a3540b32d1423ea06c10136
SHA256

36fe0b9f08dcff684a786175cfb392e6749ea2618bc8ed8bfbb6b90cb76d5961
SHA512

26971a4c0544c7958e418eb5d466a5dff27cfaf606707ac5f094af9a2599ceb4ed863827b70ce391340e455d68d3794dfb9fe243e4a70f2e8420cf2c9d1d0eb2
SSDEEP

768:LLp41wWGI9sLAqFU+YW/ywFOoWhBQ8+YPeQ6:LLp41B9sLdK9OkhQd

Score

7^/10

adware stealer

Malware Config

Signatures

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	c0f1c92a74f2e4d96f26f5f08963ec8e.exe

Installs/modifies Browser Helper Object 2 TTPs 5 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	c0f1c92a74f2e4d96f26f5f08963ec8e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{1FD49718-1D00-4B19-AF5F-070AF6D5D54C}	c0f1c92a74f2e4d96f26f5f08963ec8e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA}	c0f1c92a74f2e4d96f26f5f08963ec8e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{7361FADD-DCBB-4CAF-AB40-0232FBE02E94}	c0f1c92a74f2e4d96f26f5f08963ec8e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{7361FADD-DCBB-4CAF-AB40-0232FBE02E94}\ = "Yahoo! Messenger"	c0f1c92a74f2e4d96f26f5f08963ec8e.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\mssystem.dat	c0f1c92a74f2e4d96f26f5f08963ec8e.exe
File created	C:\Windows\SysWOW64\msyahooea.dll	c0f1c92a74f2e4d96f26f5f08963ec8e.exe
File opened for modification	C:\Windows\SysWOW64\msyahooea.dll	c0f1c92a74f2e4d96f26f5f08963ec8e.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies Internet Explorer settings 1 TTPs 2 IoCs

adware spyware

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\Software\Microsoft\Internet Explorer\Main	c0f1c92a74f2e4d96f26f5f08963ec8e.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\SOFTWARE\Microsoft\Internet Explorer\Main\@#$E$@#n%^a&^%b#$%l^%$e^& %^&B#$%r&^%o$%w@#$s^%$e&r(& &E^&x$^%t%$#e@#$n&^%s#%i^o$%^n(&s%^& = "yes"	c0f1c92a74f2e4d96f26f5f08963ec8e.exe

Modifies registry class 6 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7361FADD-DCBB-4CAF-AB40-0232FBE02E94}\InProcServer32\ = "%SystemRoot%\\SysWow64\\msyahooea.dll"	c0f1c92a74f2e4d96f26f5f08963ec8e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7361FADD-DCBB-4CAF-AB40-0232FBE02E94}\InProcServer32\ThreadingModel = "Apartment"	c0f1c92a74f2e4d96f26f5f08963ec8e.exe
Key created	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000_Classes\WOW6432Node\CLSID	c0f1c92a74f2e4d96f26f5f08963ec8e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7361FADD-DCBB-4CAF-AB40-0232FBE02E94}	c0f1c92a74f2e4d96f26f5f08963ec8e.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7361FADD-DCBB-4CAF-AB40-0232FBE02E94}\ = "Yahoo! Messenger"	c0f1c92a74f2e4d96f26f5f08963ec8e.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7361FADD-DCBB-4CAF-AB40-0232FBE02E94}\InProcServer32	c0f1c92a74f2e4d96f26f5f08963ec8e.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 5100 wrote to memory of 4636	5100	c0f1c92a74f2e4d96f26f5f08963ec8e.exe	90
PID 5100 wrote to memory of 4636	5100	c0f1c92a74f2e4d96f26f5f08963ec8e.exe	90
PID 5100 wrote to memory of 4636	5100	c0f1c92a74f2e4d96f26f5f08963ec8e.exe	90

C:\Users\Admin\AppData\Local\Temp\c0f1c92a74f2e4d96f26f5f08963ec8e.exe
"C:\Users\Admin\AppData\Local\Temp\c0f1c92a74f2e4d96f26f5f08963ec8e.exe"
1⤵
- Checks computer location settings
- Installs/modifies Browser Helper Object
- Drops file in System32 directory
- Modifies Internet Explorer settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:5100
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /C system.bat
  2⤵
  PID:4636

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\system.bat

Filesize
111B

MD5
7844a3b91327c09974a966cb36b0f806

SHA1
e67afb20f7e0111c7bc0b2c7ea521d83425f6a15

SHA256
6d3fb11f4e715fee2fbfd4f7a5ef6a33cf3a481693e1c65a8533215495da9f6d

SHA512
ea1c337ea34badaf06d56140837572435d9a05b8cc46c38d6c9d3bec287b422b1f70ebef1c7fb58cd1b2b79c082ab2669188b33d44c6b9161ec2caa007c1f5c9

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads