Malware Analysis Report

2024-08-06 09:25

Sample ID 230731-ptndksfd76
Target yOMHr.exe
SHA256 8b0a5fb13309623c3518473551cb1f55d38d8450129d4a3c16b476f7b2867d7d
Tags
persistence
score
7/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
7/10

SHA256

8b0a5fb13309623c3518473551cb1f55d38d8450129d4a3c16b476f7b2867d7d

Threat Level: Shows suspicious behavior

The file yOMHr.exe was found to be: Shows suspicious behavior.

Malicious Activity Summary

persistence

Checks computer location settings

Adds Run key to start application

Unsigned PE

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Privilege Escalation
TA0004
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Defense Evasion
TA0005
Modify Registry
T1112
Credential Access
TA0006
Discovery
TA0007
Query Registry
T1012
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2023-07-31 12:37

Signatures

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-07-31 12:37

Reported

2023-07-31 12:37

Platform

win10v2004-20230703-en

Max time kernel

7s

Max time network

14s

Command Line

C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc

Signatures

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\yOMHr.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run C:\Windows\system32\reg.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1420546310-613437930-2990200354-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchos = "C:\\Users\\Admin\\AppData\\Local\\Temp\\yOMHr.exe" C:\Windows\system32\reg.exe N/A

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\yOMHr.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\yOMHr.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\yOMHr.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4172 wrote to memory of 2612 N/A C:\Users\Admin\AppData\Local\Temp\yOMHr.exe C:\Windows\System32\cmd.exe
PID 4172 wrote to memory of 2612 N/A C:\Users\Admin\AppData\Local\Temp\yOMHr.exe C:\Windows\System32\cmd.exe
PID 4172 wrote to memory of 2704 N/A C:\Users\Admin\AppData\Local\Temp\yOMHr.exe C:\Windows\system32\sihost.exe
PID 2612 wrote to memory of 1504 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\reg.exe
PID 2612 wrote to memory of 1504 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\reg.exe
PID 4172 wrote to memory of 2764 N/A C:\Users\Admin\AppData\Local\Temp\yOMHr.exe C:\Windows\system32\svchost.exe
PID 4172 wrote to memory of 2864 N/A C:\Users\Admin\AppData\Local\Temp\yOMHr.exe C:\Windows\system32\taskhostw.exe
PID 4172 wrote to memory of 3260 N/A C:\Users\Admin\AppData\Local\Temp\yOMHr.exe C:\Windows\system32\svchost.exe

Processes

C:\Windows\system32\svchost.exe

C:\Windows\system32\svchost.exe -k ClipboardSvcGroup -p -s cbdhsvc

C:\Windows\system32\taskhostw.exe

taskhostw.exe {222A245B-E637-4AE9-A93F-A59CA119A75E}

C:\Windows\system32\svchost.exe

C:\Windows\system32\svchost.exe -k UnistackSvcGroup -s CDPUserSvc

C:\Windows\system32\sihost.exe

sihost.exe

C:\Users\Admin\AppData\Local\Temp\yOMHr.exe

"C:\Users\Admin\AppData\Local\Temp\yOMHr.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\yOMHr.exe" /f

C:\Windows\system32\reg.exe

REG ADD "HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "svchos" /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\yOMHr.exe" /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp

Files

memory/2704-133-0x00007FF6A83F0000-0x00007FF6A877E000-memory.dmp

memory/2704-134-0x00007FF6A83F0000-0x00007FF6A877E000-memory.dmp