Malware Analysis Report

2025-08-05 19:11

Sample ID 240328-ccwmeacg7y
Target sam1
SHA256 aaf3217873dc472a323ea35b46a945635a4b20fc9ccec6eae30cef0ab770e16f
Tags
ramnit banker evasion persistence spyware stealer trojan upx worm
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

aaf3217873dc472a323ea35b46a945635a4b20fc9ccec6eae30cef0ab770e16f

Threat Level: Known bad

The file sam1 was found to be: Known bad.

Malicious Activity Summary

ramnit banker evasion persistence spyware stealer trojan upx worm

UAC bypass

Modifies WinLogon for persistence

Modifies firewall policy service

Ramnit

Modifies security service

Windows security bypass

UPX packed file

Drops startup file

Windows security modification

Checks whether UAC is enabled

Adds Run key to start application

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

System policy modification

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-03-28 01:56

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-28 01:56

Reported

2024-03-28 01:56

Platform

win7-20240221-en

Max time kernel

4s

Max time network

2s

Command Line

"C:\Users\Admin\AppData\Local\Temp\sam1.exe"

Signatures

Modifies WinLogon for persistence

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,,C:\\Users\\Admin\\AppData\\Local\\tlueyhtg\\crmqjhdw.exe" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "userinit.exe,C:\\Users\\Admin\\AppData\\Local\\tlueyhtg\\crmqjhdw.exe" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Modifies firewall policy service

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Modifies security service

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wscsvc\Start = "4" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\MpsSvc\Start = "4" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\WinDefend\Start = "4" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wuauserv\Start = "4" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Ramnit

trojan spyware stealer worm banker ramnit

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Windows security bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Drops startup file

Description Indicator Process Target
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crmqjhdw.exe C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crmqjhdw.exe C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

UPX packed file

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

Windows security modification

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusOverride = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\FirewallOverride = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Security Center\UacDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-406356229-2805545415-1236085040-1000\Software\Microsoft\Windows\CurrentVersion\Run\CrmQjhdw = "C:\\Users\\Admin\\AppData\\Local\\tlueyhtg\\crmqjhdw.exe" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Token: SeRestorePrivilege N/A C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Token: SeBackupPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Token: SeShutdownPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\sam1.exe

"C:\Users\Admin\AppData\Local\Temp\sam1.exe"

Network

N/A

Files

memory/2244-1-0x0000000015190000-0x000000001527D000-memory.dmp

memory/2244-0-0x0000000001EB0000-0x0000000001EB1000-memory.dmp

memory/2244-2-0x00000000002C0000-0x00000000002C1000-memory.dmp

memory/2244-4-0x0000000015190000-0x000000001527D000-memory.dmp

memory/2244-5-0x0000000015190000-0x000000001527D000-memory.dmp

memory/2244-9-0x0000000015190000-0x000000001527D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-28 01:56

Reported

2024-03-28 01:59

Platform

win10v2004-20240226-en

Max time kernel

146s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\sam1.exe"

Signatures

Modifies WinLogon for persistence

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\system32\\userinit.exe,,C:\\Users\\Admin\\AppData\\Local\\tjirxumr\\cmwhiuvi.exe" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Modifies firewall policy service

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\EnableFirewall = "0" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DoNotAllowExceptions = "0" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\DisableNotifications = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Modifies security service

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wscsvc\Start = "4" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\mpssvc\Start = "4" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\wuauserv\Start = "4" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Ramnit

trojan spyware stealer worm banker ramnit

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Windows security bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UacDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Drops startup file

Description Indicator Process Target
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cmwhiuvi.exe C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\cmwhiuvi.exe C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

UPX packed file

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

Windows security modification

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusOverride = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\AntiVirusDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\FirewallOverride = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UpdatesDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Security Center\UacDisableNotify = "1" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-513485977-2495024337-1260977654-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\CmwHiuvi = "C:\\Users\\Admin\\AppData\\Local\\tjirxumr\\cmwhiuvi.exe" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeSecurityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

System policy modification

evasion
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Users\Admin\AppData\Local\Temp\sam1.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\sam1.exe

"C:\Users\Admin\AppData\Local\Temp\sam1.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 202.121.18.2.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 214.143.182.52.in-addr.arpa udp

Files

memory/940-2-0x00000000009D0000-0x00000000009D1000-memory.dmp

memory/940-1-0x0000000015190000-0x000000001527D000-memory.dmp

memory/940-0-0x00000000009B0000-0x00000000009B1000-memory.dmp

memory/940-4-0x0000000015190000-0x000000001527D000-memory.dmp

memory/940-8-0x0000000015190000-0x000000001527D000-memory.dmp

memory/940-9-0x0000000015190000-0x000000001527D000-memory.dmp