Malware Analysis Report

2024-12-07 03:27

Sample ID 241113-c1rncsyjdk
Target 76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe
SHA256 76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e
Tags
remcos gasplant evasion execution rat trojan
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

76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e

Threat Level: Known bad

The file 76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe was found to be: Known bad.

Malicious Activity Summary

remcos gasplant evasion execution rat trojan

Remcos family

Remcos

Windows security bypass

UAC bypass

Command and Scripting Interpreter: PowerShell

Windows security modification

Checks computer location settings

Checks whether UAC is enabled

Suspicious use of SetThreadContext

Unsigned PE

Enumerates physical storage devices

Program crash

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

System policy modification

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-13 02:32

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-13 02:32

Reported

2024-11-13 02:35

Platform

win7-20240903-en

Max time kernel

122s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe"

Signatures

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe

"C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe"

Network

N/A

Files

memory/2708-0-0x000007FEF52E3000-0x000007FEF52E4000-memory.dmp

memory/2708-1-0x0000000000980000-0x000000000098A000-memory.dmp

memory/2708-2-0x000000001AE90000-0x000000001AF60000-memory.dmp

memory/2708-3-0x000007FEF52E0000-0x000007FEF5CCC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-13 02:32

Reported

2024-11-13 02:35

Platform

win10v2004-20241007-en

Max time kernel

148s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe"

Signatures

Remcos

rat remcos

Remcos family

remcos

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\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe N/A

Windows security bypass

evasion trojan
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe = "0" C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe N/A

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe N/A

Windows security modification

evasion trojan
Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe = "0" C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.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\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe N/A
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4000 set thread context of 4696 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4000 wrote to memory of 2552 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4000 wrote to memory of 2552 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 4000 wrote to memory of 4696 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4000 wrote to memory of 4696 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4000 wrote to memory of 4696 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4000 wrote to memory of 4696 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4000 wrote to memory of 4696 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4000 wrote to memory of 4696 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4000 wrote to memory of 4696 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4000 wrote to memory of 4696 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4000 wrote to memory of 4696 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4000 wrote to memory of 4696 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4000 wrote to memory of 1180 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4000 wrote to memory of 1180 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4000 wrote to memory of 1180 N/A C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe

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\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe

"C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe"

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\76c67a9a7f86000d03ecca3a53412616677be7841755bccb6b1b988568b8fa3e.exe" -Force

C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe"

C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe

"C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4696 -ip 4696

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4696 -s 24

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp

Files

memory/4000-0-0x00007FFA20943000-0x00007FFA20945000-memory.dmp

memory/4000-1-0x000002D15B750000-0x000002D15B75A000-memory.dmp

memory/4000-2-0x000002D15D3C0000-0x000002D15D490000-memory.dmp

memory/4000-3-0x00007FFA20940000-0x00007FFA21401000-memory.dmp

memory/4696-4-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2552-5-0x00007FFA20940000-0x00007FFA21401000-memory.dmp

memory/2552-6-0x00007FFA20940000-0x00007FFA21401000-memory.dmp

memory/2552-12-0x00007FFA20940000-0x00007FFA21401000-memory.dmp

memory/2552-17-0x0000018E24F50000-0x0000018E24F72000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_chq3xecw.5cc.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4000-19-0x00007FFA20940000-0x00007FFA21401000-memory.dmp

memory/2552-21-0x00007FFA20940000-0x00007FFA21401000-memory.dmp