Malware Analysis Report

2025-06-16 01:18

Sample ID 231205-h5we1ahg5x
Target GH09876545600-87.bat
SHA256 1f0a225b3b04a26d777a315cb1cacde6d5b0d7fc9e182a96ef035b41adada2de
Tags
remcos remotehost rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

1f0a225b3b04a26d777a315cb1cacde6d5b0d7fc9e182a96ef035b41adada2de

Threat Level: Known bad

The file GH09876545600-87.bat was found to be: Known bad.

Malicious Activity Summary

remcos remotehost rat

Remcos

Drops startup file

Suspicious use of SetThreadContext

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-05 07:19

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-05 07:19

Reported

2023-12-05 07:22

Platform

win7-20231130-en

Max time kernel

149s

Max time network

143s

Command Line

"C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe"

Signatures

Remcos

rat remcos

Drops startup file

Description Indicator Process Target
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2916 set thread context of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2916 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
PID 2916 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
PID 2916 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
PID 2916 wrote to memory of 2748 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
PID 2916 wrote to memory of 2036 N/A C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe

Processes

C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe

"C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe"

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe

"Powershell.exe" -ExecutionPolicy Bypass -command Copy-Item 'C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe'

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

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

Network

Country Destination Domain Proto
US 107.175.229.139:8087 tcp
US 107.175.229.139:8087 tcp
US 107.175.229.139:8087 tcp
US 107.175.229.139:8087 tcp
US 107.175.229.139:8087 tcp
US 107.175.229.139:8087 tcp
US 107.175.229.139:8087 tcp

Files

memory/2916-1-0x00000000743E0000-0x0000000074ACE000-memory.dmp

memory/2916-0-0x0000000000040000-0x000000000018A000-memory.dmp

memory/2916-2-0x0000000001FB0000-0x000000000205E000-memory.dmp

memory/2916-3-0x0000000004540000-0x0000000004580000-memory.dmp

memory/2748-6-0x000000006FAE0000-0x000000007008B000-memory.dmp

memory/2748-7-0x000000006FAE0000-0x000000007008B000-memory.dmp

memory/2748-9-0x0000000002840000-0x0000000002880000-memory.dmp

memory/2748-8-0x0000000002840000-0x0000000002880000-memory.dmp

memory/2748-11-0x000000006FAE0000-0x000000007008B000-memory.dmp

memory/2916-12-0x0000000000570000-0x000000000057A000-memory.dmp

memory/2036-16-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-17-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-15-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-18-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-14-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-13-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-23-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-26-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2916-25-0x00000000743E0000-0x0000000074ACE000-memory.dmp

memory/2036-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2036-28-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-20-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-32-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-31-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-29-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-19-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-33-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-38-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-39-0x0000000000400000-0x0000000000482000-memory.dmp

C:\ProgramData\remcos\logs.dat

MD5 d897b203e55bf7879a7c8e45cd5bdcff
SHA1 343f9dc924a799fca45c87c73f27ba7db41cf227
SHA256 a79232f6e5f55954b5857673cd4ca6b72f7c11d82504c1847b570dd6e2507d8f
SHA512 4d011abb4768e9db218ac0a661802da3f4e872b9034281ecd9adad08d6117b489ed3ba6b4f4461591b8f5d877689b3d56ee1913375fbd1aea1f1eea8d0f7af18

memory/2036-44-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-45-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-51-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-52-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-57-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-58-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-63-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-65-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-70-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2036-71-0x0000000000400000-0x0000000000482000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-05 07:19

Reported

2023-12-05 07:22

Platform

win10v2004-20231130-en

Max time kernel

143s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe"

Signatures

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe

"C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe"

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe

"Powershell.exe" -ExecutionPolicy Bypass -command Copy-Item 'C:\Users\Admin\AppData\Local\Temp\GH09876545600-87.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe'

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp

Files

memory/392-1-0x00000000747B0000-0x0000000074F60000-memory.dmp

memory/392-0-0x0000000000350000-0x000000000049A000-memory.dmp

memory/392-2-0x0000000002890000-0x00000000028A0000-memory.dmp

memory/392-3-0x0000000002910000-0x00000000029BE000-memory.dmp

memory/392-4-0x0000000005500000-0x0000000005AA4000-memory.dmp

memory/392-5-0x0000000004FF0000-0x0000000005082000-memory.dmp

memory/392-6-0x0000000005090000-0x000000000512C000-memory.dmp

memory/4544-8-0x00000000747B0000-0x0000000074F60000-memory.dmp

memory/4544-9-0x0000000002820000-0x0000000002830000-memory.dmp

memory/4544-7-0x00000000027C0000-0x00000000027F6000-memory.dmp

memory/4544-10-0x0000000002820000-0x0000000002830000-memory.dmp

memory/4544-11-0x00000000051C0000-0x00000000057E8000-memory.dmp

memory/4544-12-0x0000000005110000-0x0000000005132000-memory.dmp

memory/4544-13-0x00000000057F0000-0x0000000005856000-memory.dmp

memory/4544-19-0x0000000005A50000-0x0000000005AB6000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ugw3rj3e.t21.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4544-24-0x0000000005D20000-0x0000000006074000-memory.dmp

memory/4544-25-0x00000000060D0000-0x00000000060EE000-memory.dmp

memory/4544-26-0x0000000006110000-0x000000000615C000-memory.dmp

memory/392-27-0x00000000029E0000-0x00000000029EA000-memory.dmp

memory/392-29-0x00000000747B0000-0x0000000074F60000-memory.dmp

memory/4544-32-0x0000000006610000-0x0000000006632000-memory.dmp

memory/4544-31-0x00000000065B0000-0x00000000065CA000-memory.dmp

memory/4544-30-0x00000000072E0000-0x0000000007376000-memory.dmp

memory/4544-36-0x00000000747B0000-0x0000000074F60000-memory.dmp