Malware Analysis Report

2025-01-02 03:29

Sample ID 240723-lwnkkszhlq
Target rfq1960.exe
SHA256 2768689f6c4a60b7fe18d6c87fdecd8a7f8dceefa298a5851c4a7c6909f3a92d
Tags
remcos 5764576 execution 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

2768689f6c4a60b7fe18d6c87fdecd8a7f8dceefa298a5851c4a7c6909f3a92d

Threat Level: Known bad

The file rfq1960.exe was found to be: Known bad.

Malicious Activity Summary

remcos 5764576 execution rat

Remcos

Command and Scripting Interpreter: PowerShell

Checks computer location settings

Suspicious use of SetThreadContext

Enumerates physical storage devices

Unsigned PE

Scheduled Task/Job: Scheduled Task

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-23 09:53

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-23 09:53

Reported

2024-07-23 09:56

Platform

win7-20240705-en

Max time kernel

150s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\rfq1960.exe"

Signatures

Remcos

rat remcos

Command and Scripting Interpreter: PowerShell

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2452 set thread context of 3056 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe

Enumerates physical storage devices

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2452 wrote to memory of 2324 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 2452 wrote to memory of 2324 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 2452 wrote to memory of 2324 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 2452 wrote to memory of 2324 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 2452 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Windows\SysWOW64\schtasks.exe
PID 2452 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Windows\SysWOW64\schtasks.exe
PID 2452 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Windows\SysWOW64\schtasks.exe
PID 2452 wrote to memory of 2852 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Windows\SysWOW64\schtasks.exe
PID 2452 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 2452 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 2452 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 2452 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 2452 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 2452 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 2452 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 2452 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 2452 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 2452 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 2452 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 2452 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 2452 wrote to memory of 3056 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe

Processes

C:\Users\Admin\AppData\Local\Temp\rfq1960.exe

"C:\Users\Admin\AppData\Local\Temp\rfq1960.exe"

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\TlykqEvmBV.exe"

C:\Windows\SysWOW64\schtasks.exe

"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TlykqEvmBV" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD5C6.tmp"

C:\Users\Admin\AppData\Local\Temp\rfq1960.exe

"C:\Users\Admin\AppData\Local\Temp\rfq1960.exe"

Network

Country Destination Domain Proto
SG 172.93.218.178:45667 tcp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp

Files

memory/2452-0-0x0000000074D1E000-0x0000000074D1F000-memory.dmp

memory/2452-1-0x0000000000990000-0x0000000000A78000-memory.dmp

memory/2452-2-0x0000000074D10000-0x00000000753FE000-memory.dmp

memory/2452-3-0x0000000000400000-0x000000000041A000-memory.dmp

memory/2452-4-0x0000000000910000-0x000000000091E000-memory.dmp

memory/2452-5-0x0000000005550000-0x000000000560E000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpD5C6.tmp

MD5 5357a9f4b2d2b1d2f764462e01da05ff
SHA1 a6ba1edaf209e44e2bf5bf29ecd957c8e6b39a08
SHA256 d04a0337e8fb2895b935594876af5fe7cb1f5e3139ab6d49e04965288166ac0a
SHA512 19038f942facac8822b03acc7e7c9b4aa566da02e3ae28dada68221d4f632d53c6d655d76e595ad65003e8ebafddee726a326d3b07f45b7545db395cfae5bcd2

memory/3056-17-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-16-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-23-0x0000000000400000-0x000000000047F000-memory.dmp

memory/2452-34-0x0000000074D10000-0x00000000753FE000-memory.dmp

memory/3056-33-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-32-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-31-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-30-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-29-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/3056-27-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-21-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-19-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-13-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-25-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-36-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-35-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-37-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-40-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-41-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-42-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-43-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-44-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-45-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-46-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3056-47-0x0000000000400000-0x000000000047F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-23 09:53

Reported

2024-07-23 09:56

Platform

win10v2004-20240709-en

Max time kernel

150s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\rfq1960.exe"

Signatures

Remcos

rat remcos

Command and Scripting Interpreter: PowerShell

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2636447293-1148739154-93880854-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\rfq1960.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4884 set thread context of 3848 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe

Enumerates physical storage devices

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4884 wrote to memory of 4436 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 4884 wrote to memory of 4436 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 4884 wrote to memory of 4436 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
PID 4884 wrote to memory of 4980 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Windows\SysWOW64\schtasks.exe
PID 4884 wrote to memory of 4980 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Windows\SysWOW64\schtasks.exe
PID 4884 wrote to memory of 4980 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Windows\SysWOW64\schtasks.exe
PID 4884 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 4884 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 4884 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 4884 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 4884 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 4884 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 4884 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 4884 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 4884 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 4884 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 4884 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe
PID 4884 wrote to memory of 3848 N/A C:\Users\Admin\AppData\Local\Temp\rfq1960.exe C:\Users\Admin\AppData\Local\Temp\rfq1960.exe

Processes

C:\Users\Admin\AppData\Local\Temp\rfq1960.exe

"C:\Users\Admin\AppData\Local\Temp\rfq1960.exe"

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

"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\TlykqEvmBV.exe"

C:\Windows\SysWOW64\schtasks.exe

"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TlykqEvmBV" /XML "C:\Users\Admin\AppData\Local\Temp\tmpAE41.tmp"

C:\Users\Admin\AppData\Local\Temp\rfq1960.exe

"C:\Users\Admin\AppData\Local\Temp\rfq1960.exe"

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 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
SG 172.93.218.178:45667 tcp
US 8.8.8.8:53 178.218.93.172.in-addr.arpa udp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp
US 8.8.8.8:53 50.33.237.178.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/4884-0-0x000000007485E000-0x000000007485F000-memory.dmp

memory/4884-1-0x0000000000750000-0x0000000000838000-memory.dmp

memory/4884-2-0x00000000058D0000-0x0000000005E74000-memory.dmp

memory/4884-3-0x0000000005230000-0x00000000052C2000-memory.dmp

memory/4884-4-0x00000000052E0000-0x00000000052EA000-memory.dmp

memory/4884-5-0x0000000074850000-0x0000000075000000-memory.dmp

memory/4884-6-0x0000000005650000-0x000000000566A000-memory.dmp

memory/4884-7-0x00000000058B0000-0x00000000058BE000-memory.dmp

memory/4884-8-0x00000000064C0000-0x000000000657E000-memory.dmp

memory/4884-9-0x0000000006770000-0x000000000680C000-memory.dmp

memory/4436-14-0x00000000025C0000-0x00000000025F6000-memory.dmp

memory/4436-17-0x0000000005050000-0x0000000005678000-memory.dmp

memory/4436-16-0x0000000074850000-0x0000000075000000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpAE41.tmp

MD5 48796050a01c5b6365146d05e03551a9
SHA1 e71de4042bc46987b8fd4aa2ca24b9ab66f1ba6c
SHA256 4e8984bd9686ea08b2303db96296b443d1623f51fe33cb3fb3bfc5ede9a3ff1e
SHA512 9d4449f1e78fc7adf8b94c5f885a993f3bdc423b2b746e06a4ecb12bed4b8cf20ff59e5221cc1ec01727e05f4c06fb3c70d1f07baea83ea2e9a639e15a59afff

memory/4436-18-0x0000000074850000-0x0000000075000000-memory.dmp

memory/3848-20-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3848-23-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3848-21-0x0000000000400000-0x000000000047F000-memory.dmp

memory/4884-26-0x0000000074850000-0x0000000075000000-memory.dmp

memory/4436-25-0x0000000074850000-0x0000000075000000-memory.dmp

memory/3848-24-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3848-19-0x0000000000400000-0x000000000047F000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_exhkmgju.nhw.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/4436-32-0x0000000005760000-0x0000000005782000-memory.dmp

memory/4436-33-0x0000000005800000-0x0000000005866000-memory.dmp

memory/4436-34-0x0000000005870000-0x00000000058D6000-memory.dmp

memory/4436-35-0x00000000058E0000-0x0000000005C34000-memory.dmp

memory/4436-40-0x0000000005F70000-0x0000000005F8E000-memory.dmp

memory/4436-41-0x0000000006000000-0x000000000604C000-memory.dmp

memory/3848-43-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3848-42-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3848-44-0x0000000000400000-0x000000000047F000-memory.dmp

memory/4436-47-0x0000000006530000-0x0000000006562000-memory.dmp

memory/4436-48-0x0000000071140000-0x000000007118C000-memory.dmp

memory/4436-58-0x0000000006510000-0x000000000652E000-memory.dmp

memory/4436-59-0x0000000006F60000-0x0000000007003000-memory.dmp

memory/4436-60-0x00000000078E0000-0x0000000007F5A000-memory.dmp

memory/4436-61-0x0000000007290000-0x00000000072AA000-memory.dmp

memory/4436-62-0x0000000007310000-0x000000000731A000-memory.dmp

memory/4436-63-0x0000000007510000-0x00000000075A6000-memory.dmp

memory/4436-64-0x0000000007490000-0x00000000074A1000-memory.dmp

memory/4436-65-0x00000000074C0000-0x00000000074CE000-memory.dmp

memory/4436-66-0x00000000074D0000-0x00000000074E4000-memory.dmp

memory/4436-67-0x00000000075D0000-0x00000000075EA000-memory.dmp

memory/4436-68-0x00000000075B0000-0x00000000075B8000-memory.dmp

memory/4436-71-0x0000000074850000-0x0000000075000000-memory.dmp

memory/3848-72-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3848-73-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3848-74-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3848-75-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3848-76-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3848-77-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3848-78-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3848-79-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3848-80-0x0000000000400000-0x000000000047F000-memory.dmp