Malware Analysis Report

2025-01-02 03:12

Sample ID 240814-k8p4hathlh
Target .exe
SHA256 fef0bccaba1cf7fe16cd4c750e280e09ee68e95818fb3db648362dfaa47dc601
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

fef0bccaba1cf7fe16cd4c750e280e09ee68e95818fb3db648362dfaa47dc601

Threat Level: Known bad

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

Malicious Activity Summary

remcos remotehost discovery execution persistence rat

Remcos

Command and Scripting Interpreter: PowerShell

Checks computer location settings

Adds Run key to start application

Suspicious use of SetThreadContext

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-14 09:16

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-14 09:16

Reported

2024-08-14 09:19

Platform

win7-20240704-en

Max time kernel

148s

Max time network

151s

Command Line

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

Signatures

Remcos

rat remcos

Command and Scripting Interpreter: PowerShell

execution
Description Indicator Process Target
N/A N/A C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3294248377-1418901787-4083263181-1000\Software\Microsoft\Windows\CurrentVersion\Run\ = "C:\\Users\\Admin\\.exe" C:\Users\Admin\AppData\Local\Temp\.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2844 set thread context of 2592 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe

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\Microsoft.NET\Framework\v4.0.30319\jsc.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
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\.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 2844 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
PID 2844 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
PID 2844 wrote to memory of 2908 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
PID 2844 wrote to memory of 2732 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
PID 2844 wrote to memory of 2732 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
PID 2844 wrote to memory of 2732 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
PID 2844 wrote to memory of 2732 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
PID 2844 wrote to memory of 2732 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
PID 2844 wrote to memory of 2732 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
PID 2844 wrote to memory of 2732 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
PID 2844 wrote to memory of 2732 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
PID 2844 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2844 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2844 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2844 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2844 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2844 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2844 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2844 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2844 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2844 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2844 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2844 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 2844 wrote to memory of 2592 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe

Processes

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

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

C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath $env:UserProfile

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

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

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 eadzagba1.duckdns.org udp
US 198.46.178.133:4877 eadzagba1.duckdns.org tcp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp

Files

memory/2908-4-0x000007FEF5DBE000-0x000007FEF5DBF000-memory.dmp

memory/2908-5-0x000000001B5D0000-0x000000001B8B2000-memory.dmp

memory/2908-6-0x0000000002970000-0x0000000002978000-memory.dmp

memory/2908-7-0x000007FEF5B00000-0x000007FEF649D000-memory.dmp

memory/2908-8-0x000007FEF5B00000-0x000007FEF649D000-memory.dmp

memory/2908-9-0x000007FEF5B00000-0x000007FEF649D000-memory.dmp

memory/2908-11-0x000007FEF5B00000-0x000007FEF649D000-memory.dmp

memory/2908-12-0x000007FEF5B00000-0x000007FEF649D000-memory.dmp

memory/2908-13-0x000007FEF5B00000-0x000007FEF649D000-memory.dmp

memory/2592-14-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-18-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-17-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-16-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-19-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-20-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-21-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-22-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-25-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-26-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-27-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-28-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-30-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-31-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-33-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-32-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-34-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2592-35-0x0000000000400000-0x0000000000482000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-14 09:16

Reported

2024-08-14 09:19

Platform

win10v2004-20240802-en

Max time kernel

149s

Max time network

151s

Command Line

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

Signatures

Remcos

rat remcos

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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ = "C:\\Users\\Admin\\.exe" C:\Users\Admin\AppData\Local\Temp\.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4824 set thread context of 1208 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe

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\Microsoft.NET\Framework\v4.0.30319\jsc.exe N/A

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\.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 4824 wrote to memory of 3184 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
PID 4824 wrote to memory of 3184 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe
PID 4824 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 4824 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 4824 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 4824 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 4824 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 4824 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 4824 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 4824 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 4824 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 4824 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 4824 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
PID 4824 wrote to memory of 1208 N/A C:\Users\Admin\AppData\Local\Temp\.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe

Processes

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

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

C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe

"C:\Windows\system32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath $env:UserProfile

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

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

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4388,i,1828333185976713750,7918646547767660928,262144 --variations-seed-version --mojo-platform-channel-handle=4072 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 eadzagba1.duckdns.org udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 82.177.190.20.in-addr.arpa udp
US 198.46.178.133:4877 eadzagba1.duckdns.org tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 133.178.46.198.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 88.156.103.20.in-addr.arpa udp
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 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 147.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.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/3184-0-0x00007FF856E93000-0x00007FF856E95000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mwkesiqc.4jy.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/3184-10-0x000001BD6FFE0000-0x000001BD70002000-memory.dmp

memory/3184-11-0x00007FF856E90000-0x00007FF857951000-memory.dmp

memory/3184-12-0x00007FF856E90000-0x00007FF857951000-memory.dmp

memory/1208-14-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-15-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-16-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-17-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-18-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3184-21-0x00007FF856E90000-0x00007FF857951000-memory.dmp

memory/1208-22-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-23-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-24-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-25-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-27-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-28-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-29-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-30-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-31-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-33-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-34-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-35-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-36-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-37-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1208-38-0x0000000000400000-0x0000000000482000-memory.dmp