Malware Analysis Report

2025-01-02 03:19

Sample ID 240326-2x47qaee28
Target 9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c
SHA256 9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c
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

9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c

Threat Level: Known bad

The file 9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c was found to be: Known bad.

Malicious Activity Summary

remcos remotehost rat

Remcos

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

Detects executables packed with SmartAssembly

Suspicious use of SetThreadContext

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-03-26 22:58

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-26 22:58

Reported

2024-03-26 23:01

Platform

win7-20240221-en

Max time kernel

149s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe"

Signatures

Remcos

rat remcos

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

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

Detects executables packed with SmartAssembly

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1524 wrote to memory of 2564 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1524 wrote to memory of 2564 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1524 wrote to memory of 2564 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1524 wrote to memory of 2564 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1524 wrote to memory of 2564 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1524 wrote to memory of 2564 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1524 wrote to memory of 2564 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1524 wrote to memory of 2564 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1524 wrote to memory of 2564 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1524 wrote to memory of 2564 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1524 wrote to memory of 2564 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1524 wrote to memory of 2564 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1524 wrote to memory of 2564 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe

Processes

C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe

"C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe"

C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe

"C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe"

Network

Country Destination Domain Proto
FR 176.31.142.221:4377 tcp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp

Files

memory/1524-1-0x0000000074C00000-0x00000000752EE000-memory.dmp

memory/1524-0-0x0000000000970000-0x0000000000A6A000-memory.dmp

memory/1524-2-0x0000000004A20000-0x0000000004A60000-memory.dmp

memory/1524-3-0x00000000002E0000-0x00000000002F2000-memory.dmp

memory/1524-4-0x0000000000300000-0x000000000030C000-memory.dmp

memory/1524-5-0x0000000005520000-0x00000000055E0000-memory.dmp

memory/2564-7-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-6-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-11-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-10-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-13-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-12-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-8-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-9-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-17-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2564-19-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-21-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1524-20-0x0000000074C00000-0x00000000752EE000-memory.dmp

memory/2564-22-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-24-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-23-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-25-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-27-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-29-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-28-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-30-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-31-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-32-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-33-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-34-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2564-35-0x0000000000400000-0x0000000000482000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-26 22:58

Reported

2024-03-26 23:01

Platform

win10v2004-20240226-en

Max time kernel

150s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe"

Signatures

Remcos

rat remcos

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

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

Detects executables packed with SmartAssembly

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1368 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1368 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1368 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1368 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1368 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1368 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1368 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1368 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1368 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1368 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1368 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe
PID 1368 wrote to memory of 864 N/A C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe

Processes

C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe

"C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe"

C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe

"C:\Users\Admin\AppData\Local\Temp\9ca3843ebfe01a5992bbe97e668f55179d915f634fe41cb11aa95fd7745fbc8c.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
FR 176.31.142.221:4377 tcp
US 8.8.8.8:53 221.142.31.176.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 8.8.8.8:53 178.223.142.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 25.211.222.173.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 16.173.189.20.in-addr.arpa udp

Files

memory/1368-0-0x0000000000610000-0x000000000070A000-memory.dmp

memory/1368-1-0x0000000074D00000-0x00000000754B0000-memory.dmp

memory/1368-2-0x0000000005680000-0x0000000005C24000-memory.dmp

memory/1368-3-0x0000000005170000-0x0000000005202000-memory.dmp

memory/1368-4-0x0000000005160000-0x0000000005170000-memory.dmp

memory/1368-5-0x0000000005110000-0x000000000511A000-memory.dmp

memory/1368-6-0x00000000053F0000-0x000000000548C000-memory.dmp

memory/1368-7-0x00000000052C0000-0x00000000052D2000-memory.dmp

memory/1368-8-0x00000000052E0000-0x00000000052EC000-memory.dmp

memory/1368-9-0x0000000006950000-0x0000000006A10000-memory.dmp

memory/864-10-0x0000000000400000-0x0000000000482000-memory.dmp

memory/864-12-0x0000000000400000-0x0000000000482000-memory.dmp

memory/1368-13-0x0000000074D00000-0x00000000754B0000-memory.dmp

memory/864-14-0x0000000000400000-0x0000000000482000-memory.dmp

memory/864-15-0x0000000000400000-0x0000000000482000-memory.dmp

memory/864-16-0x0000000000400000-0x0000000000482000-memory.dmp

memory/864-17-0x0000000000400000-0x0000000000482000-memory.dmp

memory/864-18-0x0000000000400000-0x0000000000482000-memory.dmp

memory/864-22-0x0000000000400000-0x0000000000482000-memory.dmp

memory/864-23-0x0000000000400000-0x0000000000482000-memory.dmp

memory/864-24-0x0000000000400000-0x0000000000482000-memory.dmp

memory/864-25-0x0000000000400000-0x0000000000482000-memory.dmp

memory/864-26-0x0000000000400000-0x0000000000482000-memory.dmp

memory/864-27-0x0000000000400000-0x0000000000482000-memory.dmp

memory/864-28-0x0000000000400000-0x0000000000482000-memory.dmp

memory/864-29-0x0000000000400000-0x0000000000482000-memory.dmp

memory/864-30-0x0000000000400000-0x0000000000482000-memory.dmp