Malware Analysis Report

2024-12-01 03:04

Sample ID 241108-de7ywswndq
Target 6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe
SHA256 6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931
Tags
remcos remotehost collection discovery 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

6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931

Threat Level: Known bad

The file 6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe was found to be: Known bad.

Malicious Activity Summary

remcos remotehost collection discovery rat

Remcos family

Remcos

Detected Nirsoft tools

NirSoft MailPassView

NirSoft WebBrowserPassView

Uses the VBS compiler for execution

Accesses Microsoft Outlook accounts

Suspicious use of SetThreadContext

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-08 02:56

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-08 02:56

Reported

2024-11-08 02:58

Platform

win7-20240903-en

Max time kernel

118s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe"

Signatures

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe

"C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe"

Network

N/A

Files

memory/1388-0-0x000007FEF5EB3000-0x000007FEF5EB4000-memory.dmp

memory/1388-1-0x0000000000020000-0x0000000000028000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-08 02:56

Reported

2024-11-08 02:58

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe"

Signatures

Remcos

rat remcos

Remcos family

remcos

Detected Nirsoft tools

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

NirSoft MailPassView

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

NirSoft WebBrowserPassView

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

Uses the VBS compiler for execution

Accesses Microsoft Outlook accounts

collection
Description Indicator Process Target
Key opened \REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe N/A

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\vbc.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4788 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 4788 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 4788 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 4788 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 4788 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 4788 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 4788 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 4788 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 4788 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 4788 wrote to memory of 3696 N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 4788 wrote to memory of 3820 N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 4788 wrote to memory of 3820 N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 4788 wrote to memory of 3820 N/A C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 3696 wrote to memory of 4980 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 3696 wrote to memory of 4980 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 3696 wrote to memory of 4980 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 3696 wrote to memory of 4980 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 3696 wrote to memory of 4052 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 3696 wrote to memory of 4052 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 3696 wrote to memory of 4052 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 3696 wrote to memory of 4052 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 3696 wrote to memory of 4232 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 3696 wrote to memory of 4232 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 3696 wrote to memory of 4232 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 3696 wrote to memory of 4232 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe

Processes

C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe

"C:\Users\Admin\AppData\Local\Temp\6910c4915fa2d986a3f33c072265e418db69bb0b0e4d799f0d08937d41cf4931.exe"

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

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

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

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

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

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\lbikdjvvywpcxocedamyxofh"

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

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\nwwcecgpmehpauqiulzsatzqxfx"

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

C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe /stext "C:\Users\Admin\AppData\Local\Temp\xybnxuyqamzukbnmevutlfuhgtpptlx"

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.ogc-oman.com udp
MY 103.186.117.77:2404 www.ogc-oman.com tcp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 68.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 77.117.186.103.in-addr.arpa udp
MY 103.186.117.77:2404 www.ogc-oman.com tcp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 50.33.237.178.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.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 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/4788-0-0x00007FFD651D3000-0x00007FFD651D5000-memory.dmp

memory/4788-1-0x0000026B6C1D0000-0x0000026B6C1D8000-memory.dmp

memory/4788-2-0x0000026B6DF30000-0x0000026B6E000000-memory.dmp

memory/4788-3-0x00007FFD651D0000-0x00007FFD65C91000-memory.dmp

memory/3696-4-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-5-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-6-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-10-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-11-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-12-0x0000000000400000-0x000000000047F000-memory.dmp

memory/4788-13-0x00007FFD651D0000-0x00007FFD65C91000-memory.dmp

memory/3696-14-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-15-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-16-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-17-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-19-0x0000000000400000-0x000000000047F000-memory.dmp

memory/4980-20-0x0000000000400000-0x0000000000478000-memory.dmp

memory/4052-22-0x0000000000400000-0x0000000000462000-memory.dmp

memory/4232-25-0x0000000000400000-0x0000000000424000-memory.dmp

memory/4980-31-0x0000000000400000-0x0000000000478000-memory.dmp

memory/4052-32-0x0000000000400000-0x0000000000462000-memory.dmp

memory/4052-30-0x0000000000400000-0x0000000000462000-memory.dmp

memory/4052-29-0x0000000000400000-0x0000000000462000-memory.dmp

memory/4232-27-0x0000000000400000-0x0000000000424000-memory.dmp

memory/4980-24-0x0000000000400000-0x0000000000478000-memory.dmp

memory/4980-28-0x0000000000400000-0x0000000000478000-memory.dmp

memory/4232-26-0x0000000000400000-0x0000000000424000-memory.dmp

memory/4980-37-0x0000000000400000-0x0000000000478000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\lbikdjvvywpcxocedamyxofh

MD5 79f35c7500a5cc739c1974804710441f
SHA1 24fdf1fa45049fc1a83925c45357bc3058bad060
SHA256 897101ed9da25ab0f10e8ad1aeb8dabc3282ccfdb6d3171dbac758117b8731f4
SHA512 03281e8abecff4e7d1f563596a4fd2513e016b7fbf011a455141460f9448d00b4a4666d2036cb448a8ac9a6feebeb51b366289ffa2ee5524a062fe8869aec61e

memory/3696-39-0x0000000010000000-0x0000000010019000-memory.dmp

memory/3696-43-0x0000000010000000-0x0000000010019000-memory.dmp

memory/3696-44-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-42-0x0000000010000000-0x0000000010019000-memory.dmp

memory/3696-46-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-48-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-49-0x0000000000400000-0x000000000047F000-memory.dmp

C:\ProgramData\remcthfufn\logs.dat

MD5 e9358826ecaffeba3601d45682905f5c
SHA1 6fe3a5f14afb9fa0e85813fd1153995c12b0fc24
SHA256 ab6e7cebeb588daf85027f2bbb513dee69d19226556f2e513413381633a9edf0
SHA512 158bb8ee0c69ea5fc07445bdaebe9467e1aee052f5b7a8f4f797b0abf13297cc5f34646c38b8cb6072170414380930ac75345abe6f7b0289bd4bf5acb4112594

memory/3696-56-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-57-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-65-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-64-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-72-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-73-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-80-0x0000000000400000-0x000000000047F000-memory.dmp

memory/3696-81-0x0000000000400000-0x000000000047F000-memory.dmp