Malware Analysis Report

2025-01-02 03:23

Sample ID 240723-j5mzaswdmd
Target MalwareBazaar.10
SHA256 46a534c55f60d8e902a84484a2c0d4bb750d0eb926ebab10117160c1f1aa0081
Tags
remcos zip 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

46a534c55f60d8e902a84484a2c0d4bb750d0eb926ebab10117160c1f1aa0081

Threat Level: Known bad

The file MalwareBazaar.10 was found to be: Known bad.

Malicious Activity Summary

remcos zip rat

Remcos

Uses the VBS compiler for execution

Suspicious use of SetThreadContext

Program crash

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-07-23 08:15

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-07-23 08:15

Reported

2024-07-23 08:17

Platform

win7-20240704-en

Max time kernel

147s

Max time network

148s

Command Line

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

Signatures

Remcos

rat remcos

Uses the VBS compiler for execution

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 836 set thread context of 2700 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Program Files (x86)\Windows Mail\wab.exe

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 836 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
PID 836 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
PID 836 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
PID 836 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
PID 836 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
PID 836 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
PID 836 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
PID 836 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
PID 836 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
PID 836 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
PID 836 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
PID 836 wrote to memory of 2528 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
PID 836 wrote to memory of 2260 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 836 wrote to memory of 2260 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 836 wrote to memory of 2260 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 836 wrote to memory of 2260 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 836 wrote to memory of 2260 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 836 wrote to memory of 2260 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 836 wrote to memory of 2260 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 836 wrote to memory of 2260 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 836 wrote to memory of 2260 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 836 wrote to memory of 2260 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 836 wrote to memory of 2260 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 836 wrote to memory of 2260 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
PID 836 wrote to memory of 2796 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 836 wrote to memory of 2796 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 836 wrote to memory of 2796 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 836 wrote to memory of 2796 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 836 wrote to memory of 2808 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\System32\calc.exe
PID 836 wrote to memory of 2808 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\System32\calc.exe
PID 836 wrote to memory of 2808 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\System32\calc.exe
PID 836 wrote to memory of 2808 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\System32\calc.exe
PID 836 wrote to memory of 2808 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\System32\calc.exe
PID 836 wrote to memory of 2808 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\System32\calc.exe
PID 836 wrote to memory of 2808 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\System32\calc.exe
PID 836 wrote to memory of 2808 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\System32\calc.exe
PID 836 wrote to memory of 2808 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\System32\calc.exe
PID 836 wrote to memory of 2808 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\System32\calc.exe
PID 836 wrote to memory of 2808 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\System32\calc.exe
PID 836 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 836 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 836 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 836 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 836 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 836 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 836 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 836 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 836 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 836 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 836 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 836 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
PID 836 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 836 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 836 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 836 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 836 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 836 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 836 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 836 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 836 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 836 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 836 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 836 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Program Files (x86)\Windows Mail\wab.exe
PID 836 wrote to memory of 2700 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Program Files (x86)\Windows Mail\wab.exe

Processes

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

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

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

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

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

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

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

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

C:\Windows\System32\calc.exe

"C:\Windows\System32\calc.exe"

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

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

C:\Program Files (x86)\Windows Mail\wab.exe

"C:\Program Files (x86)\Windows Mail\wab.exe"

C:\Program Files (x86)\Windows Mail\wab.exe

"C:\Program Files (x86)\Windows Mail\wab.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 vegetachcnc.com udp
US 107.173.4.18:2556 vegetachcnc.com tcp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp

Files

memory/836-0-0x000007FEF5993000-0x000007FEF5994000-memory.dmp

memory/836-1-0x0000000000070000-0x000000000007A000-memory.dmp

memory/836-2-0x000000001AD10000-0x000000001ADE2000-memory.dmp

memory/836-3-0x000007FEF5990000-0x000007FEF637C000-memory.dmp

memory/2528-5-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2528-4-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2528-6-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2528-7-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2528-11-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2528-15-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2528-13-0x0000000000400000-0x0000000000482000-memory.dmp

memory/2528-9-0x0000000000400000-0x0000000000482000-memory.dmp

memory/836-72-0x000007FEF5990000-0x000007FEF637C000-memory.dmp

memory/2700-71-0x0000000000400000-0x0000000000482000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-07-23 08:15

Reported

2024-07-23 08:18

Platform

win10v2004-20240709-en

Max time kernel

148s

Max time network

151s

Command Line

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

Signatures

Remcos

rat remcos

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4480 set thread context of 752 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4480 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe
PID 4480 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe
PID 4480 wrote to memory of 1980 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_wp.exe
PID 4480 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4480 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4480 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4480 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4480 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4480 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4480 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4480 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4480 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4480 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4480 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4480 wrote to memory of 752 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4480 wrote to memory of 4304 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4480 wrote to memory of 4304 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe
PID 4480 wrote to memory of 4304 N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\ilasm.exe

Processes

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

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

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

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

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

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

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 752 -ip 752

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 752 -s 20

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 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 75.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 24.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 21.236.111.52.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
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp

Files

memory/4480-0-0x000002D00FFD0000-0x000002D00FFDA000-memory.dmp

memory/4480-1-0x00007FF9D8383000-0x00007FF9D8385000-memory.dmp

memory/4480-2-0x000002D011CD0000-0x000002D011DA2000-memory.dmp

memory/4480-3-0x00007FF9D8380000-0x00007FF9D8E41000-memory.dmp

memory/4480-4-0x000002D02A470000-0x000002D02A542000-memory.dmp

memory/752-5-0x0000000000400000-0x0000000000482000-memory.dmp

memory/4480-6-0x00007FF9D8380000-0x00007FF9D8E41000-memory.dmp