Malware Analysis Report

2025-01-02 03:13

Sample ID 240812-zxhbvazdpn
Target new.exe
SHA256 c0655fbc9631b46f22ca1e61594e98e4ce4061e51a63ccae5d112ac74fa3ff6c
Tags
remotehost remcos discovery evasion persistence rat trojan
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 Overview

score
10/10

SHA256

c0655fbc9631b46f22ca1e61594e98e4ce4061e51a63ccae5d112ac74fa3ff6c

Threat Level: Known bad

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

Malicious Activity Summary

remotehost remcos discovery evasion persistence rat trojan

UAC bypass

Remcos

Remcos family

Checks computer location settings

Executes dropped EXE

Adds Run key to start application

Drops file in System32 directory

Suspicious use of SetThreadContext

Unsigned PE

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Modifies registry key

Suspicious behavior: EnumeratesProcesses

Modifies registry class

Suspicious behavior: MapViewOfSection

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-12 21:05

Signatures

Remcos family

remcos

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-12 21:05

Reported

2024-08-12 21:08

Platform

win10v2004-20240802-en

Max time kernel

148s

Max time network

150s

Command Line

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

Signatures

Remcos

rat remcos

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Windows\SysWOW64\reg.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Windows\SysWOW64\reg.exe N/A
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Windows\SysWOW64\reg.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\new.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\Windows\Windows.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-3IZME9 = "\"C:\\Windows\\SysWOW64\\Windows\\Windows.exe\"" C:\Users\Admin\AppData\Local\Temp\new.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-3IZME9 = "\"C:\\Windows\\SysWOW64\\Windows\\Windows.exe\"" C:\Users\Admin\AppData\Local\Temp\new.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-3IZME9 = "\"C:\\Windows\\SysWOW64\\Windows\\Windows.exe\"" C:\Windows\SysWOW64\Windows\Windows.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-3IZME9 = "\"C:\\Windows\\SysWOW64\\Windows\\Windows.exe\"" C:\Windows\SysWOW64\Windows\Windows.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-3IZME9 = "\"C:\\Windows\\SysWOW64\\Windows\\Windows.exe\"" \??\c:\program files (x86)\internet explorer\iexplore.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-3IZME9 = "\"C:\\Windows\\SysWOW64\\Windows\\Windows.exe\"" \??\c:\program files (x86)\internet explorer\iexplore.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\Windows\Windows.exe C:\Users\Admin\AppData\Local\Temp\new.exe N/A
File opened for modification C:\Windows\SysWOW64\Windows\Windows.exe C:\Users\Admin\AppData\Local\Temp\new.exe N/A
File opened for modification C:\Windows\SysWOW64\Windows C:\Users\Admin\AppData\Local\Temp\new.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4888 set thread context of 872 N/A C:\Windows\SysWOW64\Windows\Windows.exe \??\c:\program files (x86)\internet explorer\iexplore.exe
PID 872 set thread context of 4824 N/A \??\c:\program files (x86)\internet explorer\iexplore.exe C:\Windows\SysWOW64\svchost.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\SysWOW64\reg.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\reg.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\Windows\Windows.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\reg.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\new.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language \??\c:\program files (x86)\internet explorer\iexplore.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ C:\Users\Admin\AppData\Local\Temp\new.exe N/A

Modifies registry key

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\reg.exe N/A
N/A N/A C:\Windows\SysWOW64\reg.exe N/A
N/A N/A C:\Windows\SysWOW64\reg.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\Windows\Windows.exe N/A
N/A N/A C:\Windows\SysWOW64\Windows\Windows.exe N/A

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\Windows\Windows.exe N/A
N/A N/A \??\c:\program files (x86)\internet explorer\iexplore.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1828 wrote to memory of 3604 N/A C:\Users\Admin\AppData\Local\Temp\new.exe C:\Windows\SysWOW64\cmd.exe
PID 1828 wrote to memory of 3604 N/A C:\Users\Admin\AppData\Local\Temp\new.exe C:\Windows\SysWOW64\cmd.exe
PID 1828 wrote to memory of 3604 N/A C:\Users\Admin\AppData\Local\Temp\new.exe C:\Windows\SysWOW64\cmd.exe
PID 3604 wrote to memory of 456 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 3604 wrote to memory of 456 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 3604 wrote to memory of 456 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 1828 wrote to memory of 4888 N/A C:\Users\Admin\AppData\Local\Temp\new.exe C:\Windows\SysWOW64\Windows\Windows.exe
PID 1828 wrote to memory of 4888 N/A C:\Users\Admin\AppData\Local\Temp\new.exe C:\Windows\SysWOW64\Windows\Windows.exe
PID 1828 wrote to memory of 4888 N/A C:\Users\Admin\AppData\Local\Temp\new.exe C:\Windows\SysWOW64\Windows\Windows.exe
PID 4888 wrote to memory of 4692 N/A C:\Windows\SysWOW64\Windows\Windows.exe C:\Windows\SysWOW64\cmd.exe
PID 4888 wrote to memory of 4692 N/A C:\Windows\SysWOW64\Windows\Windows.exe C:\Windows\SysWOW64\cmd.exe
PID 4888 wrote to memory of 4692 N/A C:\Windows\SysWOW64\Windows\Windows.exe C:\Windows\SysWOW64\cmd.exe
PID 4888 wrote to memory of 872 N/A C:\Windows\SysWOW64\Windows\Windows.exe \??\c:\program files (x86)\internet explorer\iexplore.exe
PID 4888 wrote to memory of 872 N/A C:\Windows\SysWOW64\Windows\Windows.exe \??\c:\program files (x86)\internet explorer\iexplore.exe
PID 4888 wrote to memory of 872 N/A C:\Windows\SysWOW64\Windows\Windows.exe \??\c:\program files (x86)\internet explorer\iexplore.exe
PID 4888 wrote to memory of 872 N/A C:\Windows\SysWOW64\Windows\Windows.exe \??\c:\program files (x86)\internet explorer\iexplore.exe
PID 872 wrote to memory of 2252 N/A \??\c:\program files (x86)\internet explorer\iexplore.exe C:\Windows\SysWOW64\cmd.exe
PID 872 wrote to memory of 2252 N/A \??\c:\program files (x86)\internet explorer\iexplore.exe C:\Windows\SysWOW64\cmd.exe
PID 872 wrote to memory of 2252 N/A \??\c:\program files (x86)\internet explorer\iexplore.exe C:\Windows\SysWOW64\cmd.exe
PID 872 wrote to memory of 4824 N/A \??\c:\program files (x86)\internet explorer\iexplore.exe C:\Windows\SysWOW64\svchost.exe
PID 872 wrote to memory of 4824 N/A \??\c:\program files (x86)\internet explorer\iexplore.exe C:\Windows\SysWOW64\svchost.exe
PID 872 wrote to memory of 4824 N/A \??\c:\program files (x86)\internet explorer\iexplore.exe C:\Windows\SysWOW64\svchost.exe
PID 872 wrote to memory of 4824 N/A \??\c:\program files (x86)\internet explorer\iexplore.exe C:\Windows\SysWOW64\svchost.exe
PID 4692 wrote to memory of 2640 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 4692 wrote to memory of 2640 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 4692 wrote to memory of 2640 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 2252 wrote to memory of 3848 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 2252 wrote to memory of 3848 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe
PID 2252 wrote to memory of 3848 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\reg.exe

Processes

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

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

C:\Windows\SysWOW64\cmd.exe

/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f

C:\Windows\SysWOW64\reg.exe

C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f

C:\Windows\SysWOW64\Windows\Windows.exe

"C:\Windows\SysWOW64\Windows\Windows.exe"

C:\Windows\SysWOW64\cmd.exe

/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f

\??\c:\program files (x86)\internet explorer\iexplore.exe

"c:\program files (x86)\internet explorer\iexplore.exe"

C:\Windows\SysWOW64\cmd.exe

/k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f

C:\Windows\SysWOW64\svchost.exe

svchost.exe

C:\Windows\SysWOW64\reg.exe

C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f

C:\Windows\SysWOW64\reg.exe

C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f

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 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 k-peterson.gl.at.ply.gg udp
US 147.185.221.21:64076 k-peterson.gl.at.ply.gg tcp
US 8.8.8.8:53 25.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 21.221.185.147.in-addr.arpa udp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 147.185.221.21:64076 k-peterson.gl.at.ply.gg tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 147.185.221.21:64076 k-peterson.gl.at.ply.gg tcp
US 8.8.8.8:53 99.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 147.185.221.21:64076 k-peterson.gl.at.ply.gg tcp
US 147.185.221.21:64076 k-peterson.gl.at.ply.gg tcp
US 8.8.8.8:53 43.229.111.52.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 10.27.171.150.in-addr.arpa udp
US 147.185.221.21:64076 k-peterson.gl.at.ply.gg tcp
US 147.185.221.21:64076 k-peterson.gl.at.ply.gg tcp
US 147.185.221.21:64076 k-peterson.gl.at.ply.gg tcp

Files

C:\Windows\SysWOW64\Windows\Windows.exe

MD5 ef2d8a16de6f9ecc5c53fd1fb3f5156a
SHA1 2646722bb3cff01dfd3276ef94be73ab0c065e4d
SHA256 c0655fbc9631b46f22ca1e61594e98e4ce4061e51a63ccae5d112ac74fa3ff6c
SHA512 8a4f6bd37d1e0161b11d8161c1f564f6cd7a1931beb74727a905eb408379189fecff1334201174eca7c422d32777f1baf169c45d8d90ab4cd11040d396b22446

memory/872-33-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-34-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-35-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-39-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-36-0x0000000000500000-0x0000000000582000-memory.dmp

memory/4824-40-0x00000000012F0000-0x0000000001372000-memory.dmp

memory/4824-41-0x00000000012F0000-0x0000000001372000-memory.dmp

memory/872-42-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-43-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-44-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-45-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-46-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-47-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-48-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-49-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-50-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-51-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-52-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-53-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-54-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-55-0x0000000000500000-0x0000000000582000-memory.dmp

memory/872-56-0x0000000000500000-0x0000000000582000-memory.dmp