Malware Analysis Report

2025-01-02 03:40

Sample ID 240509-m2ckyadh7y
Target 29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118
SHA256 4e55885791569c17891d8620a28b7563f441e0c80e875df828b33a5a006d544a
Tags
new remcos evasion 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

4e55885791569c17891d8620a28b7563f441e0c80e875df828b33a5a006d544a

Threat Level: Known bad

The file 29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

new remcos evasion persistence rat

Remcos family

Remcos

Identifies VirtualBox via ACPI registry values (likely anti-VM)

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Adds Run key to start application

Program crash

Suspicious use of SetThreadContext

Unsigned PE

Enumerates physical storage devices

Modifies registry class

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-09 10:57

Signatures

Remcos family

remcos

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-09 10:57

Reported

2024-05-09 10:59

Platform

win7-20240508-en

Max time kernel

141s

Max time network

141s

Command Line

"C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe"

Signatures

Remcos

rat remcos

Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe N/A

Loads dropped DLL

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Windows\CurrentVersion\Run\syscmd = "\"C:\\Users\\Admin\\AppData\\Roaming\\Syscmd\\syscmd.exe\"" C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Windows\CurrentVersion\Run\syscmd = "\"C:\\Users\\Admin\\AppData\\Roaming\\Syscmd\\syscmd.exe\"" C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe N/A

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3056 wrote to memory of 1544 N/A C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 3056 wrote to memory of 1544 N/A C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 3056 wrote to memory of 1544 N/A C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 3056 wrote to memory of 1544 N/A C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 1544 wrote to memory of 2848 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 1544 wrote to memory of 2848 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 1544 wrote to memory of 2848 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 1544 wrote to memory of 2848 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2848 wrote to memory of 2148 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe
PID 2848 wrote to memory of 2148 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe
PID 2848 wrote to memory of 2148 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe
PID 2848 wrote to memory of 2148 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe
PID 2148 wrote to memory of 2660 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2148 wrote to memory of 2660 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2148 wrote to memory of 2660 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2148 wrote to memory of 2660 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe

Processes

C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe"

C:\Windows\SysWOW64\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe"

C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe

C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe

C:\Program Files (x86)\Internet Explorer\iexplore.exe

"C:\Program Files (x86)\Internet Explorer\iexplore.exe"

Network

Country Destination Domain Proto
FR 195.154.242.51:2404 tcp
FR 195.154.242.51:2404 tcp
FR 195.154.242.51:2404 tcp
FR 195.154.242.51:2404 tcp
FR 195.154.242.51:2404 tcp
FR 195.154.242.51:2404 tcp

Files

C:\Users\Admin\AppData\Local\Temp\install.vbs

MD5 a188db36cc78c3a687fefe769400911f
SHA1 c76a6749da9941cabadbf26399ee950aa4dc2782
SHA256 66ba60e9d8ecda66fcee8ce0a80855a67e14704f823d5c058751746208e7d4d3
SHA512 9587847ede7ad801c22eb2d1c3ffdc09aec9fd249b5835ba40b75b150ae87982b13e7828cd9e11290db8a8e28dec02a1b3a712de9694a24349c75b190857f929

\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe

MD5 29a0d1bc5abfbbf0bdf15ffa762cac27
SHA1 76d716d41e3387f6a8854cdbda653efe844e2262
SHA256 4e55885791569c17891d8620a28b7563f441e0c80e875df828b33a5a006d544a
SHA512 05dcf37e6425a932fe55099767aab0c4a6de6ee2b1fbf2abde61e442ef8dc4d71a3e3c88b75b54e3bc9c8864d65ff68c2ba3d4c718bf0b563f80ed9b7dfa3413

C:\Users\Admin\AppData\Roaming\Syscmd\logs.dat

MD5 97333fd24793cb730455176fb32be9e4
SHA1 48841d737f10581e514c5567afb1ac0f064f2794
SHA256 86ce735e2ed2d9d33247810caba22af46933cdfa10479b0e08547c4395ea96ed
SHA512 6437981379ae9e312fb9dff5849a385ba95b71cbad70972988f48ce0d650626b7f6790dd5b6a05bd5549ee8d38b683f81e3c497cbdc7678b85f7bbb52cf8a844

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-09 10:57

Reported

2024-05-09 10:59

Platform

win10v2004-20240508-en

Max time kernel

93s

Max time network

96s

Command Line

"C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe"

Signatures

Remcos

rat remcos

Identifies VirtualBox via ACPI registry values (likely anti-VM)

evasion
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe N/A
Key opened \REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__ C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Windows\SysWOW64\WScript.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\syscmd = "\"C:\\Users\\Admin\\AppData\\Roaming\\Syscmd\\syscmd.exe\"" C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\syscmd = "\"C:\\Users\\Admin\\AppData\\Roaming\\Syscmd\\syscmd.exe\"" C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1996 set thread context of 1948 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000_Classes\Local Settings C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4204 wrote to memory of 4272 N/A C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 4204 wrote to memory of 4272 N/A C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 4204 wrote to memory of 4272 N/A C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 4272 wrote to memory of 4580 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 4272 wrote to memory of 4580 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 4272 wrote to memory of 4580 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 4580 wrote to memory of 1996 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe
PID 4580 wrote to memory of 1996 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe
PID 4580 wrote to memory of 1996 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe
PID 1996 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1996 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1996 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1996 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1996 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1996 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1996 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1996 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1996 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 1996 wrote to memory of 1948 N/A C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe

Processes

C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\29a0d1bc5abfbbf0bdf15ffa762cac27_JaffaCakes118.exe"

C:\Windows\SysWOW64\WScript.exe

"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe"

C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe

C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe

C:\Program Files (x86)\Internet Explorer\iexplore.exe

"C:\Program Files (x86)\Internet Explorer\iexplore.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1948 -ip 1948

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1948 -s 536

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
BE 2.17.196.113:443 www.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 113.196.17.2.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 57.15.31.184.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\install.vbs

MD5 a188db36cc78c3a687fefe769400911f
SHA1 c76a6749da9941cabadbf26399ee950aa4dc2782
SHA256 66ba60e9d8ecda66fcee8ce0a80855a67e14704f823d5c058751746208e7d4d3
SHA512 9587847ede7ad801c22eb2d1c3ffdc09aec9fd249b5835ba40b75b150ae87982b13e7828cd9e11290db8a8e28dec02a1b3a712de9694a24349c75b190857f929

C:\Users\Admin\AppData\Roaming\Syscmd\syscmd.exe

MD5 29a0d1bc5abfbbf0bdf15ffa762cac27
SHA1 76d716d41e3387f6a8854cdbda653efe844e2262
SHA256 4e55885791569c17891d8620a28b7563f441e0c80e875df828b33a5a006d544a
SHA512 05dcf37e6425a932fe55099767aab0c4a6de6ee2b1fbf2abde61e442ef8dc4d71a3e3c88b75b54e3bc9c8864d65ff68c2ba3d4c718bf0b563f80ed9b7dfa3413

memory/1948-9-0x0000000000400000-0x000000000041E000-memory.dmp