Malware Analysis Report

2024-11-13 18:51

Sample ID 240519-za3z2agf2s
Target 5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118
SHA256 b2d23e455eb56451966097d786f7b7e3a056e693f7811b179147da1603850aef
Tags
remcos 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

b2d23e455eb56451966097d786f7b7e3a056e693f7811b179147da1603850aef

Threat Level: Known bad

The file 5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

remcos persistence rat

Remcos

Adds Run key to start application

Enumerates connected drives

Suspicious use of SetThreadContext

Unsigned PE

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-19 20:31

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-19 20:31

Reported

2024-05-19 20:34

Platform

win7-20240221-en

Max time kernel

145s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe"

Signatures

Remcos

rat remcos

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\Microsoft OneDrive = "C:\\Users\\Admin\\AppData\\Local\\Chrome\\StikyNot.exe" C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\G: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\S: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\Y: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\Z: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\A: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\I: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\O: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\P: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\U: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\E: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\H: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\L: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\M: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\N: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\T: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\V: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\B: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\J: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\K: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\Q: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\R: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\W: C:\Windows\system32\mstsc.exe N/A
File opened (read-only) \??\X: C:\Windows\system32\mstsc.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 340 set thread context of 2580 N/A C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe C:\Windows\SysWOW64\mstsc.exe
PID 2580 set thread context of 2708 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Windows\system32\mstsc.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 340 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe C:\Windows\SysWOW64\mstsc.exe
PID 340 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe C:\Windows\SysWOW64\mstsc.exe
PID 340 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe C:\Windows\SysWOW64\mstsc.exe
PID 340 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe C:\Windows\SysWOW64\mstsc.exe
PID 340 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe C:\Windows\SysWOW64\mstsc.exe
PID 340 wrote to memory of 2580 N/A C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe C:\Windows\SysWOW64\mstsc.exe
PID 2580 wrote to memory of 2708 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2580 wrote to memory of 2708 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2580 wrote to memory of 2708 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2580 wrote to memory of 2708 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2580 wrote to memory of 2708 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2580 wrote to memory of 2708 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2580 wrote to memory of 2708 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2580 wrote to memory of 2708 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2580 wrote to memory of 2708 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2580 wrote to memory of 2708 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 2708 wrote to memory of 2592 N/A C:\Program Files (x86)\Internet Explorer\iexplore.exe C:\Windows\system32\mstsc.exe
PID 2708 wrote to memory of 2592 N/A C:\Program Files (x86)\Internet Explorer\iexplore.exe C:\Windows\system32\mstsc.exe
PID 2708 wrote to memory of 2592 N/A C:\Program Files (x86)\Internet Explorer\iexplore.exe C:\Windows\system32\mstsc.exe
PID 2708 wrote to memory of 2592 N/A C:\Program Files (x86)\Internet Explorer\iexplore.exe C:\Windows\system32\mstsc.exe

Processes

C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe"

C:\Windows\SysWOW64\mstsc.exe

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

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

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

C:\Windows\system32\mstsc.exe

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

Network

N/A

Files

memory/340-0-0x0000000000400000-0x0000000000538000-memory.dmp

memory/340-2-0x0000000000535000-0x0000000000536000-memory.dmp

memory/340-1-0x0000000000400000-0x0000000000538000-memory.dmp

memory/340-3-0x0000000000400000-0x0000000000538000-memory.dmp

memory/340-4-0x0000000000400000-0x0000000000538000-memory.dmp

memory/340-5-0x0000000000400000-0x0000000000538000-memory.dmp

memory/340-6-0x0000000000400000-0x0000000000538000-memory.dmp

memory/340-7-0x0000000000535000-0x0000000000536000-memory.dmp

memory/2580-12-0x0000000000400000-0x0000000000421000-memory.dmp

memory/340-16-0x0000000000400000-0x0000000000538000-memory.dmp

memory/2580-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2580-8-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2580-17-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2708-18-0x0000000001000000-0x0000000001104000-memory.dmp

memory/2580-19-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2592-20-0x0000000001E50000-0x0000000001E51000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-19 20:31

Reported

2024-05-19 20:34

Platform

win10v2004-20240426-en

Max time kernel

148s

Max time network

156s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe"

Signatures

Remcos

rat remcos

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft OneDrive = "C:\\Users\\Admin\\AppData\\Local\\Chrome\\StikyNot.exe" C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2452 set thread context of 844 N/A C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe C:\Windows\SysWOW64\mstsc.exe
PID 844 set thread context of 4552 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2452 wrote to memory of 844 N/A C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe C:\Windows\SysWOW64\mstsc.exe
PID 2452 wrote to memory of 844 N/A C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe C:\Windows\SysWOW64\mstsc.exe
PID 2452 wrote to memory of 844 N/A C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe C:\Windows\SysWOW64\mstsc.exe
PID 2452 wrote to memory of 844 N/A C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe C:\Windows\SysWOW64\mstsc.exe
PID 2452 wrote to memory of 844 N/A C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe C:\Windows\SysWOW64\mstsc.exe
PID 844 wrote to memory of 4552 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 844 wrote to memory of 4552 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 844 wrote to memory of 4552 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 844 wrote to memory of 4552 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 844 wrote to memory of 4552 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 844 wrote to memory of 4552 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 844 wrote to memory of 4552 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 844 wrote to memory of 4552 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 844 wrote to memory of 4552 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 844 wrote to memory of 4552 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe
PID 844 wrote to memory of 4552 N/A C:\Windows\SysWOW64\mstsc.exe C:\Program Files (x86)\Internet Explorer\iexplore.exe

Processes

C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\5b51fcb93e6d3718bba97e531ba8ad2d_JaffaCakes118.exe"

C:\Windows\SysWOW64\mstsc.exe

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

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

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

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 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 25.24.18.2.in-addr.arpa udp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 194.61.62.23.in-addr.arpa udp
NL 23.62.61.194:443 www.bing.com tcp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.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 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 30.73.42.20.in-addr.arpa udp

Files

memory/2452-0-0x0000000000400000-0x0000000000538000-memory.dmp

memory/2452-2-0x0000000000400000-0x0000000000538000-memory.dmp

memory/2452-3-0x0000000000400000-0x0000000000538000-memory.dmp

memory/2452-4-0x0000000000535000-0x0000000000536000-memory.dmp

memory/2452-1-0x0000000000400000-0x0000000000538000-memory.dmp

memory/2452-5-0x0000000000400000-0x0000000000538000-memory.dmp

memory/2452-6-0x0000000000400000-0x0000000000538000-memory.dmp

memory/844-7-0x0000000000400000-0x0000000000421000-memory.dmp

memory/2452-12-0x0000000000400000-0x0000000000538000-memory.dmp

memory/844-11-0x0000000000400000-0x0000000000421000-memory.dmp

memory/844-13-0x0000000000400000-0x0000000000421000-memory.dmp

memory/4552-14-0x0000000000400000-0x000000000053A000-memory.dmp

memory/844-15-0x0000000000400000-0x0000000000421000-memory.dmp