Malware Analysis Report

2025-01-18 12:39

Sample ID 240403-2v6mrsfc8y
Target a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118
SHA256 d17dc5760a94c6a8d85b462dfe3cfdf40917e670513dadd5fd5eeaa9941106af
Tags
formbook cb2k rat spyware stealer 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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

d17dc5760a94c6a8d85b462dfe3cfdf40917e670513dadd5fd5eeaa9941106af

Threat Level: Known bad

The file a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

formbook cb2k rat spyware stealer trojan

Formbook

Formbook payload

Checks computer location settings

Suspicious use of SetThreadContext

Unsigned PE

Enumerates physical storage devices

Creates scheduled task(s)

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-03 22:55

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-03 22:55

Reported

2024-04-03 22:57

Platform

win7-20240221-en

Max time kernel

120s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe"

Signatures

Formbook

trojan spyware stealer formbook

Formbook payload

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

Enumerates physical storage devices

Creates scheduled task(s)

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

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1612 wrote to memory of 2828 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Windows\SysWOW64\schtasks.exe
PID 1612 wrote to memory of 2828 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Windows\SysWOW64\schtasks.exe
PID 1612 wrote to memory of 2828 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Windows\SysWOW64\schtasks.exe
PID 1612 wrote to memory of 2828 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Windows\SysWOW64\schtasks.exe
PID 1612 wrote to memory of 2560 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe
PID 1612 wrote to memory of 2560 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe
PID 1612 wrote to memory of 2560 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe
PID 1612 wrote to memory of 2560 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe
PID 1612 wrote to memory of 2560 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe
PID 1612 wrote to memory of 2560 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe
PID 1612 wrote to memory of 2560 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe"

C:\Windows\SysWOW64\schtasks.exe

"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uAWjkCh" /XML "C:\Users\Admin\AppData\Local\Temp\tmp21C3.tmp"

C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe"

Network

N/A

Files

memory/1612-0-0x00000000008A0000-0x000000000091E000-memory.dmp

memory/1612-1-0x0000000074050000-0x000000007473E000-memory.dmp

memory/1612-2-0x0000000004DA0000-0x0000000004DE0000-memory.dmp

memory/1612-3-0x00000000004F0000-0x00000000004FE000-memory.dmp

memory/1612-4-0x0000000074050000-0x000000007473E000-memory.dmp

memory/1612-5-0x0000000002030000-0x0000000002088000-memory.dmp

memory/2560-11-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2560-12-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2560-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2560-15-0x0000000000400000-0x000000000042F000-memory.dmp

memory/1612-16-0x0000000074050000-0x000000007473E000-memory.dmp

memory/2560-17-0x0000000000AB0000-0x0000000000DB3000-memory.dmp

memory/2560-18-0x0000000000AB0000-0x0000000000DB3000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-03 22:55

Reported

2024-04-03 22:58

Platform

win10v2004-20240226-en

Max time kernel

147s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe"

Signatures

Formbook

trojan spyware stealer formbook

Formbook payload

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

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3172 wrote to memory of 4296 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Windows\SysWOW64\schtasks.exe
PID 3172 wrote to memory of 4296 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Windows\SysWOW64\schtasks.exe
PID 3172 wrote to memory of 4296 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Windows\SysWOW64\schtasks.exe
PID 3172 wrote to memory of 3808 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe
PID 3172 wrote to memory of 3808 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe
PID 3172 wrote to memory of 3808 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe
PID 3172 wrote to memory of 3808 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe
PID 3172 wrote to memory of 3808 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe
PID 3172 wrote to memory of 3808 N/A C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe

Processes

C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe"

C:\Windows\SysWOW64\schtasks.exe

"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uAWjkCh" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4C66.tmp"

C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\a8e3b5b211ec454517c8d8fc7b0739e4_JaffaCakes118.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 44.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 195.201.50.20.in-addr.arpa udp

Files

memory/3172-1-0x0000000074BD0000-0x0000000075380000-memory.dmp

memory/3172-0-0x0000000000B90000-0x0000000000C0E000-memory.dmp

memory/3172-2-0x0000000005C70000-0x0000000006214000-memory.dmp

memory/3172-3-0x00000000055C0000-0x0000000005652000-memory.dmp

memory/3172-4-0x0000000005810000-0x0000000005820000-memory.dmp

memory/3172-5-0x0000000005660000-0x000000000566A000-memory.dmp

memory/3172-6-0x00000000069C0000-0x0000000006A5C000-memory.dmp

memory/3172-7-0x0000000005C00000-0x0000000005C0E000-memory.dmp

memory/3172-8-0x0000000074BD0000-0x0000000075380000-memory.dmp

memory/3172-9-0x0000000005810000-0x0000000005820000-memory.dmp

memory/3172-10-0x0000000006D60000-0x0000000006DB8000-memory.dmp

memory/3808-16-0x0000000000400000-0x000000000042F000-memory.dmp

memory/3172-18-0x0000000074BD0000-0x0000000075380000-memory.dmp

memory/3808-19-0x00000000014A0000-0x00000000017EA000-memory.dmp

memory/3808-20-0x00000000014A0000-0x00000000017EA000-memory.dmp