Malware Analysis Report

2024-12-07 22:33

Sample ID 240409-qxgkwabf7s
Target ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118
SHA256 40ef0ea8d499ef74760da82a71c8cf548149e01826b62767c75431cc4cdad67f
Tags
remcos remotehost rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

40ef0ea8d499ef74760da82a71c8cf548149e01826b62767c75431cc4cdad67f

Threat Level: Known bad

The file ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

remcos remotehost rat

Remcos

Suspicious use of SetThreadContext

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-04-09 13:38

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-09 13:38

Reported

2024-04-09 13:40

Platform

win10v2004-20240226-en

Max time kernel

151s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe"

Signatures

Remcos

rat remcos

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 5276 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 5276 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 5276 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 5276 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 5276 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 5276 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 5276 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 5276 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 5276 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 5276 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 5276 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 5276 wrote to memory of 2964 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe

Processes

C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1324 --field-trial-handle=2280,i,1836084024518340990,18250262151825427757,262144 --variations-seed-version /prefetch:8

C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
GB 142.250.187.202:443 tcp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 28.143.109.104.in-addr.arpa udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 28.173.189.20.in-addr.arpa udp
US 8.8.8.8:53 ostriuyer.myddns.me udp
US 8.8.8.8:53 ostriuyer.myddns.me udp

Files

memory/5276-0-0x0000000074D00000-0x00000000754B0000-memory.dmp

memory/5276-1-0x00000000002F0000-0x0000000000400000-memory.dmp

memory/5276-2-0x0000000004D60000-0x0000000004DFC000-memory.dmp

memory/5276-3-0x00000000053B0000-0x0000000005954000-memory.dmp

memory/5276-4-0x0000000004EA0000-0x0000000004F32000-memory.dmp

memory/5276-5-0x0000000005120000-0x0000000005130000-memory.dmp

memory/5276-6-0x0000000004E60000-0x0000000004E6A000-memory.dmp

memory/5276-7-0x0000000005090000-0x00000000050E6000-memory.dmp

memory/5276-8-0x0000000005360000-0x000000000537A000-memory.dmp

memory/5276-9-0x0000000074D00000-0x00000000754B0000-memory.dmp

memory/5276-10-0x0000000005120000-0x0000000005130000-memory.dmp

memory/5276-11-0x0000000009100000-0x00000000091D6000-memory.dmp

memory/5276-12-0x0000000007C50000-0x0000000007CCA000-memory.dmp

memory/2964-13-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2964-14-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2964-16-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2964-17-0x0000000000400000-0x0000000000479000-memory.dmp

memory/5276-20-0x0000000074D00000-0x00000000754B0000-memory.dmp

memory/2964-19-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2964-21-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2964-22-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2964-28-0x0000000000400000-0x0000000000479000-memory.dmp

C:\Users\Admin\AppData\Roaming\remcos\logs.txt

MD5 a6b77c4714379725be77edfdd18ab021
SHA1 ffed10f0d68fc3a1890edb57b93008b334437acd
SHA256 0bf157cd06531a8178761f9fb525745fc136f14f984a7322444b4047fed1dd94
SHA512 fa7e1088b77ee80fee14e2f8d9aa359287ac229de6a3bac0660ad10f050fd40b77b1c06645734289c2964c752d957ac579e06dc84a812c4cfbe27ba09ac690dc

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-09 13:38

Reported

2024-04-09 13:40

Platform

win7-20240221-en

Max time kernel

149s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe"

Signatures

Remcos

rat remcos

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1928 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 1928 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 1928 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 1928 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 1928 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 1928 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 1928 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 1928 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 1928 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 1928 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 1928 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 1928 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe
PID 1928 wrote to memory of 2492 N/A C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe

Processes

C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe"

C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\ea1c39e72ae5c05ccb6caf2d94db2235_JaffaCakes118.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 ostriuyer.myddns.me udp

Files

memory/1928-0-0x00000000013D0000-0x00000000014E0000-memory.dmp

memory/1928-1-0x0000000074390000-0x0000000074A7E000-memory.dmp

memory/1928-2-0x00000000005F0000-0x0000000000630000-memory.dmp

memory/1928-3-0x00000000005D0000-0x00000000005EA000-memory.dmp

memory/1928-4-0x0000000074390000-0x0000000074A7E000-memory.dmp

memory/1928-5-0x00000000005F0000-0x0000000000630000-memory.dmp

memory/1928-6-0x0000000007CD0000-0x0000000007DA6000-memory.dmp

memory/1928-7-0x0000000004F70000-0x0000000004FEA000-memory.dmp

memory/2492-8-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2492-14-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2492-12-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2492-10-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2492-16-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2492-18-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2492-20-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2492-22-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2492-24-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2492-26-0x0000000000400000-0x0000000000479000-memory.dmp

memory/1928-29-0x0000000074390000-0x0000000074A7E000-memory.dmp

memory/2492-28-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2492-31-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2492-30-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2492-33-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2492-34-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2492-35-0x0000000000400000-0x0000000000479000-memory.dmp

memory/2492-41-0x0000000000400000-0x0000000000479000-memory.dmp

C:\Users\Admin\AppData\Roaming\remcos\logs.txt

MD5 ac1a6779b3dcb65db89f8af9e7f245f4
SHA1 393976c2fb481c13bbe49a1c61a0cdb64e47fb27
SHA256 3ab780f3db7fc63987ae6232e0bef454d8d9deb42aa63589891f9ffffcbe51d7
SHA512 a76399976a210a069454428d82b63332a8ff4a36804e4331bd0acd937c73ba406065c82dbcd0a5f63e59c3bf74c1b8f9f2242b404e95053260019793f44bb07b