Malware Analysis Report

2024-12-07 22:48

Sample ID 240512-e82veacb42
Target 384aaa214d78f738940194fb363e1898_JaffaCakes118
SHA256 098fd9d5eb438af073651243c07bedcf9e1a1363f682bdefc124588d0cbf356a
Tags
remcos remc1 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

098fd9d5eb438af073651243c07bedcf9e1a1363f682bdefc124588d0cbf356a

Threat Level: Known bad

The file 384aaa214d78f738940194fb363e1898_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

remcos remc1 persistence rat

Remcos

Remcos family

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Adds Run key to start application

Suspicious use of SetThreadContext

Enumerates physical storage devices

Unsigned PE

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Modifies registry class

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-12 04:37

Signatures

Remcos family

remcos

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-12 04:37

Reported

2024-05-12 04:40

Platform

win7-20240419-en

Max time kernel

149s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe"

Signatures

Remcos

rat remcos

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.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-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Windows\CurrentVersion\Run\erwfguyhjnxcj = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remc\\Remc.exe\"" C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Windows\CurrentVersion\Run\erwfguyhjnxcj = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remc\\Remc.exe\"" C:\Users\Admin\AppData\Roaming\Remc\Remc.exe N/A

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1740 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 1740 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 1740 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 1740 wrote to memory of 2608 N/A C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 2608 wrote to memory of 2776 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2608 wrote to memory of 2776 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2608 wrote to memory of 2776 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2608 wrote to memory of 2776 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2776 wrote to memory of 2780 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Remc\Remc.exe
PID 2776 wrote to memory of 2780 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Remc\Remc.exe
PID 2776 wrote to memory of 2780 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Remc\Remc.exe
PID 2776 wrote to memory of 2780 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Remc\Remc.exe
PID 2780 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe
PID 2780 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe
PID 2780 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe
PID 2780 wrote to memory of 2888 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe

Processes

C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_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\Remc\Remc.exe"

C:\Users\Admin\AppData\Roaming\Remc\Remc.exe

C:\Users\Admin\AppData\Roaming\Remc\Remc.exe

C:\Windows\SysWOW64\svchost.exe

C:\Windows\SysWOW64\svchost.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 civita2.no-ip.biz udp

Files

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

MD5 837b54af2c8d285fb69d719cc9061206
SHA1 b31b75216a46b744eb0d89dd9885431a8ecde820
SHA256 353bf067c7071e2b6904205a0f6755433a8711a4b2a9b48ac32ff538463f0e46
SHA512 6cc4e846538cf16de26004343a157a565fe9730ad5c253e3fb6c64098405849e732bd2216fbdecd52cc3cbcb84e24e4dca23b5fd4f68bcdc0e73d485479e2311

C:\Users\Admin\AppData\Roaming\Remc\Remc.exe

MD5 384aaa214d78f738940194fb363e1898
SHA1 5106b7555c4340eda60742654f403ac73e36cd01
SHA256 098fd9d5eb438af073651243c07bedcf9e1a1363f682bdefc124588d0cbf356a
SHA512 4d4c505d6401a9f2a9f1c79dffa83c352911c0ca0d71e08799063ae91daed54bc48babc352532709fff9035de747f3b78f8232fad18d2a414ba64e1c8364e27a

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

MD5 9a1c5fc1ce2d011a1149d12b118dcf3a
SHA1 b847e439e59e5fa467c40d78f28c3b3ffb4da3e4
SHA256 a7f4fe9b473e2bd14e5f29672d81c6879e64119afef02110f1fa25c91090f166
SHA512 60f35efee796de02f8e7fd4dbe56a6421a8af7ad2f0768c8faa58f18a7399474a43c6e4627fc39b9b38acbd4ebf07f69134b47c898f5db30e35b51ffcae2ae89

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-12 04:37

Reported

2024-05-12 04:40

Platform

win10v2004-20240508-en

Max time kernel

149s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe"

Signatures

Remcos

rat remcos

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\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\Remc\Remc.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\erwfguyhjnxcj = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remc\\Remc.exe\"" C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\erwfguyhjnxcj = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remc\\Remc.exe\"" C:\Users\Admin\AppData\Roaming\Remc\Remc.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1232 set thread context of 1772 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000_Classes\Local Settings C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe N/A

Suspicious use of SetWindowsHookEx

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1560 wrote to memory of 976 N/A C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 1560 wrote to memory of 976 N/A C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 1560 wrote to memory of 976 N/A C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 976 wrote to memory of 3828 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 976 wrote to memory of 3828 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 976 wrote to memory of 3828 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 3828 wrote to memory of 1232 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Remc\Remc.exe
PID 3828 wrote to memory of 1232 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Remc\Remc.exe
PID 3828 wrote to memory of 1232 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Remc\Remc.exe
PID 1232 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe
PID 1232 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe
PID 1232 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe
PID 1232 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe
PID 1232 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe
PID 1232 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe
PID 1232 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe
PID 1232 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe
PID 1232 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe
PID 1232 wrote to memory of 1772 N/A C:\Users\Admin\AppData\Roaming\Remc\Remc.exe C:\Windows\SysWOW64\svchost.exe

Processes

C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\384aaa214d78f738940194fb363e1898_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\Remc\Remc.exe"

C:\Users\Admin\AppData\Roaming\Remc\Remc.exe

C:\Users\Admin\AppData\Roaming\Remc\Remc.exe

C:\Windows\SysWOW64\svchost.exe

C:\Windows\SysWOW64\svchost.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 --field-trial-handle=1748,i,4686244434963378549,11462511444150484980,262144 --variations-seed-version --mojo-platform-channel-handle=1404 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 civita2.no-ip.biz udp
NL 52.142.223.178:80 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 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 14.179.89.13.in-addr.arpa udp

Files

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

MD5 837b54af2c8d285fb69d719cc9061206
SHA1 b31b75216a46b744eb0d89dd9885431a8ecde820
SHA256 353bf067c7071e2b6904205a0f6755433a8711a4b2a9b48ac32ff538463f0e46
SHA512 6cc4e846538cf16de26004343a157a565fe9730ad5c253e3fb6c64098405849e732bd2216fbdecd52cc3cbcb84e24e4dca23b5fd4f68bcdc0e73d485479e2311

C:\Users\Admin\AppData\Roaming\Remc\Remc.exe

MD5 384aaa214d78f738940194fb363e1898
SHA1 5106b7555c4340eda60742654f403ac73e36cd01
SHA256 098fd9d5eb438af073651243c07bedcf9e1a1363f682bdefc124588d0cbf356a
SHA512 4d4c505d6401a9f2a9f1c79dffa83c352911c0ca0d71e08799063ae91daed54bc48babc352532709fff9035de747f3b78f8232fad18d2a414ba64e1c8364e27a

memory/1772-8-0x0000000000400000-0x000000000041E000-memory.dmp

memory/1772-10-0x0000000000400000-0x000000000041E000-memory.dmp

memory/1772-11-0x0000000000400000-0x000000000041E000-memory.dmp

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

MD5 e85f4908bf5440cdd69e619fdc7a417d
SHA1 6152af3a3302d52e28f7c6015bd7f46087d48043
SHA256 1f453aa240f04833adff038adf84a619f0120b5730222ab6c378e712c02590a6
SHA512 cc64b64fccd9fe4dcf29f8fe1c7eb26d3453e7d2aac5a0f13b6b0d94641e6a4cce379c59e6279222d1c8f00b54de45cd71eb352b78de732403207d0815abd583