Malware Analysis Report

2025-01-02 03:40

Sample ID 240509-fh67waee85
Target 28615260996f2ee3bf717734f6714014_JaffaCakes118
SHA256 b312190adff333d7172e87d01dbb298ad7dbac987a6ad489fca561366161ee98
Tags
remcos persistence rat rem5
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

b312190adff333d7172e87d01dbb298ad7dbac987a6ad489fca561366161ee98

Threat Level: Known bad

The file 28615260996f2ee3bf717734f6714014_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

remcos persistence rat rem5

Remcos

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Adds Run key to start application

Suspicious use of SetThreadContext

Drops file in Windows directory

Enumerates physical storage devices

Unsigned PE

Suspicious use of SetWindowsHookEx

Modifies registry class

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-09 04:53

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-09 04:53

Reported

2024-05-09 04:57

Platform

win7-20240508-en

Max time kernel

150s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe"

Signatures

Remcos

rat remcos

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.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-1-5-21-2737914667-933161113-3798636211-1000\Software\Microsoft\Windows\CurrentVersion\Run\LKJhgtYGS = "\"C:\\Users\\Admin\\AppData\\Roaming\\Rem5\\Rem5.exe\"" C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-2737914667-933161113-3798636211-1000\Software\Microsoft\Windows\CurrentVersion\Run\LKJhgtYGS = "\"C:\\Users\\Admin\\AppData\\Roaming\\Rem5\\Rem5.exe\"" C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2468 set thread context of 2628 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\win.ini C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe N/A
File opened for modification C:\Windows\win.ini C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe N/A
File opened for modification C:\Windows\win.ini C:\Windows\SysWOW64\svchost.exe N/A

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2432 wrote to memory of 2300 N/A C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 2432 wrote to memory of 2300 N/A C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 2432 wrote to memory of 2300 N/A C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 2432 wrote to memory of 2300 N/A C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 2300 wrote to memory of 2712 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2300 wrote to memory of 2712 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2300 wrote to memory of 2712 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2300 wrote to memory of 2712 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 2712 wrote to memory of 2468 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe
PID 2712 wrote to memory of 2468 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe
PID 2712 wrote to memory of 2468 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe
PID 2712 wrote to memory of 2468 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe
PID 2468 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 2468 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 2468 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 2468 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 2468 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 2468 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 2468 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 2468 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 2468 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe

Processes

C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_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\Rem5\Rem5.exe"

C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe

C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe

C:\Windows\SysWOW64\svchost.exe

C:\Windows\SysWOW64\svchost.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 camglass.sytes.net udp
US 8.8.8.8:53 camvips.ddns.net udp

Files

memory/2432-3-0x00000000004D0000-0x00000000005D0000-memory.dmp

memory/2432-5-0x0000000002B90000-0x0000000002C90000-memory.dmp

memory/2432-6-0x00000000771A1000-0x00000000772A2000-memory.dmp

memory/2432-7-0x00000000771A0000-0x0000000077349000-memory.dmp

memory/2432-8-0x0000000000400000-0x000000000045A000-memory.dmp

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

MD5 4b309959125fb954b68968bad5bed9ac
SHA1 b2b805fa81f1b82fa07b718031c9a89046731146
SHA256 109742373d7cca30b46ef4b05d9b86694e2a54f862afd891e7bba50cf0f18830
SHA512 9d90d6f5085ac7103aee6679272b677589afe3a50835152f3c1f799080e38b975f3c246d6649926a80a7ee3bbcabf755d6a20cf768083714a359bc9a5af9cf92

C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe

MD5 28615260996f2ee3bf717734f6714014
SHA1 4d974c30ad0b91bbb81a3f4684d4c8216b602608
SHA256 b312190adff333d7172e87d01dbb298ad7dbac987a6ad489fca561366161ee98
SHA512 af93cc53e0b2299c63247e44c9ad25d065f23a7409657d40e2326f578c10022f58bc2344574c85caad1bfdf3fce65ac18742726b1ed0983a91898a2d30ee75af

C:\Windows\win.ini

MD5 8e6100faa270f8b935ebba91ae814491
SHA1 1b5d16ec7d3f2ed289fc4c079fed992275578257
SHA256 293b109535400cdd3eb36c8a47dcdda245e8f48200aa59bfddb21d105923e93b
SHA512 78b36ef3fd77d991d7ef9aa4f900f653edb1df5ab6ddbc369e0b3b3430fba9074673bf67d208cbb885b41afd3a9cd26ae9c2b392c70df7d08f055a41318469e7

memory/2468-26-0x0000000000400000-0x000000000045A000-memory.dmp

memory/2628-38-0x0000000000400000-0x000000000045A000-memory.dmp

memory/2628-37-0x0000000000400000-0x000000000045A000-memory.dmp

memory/2628-28-0x0000000000400000-0x000000000045A000-memory.dmp

memory/2628-36-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2628-32-0x0000000000400000-0x000000000045A000-memory.dmp

memory/2628-30-0x0000000000400000-0x000000000045A000-memory.dmp

memory/2628-44-0x0000000000400000-0x000000000045A000-memory.dmp

C:\Users\Admin\AppData\Roaming\Rem5\logs.dat

MD5 92f856c65b267b7d3aad33c26fb0d690
SHA1 eb1bb43829613f9013af46793784c67d4a8faad1
SHA256 9cbcaa5d0bf91bdb48c540d45cd5d3c257f3ec56de6f40b01c8ed5d19b73ddf9
SHA512 384bee97278cbd1f19717a1eb35b32c73b8ae34f4746c1782330c3328c5eea7d9cfb55051856c997cb55e7853e1050c8363c334d9dee127eaf2453775ddaac40

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-09 04:53

Reported

2024-05-09 04:58

Platform

win10v2004-20240226-en

Max time kernel

153s

Max time network

163s

Command Line

"C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe"

Signatures

Remcos

rat remcos

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe N/A
Key value queried \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\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\Rem5\Rem5.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\LKJhgtYGS = "\"C:\\Users\\Admin\\AppData\\Roaming\\Rem5\\Rem5.exe\"" C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\LKJhgtYGS = "\"C:\\Users\\Admin\\AppData\\Roaming\\Rem5\\Rem5.exe\"" C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4308 set thread context of 540 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\win.ini C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe N/A
File opened for modification C:\Windows\win.ini C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe N/A
File opened for modification C:\Windows\win.ini C:\Windows\SysWOW64\svchost.exe N/A

Enumerates physical storage devices

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000_Classes\Local Settings C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4452 wrote to memory of 3104 N/A C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 4452 wrote to memory of 3104 N/A C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 4452 wrote to memory of 3104 N/A C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe C:\Windows\SysWOW64\WScript.exe
PID 3104 wrote to memory of 4940 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 3104 wrote to memory of 4940 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 3104 wrote to memory of 4940 N/A C:\Windows\SysWOW64\WScript.exe C:\Windows\SysWOW64\cmd.exe
PID 4940 wrote to memory of 4308 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe
PID 4940 wrote to memory of 4308 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe
PID 4940 wrote to memory of 4308 N/A C:\Windows\SysWOW64\cmd.exe C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe
PID 4308 wrote to memory of 540 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 4308 wrote to memory of 540 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 4308 wrote to memory of 540 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 4308 wrote to memory of 540 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 4308 wrote to memory of 540 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 4308 wrote to memory of 540 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 4308 wrote to memory of 540 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe
PID 4308 wrote to memory of 540 N/A C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe C:\Windows\SysWOW64\svchost.exe

Processes

C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\28615260996f2ee3bf717734f6714014_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=4160 --field-trial-handle=3084,i,4016110471176367543,14287608422419064331,262144 --variations-seed-version /prefetch:8

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\Rem5\Rem5.exe"

C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe

C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe

C:\Windows\SysWOW64\svchost.exe

C:\Windows\SysWOW64\svchost.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 13.107.253.64:443 tcp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 24.121.18.2.in-addr.arpa udp
US 8.8.8.8:53 159.113.53.23.in-addr.arpa udp
US 8.8.8.8:53 178.223.142.52.in-addr.arpa udp
US 8.8.8.8:53 64.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 camglass.sytes.net udp
US 8.8.8.8:53 camvips.ddns.net udp
US 8.8.8.8:53 camvips.ddns.net udp
US 8.8.8.8:53 camvips.ddns.net udp
US 8.8.8.8:53 camvips.ddns.net udp
US 8.8.8.8:53 camvips.ddns.net udp
US 8.8.8.8:53 camvips.ddns.net udp
US 8.8.8.8:53 camvips.ddns.net udp
US 8.8.8.8:53 28.173.189.20.in-addr.arpa udp
US 8.8.8.8:53 camvips.ddns.net udp
US 8.8.8.8:53 camvips.ddns.net udp
US 8.8.8.8:53 camvips.ddns.net udp

Files

memory/4452-3-0x0000000000630000-0x0000000000730000-memory.dmp

memory/4452-5-0x0000000002BF0000-0x0000000002CF0000-memory.dmp

memory/4452-6-0x0000000077751000-0x0000000077871000-memory.dmp

memory/4452-7-0x0000000000400000-0x000000000045A000-memory.dmp

memory/4452-9-0x0000000000401000-0x0000000000402000-memory.dmp

memory/4452-13-0x0000000000630000-0x0000000000730000-memory.dmp

memory/4452-15-0x0000000002BF0000-0x0000000002CF0000-memory.dmp

memory/4452-16-0x0000000077751000-0x0000000077871000-memory.dmp

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

MD5 4b309959125fb954b68968bad5bed9ac
SHA1 b2b805fa81f1b82fa07b718031c9a89046731146
SHA256 109742373d7cca30b46ef4b05d9b86694e2a54f862afd891e7bba50cf0f18830
SHA512 9d90d6f5085ac7103aee6679272b677589afe3a50835152f3c1f799080e38b975f3c246d6649926a80a7ee3bbcabf755d6a20cf768083714a359bc9a5af9cf92

C:\Users\Admin\AppData\Roaming\Rem5\Rem5.exe

MD5 28615260996f2ee3bf717734f6714014
SHA1 4d974c30ad0b91bbb81a3f4684d4c8216b602608
SHA256 b312190adff333d7172e87d01dbb298ad7dbac987a6ad489fca561366161ee98
SHA512 af93cc53e0b2299c63247e44c9ad25d065f23a7409657d40e2326f578c10022f58bc2344574c85caad1bfdf3fce65ac18742726b1ed0983a91898a2d30ee75af

memory/4308-29-0x0000000000400000-0x000000000045A000-memory.dmp

C:\Windows\win.ini

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

memory/4308-32-0x0000000000400000-0x000000000045A000-memory.dmp

memory/4308-34-0x0000000000400000-0x000000000045A000-memory.dmp

memory/4308-36-0x0000000000400000-0x000000000045A000-memory.dmp

memory/4308-35-0x0000000000400000-0x000000000045A000-memory.dmp

memory/540-37-0x0000000000400000-0x000000000045A000-memory.dmp

memory/540-38-0x0000000000400000-0x000000000045A000-memory.dmp

C:\Windows\win.ini

MD5 fe0c4d84684551dc6429860c8e769578
SHA1 f181d3731695af4873cb9ccd41098b0bd7e7a98d
SHA256 e5aeb321c075f20134653784a42065464384b29690205bb2333446ade115f690
SHA512 74781dbc7d17392e43679b3f138885fa38bd040d9abbe676994df785877011d7dc75a9066f00c06d5020cdae461b76fa562888484fc53ef79414c54e035971c2

memory/540-44-0x0000000000400000-0x000000000045A000-memory.dmp

memory/4308-51-0x0000000000400000-0x000000000045A000-memory.dmp

memory/4308-52-0x0000000000400000-0x000000000045A000-memory.dmp

memory/4308-53-0x0000000000400000-0x000000000045A000-memory.dmp

C:\Users\Admin\AppData\Roaming\Rem5\logs.dat

MD5 e73f523f12c59e8f942d3bab6d2856f1
SHA1 3b6da83a2b6137714778ae13ee0d5cb68af1bdb1
SHA256 cf8af72752d55e70fbf56ab62915710fb0f1f3fdc75a163022cedf99cc9ecc59
SHA512 2154d2b502440da69a5688df3f7473371045caa3f1f0fc078a68ae7edeefab0fdd83c52a5f06f83dfb73f6e146fab9ffc37a1c1794623c24d6b319d19fdc0bc8