Malware Analysis Report

2024-09-22 10:41

Sample ID 240329-eshftsaa79
Target 06f5b8dffc6c138828adbc7f29cfc7f0.exe
SHA256 03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7
Tags
remote remcos persistence rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7

Threat Level: Known bad

The file 06f5b8dffc6c138828adbc7f29cfc7f0.exe was found to be: Known bad.

Malicious Activity Summary

remote remcos persistence rat

Remcos

Remcos family

Executes dropped EXE

Loads dropped DLL

Checks computer location settings

Adds Run key to start application

Enumerates physical storage devices

Unsigned PE

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-03-29 04:12

Signatures

Remcos family

remcos

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-29 04:12

Reported

2024-03-29 04:14

Platform

win7-20240221-en

Max time kernel

150s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\06f5b8dffc6c138828adbc7f29cfc7f0.exe"

Signatures

Remcos

rat remcos

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-3XK1S0 = "\"C:\\Users\\Admin\\AppData\\Roaming\\microsofts\\svcs.exe\"" C:\Users\Admin\AppData\Local\Temp\06f5b8dffc6c138828adbc7f29cfc7f0.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-3XK1S0 = "\"C:\\Users\\Admin\\AppData\\Roaming\\microsofts\\svcs.exe\"" C:\Users\Admin\AppData\Local\Temp\06f5b8dffc6c138828adbc7f29cfc7f0.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-3XK1S0 = "\"C:\\Users\\Admin\\AppData\\Roaming\\microsofts\\svcs.exe\"" C:\Users\Admin\AppData\Roaming\microsofts\svcs.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-3XK1S0 = "\"C:\\Users\\Admin\\AppData\\Roaming\\microsofts\\svcs.exe\"" C:\Users\Admin\AppData\Roaming\microsofts\svcs.exe N/A

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

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

Processes

C:\Users\Admin\AppData\Local\Temp\06f5b8dffc6c138828adbc7f29cfc7f0.exe

"C:\Users\Admin\AppData\Local\Temp\06f5b8dffc6c138828adbc7f29cfc7f0.exe"

C:\Users\Admin\AppData\Roaming\microsofts\svcs.exe

"C:\Users\Admin\AppData\Roaming\microsofts\svcs.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 leetboy.dynuddns.net udp
IT 185.196.11.223:1998 leetboy.dynuddns.net tcp
IT 185.196.11.223:1998 leetboy.dynuddns.net tcp
IT 185.196.11.223:1998 leetboy.dynuddns.net tcp
IT 185.196.11.223:1998 leetboy.dynuddns.net tcp
IT 185.196.11.223:1998 leetboy.dynuddns.net tcp
IT 185.196.11.223:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 leetboy.dynuddns.net udp
IT 185.196.11.223:1998 leetboy.dynuddns.net tcp

Files

\Users\Admin\AppData\Roaming\microsofts\svcs.exe

MD5 06f5b8dffc6c138828adbc7f29cfc7f0
SHA1 b59ef5d613a1e49c7034c3ee05780ce054ca0054
SHA256 03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7
SHA512 e706a0b3b1981cac8ddcf81482b306b4538fbfbf5c332f2b484f8c503b66d73cd09ffaab0515ecb2063d1e4a27dc30a662cc0be4f5287d2982cfbb47c7dad893

C:\ProgramData\logsa\logs.dat

MD5 994db17fbdb1a7e13a4afa212f7f995d
SHA1 5a4345c79ee88edd4f2162115593514c8dc1dc36
SHA256 5dbb739f62f43861ef51c7b7c84857689f69d0f5bc10f3fea2e1c5bed5fd0d13
SHA512 7d3867be148fb95b059f0a3b01ed3bbfafeb88671516e361e3718692f895a2743f879cbf6c0696375e559072438f14d309865febcc58c3802cde3ccfc7c48ab1

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-29 04:12

Reported

2024-03-29 04:14

Platform

win10v2004-20240319-en

Max time kernel

149s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\06f5b8dffc6c138828adbc7f29cfc7f0.exe"

Signatures

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-817259280-2658881748-983986378-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\06f5b8dffc6c138828adbc7f29cfc7f0.exe N/A

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-817259280-2658881748-983986378-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-3XK1S0 = "\"C:\\Users\\Admin\\AppData\\Roaming\\microsofts\\svcs.exe\"" C:\Users\Admin\AppData\Roaming\microsofts\svcs.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-3XK1S0 = "\"C:\\Users\\Admin\\AppData\\Roaming\\microsofts\\svcs.exe\"" C:\Users\Admin\AppData\Roaming\microsofts\svcs.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-817259280-2658881748-983986378-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-3XK1S0 = "\"C:\\Users\\Admin\\AppData\\Roaming\\microsofts\\svcs.exe\"" C:\Users\Admin\AppData\Local\Temp\06f5b8dffc6c138828adbc7f29cfc7f0.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-3XK1S0 = "\"C:\\Users\\Admin\\AppData\\Roaming\\microsofts\\svcs.exe\"" C:\Users\Admin\AppData\Local\Temp\06f5b8dffc6c138828adbc7f29cfc7f0.exe N/A

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

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

Processes

C:\Users\Admin\AppData\Local\Temp\06f5b8dffc6c138828adbc7f29cfc7f0.exe

"C:\Users\Admin\AppData\Local\Temp\06f5b8dffc6c138828adbc7f29cfc7f0.exe"

C:\Users\Admin\AppData\Roaming\microsofts\svcs.exe

"C:\Users\Admin\AppData\Roaming\microsofts\svcs.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=4044 --field-trial-handle=2844,i,5640589924128028832,7963280732661142908,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 41.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 leetboy.dynuddns.net udp
IT 185.196.11.223:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 14.34.115.104.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
IT 185.196.11.223:1998 leetboy.dynuddns.net 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 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 13.107.246.64:443 tcp
IT 185.196.11.223:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
IT 185.196.11.223:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
IT 185.196.11.223:1998 leetboy.dynuddns.net tcp
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 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
IT 185.196.11.223:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 leetboy.dynuddns.net udp
IT 185.196.11.223:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 26.178.89.13.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Roaming\microsofts\svcs.exe

MD5 06f5b8dffc6c138828adbc7f29cfc7f0
SHA1 b59ef5d613a1e49c7034c3ee05780ce054ca0054
SHA256 03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7
SHA512 e706a0b3b1981cac8ddcf81482b306b4538fbfbf5c332f2b484f8c503b66d73cd09ffaab0515ecb2063d1e4a27dc30a662cc0be4f5287d2982cfbb47c7dad893

C:\ProgramData\logsa\logs.dat

MD5 3c19973b0c8e340e84ca500af762a171
SHA1 8049e508da62ab1fc00418498db641b35198dacf
SHA256 1dadffcd1e12e14297d46b9c0c28460f270aa370f40882813f2268ebe74a74f3
SHA512 09ce99e693bcfbedccf9036300f5f7c11631f0b69bdb5c185736705815e88f394d4c933feee536b0c400d99bcd49356688d932cf355a9c017425b44659b93439