Malware Analysis Report

2024-09-22 10:16

Sample ID 240402-lz5m9sea57
Target 03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7.zip
SHA256 e5f662cfb991bb883da1cd920b511f4f2d7556c9b1a4e072b74c19457940547e
Tags
persistence remote remcos rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

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

e5f662cfb991bb883da1cd920b511f4f2d7556c9b1a4e072b74c19457940547e

Threat Level: Known bad

The file 03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7.zip was found to be: Known bad.

Malicious Activity Summary

persistence remote remcos rat

Remcos family

Remcos

Checks computer location settings

Executes dropped EXE

Loads dropped DLL

Adds Run key to start application

Unsigned PE

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-04-02 09:59

Signatures

Remcos family

remcos

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-02 09:59

Reported

2024-04-02 10:01

Platform

win10v2004-20240319-en

Max time kernel

150s

Max time network

157s

Command Line

"C:\Users\Admin\AppData\Local\Temp\03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7.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\03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7.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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-3XK1S0 = "\"C:\\Users\\Admin\\AppData\\Roaming\\microsofts\\svcs.exe\"" C:\Users\Admin\AppData\Local\Temp\03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7.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\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\03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7.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\03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7.exe

"C:\Users\Admin\AppData\Local\Temp\03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7.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=4032 --field-trial-handle=2288,i,11069632825633797559,14829202121434726371,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 20.231.121.79:80 tcp
US 8.8.8.8:53 82.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 leetboy.dynuddns.net udp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 218.110.86.104.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 14.34.115.104.in-addr.arpa udp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 24.66.18.2.in-addr.arpa udp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
GB 13.105.221.16:443 tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 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
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 leetboy.dynuddns.net udp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 85.65.42.20.in-addr.arpa udp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp

Files

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

MD5 06f5b8dffc6c138828adbc7f29cfc7f0
SHA1 b59ef5d613a1e49c7034c3ee05780ce054ca0054
SHA256 03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7
SHA512 e706a0b3b1981cac8ddcf81482b306b4538fbfbf5c332f2b484f8c503b66d73cd09ffaab0515ecb2063d1e4a27dc30a662cc0be4f5287d2982cfbb47c7dad893

C:\ProgramData\logsa\logs.dat

MD5 4177d7ca73c95a897528903be3604f7c
SHA1 73fb16ae3bfd2ff6c476a2a8373da02b4503d573
SHA256 4c78917db04d4a74fec5f441ce4fd9e2f665e7f1a032a294d81e9773f21920b2
SHA512 2d7fd8cfdac0229cc715f7acb0965facafc54271cc9f92e5ae391bd6b780312e6fe77c464100a289032eae7f99b54a8f0b437b49d446b6639563d63c2c815bc4

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-02 09:59

Reported

2024-04-02 10:02

Platform

win7-20240221-en

Max time kernel

160s

Max time network

172s

Command Line

"C:\Users\Admin\AppData\Local\Temp\03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7.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\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-1-5-21-2461186416-2307104501-1787948496-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-3XK1S0 = "\"C:\\Users\\Admin\\AppData\\Roaming\\microsofts\\svcs.exe\"" C:\Users\Admin\AppData\Local\Temp\03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7.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\03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7.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\03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7.exe

"C:\Users\Admin\AppData\Local\Temp\03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7.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
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 leetboy.dynuddns.net udp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 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 e8c4a45ea4ea6a656b1b3dd3d8c6e6a6
SHA1 8b1af7b54ecbc2d2257f942aa40e5fbebf003c9f
SHA256 3be63e5d1996a4edb9532147600ff4085189b902fa108f5bbce3821e96652cbe
SHA512 65f42369ffa6f7cb0d0b7eb1300df83847ae881c6f5a25a67ce46573c73d19110843473ed536cc4d8478bb2d6f878a709499d662b39f4bffae42bdfe6f38cba3