Malware Analysis Report

2024-09-22 10:17

Sample ID 240402-qcx25aah77
Target 03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7.zip
SHA256 70c8fedbf07a7df7a906550d60dfec0f49f47ee0d7033c06838fada96aa22996
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

70c8fedbf07a7df7a906550d60dfec0f49f47ee0d7033c06838fada96aa22996

Threat Level: Known bad

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

Malicious Activity Summary

persistence remote remcos rat

Remcos family

Remcos

Loads dropped DLL

Checks computer location settings

Executes dropped EXE

Adds Run key to start application

Unsigned PE

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious use of SetWindowsHookEx

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-04-02 13:07

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 13:07

Reported

2024-04-02 13:10

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

151s

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-1-5-21-566096764-1992588923-1249862864-1000\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\USER\S-1-5-21-566096764-1992588923-1249862864-1000\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-1-5-21-566096764-1992588923-1249862864-1000\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
US 8.8.8.8:53 202.110.86.104.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
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 52.142.223.178:80 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 35.34.16.2.in-addr.arpa udp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
NL 91.92.249.94:1998 leetboy.dynuddns.net tcp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
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
US 8.8.8.8:53 udp

Files

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

MD5 06f5b8dffc6c138828adbc7f29cfc7f0
SHA1 b59ef5d613a1e49c7034c3ee05780ce054ca0054
SHA256 03ba551339062106448ff58cbc393338483439513ec8439497bf47153e13f4b7
SHA512 e706a0b3b1981cac8ddcf81482b306b4538fbfbf5c332f2b484f8c503b66d73cd09ffaab0515ecb2063d1e4a27dc30a662cc0be4f5287d2982cfbb47c7dad893

C:\ProgramData\logsa\logs.dat

MD5 776dfb1b5a85d9360350cf19865b5d87
SHA1 f4de6565b347c24d173042e3b667ab881af1a52d
SHA256 73febeea03433c2315da0233cc118c316a72a2f43a790576bacac05437036731
SHA512 62c199247e3b59c3eb45476ad4b6eb8639943688b31d11cbe17e5488ac60c46e1d1e7229d9395c1045344311d93c7ead03e8fb4e1ce23029c57a11b7eba1c647

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-02 13:07

Reported

2024-04-02 13:10

Platform

win7-20240215-en

Max time kernel

147s

Max time network

145s

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-1-5-21-2248906074-2862704502-246302768-1000\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-1-5-21-2248906074-2862704502-246302768-1000\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
US 8.8.8.8:53 leetboy.dynuddns.net udp
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 537319e30bea34657d1f91a9868ebfca
SHA1 c8cd5037848e3f81620e78888373737730c0cf23
SHA256 295c60326a6208031c1615076be69a1c245ccd5096567e67e47c784cdd705c84
SHA512 4c9cdd1b098077cb2bf0609ef939f81998d5727c6339c3bc22b9347b4b9fb8fa66aad30c580c70ed44974ad48bbd14ca4fb4aa3f6bf147f5fc56da2bb1f21370