Malware Analysis Report

2025-01-02 03:16

Sample ID 240403-bgkv2abb41
Target 145f990406000a1e944fef609e608edd4f6a347d4038e880599bcc1fb6c709b7.gz
SHA256 145f990406000a1e944fef609e608edd4f6a347d4038e880599bcc1fb6c709b7
Tags
remcos remotehost rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

145f990406000a1e944fef609e608edd4f6a347d4038e880599bcc1fb6c709b7

Threat Level: Known bad

The file 145f990406000a1e944fef609e608edd4f6a347d4038e880599bcc1fb6c709b7.gz was found to be: Known bad.

Malicious Activity Summary

remcos remotehost rat

Remcos

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

Drops startup file

Executes dropped EXE

AutoIT Executable

Suspicious use of SetThreadContext

Unsigned PE

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Suspicious use of FindShellTrayWindow

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-04-03 01:06

Signatures

AutoIT Executable

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-03 01:06

Reported

2024-04-03 01:09

Platform

win7-20240221-en

Max time kernel

122s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Quotation.exe"

Signatures

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Quotation.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Quotation.exe

"C:\Users\Admin\AppData\Local\Temp\Quotation.exe"

Network

N/A

Files

memory/3044-10-0x0000000000160000-0x0000000000164000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-03 01:06

Reported

2024-04-03 01:10

Platform

win10v2004-20240226-en

Max time kernel

170s

Max time network

174s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Quotation.exe"

Signatures

Remcos

rat remcos

Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003)

Description Indicator Process Target
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Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\excel.vbs C:\Users\Admin\AppData\Local\directory\excel.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\directory\excel.exe N/A

AutoIT Executable

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3508 set thread context of 5112 N/A C:\Users\Admin\AppData\Local\directory\excel.exe C:\Windows\SysWOW64\svchost.exe

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\directory\excel.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Quotation.exe

"C:\Users\Admin\AppData\Local\Temp\Quotation.exe"

C:\Users\Admin\AppData\Local\directory\excel.exe

"C:\Users\Admin\AppData\Local\Temp\Quotation.exe"

C:\Windows\SysWOW64\svchost.exe

"C:\Users\Admin\AppData\Local\Temp\Quotation.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 78.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 shgoini.com udp
US 107.175.229.143:30902 shgoini.com tcp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 143.229.175.107.in-addr.arpa udp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp
US 8.8.8.8:53 50.33.237.178.in-addr.arpa udp
US 8.8.8.8:53 79.239.69.13.in-addr.arpa udp

Files

memory/3816-10-0x0000000001EA0000-0x0000000001EA4000-memory.dmp

C:\Users\Admin\AppData\Local\directory\excel.exe

MD5 e05ab31b28164715a79be10fa8f685e5
SHA1 ad0865fb787a0626fcb877fa836b4f5749e75616
SHA256 c2298aab018a2f99201b1591ea4155ffa1f308bb455bfad037d044ecbf885b5e
SHA512 0ce998830ebf8d04fc9ebadf33776ac5183fee73ee27aaecf924ca7bc3cfc81b698eed3945fb4b721668bbbee5e70fc2adbc9132f96c1bd39c5efcc6be716126

C:\Users\Admin\AppData\Local\Temp\intersentimental

MD5 33b3a37e1729538227a84e8aec307e27
SHA1 d888cf3906a4bc58ccc74cba9fe6f314d3be29dd
SHA256 61616629bc83442de66185fb8a8b3ed37d4fc690d473e28cf570527a5db7d456
SHA512 7d1f025b2c18f6b1e7d1793897a17bc36f95a417d1764efc109144b0ffbb8c0a43ea216cab1e3d16935565bcd309ac8845e9df1805f99a1ac8d1f687ad52ef80

C:\Users\Admin\AppData\Local\Temp\ambiparous

MD5 5836e6fb1198f5826ca8facdba529e79
SHA1 cc17afcef2c435265036b8520728963b91ae652c
SHA256 f59b9e90acdbe2a0cc3e5e66bb3214adb7506fc775b8264e36e408a21decfba0
SHA512 f66d5d9e96911ffe7228d2db7b305ee404ba59d25fcde778d00a590417e3606b72dac0a91b7edb4e5d42f7a5a14990eaf4b5058e16ca5e12b49701c6168e3045

memory/5112-28-0x0000000000400000-0x0000000000482000-memory.dmp

memory/5112-29-0x0000000000400000-0x0000000000482000-memory.dmp

memory/5112-30-0x0000000000400000-0x0000000000482000-memory.dmp

memory/5112-31-0x0000000000400000-0x0000000000482000-memory.dmp

memory/5112-32-0x0000000000400000-0x0000000000482000-memory.dmp

memory/5112-33-0x0000000000400000-0x0000000000482000-memory.dmp

memory/5112-34-0x0000000000400000-0x0000000000482000-memory.dmp

memory/5112-35-0x0000000000400000-0x0000000000482000-memory.dmp

memory/5112-36-0x0000000000400000-0x0000000000482000-memory.dmp

memory/5112-38-0x0000000000400000-0x0000000000482000-memory.dmp

memory/5112-39-0x0000000000400000-0x0000000000482000-memory.dmp

memory/5112-40-0x0000000000400000-0x0000000000482000-memory.dmp

memory/5112-41-0x0000000000400000-0x0000000000482000-memory.dmp

memory/5112-42-0x0000000000400000-0x0000000000482000-memory.dmp

memory/5112-43-0x0000000000400000-0x0000000000482000-memory.dmp