Malware Analysis Report

2024-12-07 22:24

Sample ID 240409-h59ydscf7s
Target wininit.exe
SHA256 0d1277800ce70608ae6223a3361f709c7c68743178ca51fe3a2409a610c76de5
Tags
remcos remotehost rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

0d1277800ce70608ae6223a3361f709c7c68743178ca51fe3a2409a610c76de5

Threat Level: Known bad

The file wininit.exe was found to be: Known bad.

Malicious Activity Summary

remcos remotehost rat

Remcos

Drops startup file

Executes dropped EXE

AutoIT Executable

Suspicious use of SetThreadContext

Unsigned PE

Suspicious behavior: GetForegroundWindowSpam

Suspicious behavior: MapViewOfSection

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Suspicious use of FindShellTrayWindow

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-04-09 07:20

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: behavioral2

Detonation Overview

Submitted

2024-04-09 07:20

Reported

2024-04-09 07:23

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

155s

Command Line

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

Signatures

Remcos

rat remcos

Drops startup file

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

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\directory\word.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 3316 set thread context of 3388 N/A C:\Users\Admin\AppData\Local\directory\word.exe C:\Windows\SysWOW64\svchost.exe

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\svchost.exe N/A

Suspicious behavior: MapViewOfSection

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

Processes

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

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

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

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

C:\Windows\SysWOW64\svchost.exe

"C:\Users\Admin\AppData\Local\Temp\wininit.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=1404 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 shgoini.com udp
US 107.175.229.143:30902 shgoini.com tcp
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 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 24.139.73.23.in-addr.arpa udp
US 107.175.229.143:30902 shgoini.com tcp
US 107.175.229.143:30902 shgoini.com tcp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
GB 142.250.187.234:443 chromewebstore.googleapis.com tcp
US 8.8.8.8:53 234.187.250.142.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 136.136.73.23.in-addr.arpa udp
US 8.8.8.8:53 59.189.79.40.in-addr.arpa udp

Files

memory/4808-10-0x0000000000BF0000-0x0000000000BF4000-memory.dmp

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

MD5 febfee4d1d6e1e9b755525d605f91598
SHA1 61dafd5a13cd5742b5ed3727f70a1a3b566a7fe0
SHA256 d14cb6f009e28fea983cd5af5c28869cee01762d60e6716004b7abcefdda8a21
SHA512 4a3f01346bd1ab0c2c8cd4c96e25ee7af424b3c0895ae5a99d6a2b94013c6cacc671736b413c621d1902dd307a9fe5198f501f07e71c373376a638d0c8d1a398

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

MD5 ceea497fc0601e397a9b0dba479b6ad3
SHA1 b791fd1115d9517d7e9cb9a987db2307aa900f67
SHA256 a17f87f849572c5977fa38198d6697a248424f2559aed98136834e188ac2d3f2
SHA512 702cff5d69b609e25d75545f58352aecf7ed28730c012f3a4ce6113842ebcda3308bc05e7658c27a260dec0bebaf25cad2bda1bff476aa79b2bb0ed4ad561858

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

MD5 1680954b249062aa27483ac80d9d2016
SHA1 acb196e38638fa7332a450b8ed9c127f1d56acff
SHA256 3614592179f15f4bc0cba05bac8e9dd7e545e6f623bd71b841aaa665f82b16cb
SHA512 9c94ec10f0577953a6bbc994b1339d9e414622efd07e4a61f31c5213f588d7327bd772c225a7a127736b721ec026ff836cf4167f9467dbf6df819bdec6e2ed93

memory/3388-28-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-29-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-30-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-31-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-32-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-33-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-34-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-35-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-36-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-38-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-39-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-40-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-41-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-42-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-43-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-44-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-45-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-46-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-47-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-48-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-49-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-50-0x0000000000400000-0x0000000000482000-memory.dmp

memory/3388-51-0x0000000000400000-0x0000000000482000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-09 07:20

Reported

2024-04-09 07:23

Platform

win7-20240221-en

Max time kernel

118s

Max time network

122s

Command Line

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

Signatures

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

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

Processes

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

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

Network

N/A

Files

memory/1152-10-0x0000000000130000-0x0000000000134000-memory.dmp