Malware Analysis Report

2024-12-07 22:33

Sample ID 240411-qaw22sca44
Target 11042024_2103_11042024_099920918271827.zip
SHA256 1f596e6501e1d95c29f80c9bbb4303746be62877626b558044b1f1421c1abf25
Tags
modiloader trojan remcos remotehost persistence rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

1f596e6501e1d95c29f80c9bbb4303746be62877626b558044b1f1421c1abf25

Threat Level: Known bad

The file 11042024_2103_11042024_099920918271827.zip was found to be: Known bad.

Malicious Activity Summary

modiloader trojan remcos remotehost persistence rat

Remcos

ModiLoader, DBatLoader

ModiLoader Second Stage

Executes dropped EXE

Adds Run key to start application

Drops file in System32 directory

Program crash

Unsigned PE

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Modifies registry class

Suspicious use of WriteProcessMemory

Script User-Agent

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-11 13:04

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-11 13:04

Reported

2024-04-11 13:06

Platform

win7-20240221-en

Max time kernel

130s

Max time network

133s

Command Line

"C:\Users\Admin\AppData\Local\Temp\099920918271827.exe"

Signatures

ModiLoader, DBatLoader

trojan modiloader

ModiLoader Second Stage

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

Processes

C:\Users\Admin\AppData\Local\Temp\099920918271827.exe

"C:\Users\Admin\AppData\Local\Temp\099920918271827.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1612 -s 720

Network

Country Destination Domain Proto
US 8.8.8.8:53 onedrive.live.com udp
US 13.107.137.11:443 onedrive.live.com tcp
US 13.107.137.11:443 onedrive.live.com tcp

Files

memory/1612-0-0x0000000000220000-0x0000000000221000-memory.dmp

memory/1612-1-0x0000000002DD0000-0x0000000003DD0000-memory.dmp

memory/1612-2-0x0000000002DD0000-0x0000000003DD0000-memory.dmp

memory/1612-4-0x0000000000220000-0x0000000000221000-memory.dmp

memory/1612-5-0x0000000000400000-0x00000000004F3000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-11 13:04

Reported

2024-04-11 13:06

Platform

win10v2004-20240226-en

Max time kernel

92s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\099920918271827.exe"

Signatures

ModiLoader, DBatLoader

trojan modiloader

Remcos

rat remcos

ModiLoader Second Stage

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

Executes dropped EXE

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

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Otmdfowz = "C:\\Users\\Public\\Otmdfowz.url" C:\Users\Admin\AppData\Local\Temp\099920918271827.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-H3YHZ8 = "\"C:\\Windows\\SysWOW64\\skype\\sjype.exe\"" C:\Windows\SysWOW64\SndVol.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-H3YHZ8 = "\"C:\\Windows\\SysWOW64\\skype\\sjype.exe\"" C:\Windows\SysWOW64\SndVol.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\skype\sjype.exe C:\Windows\SysWOW64\SndVol.exe N/A
File opened for modification C:\Windows\SysWOW64\skype C:\Windows\SysWOW64\SndVol.exe N/A
File created C:\Windows\SysWOW64\skype\sjype.exe C:\Windows\SysWOW64\SndVol.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\ C:\Windows\SysWOW64\SndVol.exe N/A

Script User-Agent

Description Indicator Process Target
HTTP User-Agent header Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5) N/A N/A
HTTP User-Agent header Mozilla/4.0 (compatible; Win32; WinHttp.WinHttpRequest.5) N/A N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\099920918271827.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\099920918271827.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of SendNotifyMessage

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

Processes

C:\Users\Admin\AppData\Local\Temp\099920918271827.exe

"C:\Users\Admin\AppData\Local\Temp\099920918271827.exe"

C:\Windows\SysWOW64\extrac32.exe

C:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\099920918271827.exe C:\\Users\\Public\\Libraries\\Otmdfowz.PIF

C:\Windows\SysWOW64\SndVol.exe

C:\Windows\System32\SndVol.exe

C:\Windows\SysWOW64\skype\sjype.exe

"C:\Windows\SysWOW64\skype\sjype.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 onedrive.live.com udp
US 13.107.137.11:443 onedrive.live.com tcp
US 13.107.137.11:443 onedrive.live.com tcp
US 8.8.8.8:53 a4yt7w.bn.files.1drv.com udp
US 13.107.42.12:443 a4yt7w.bn.files.1drv.com tcp
US 13.107.137.11:443 onedrive.live.com tcp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 12.42.107.13.in-addr.arpa udp
US 8.8.8.8:53 11.137.107.13.in-addr.arpa udp
US 13.107.137.11:443 onedrive.live.com tcp
US 8.8.8.8:53 26.165.165.52.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 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp

Files

memory/2400-0-0x00000000009D0000-0x00000000009D1000-memory.dmp

memory/2400-1-0x00000000028C0000-0x00000000038C0000-memory.dmp

memory/2400-2-0x00000000028C0000-0x00000000038C0000-memory.dmp

memory/2400-4-0x0000000000400000-0x00000000004F3000-memory.dmp

memory/5048-10-0x0000000002F20000-0x0000000003F20000-memory.dmp

memory/5048-11-0x0000000000400000-0x0000000000482000-memory.dmp

C:\Windows\SysWOW64\skype\sjype.exe

MD5 5ac83d3d18f9b6e1c5b78bd712661524
SHA1 9ee22c8038e47a4935aeac113d3f2ee6f03a22c4
SHA256 d68ddc4be84705357288ba972939aa9aa5f95537ebc059c3ff3ccaae11638fca
SHA512 2fc37b27836a4f0a4c61a5cd976e7452120585b86a615cce25108737337a9a02b73cc68c92b26fbb89a5cadbf3033ad0b6355cc5b7094f18318e3dbea1b84082

memory/5048-72-0x0000000002F20000-0x0000000003F20000-memory.dmp

memory/5048-73-0x0000000000400000-0x0000000000482000-memory.dmp