Malware Analysis Report

2024-11-30 21:37

Sample ID 231231-pqzmfahagn
Target 3644686431d56a0d0ea6ba5a3192f266
SHA256 5605ec07c6ea613c100f2ffc1826c312358df6dff2362b5c7877fc99f5ba901d
Tags
dridex botnet evasion payload persistence trojan
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

5605ec07c6ea613c100f2ffc1826c312358df6dff2362b5c7877fc99f5ba901d

Threat Level: Known bad

The file 3644686431d56a0d0ea6ba5a3192f266 was found to be: Known bad.

Malicious Activity Summary

dridex botnet evasion payload persistence trojan

Dridex

Dridex Shellcode

Loads dropped DLL

Executes dropped EXE

Checks whether UAC is enabled

Adds Run key to start application

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Uses Task Scheduler COM API

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-31 12:32

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-31 12:32

Reported

2024-01-04 14:50

Platform

win7-20231215-en

Max time kernel

6s

Max time network

118s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\3644686431d56a0d0ea6ba5a3192f266.dll,#1

Signatures

Dridex

botnet dridex

Dridex Shellcode

botnet payload
Description Indicator Process Target
N/A N/A N/A N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\68pEF\osk.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\JJut\Dxpserver.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A C:\Users\Admin\AppData\Local\68pEF\osk.exe N/A
N/A N/A N/A N/A
N/A N/A C:\Users\Admin\AppData\Local\JJut\Dxpserver.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-3601492379-692465709-652514833-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rtxtioiynm = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Cookies\\BseC\\Dxpserver.exe" N/A N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\JJut\Dxpserver.exe N/A
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Windows\system32\rundll32.exe N/A
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\68pEF\osk.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A C:\Windows\system32\rundll32.exe N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1188 wrote to memory of 2672 N/A N/A C:\Windows\system32\osk.exe
PID 1188 wrote to memory of 2672 N/A N/A C:\Windows\system32\osk.exe
PID 1188 wrote to memory of 2672 N/A N/A C:\Windows\system32\osk.exe
PID 1188 wrote to memory of 2984 N/A N/A C:\Users\Admin\AppData\Local\68pEF\osk.exe
PID 1188 wrote to memory of 2984 N/A N/A C:\Users\Admin\AppData\Local\68pEF\osk.exe
PID 1188 wrote to memory of 2984 N/A N/A C:\Users\Admin\AppData\Local\68pEF\osk.exe
PID 1188 wrote to memory of 2608 N/A N/A C:\Windows\system32\Dxpserver.exe
PID 1188 wrote to memory of 2608 N/A N/A C:\Windows\system32\Dxpserver.exe
PID 1188 wrote to memory of 2608 N/A N/A C:\Windows\system32\Dxpserver.exe
PID 1188 wrote to memory of 2640 N/A N/A C:\Users\Admin\AppData\Local\JJut\Dxpserver.exe
PID 1188 wrote to memory of 2640 N/A N/A C:\Users\Admin\AppData\Local\JJut\Dxpserver.exe
PID 1188 wrote to memory of 2640 N/A N/A C:\Users\Admin\AppData\Local\JJut\Dxpserver.exe
PID 1188 wrote to memory of 764 N/A N/A C:\Windows\system32\eudcedit.exe
PID 1188 wrote to memory of 764 N/A N/A C:\Windows\system32\eudcedit.exe
PID 1188 wrote to memory of 764 N/A N/A C:\Windows\system32\eudcedit.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\3644686431d56a0d0ea6ba5a3192f266.dll,#1

C:\Users\Admin\AppData\Local\68pEF\osk.exe

C:\Users\Admin\AppData\Local\68pEF\osk.exe

C:\Windows\system32\osk.exe

C:\Windows\system32\osk.exe

C:\Users\Admin\AppData\Local\JJut\Dxpserver.exe

C:\Users\Admin\AppData\Local\JJut\Dxpserver.exe

C:\Windows\system32\Dxpserver.exe

C:\Windows\system32\Dxpserver.exe

C:\Windows\system32\eudcedit.exe

C:\Windows\system32\eudcedit.exe

C:\Users\Admin\AppData\Local\c24QZCGxt\eudcedit.exe

C:\Users\Admin\AppData\Local\c24QZCGxt\eudcedit.exe

Network

N/A

Files

memory/1936-1-0x0000000000290000-0x0000000000297000-memory.dmp

memory/1936-0-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-4-0x0000000077206000-0x0000000077207000-memory.dmp

memory/1936-8-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-13-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-18-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-34-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-38-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-45-0x0000000002500000-0x0000000002507000-memory.dmp

memory/1188-48-0x0000000077570000-0x0000000077572000-memory.dmp

memory/1188-57-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-47-0x0000000077411000-0x0000000077412000-memory.dmp

memory/1188-63-0x0000000140000000-0x0000000140241000-memory.dmp

memory/2984-75-0x0000000140000000-0x0000000140242000-memory.dmp

memory/2984-80-0x0000000140000000-0x0000000140242000-memory.dmp

memory/2984-77-0x00000000002D0000-0x00000000002D7000-memory.dmp

memory/1188-66-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-46-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-37-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-36-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-35-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-33-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-32-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-31-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-30-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-29-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-28-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-27-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-26-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-25-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-24-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-23-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-22-0x0000000140000000-0x0000000140241000-memory.dmp

memory/2640-104-0x0000000140000000-0x0000000140242000-memory.dmp

memory/2640-101-0x0000000000380000-0x0000000000387000-memory.dmp

memory/1188-21-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-20-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-19-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-17-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-16-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-15-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-14-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-12-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-11-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-10-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-9-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-7-0x0000000140000000-0x0000000140241000-memory.dmp

memory/1188-5-0x0000000002520000-0x0000000002521000-memory.dmp

memory/548-124-0x0000000140000000-0x0000000140248000-memory.dmp

memory/548-123-0x0000000000100000-0x0000000000107000-memory.dmp

memory/1188-154-0x0000000077206000-0x0000000077207000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-31 12:32

Reported

2024-01-04 15:02

Platform

win10v2004-20231215-en

Max time kernel

33s

Max time network

57s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\3644686431d56a0d0ea6ba5a3192f266.dll,#1

Signatures

N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\3644686431d56a0d0ea6ba5a3192f266.dll,#1

Network

Country Destination Domain Proto
US 138.91.171.81:80 tcp

Files

N/A