531a8c872653b255497c02c5c01aaba1bf2de0827c211047be23668f553e9ec7

Analysis

max time kernel
118s
max time network
120s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
29/12/2023, 22:51

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General

Target

0624ba2a7937467b3150f3fd37299632.dll
Size

236KB
MD5

0624ba2a7937467b3150f3fd37299632
SHA1

7a4edaa9a5b81bcfa4a76cb33c7726e6d7d15232
SHA256

531a8c872653b255497c02c5c01aaba1bf2de0827c211047be23668f553e9ec7
SHA512

bfaa19e86a57bfc27cdac47e46817c9d97c2fa5cb41c2fa695bb1bd7f2dfb87451a113d48cd55ef497144c692e7eb042d2a0ca68173017c045e6690b84f3f3cb
SSDEEP

1536:RKwWPQtr18y9582ElaHJrIjIAhRRhGXAR2XgiiAt5lmtYhWWS/GUGSDwk3z+:XBB5LJrKlHoARFAn2YhV8wkD+

Score

10^/10

persistence

Malware Config

Signatures

Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\llmckti = "{7f8a43a2-f702-4c57-0813-f702cb2af26a}"	rundll32.exe

Loads dropped DLL 1 IoCs

pid	Process
1236	rundll32.exe

Drops file in System32 directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\gghxfod.dll	rundll32.exe
File created	C:\Windows\SysWOW64\yyzpxgv.dll	rundll32.exe
File opened for modification	C:\Windows\SysWOW64\yyzpxgv.dll	rundll32.exe
File created	C:\Windows\SysWOW64\gghxfod.dll	rundll32.exe

Modifies registry class 5 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7f8a43a2-f702-4c57-0813-f702cb2af26a}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7f8a43a2-f702-4c57-0813-f702cb2af26a}\	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7f8a43a2-f702-4c57-0813-f702cb2af26a}\InprocServer32	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7f8a43a2-f702-4c57-0813-f702cb2af26a}\InprocServer32\ = "C:\\Windows\\SysWow64\\gghxfod.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7f8a43a2-f702-4c57-0813-f702cb2af26a}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1236	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1236	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1236	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2920 wrote to memory of 1236	2920	rundll32.exe	14
PID 2920 wrote to memory of 1236	2920	rundll32.exe	14
PID 2920 wrote to memory of 1236	2920	rundll32.exe	14
PID 2920 wrote to memory of 1236	2920	rundll32.exe	14
PID 2920 wrote to memory of 1236	2920	rundll32.exe	14
PID 2920 wrote to memory of 1236	2920	rundll32.exe	14
PID 2920 wrote to memory of 1236	2920	rundll32.exe	14

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0624ba2a7937467b3150f3fd37299632.dll,#1
1⤵
- Adds autorun key to be loaded by Explorer.exe on startup
- Loads dropped DLL
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1236

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\0624ba2a7937467b3150f3fd37299632.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2920

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1236-0-0x00000000001C0000-0x0000000000204000-memory.dmp

Filesize
272KB

Download
memory/1236-9-0x0000000075C20000-0x0000000075CC0000-memory.dmp

Filesize
640KB

Download
memory/1236-1-0x00000000001C0000-0x0000000000204000-memory.dmp

Filesize
272KB

Download
memory/1236-11-0x0000000075C20000-0x0000000075CC0000-memory.dmp

Filesize
640KB

Download
memory/1236-10-0x00000000001C0000-0x0000000000204000-memory.dmp

Filesize
272KB

Download