8f988aeb16b184e584ec993fd1d8a7d9cb20c773ebb1d9159775ee8d60668de6

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
31/12/2023, 13:08

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General

Target

3751c1c1ddcd84451a3ced3fc9a2863d.dll
Size

24KB
MD5

3751c1c1ddcd84451a3ced3fc9a2863d
SHA1

d58a9437545bce947a5d851cef2e5f2971106536
SHA256

8f988aeb16b184e584ec993fd1d8a7d9cb20c773ebb1d9159775ee8d60668de6
SHA512

623b53eff7203a8e1bee5b778968394a33d5d4a3aa73583dc91782b622a3c19fc1d5d8197b5384ed17d9555a421da3ad1295e01674ada51aa27a28d97ce7e4f4
SSDEEP

384:oYeMjyec2GdaoaAWVY7pvBvBvuUEe8T9PgoRsCVVSJ/inoocj0zwstn6:MMhc2yaoLavdeEPgoRpjhnUW0

Score

7^/10

persistence

Malware Config

Signatures

Loads dropped DLL 3 IoCs

pid	Process
2168	rundll32.exe
2168	rundll32.exe
4844	rundll32.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\iifcARIx.dll,#1"	rundll32.exe

Drops file in System32 directory 2 IoCs

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

Modifies registry class 4 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A39F3CC6-5D6E-4A86-9295-6BD60D5C3471}\InprocServer32\ = "C:\\Windows\\SysWow64\\iifcARIx.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A39F3CC6-5D6E-4A86-9295-6BD60D5C3471}\InprocServer32\ThreadingModel = "Both"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A39F3CC6-5D6E-4A86-9295-6BD60D5C3471}	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A39F3CC6-5D6E-4A86-9295-6BD60D5C3471}\InprocServer32	rundll32.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2168	rundll32.exe
2168	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe
4844	rundll32.exe

Suspicious behavior: RenamesItself 1 IoCs

pid	Process
2168	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2168	rundll32.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2168	rundll32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 220 wrote to memory of 2168	220	rundll32.exe	40
PID 220 wrote to memory of 2168	220	rundll32.exe	40
PID 220 wrote to memory of 2168	220	rundll32.exe	40
PID 2168 wrote to memory of 612	2168	rundll32.exe	5
PID 2168 wrote to memory of 4844	2168	rundll32.exe	102
PID 2168 wrote to memory of 4844	2168	rundll32.exe	102
PID 2168 wrote to memory of 4844	2168	rundll32.exe	102

C:\Windows\system32\winlogon.exe
winlogon.exe
1⤵
PID:612

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\3751c1c1ddcd84451a3ced3fc9a2863d.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:220
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\3751c1c1ddcd84451a3ced3fc9a2863d.dll,#1
  2⤵
  - Loads dropped DLL
  - Drops file in System32 directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: RenamesItself
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2168
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Windows\system32\iifcARIx.dll,a
    3⤵
    - Loads dropped DLL
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious behavior: EnumeratesProcesses
    PID:4844

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

C:\Windows\SysWOW64\iifcARIx.dll

Filesize
24KB

MD5
3751c1c1ddcd84451a3ced3fc9a2863d

SHA1
d58a9437545bce947a5d851cef2e5f2971106536

SHA256
8f988aeb16b184e584ec993fd1d8a7d9cb20c773ebb1d9159775ee8d60668de6

SHA512
623b53eff7203a8e1bee5b778968394a33d5d4a3aa73583dc91782b622a3c19fc1d5d8197b5384ed17d9555a421da3ad1295e01674ada51aa27a28d97ce7e4f4

Download Submit
memory/2168-0-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/2168-1-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/2168-8-0x00000000028C0000-0x00000000028D2000-memory.dmp

Filesize
72KB

Download
memory/2168-9-0x00000000028C0000-0x00000000028D2000-memory.dmp

Filesize
72KB

Download
memory/2168-10-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/4844-16-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download
memory/4844-17-0x0000000010000000-0x0000000010012000-memory.dmp

Filesize
72KB

Download