66ffa9d4e27a9f787eaa47364d57b95feae92af35ab154299c5134eacc9f4c42

Analysis

max time kernel
32s
max time network
16s
platform
windows7_x64
resource
win7-20240704-en
resource tags

arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
submitted
14-08-2024 19:17

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

223a3aa520689c0021d8ce51024d5bb0N.dll
Size

3.7MB
MD5

223a3aa520689c0021d8ce51024d5bb0
SHA1

1fbcb94006ea1b3dd1796cebe0e78fb0b9b6a874
SHA256

66ffa9d4e27a9f787eaa47364d57b95feae92af35ab154299c5134eacc9f4c42
SHA512

b329830a0b22310e4262bd071edfaf38afa199bb428dc1f99b31c83df0f699eb842e6a466d803670d5066780217e7eb966e505262c3620eeb922629ee6883fe3
SSDEEP

98304:ziXAEqfpQA7KhbchheGvUapVXNe1gNuqh+CaO:eQxRQA7K9QPfZNe1rqh+

Score

6^/10

discovery persistence

Malware Config

Signatures

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

reg.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3450744190-3404161390-554719085-1000\Software\Microsoft\Windows\CurrentVersion\Run\CrowdstrikeEngine = "rundll32.exe C:\\Users\\Admin\\Documents\\WDEngineUpdater.dll,EntryPoint"	reg.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid	pid_target	Process
2336	2340	WerFault.exe

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

rundll32.exerundll32.execmd.exereg.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

rundll32.exerundll32.exerundll32.execmd.exe

description	pid	Process	procid_target
PID 2380 wrote to memory of 2972	2380	rundll32.exe	30
PID 2380 wrote to memory of 2972	2380	rundll32.exe	30
PID 2380 wrote to memory of 2972	2380	rundll32.exe	30
PID 2380 wrote to memory of 2972	2380	rundll32.exe	30
PID 2380 wrote to memory of 2972	2380	rundll32.exe	30
PID 2380 wrote to memory of 2972	2380	rundll32.exe	30
PID 2380 wrote to memory of 2972	2380	rundll32.exe	30
PID 2972 wrote to memory of 2340	2972	rundll32.exe	32
PID 2972 wrote to memory of 2340	2972	rundll32.exe	32
PID 2972 wrote to memory of 2340	2972	rundll32.exe	32
PID 2972 wrote to memory of 2340	2972	rundll32.exe	32
PID 2972 wrote to memory of 2340	2972	rundll32.exe	32
PID 2972 wrote to memory of 2340	2972	rundll32.exe	32
PID 2972 wrote to memory of 2340	2972	rundll32.exe	32
PID 2972 wrote to memory of 2340	2972	rundll32.exe	32
PID 2972 wrote to memory of 2340	2972	rundll32.exe	32
PID 2340 wrote to memory of 2336	2340	rundll32.exe	33
PID 2340 wrote to memory of 2336	2340	rundll32.exe	33
PID 2340 wrote to memory of 2336	2340	rundll32.exe	33
PID 2340 wrote to memory of 2336	2340	rundll32.exe	33
PID 2972 wrote to memory of 316	2972	rundll32.exe	34
PID 2972 wrote to memory of 316	2972	rundll32.exe	34
PID 2972 wrote to memory of 316	2972	rundll32.exe	34
PID 2972 wrote to memory of 316	2972	rundll32.exe	34
PID 316 wrote to memory of 2740	316	cmd.exe	36
PID 316 wrote to memory of 2740	316	cmd.exe	36
PID 316 wrote to memory of 2740	316	cmd.exe	36
PID 316 wrote to memory of 2740	316	cmd.exe	36

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\223a3aa520689c0021d8ce51024d5bb0N.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2380
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\223a3aa520689c0021d8ce51024d5bb0N.dll,#1
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2972
- - C:\Windows\SysWOW64\rundll32.exe
    "C:\Windows\SysWOW64\rundll32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2340
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2340 -s 196
      4⤵
      Program crash
      PID:2336
- - C:\Windows\SysWOW64\cmd.exe
    cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "CrowdstrikeEngine" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\WDEngineUpdater.dll",EntryPoint /f & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:316
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "CrowdstrikeEngine" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\WDEngineUpdater.dll",EntryPoint /f
      4⤵
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:2740

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2340-12-0x0000000000110000-0x000000000018E000-memory.dmp

Filesize
504KB

Download
memory/2340-2-0x0000000000110000-0x000000000018E000-memory.dmp

Filesize
504KB

Download
memory/2340-4-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2340-6-0x0000000000110000-0x000000000018E000-memory.dmp

Filesize
504KB

Download
memory/2340-10-0x0000000000110000-0x000000000018E000-memory.dmp

Filesize
504KB

Download
memory/2972-19-0x0000000046108000-0x0000000046133000-memory.dmp

Filesize
172KB

Download
memory/2972-17-0x00000000460D6000-0x0000000046106000-memory.dmp

Filesize
192KB

Download
memory/2972-18-0x00000000460DA000-0x0000000046106000-memory.dmp

Filesize
176KB

Download
memory/2972-16-0x0000000046105000-0x0000000046133000-memory.dmp

Filesize
184KB

Download
memory/2972-0-0x0000000045DB0000-0x0000000046163000-memory.dmp

Filesize
3.7MB

Download
memory/2972-1-0x0000000045DE0000-0x0000000045DFA000-memory.dmp

Filesize
104KB

Download
memory/2972-8-0x0000000045DB0000-0x0000000046163000-memory.dmp

Filesize
3.7MB

Download
memory/2972-13-0x0000000045DB0000-0x0000000046163000-memory.dmp

Filesize
3.7MB

Download
memory/2972-20-0x0000000045DB0000-0x0000000046163000-memory.dmp

Filesize
3.7MB

Download