e6315b24e0311758da1c25daa5f2724da4f534ed7ed644cbf43f3cc64c4676a7

Analysis

max time kernel
359s
max time network
363s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
07/08/2024, 09:01

Sharing

Copy URL Twitter E-mail

Report Analysis Logs

General

Target
msimg32.dll
Size 4.9MB
Sample240807-kywhjayhqa
SHA256 1a2399ecc38f3288206c75b55762d125d3d75254062a2c0d85c86e7f896736ac
MD5 edfe2dd4d8218d13e1e6aa5501d5163b
SHA1 d3212ebb64dce90a8c972bf3a6f1ad734bc39b08
SHA512 282df1a436549af672dad5e74eb0617c882ec1665c6bad112850a7666cd93d2fa5f18f2935d0ebaa8562d592adcab380c6dc5a9117ec373fbf1310caef65035f
SSDEEP 49152:JErEyCal8VnN+LwbEOCAQFhZ81wm+R9BlwxPJfkwDQby1uZLOkALP7fivHdHufrF:JElCQ8VN+TAghZbR9y6wKyskkk2HOh
MD5 SHA1 SHA512 SSDEEP

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

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2958949473-3205530200-1453100116-1000\Software\Microsoft\Windows\CurrentVersion\Run\*ChromeUpdate = "rundll32.exe C:\\Users\\Admin\\Documents\\FirefoxData.dll,EntryPoint"	reg.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2588	rundll32.exe

Program crash 1 IoCs

pid	pid_target	Process	procid_target
2944	2556	WerFault.exe	31

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

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

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 2572 wrote to memory of 2588	2572	rundll32.exe	30
PID 2572 wrote to memory of 2588	2572	rundll32.exe	30
PID 2572 wrote to memory of 2588	2572	rundll32.exe	30
PID 2572 wrote to memory of 2588	2572	rundll32.exe	30
PID 2572 wrote to memory of 2588	2572	rundll32.exe	30
PID 2572 wrote to memory of 2588	2572	rundll32.exe	30
PID 2572 wrote to memory of 2588	2572	rundll32.exe	30
PID 2588 wrote to memory of 2556	2588	rundll32.exe	31
PID 2588 wrote to memory of 2556	2588	rundll32.exe	31
PID 2588 wrote to memory of 2556	2588	rundll32.exe	31
PID 2588 wrote to memory of 2556	2588	rundll32.exe	31
PID 2588 wrote to memory of 2556	2588	rundll32.exe	31
PID 2588 wrote to memory of 2556	2588	rundll32.exe	31
PID 2588 wrote to memory of 2556	2588	rundll32.exe	31
PID 2588 wrote to memory of 2556	2588	rundll32.exe	31
PID 2588 wrote to memory of 2556	2588	rundll32.exe	31
PID 2588 wrote to memory of 2556	2588	rundll32.exe	31
PID 2556 wrote to memory of 2944	2556	rundll32.exe	32
PID 2556 wrote to memory of 2944	2556	rundll32.exe	32
PID 2556 wrote to memory of 2944	2556	rundll32.exe	32
PID 2556 wrote to memory of 2944	2556	rundll32.exe	32
PID 2588 wrote to memory of 2920	2588	rundll32.exe	34
PID 2588 wrote to memory of 2920	2588	rundll32.exe	34
PID 2588 wrote to memory of 2920	2588	rundll32.exe	34
PID 2588 wrote to memory of 2920	2588	rundll32.exe	34
PID 2920 wrote to memory of 2892	2920	cmd.exe	36
PID 2920 wrote to memory of 2892	2920	cmd.exe	36
PID 2920 wrote to memory of 2892	2920	cmd.exe	36
PID 2920 wrote to memory of 2892	2920	cmd.exe	36

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\msimg32.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2572
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\msimg32.dll,#1
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2588
- - C:\Windows\SysWOW64\rundll32.exe
    "C:\Windows\SysWOW64\rundll32.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2556
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2556 -s 196
      4⤵
      Program crash
      PID:2944
- - C:\Windows\SysWOW64\cmd.exe
    cmd.exe /C reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*ChromeUpdate" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\FirefoxData.dll",EntryPoint /f & exit
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2920
  - - C:\Windows\SysWOW64\reg.exe
      reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run" /v "*ChromeUpdate" /t REG_SZ /d "rundll32.exe C:\Users\Admin\Documents\FirefoxData.dll",EntryPoint /f
      4⤵
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:2892

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/2556-4-0x00000000001D0000-0x000000000024E000-memory.dmp

Download

memory/2556-9-0x0000000000090000-0x0000000000091000-memory.dmp

Download

memory/2556-7-0x0000000000090000-0x0000000000091000-memory.dmp

Download

memory/2556-5-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Download

memory/2556-14-0x00000000001D0000-0x000000000024E000-memory.dmp

Download

memory/2556-16-0x00000000001D0000-0x000000000024E000-memory.dmp

Download

memory/2556-13-0x00000000001D0000-0x000000000024E000-memory.dmp

Download

memory/2588-1-0x0000000065013000-0x000000006502D000-memory.dmp

Download

memory/2588-2-0x0000000065000000-0x00000000654EA000-memory.dmp

Download

memory/2588-12-0x0000000065000000-0x00000000654EA000-memory.dmp

Download

memory/2588-3-0x0000000065000000-0x00000000654EA000-memory.dmp

Download

memory/2588-0-0x0000000065000000-0x00000000654EA000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads