c181ec70bfb70b605977f435fffd1933be9f36de72b8a6a0531ab2c6f322e614

Analysis

max time kernel
139s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
19/09/2022, 07:09

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General

Target

c181ec70bfb70b605977f435fffd1933be9f36de72b8a6a0531ab2c6f322e614.exe
Size

41KB
MD5

46bdb9d50ae95275d88695f773e3ed72
SHA1

33778431bff5f34a331bd15a3025bafe3fd76197
SHA256

c181ec70bfb70b605977f435fffd1933be9f36de72b8a6a0531ab2c6f322e614
SHA512

d1c4c4edbeb296b4a9839c5cf34d4d91be83f01e13a39e3ace202977b9a63282556a32c03bfea2292bea5a7edead36b1b7beb7de37a6f47a39a58864bb6abf7f
SSDEEP

768:dIkFZdVUyjRtS5ES4p+Vh1Fs8OAjiiup9yqxBxKWCA5sIqcT0:TXRtmES4YVhrKAbup9BHaAGzcT0

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe C:\\Windows\\system32\\csmm.exe"	c181ec70bfb70b605977f435fffd1933be9f36de72b8a6a0531ab2c6f322e614.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe C:\\Windows\\system32\\csmm.exe"	csmm.exe

Executes dropped EXE 2 IoCs

pid	Process
5100	csmm.exe
5060	csmm.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\csmm.exe	c181ec70bfb70b605977f435fffd1933be9f36de72b8a6a0531ab2c6f322e614.exe
File opened for modification	C:\Windows\SysWOW64\csmm.exe	csmm.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
676	c181ec70bfb70b605977f435fffd1933be9f36de72b8a6a0531ab2c6f322e614.exe
5100	csmm.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
676	c181ec70bfb70b605977f435fffd1933be9f36de72b8a6a0531ab2c6f322e614.exe
5100	csmm.exe
5060	csmm.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 676 wrote to memory of 5100	676	c181ec70bfb70b605977f435fffd1933be9f36de72b8a6a0531ab2c6f322e614.exe	83
PID 676 wrote to memory of 5100	676	c181ec70bfb70b605977f435fffd1933be9f36de72b8a6a0531ab2c6f322e614.exe	83
PID 676 wrote to memory of 5100	676	c181ec70bfb70b605977f435fffd1933be9f36de72b8a6a0531ab2c6f322e614.exe	83
PID 5100 wrote to memory of 5060	5100	csmm.exe	84
PID 5100 wrote to memory of 5060	5100	csmm.exe	84
PID 5100 wrote to memory of 5060	5100	csmm.exe	84

C:\Users\Admin\AppData\Local\Temp\c181ec70bfb70b605977f435fffd1933be9f36de72b8a6a0531ab2c6f322e614.exe
"C:\Users\Admin\AppData\Local\Temp\c181ec70bfb70b605977f435fffd1933be9f36de72b8a6a0531ab2c6f322e614.exe"
1⤵
- Modifies WinLogon for persistence
- Drops file in System32 directory
- Suspicious use of FindShellTrayWindow
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:676
- C:\Windows\SysWOW64\csmm.exe
  C:\Windows\system32\csmm.exe
  2⤵
  - Modifies WinLogon for persistence
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5100
- - C:\Windows\SysWOW64\csmm.exe
    C:\Windows\system32\csmm.exe
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    PID:5060

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Winlogon Helper DLL

T1004

Privilege Escalation

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\csmm.exe

Filesize
41KB

MD5
560f08ad9f8f3c9f7743cdbf59ffea5b

SHA1
a645e552242226befb6aa93c89e3b57be20998be

SHA256
723b9bdbb753d95fe5f4cea605542eb0d0f68403e24350150777b945916bc6c8

SHA512
8d37b9bcfc5300eb4aeda5bfca5b5660ac011f2e602ca41e90ae8c13697d535ee0780c363519a3fc5cee3b3cc945946aebb37707f29ed521bbd3ac1d51a37f98

Download Submit
C:\Windows\SysWOW64\csmm.exe

Filesize
41KB

MD5
560f08ad9f8f3c9f7743cdbf59ffea5b

SHA1
a645e552242226befb6aa93c89e3b57be20998be

SHA256
723b9bdbb753d95fe5f4cea605542eb0d0f68403e24350150777b945916bc6c8

SHA512
8d37b9bcfc5300eb4aeda5bfca5b5660ac011f2e602ca41e90ae8c13697d535ee0780c363519a3fc5cee3b3cc945946aebb37707f29ed521bbd3ac1d51a37f98

Download Submit
C:\Windows\SysWOW64\csmm.exe

Filesize
41KB

MD5
560f08ad9f8f3c9f7743cdbf59ffea5b

SHA1
a645e552242226befb6aa93c89e3b57be20998be

SHA256
723b9bdbb753d95fe5f4cea605542eb0d0f68403e24350150777b945916bc6c8

SHA512
8d37b9bcfc5300eb4aeda5bfca5b5660ac011f2e602ca41e90ae8c13697d535ee0780c363519a3fc5cee3b3cc945946aebb37707f29ed521bbd3ac1d51a37f98

Download Submit