a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3

General

Target

a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe
Size

1.1MB
MD5

53f03e54600ad28c18c3baee560c4d6e
SHA1

4d1967c7bd413359175db965d3e098747253923f
SHA256

a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3
SHA512

7f59ecb46927a7b60cf499990fff03bb54485f3f575cca2dd30a33bacb5c6f39ab10c65f9b57ed50b9cac3598bf6aa250b48a85783d5e95b3442f5308e5e8bc6
SSDEEP

12288:mJeJfEuGstUg/Tjp98zvpie5tojX0vBSVP+zBUWb9lx/9:mJeJfAqTjp98zvpieToL0BC29nPx/

Score

10^/10

evasion 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 "	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "Explorer.exe regsvr.exe"	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe

Disables RegEdit via registry modification 2 IoCs

evasion

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe
Set value (int)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "0"	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe

Disables Task Manager via registry modification
evasion

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\Msn Messsenger = "C:\\Windows\\system32\\regsvr.exe"	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe

AutoIT Executable 2 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral1/memory/892-54-0x0000000000400000-0x00000000004DB000-memory.dmp	autoit_exe
behavioral1/memory/892-62-0x0000000000400000-0x00000000004DB000-memory.dmp	autoit_exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\28463	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe
File created	C:\Windows\SysWOW64\regsvr.exe	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe
File opened for modification	C:\Windows\SysWOW64\regsvr.exe	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe
File created	C:\Windows\SysWOW64\svchost .exe	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe
File opened for modification	C:\Windows\SysWOW64\svchost .exe	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe
File opened for modification	C:\Windows\SysWOW64\setup.ini	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\regsvr.exe	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe
File opened for modification	C:\Windows\regsvr.exe	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 892 wrote to memory of 1244	892	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe	28
PID 892 wrote to memory of 1244	892	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe	28
PID 892 wrote to memory of 1244	892	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe	28
PID 892 wrote to memory of 1244	892	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe	28
PID 1244 wrote to memory of 468	1244	cmd.exe	30
PID 1244 wrote to memory of 468	1244	cmd.exe	30
PID 1244 wrote to memory of 468	1244	cmd.exe	30
PID 1244 wrote to memory of 468	1244	cmd.exe	30
PID 892 wrote to memory of 840	892	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe	31
PID 892 wrote to memory of 840	892	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe	31
PID 892 wrote to memory of 840	892	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe	31
PID 892 wrote to memory of 840	892	a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe	31
PID 840 wrote to memory of 1012	840	cmd.exe	33
PID 840 wrote to memory of 1012	840	cmd.exe	33
PID 840 wrote to memory of 1012	840	cmd.exe	33
PID 840 wrote to memory of 1012	840	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe
"C:\Users\Admin\AppData\Local\Temp\a66a5c0b59c3602277e625bb86be57c372dea75597bb2ff5840f2ce316ec0fd3.exe"
1⤵
- Modifies WinLogon for persistence
- Disables RegEdit via registry modification
- Adds Run key to start application
- Drops file in System32 directory
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:892
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /C AT /delete /yes
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1244
- - C:\Windows\SysWOW64\at.exe
    AT /delete /yes
    3⤵
    PID:468
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /C AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\svchost .exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:840
- - C:\Windows\SysWOW64\at.exe
    AT 09:00 /interactive /EVERY:m,t,w,th,f,s,su C:\Windows\system32\svchost .exe
    3⤵
    PID:1012

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/892-54-0x0000000000400000-0x00000000004DB000-memory.dmp

Filesize
876KB

Download
memory/892-55-0x00000000759F1000-0x00000000759F3000-memory.dmp

Filesize
8KB

Download
memory/892-62-0x0000000000400000-0x00000000004DB000-memory.dmp

Filesize
876KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads