a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d

Analysis

max time kernel
91s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
21/11/2022, 22:50

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General

Target

a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe
Size

956KB
MD5

f0ba3e024f2a47d900bc967a4bbe2237
SHA1

4741e93ffdac29a621d36eaf64d162c3680d2eef
SHA256

a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d
SHA512

7cc3366e86fcbff9cbd8db0b6fc39af67cb26770cbc5b9de69f71d4840e1d4b7cc93a84ad79f9d97761355dceef451dff2370d07f0d69ca5ed337191367cb628
SSDEEP

12288:ThkDgouVA2nxKkorvdRgQriDwOIxmxiZnYQE7PJcE4aTT71ciV0UGwqCnImURr1C:ZRmJkcoQricOIQxiZY1iaTT7aipGPCII

Score

10^/10

persistence

Malware Config

Signatures

Modifies WinLogon for persistence 2 TTPs 1 IoCs

persistence

Winlogon Helper DLL

T1004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "%AppData%\\Microsoft\\winlogon.exe,explorer.exe"	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe

Adds policy 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-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Microsoft(R) Delayed Launcher = "%AppData%\\Microsoft\\winlogon.exe"	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe

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-1-5-21-2891029575-1462575-1165213807-1000\Software\Microsoft\Windows\CurrentVersion\Run	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft(R) Delayed Launcher = "%AppData%\\Microsoft\\winlogon.exe"	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4916 set thread context of 3088	4916	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe	80

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1476	3088	WerFault.exe	80

Suspicious use of FindShellTrayWindow 4 IoCs

pid	Process
4916	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe
4916	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe
4916	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe
4916	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe

Suspicious use of SendNotifyMessage 4 IoCs

pid	Process
4916	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe
4916	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe
4916	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe
4916	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4916 wrote to memory of 3088	4916	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe	80
PID 4916 wrote to memory of 3088	4916	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe	80
PID 4916 wrote to memory of 3088	4916	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe	80
PID 4916 wrote to memory of 3088	4916	a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe	80

C:\Users\Admin\AppData\Local\Temp\a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe
"C:\Users\Admin\AppData\Local\Temp\a4c65435f360ffd8e0c3d0b3bbc189385e1fa228b7be441abe3c542d27f0d04d.exe"
1⤵
- Modifies WinLogon for persistence
- Adds policy Run key to start application
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:4916
- C:\Windows\SysWOW64\svchost.exe
  "C:\Windows\System32\svchost.exe"
  2⤵
  PID:3088
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 3088 -s 88
    3⤵
    - Program crash
    PID:1476

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3088 -ip 3088
1⤵
PID:3144

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Winlogon Helper DLL

T1004

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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