e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341

General

Target

e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341.exe
Size

312KB
MD5

20bd58fce2a943e3bc08e923e168eee0
SHA1

a74ade7de011c3872099cde2f8f7feec042a8f26
SHA256

e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341
SHA512

6ebc7ae8986e115f3969c0a35eb453ee89bc4c30cdd26f0c58ad82fa6ba6142509a49a4cc830db42731fcb91d7b0d02edd5025c5b15ecfbc610a598df59f297f
SSDEEP

6144:j1z30V7g209M3oCEqbF0gv9sPbxGOxHXzNMzN41z:jlEV7BSOEqh0gvKjRjSel

Score

10^/10

evasion 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\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\Windows\\\\system32\\userinit.exe,"	userinit.exe

Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\HideFileExt = "1"	userinit.exe

Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1158

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ShowSuperHidden = "0"	userinit.exe

Drops file in Drivers directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\drivers\etc\hosts	userinit.exe
File created	C:\Windows\system32\drivers\etc\hosts	userinit.exe

Executes dropped EXE 1 IoCs

pid	Process
776	userinit.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\MACHINE\SOFTWARE\Wow6432Node\MICROSOFT\WINDOWS\CURRENTVERSION\RUN	userinit.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\RUN\userinit = "C:\\Windows\\userinit.exe"	userinit.exe

Drops file in Windows directory 3 IoCs

description	ioc	Process
File created	C:\Windows\userinit.exe	e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341.exe
File opened for modification	C:\Windows\userinit.exe	e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341.exe
File created	C:\Windows\kdcoms.dll	userinit.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2032	e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341.exe
776	userinit.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
776	userinit.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2032	e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341.exe
2032	e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341.exe
776	userinit.exe
776	userinit.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 776	2032	e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341.exe	28
PID 2032 wrote to memory of 776	2032	e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341.exe	28
PID 2032 wrote to memory of 776	2032	e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341.exe	28
PID 2032 wrote to memory of 776	2032	e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341.exe	28

C:\Users\Admin\AppData\Local\Temp\e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341.exe
"C:\Users\Admin\AppData\Local\Temp\e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Windows\userinit.exe
  C:\Windows\userinit.exe
  2⤵
  - Modifies WinLogon for persistence
  - Modifies visibility of file extensions in Explorer
  - Modifies visiblity of hidden/system files in Explorer
  - Drops file in Drivers directory
  - Executes dropped EXE
  - Adds Run key to start application
  - Drops file in Windows directory
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  PID:776

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

2

T1158

Registry Run Keys / Startup Folder

Winlogon Helper DLL

Privilege Escalation

Defense Evasion

Hidden Files and Directories

Modify Registry

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\userinit.exe

Filesize
312KB

MD5
20bd58fce2a943e3bc08e923e168eee0

SHA1
a74ade7de011c3872099cde2f8f7feec042a8f26

SHA256
e55cb0bb1ddb3ac6c67c7b15ef6064fa11b469ff0b9b696c86831b55f9e75341

SHA512
6ebc7ae8986e115f3969c0a35eb453ee89bc4c30cdd26f0c58ad82fa6ba6142509a49a4cc830db42731fcb91d7b0d02edd5025c5b15ecfbc610a598df59f297f

Download Submit
memory/776-66-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/776-67-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2032-56-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/2032-58-0x0000000076381000-0x0000000076383000-memory.dmp

Filesize
8KB

Download
memory/2032-65-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads