f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2

General

Target

f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2.exe
Size

118KB
MD5

5175cc7097c1318dd1904a4b6a0fac80
SHA1

4091523c3e54988105c36991470b04cb037c800a
SHA256

f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2
SHA512

a2ae99b9241443985c168c2286d860f6b29106d5df063a4d9fdb5f4ba7e429a1aa27c8533931d29515f146d0b0e08837263401914334d4f8e48ab90fc84df5f2
SSDEEP

1536:5apynTL/YDx3p3Af/2rLWDBnIQrBzZT4nedyqJf1zwQVgHDRJKZ:5apuTSxNAfpnIazJU4/Z1zwLHNJKZ

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-1-5-21-929662420-1054238289-2961194603-1000\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-1-5-21-929662420-1054238289-2961194603-1000\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
508	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	f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2.exe
File opened for modification	C:\Windows\userinit.exe	f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2.exe
File created	C:\Windows\kdcoms.dll	userinit.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4328	f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2.exe
4328	f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2.exe
508	userinit.exe
508	userinit.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
508	userinit.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4328	f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2.exe
4328	f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2.exe
508	userinit.exe
508	userinit.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4328 wrote to memory of 508	4328	f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2.exe	83
PID 4328 wrote to memory of 508	4328	f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2.exe	83
PID 4328 wrote to memory of 508	4328	f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2.exe	83

C:\Users\Admin\AppData\Local\Temp\f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2.exe
"C:\Users\Admin\AppData\Local\Temp\f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4328
- 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:508

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
118KB

MD5
5175cc7097c1318dd1904a4b6a0fac80

SHA1
4091523c3e54988105c36991470b04cb037c800a

SHA256
f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2

SHA512
a2ae99b9241443985c168c2286d860f6b29106d5df063a4d9fdb5f4ba7e429a1aa27c8533931d29515f146d0b0e08837263401914334d4f8e48ab90fc84df5f2

Download Submit
C:\Windows\userinit.exe

Filesize
118KB

MD5
5175cc7097c1318dd1904a4b6a0fac80

SHA1
4091523c3e54988105c36991470b04cb037c800a

SHA256
f63a91b10d39b54b382db8236caa3cca8c6686988da7510c4d159e68d0d811d2

SHA512
a2ae99b9241443985c168c2286d860f6b29106d5df063a4d9fdb5f4ba7e429a1aa27c8533931d29515f146d0b0e08837263401914334d4f8e48ab90fc84df5f2

Download Submit
memory/508-137-0x0000000000000000-mapping.dmp

Download
memory/508-144-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download
memory/508-145-0x0000000000030000-0x0000000000033000-memory.dmp

Filesize
12KB

Download
memory/508-146-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download
memory/4328-132-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download
memory/4328-133-0x0000000000030000-0x0000000000033000-memory.dmp

Filesize
12KB

Download
memory/4328-143-0x0000000000400000-0x0000000000443000-memory.dmp

Filesize
268KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads