b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712

Analysis

max time kernel
184s
max time network
189s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
29/10/2022, 13:06

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General

Target
b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712.exe
Size 269KB
Sample221029-qb4taahcfj
SHA256 b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712
MD5 ff3be7a2ec1d2452f08de1feec2deb2f
SHA1 b842e504a0e84e44ae7b876f3543cf6f2dcae6a9
SHA512 14469a2bd770cb38f29c8db885ce4ddc10b32cbf64fb62787570cd1347d22d6c0bfb589f3524948ab50c556783970666331ce722a72770c8a7b5225cb7117db8
SSDEEP 6144:YltHeS9enNwHqOu5Dx7tZrRbl+pXOV7yKM+mvSFz9jEhHMIVq1rl:AtHeNn2KOiJZrRJ+0V72+19jqsIVq1B
MD5 SHA1 SHA512 SSDEEP

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\Userinit = "userinit.exe,\"C:\\Windows\\system32\\clientsvr.exe\""	server.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\shell = "explorer.exe,\"C:\\ProgramData\\635701\\server.exe\""	server.exe

Executes dropped EXE 3 IoCs

pid	Process
984	D0fMEQKUz0.exe
4872	tmpE182.tmp.exe
4092	server.exe

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	D0fMEQKUz0.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	tmpE182.tmp.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\D0fMEQKUz0.url	b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\microsoft update = "\"C:\\ProgramData\\635701\\server.exe\""	server.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\clientsvr.exe	server.exe
File opened for modification	C:\Windows\SysWOW64\clientsvr.exe	server.exe

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

System Information Discovery
T1082

Runs ping.exe 1 TTPs 2 IoCs

Remote System Discovery

T1018

pid	Process
4308	PING.EXE
644	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4092	server.exe
4092	server.exe
4092	server.exe
4092	server.exe
4092	server.exe
4092	server.exe
4092	server.exe
4092	server.exe
4092	server.exe
4092	server.exe
4092	server.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4900	b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712.exe
Token: SeDebugPrivilege	984	D0fMEQKUz0.exe
Token: SeDebugPrivilege	4092	server.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4092	server.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 4900 wrote to memory of 4020	4900	b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712.exe	86
PID 4900 wrote to memory of 4020	4900	b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712.exe	86
PID 4900 wrote to memory of 4020	4900	b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712.exe	86
PID 4020 wrote to memory of 4308	4020	cmd.exe	88
PID 4020 wrote to memory of 4308	4020	cmd.exe	88
PID 4020 wrote to memory of 4308	4020	cmd.exe	88
PID 4900 wrote to memory of 984	4900	b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712.exe	93
PID 4900 wrote to memory of 984	4900	b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712.exe	93
PID 4900 wrote to memory of 984	4900	b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712.exe	93
PID 984 wrote to memory of 4828	984	D0fMEQKUz0.exe	95
PID 984 wrote to memory of 4828	984	D0fMEQKUz0.exe	95
PID 984 wrote to memory of 4828	984	D0fMEQKUz0.exe	95
PID 4828 wrote to memory of 644	4828	cmd.exe	96
PID 4828 wrote to memory of 644	4828	cmd.exe	96
PID 4828 wrote to memory of 644	4828	cmd.exe	96
PID 984 wrote to memory of 4872	984	D0fMEQKUz0.exe	97
PID 984 wrote to memory of 4872	984	D0fMEQKUz0.exe	97
PID 984 wrote to memory of 4872	984	D0fMEQKUz0.exe	97
PID 4872 wrote to memory of 4092	4872	tmpE182.tmp.exe	98
PID 4872 wrote to memory of 4092	4872	tmpE182.tmp.exe	98
PID 4872 wrote to memory of 4092	4872	tmpE182.tmp.exe	98

C:\Users\Admin\AppData\Local\Temp\b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712.exe
"C:\Users\Admin\AppData\Local\Temp\b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4900
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c PING 8.8.8.8 -n 10 > nul
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4020
- - C:\Windows\SysWOW64\PING.EXE
    PING 8.8.8.8 -n 10
    3⤵
    - Runs ping.exe
    PID:4308
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\D0fMEQKUz0.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\D0fMEQKUz0.exe"
  2⤵
  - Executes dropped EXE
  - Checks computer location settings
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:984
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c PING 8.8.8.8 -n 10 > nul
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4828
  - - C:\Windows\SysWOW64\PING.EXE
      PING 8.8.8.8 -n 10
      4⤵
      Runs ping.exe
      PID:644
- - C:\Users\Admin\AppData\Local\Temp\tmpE182.tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmpE182.tmp.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:4872
  - - C:\ProgramData\635701\server.exe
      "C:\ProgramData\635701\server.exe"
      4⤵
      Modifies WinLogon for persistence
      Executes dropped EXE
      Adds Run key to start application
      Drops file in System32 directory
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:4092

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

Query Registry

T1012

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

server.exe

Path C:\ProgramData\635701\server.exe
Size 222KB
SHA256 29fe5df448b8b33fdf3c210e21a2ba8bcba016023b8c0c3f49e531430edf17bc
MD5 a40fe2a8fd22909db1e64d47820f7e7a
SHA1 319648067cd94d2144209afc54e1f941fffa66d1
SHA512 520450105f630f9b78fbb319720a430efc95b569e0eef598fc5ab718a90093adadf13b6badc7c0a68f108a2861581b44b3c29e76355e7bea017b20272aa269e7
SSDEEP 3072:8U4f+fkjZt7fF0L2vMCDiu0Y8RxwLRMcR9aBeWvfxLWDwaeWJ2NJucbPvJ1nlYZC:81i+f3uBmLbR9JWJWnJYJuEvPr
MD5 SHA1 SHA512 SSDEEP

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server.exe

Path C:\ProgramData\635701\server.exe
Size 222KB
SHA256 29fe5df448b8b33fdf3c210e21a2ba8bcba016023b8c0c3f49e531430edf17bc
MD5 a40fe2a8fd22909db1e64d47820f7e7a
SHA1 319648067cd94d2144209afc54e1f941fffa66d1
SHA512 520450105f630f9b78fbb319720a430efc95b569e0eef598fc5ab718a90093adadf13b6badc7c0a68f108a2861581b44b3c29e76355e7bea017b20272aa269e7
SSDEEP 3072:8U4f+fkjZt7fF0L2vMCDiu0Y8RxwLRMcR9aBeWvfxLWDwaeWJ2NJucbPvJ1nlYZC:81i+f3uBmLbR9JWJWnJYJuEvPr
MD5 SHA1 SHA512 SSDEEP

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tmpE182.tmp.exe

Path C:\Users\Admin\AppData\Local\Temp\tmpE182.tmp.exe
Size 222KB
SHA256 29fe5df448b8b33fdf3c210e21a2ba8bcba016023b8c0c3f49e531430edf17bc
MD5 a40fe2a8fd22909db1e64d47820f7e7a
SHA1 319648067cd94d2144209afc54e1f941fffa66d1
SHA512 520450105f630f9b78fbb319720a430efc95b569e0eef598fc5ab718a90093adadf13b6badc7c0a68f108a2861581b44b3c29e76355e7bea017b20272aa269e7
SSDEEP 3072:8U4f+fkjZt7fF0L2vMCDiu0Y8RxwLRMcR9aBeWvfxLWDwaeWJ2NJucbPvJ1nlYZC:81i+f3uBmLbR9JWJWnJYJuEvPr
MD5 SHA1 SHA512 SSDEEP

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tmpE182.tmp.exe

Path C:\Users\Admin\AppData\Local\Temp\tmpE182.tmp.exe
Size 222KB
SHA256 29fe5df448b8b33fdf3c210e21a2ba8bcba016023b8c0c3f49e531430edf17bc
MD5 a40fe2a8fd22909db1e64d47820f7e7a
SHA1 319648067cd94d2144209afc54e1f941fffa66d1
SHA512 520450105f630f9b78fbb319720a430efc95b569e0eef598fc5ab718a90093adadf13b6badc7c0a68f108a2861581b44b3c29e76355e7bea017b20272aa269e7
SSDEEP 3072:8U4f+fkjZt7fF0L2vMCDiu0Y8RxwLRMcR9aBeWvfxLWDwaeWJ2NJucbPvJ1nlYZC:81i+f3uBmLbR9JWJWnJYJuEvPr
MD5 SHA1 SHA512 SSDEEP

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D0fMEQKUz0.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\D0fMEQKUz0.exe
Size 269KB
SHA256 b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712
MD5 ff3be7a2ec1d2452f08de1feec2deb2f
SHA1 b842e504a0e84e44ae7b876f3543cf6f2dcae6a9
SHA512 14469a2bd770cb38f29c8db885ce4ddc10b32cbf64fb62787570cd1347d22d6c0bfb589f3524948ab50c556783970666331ce722a72770c8a7b5225cb7117db8
SSDEEP 6144:YltHeS9enNwHqOu5Dx7tZrRbl+pXOV7yKM+mvSFz9jEhHMIVq1rl:AtHeNn2KOiJZrRJ+0V72+19jqsIVq1B
MD5 SHA1 SHA512 SSDEEP

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D0fMEQKUz0.exe

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\D0fMEQKUz0.exe
Size 269KB
SHA256 b0243b6fdfc0c1ad296299bc4424a13cc2c7c9808bf331c07041261d06c9b712
MD5 ff3be7a2ec1d2452f08de1feec2deb2f
SHA1 b842e504a0e84e44ae7b876f3543cf6f2dcae6a9
SHA512 14469a2bd770cb38f29c8db885ce4ddc10b32cbf64fb62787570cd1347d22d6c0bfb589f3524948ab50c556783970666331ce722a72770c8a7b5225cb7117db8
SSDEEP 6144:YltHeS9enNwHqOu5Dx7tZrRbl+pXOV7yKM+mvSFz9jEhHMIVq1rl:AtHeNn2KOiJZrRJ+0V72+19jqsIVq1B
MD5 SHA1 SHA512 SSDEEP

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memory/984-147-0x0000000074880000-0x0000000074E31000-memory.dmp

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memory/984-140-0x0000000074880000-0x0000000074E31000-memory.dmp

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memory/984-143-0x0000000074880000-0x0000000074E31000-memory.dmp

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memory/4092-152-0x0000000074880000-0x0000000074E31000-memory.dmp

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memory/4092-154-0x0000000074880000-0x0000000074E31000-memory.dmp

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memory/4872-148-0x0000000074880000-0x0000000074E31000-memory.dmp

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memory/4872-153-0x0000000074880000-0x0000000074E31000-memory.dmp

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memory/4900-139-0x0000000074880000-0x0000000074E31000-memory.dmp

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memory/4900-132-0x0000000074880000-0x0000000074E31000-memory.dmp

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memory/4900-133-0x0000000074880000-0x0000000074E31000-memory.dmp

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