5feb9bcecc3733f53313b37131391a9679de7cec617aa118c90adb8fa5f6a7a0

Analysis

max time kernel
181s
max time network
189s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
29/02/2024, 03:52

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General

Target

ad9e213371def953f33a43461e9e6630.exe
Size

240KB
MD5

ad9e213371def953f33a43461e9e6630
SHA1

98fc4e34879ad76ae460f799a14cc7d4ceab109e
SHA256

5feb9bcecc3733f53313b37131391a9679de7cec617aa118c90adb8fa5f6a7a0
SHA512

e5b6554370c8d7cad82979180637511b994d22edf9a24281107917092de5fb60a9804888280dc4bb1050f95d80e23c848619d9902c4f7a0da9bb12a4d9299f2b
SSDEEP

6144:g77v/p3qOZouTiy64tWH0OVxePeazTSIYnz:g7753qOrK9VxePe+Sd

Score

10^/10

bootkit evasion persistence

Malware Config

Signatures

Modifies firewall policy service 2 TTPs 4 IoCs

evasion

Modify Registry

T1112

Windows Service

T1543.003

description	ioc	Process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List	ad9e213371def953f33a43461e9e6630.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile	ad9e213371def953f33a43461e9e6630.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications	ad9e213371def953f33a43461e9e6630.exe
Set value (str)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\C:\Users\Public\S-3685-5437-5687\winsrvn.exe = "C:\\Users\\Public\\S-3685-5437-5687\\winsrvn.exe:*:Enabled:MSNUpdateServices"	ad9e213371def953f33a43461e9e6630.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation	ad9e213371def953f33a43461e9e6630.exe

Executes dropped EXE 3 IoCs

pid	Process
4812	winsrvn.exe
1436	winsrvn.exe
1592	winsrvn.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-609813121-2907144057-1731107329-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSNUpdateServices = "C:\\Users\\Public\\S-3685-5437-5687\\winsrvn.exe"	ad9e213371def953f33a43461e9e6630.exe

Writes to the Master Boot Record (MBR) 1 TTPs 2 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	ad9e213371def953f33a43461e9e6630.exe
File opened for modification	\??\PhysicalDrive0	winsrvn.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4704 set thread context of 3060	4704	ad9e213371def953f33a43461e9e6630.exe	85
PID 3060 set thread context of 4976	3060	ad9e213371def953f33a43461e9e6630.exe	87
PID 4812 set thread context of 1436	4812	winsrvn.exe	93
PID 1436 set thread context of 1592	1436	winsrvn.exe	94

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	ad9e213371def953f33a43461e9e6630.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
4704	ad9e213371def953f33a43461e9e6630.exe
3060	ad9e213371def953f33a43461e9e6630.exe
4812	winsrvn.exe
1436	winsrvn.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 4704 wrote to memory of 3060	4704	ad9e213371def953f33a43461e9e6630.exe	85
PID 4704 wrote to memory of 3060	4704	ad9e213371def953f33a43461e9e6630.exe	85
PID 4704 wrote to memory of 3060	4704	ad9e213371def953f33a43461e9e6630.exe	85
PID 4704 wrote to memory of 3060	4704	ad9e213371def953f33a43461e9e6630.exe	85
PID 4704 wrote to memory of 3060	4704	ad9e213371def953f33a43461e9e6630.exe	85
PID 4704 wrote to memory of 3060	4704	ad9e213371def953f33a43461e9e6630.exe	85
PID 4704 wrote to memory of 3060	4704	ad9e213371def953f33a43461e9e6630.exe	85
PID 4704 wrote to memory of 3060	4704	ad9e213371def953f33a43461e9e6630.exe	85
PID 3060 wrote to memory of 4976	3060	ad9e213371def953f33a43461e9e6630.exe	87
PID 3060 wrote to memory of 4976	3060	ad9e213371def953f33a43461e9e6630.exe	87
PID 3060 wrote to memory of 4976	3060	ad9e213371def953f33a43461e9e6630.exe	87
PID 3060 wrote to memory of 4976	3060	ad9e213371def953f33a43461e9e6630.exe	87
PID 3060 wrote to memory of 4976	3060	ad9e213371def953f33a43461e9e6630.exe	87
PID 3060 wrote to memory of 4976	3060	ad9e213371def953f33a43461e9e6630.exe	87
PID 3060 wrote to memory of 4976	3060	ad9e213371def953f33a43461e9e6630.exe	87
PID 3060 wrote to memory of 4976	3060	ad9e213371def953f33a43461e9e6630.exe	87
PID 4976 wrote to memory of 4812	4976	ad9e213371def953f33a43461e9e6630.exe	91
PID 4976 wrote to memory of 4812	4976	ad9e213371def953f33a43461e9e6630.exe	91
PID 4976 wrote to memory of 4812	4976	ad9e213371def953f33a43461e9e6630.exe	91
PID 4812 wrote to memory of 1436	4812	winsrvn.exe	93
PID 4812 wrote to memory of 1436	4812	winsrvn.exe	93
PID 4812 wrote to memory of 1436	4812	winsrvn.exe	93
PID 4812 wrote to memory of 1436	4812	winsrvn.exe	93
PID 4812 wrote to memory of 1436	4812	winsrvn.exe	93
PID 4812 wrote to memory of 1436	4812	winsrvn.exe	93
PID 4812 wrote to memory of 1436	4812	winsrvn.exe	93
PID 4812 wrote to memory of 1436	4812	winsrvn.exe	93
PID 1436 wrote to memory of 1592	1436	winsrvn.exe	94
PID 1436 wrote to memory of 1592	1436	winsrvn.exe	94
PID 1436 wrote to memory of 1592	1436	winsrvn.exe	94
PID 1436 wrote to memory of 1592	1436	winsrvn.exe	94
PID 1436 wrote to memory of 1592	1436	winsrvn.exe	94
PID 1436 wrote to memory of 1592	1436	winsrvn.exe	94
PID 1436 wrote to memory of 1592	1436	winsrvn.exe	94
PID 1436 wrote to memory of 1592	1436	winsrvn.exe	94

C:\Users\Admin\AppData\Local\Temp\ad9e213371def953f33a43461e9e6630.exe
"C:\Users\Admin\AppData\Local\Temp\ad9e213371def953f33a43461e9e6630.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4704
- C:\Users\Admin\AppData\Local\Temp\ad9e213371def953f33a43461e9e6630.exe
  "C:\Users\Admin\AppData\Local\Temp\ad9e213371def953f33a43461e9e6630.exe"
  2⤵
  - Writes to the Master Boot Record (MBR)
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3060
- - C:\Users\Admin\AppData\Local\Temp\ad9e213371def953f33a43461e9e6630.exe
    "C:\Users\Admin\AppData\Local\Temp\ad9e213371def953f33a43461e9e6630.exe"
    3⤵
    - Modifies firewall policy service
    - Checks computer location settings
    - Adds Run key to start application
    - Modifies registry class
    - Suspicious use of WriteProcessMemory
    PID:4976
  - - C:\Users\Public\S-3685-5437-5687\winsrvn.exe
      "C:\Users\Public\S-3685-5437-5687\winsrvn.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:4812
    - - C:\Users\Public\S-3685-5437-5687\winsrvn.exe
        
        "C:\Users\Public\S-3685-5437-5687\winsrvn.exe"
        5⤵
        Executes dropped EXE
        Writes to the Master Boot Record (MBR)
        Suspicious use of SetThreadContext
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:1436
      - C:\Users\Public\S-3685-5437-5687\winsrvn.exe
        
        "C:\Users\Public\S-3685-5437-5687\winsrvn.exe"
        6⤵
        Executes dropped EXE
        
        PID:1592

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Public\S-3685-5437-5687\winsrvn.exe

Filesize
240KB

MD5
ad9e213371def953f33a43461e9e6630

SHA1
98fc4e34879ad76ae460f799a14cc7d4ceab109e

SHA256
5feb9bcecc3733f53313b37131391a9679de7cec617aa118c90adb8fa5f6a7a0

SHA512
e5b6554370c8d7cad82979180637511b994d22edf9a24281107917092de5fb60a9804888280dc4bb1050f95d80e23c848619d9902c4f7a0da9bb12a4d9299f2b

Download Submit
memory/1436-91-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1436-84-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/1592-89-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1592-114-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1592-108-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1592-102-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/1592-94-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/3060-61-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/3060-2-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/3060-4-0x0000000000400000-0x0000000000418000-memory.dmp

Filesize
96KB

Download
memory/4976-10-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4976-9-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download
memory/4976-7-0x0000000000400000-0x0000000000411000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads