Overview

overview

10

Static

static

3

cryptolaemus

windows10-2004-x64

10

cryptolaemus

windows11-21h2-x64

10

Analysis

  • max time kernel
    142s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06-09-2024 07:27

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General

  • Target

    938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe

  • Size

    213KB

  • MD5

    4b549fa8c31524128d8ad39c341adc12

  • SHA1

    8679f2cd0dc019eb40cf6adf54d033092c844fef

  • SHA256

    938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3

  • SHA512

    9eb6d5ab732285eb7888b4714110fdc709e48400c09a3e9c6e64caf3fec3c82b6793d8de3761f72367487552f0c7dba725345ed10998583216d46a39f99dab74

  • SSDEEP

    6144:/zDXnqPnz5H7Mh27ROOSxJ/z/MB0Vdh1GQ:/nXq/z5H7Mho38/rVdz

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

    trojantofsee
  • Creates new service(s) 2 TTPs
    persistenceexecution
  • Modifies Windows Firewall 2 TTPs 1 IoCs
    evasion
  • Sets service image path in registry 2 TTPs 1 IoCs
    persistence
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe 3 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

    persistenceprivilege_escalation
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe
    "C:\Users\Admin\AppData\Local\Temp\938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:548
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\pywygqkm\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2788
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wmixskiq.exe" C:\Windows\SysWOW64\pywygqkm\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3172
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create pywygqkm binPath= "C:\Windows\SysWOW64\pywygqkm\wmixskiq.exe /d\"C:\Users\Admin\AppData\Local\Temp\938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4672
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description pywygqkm "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:372
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start pywygqkm
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4984
    • C:\Windows\SysWOW64\netsh.exe
      "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
      2⤵
      • Modifies Windows Firewall
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:3100
  • C:\Windows\SysWOW64\pywygqkm\wmixskiq.exe
    C:\Windows\SysWOW64\pywygqkm\wmixskiq.exe /d"C:\Users\Admin\AppData\Local\Temp\938bdaad404914635b4acc4510fe1121b28c2131aeaa308783c3588e628347b3.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4976
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:1692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Defense Evasion

Impair Defenses

1
T1562

Disable or Modify System Firewall

1
T1562.004

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\wmixskiq.exe
    Filesize

    14.3MB

    MD5

    46f8cb154f6114ede449cb81a8dad619

    SHA1

    4a96037e9b50606056e3f2d61adae85a01e5f91a

    SHA256

    136ed620b5e8d0fe4b8a85d195bf2fc16501354e6bbe4419d5abc0bc97fd50b6

    SHA512

    1eff1e293a2958fa29d490fb57d89d9535b8d79744f60503551b28130a6e9a26699320e7d45d28a46832c4be998d108280baabad1db8e77eaf3232f5cf9905b0

    Download Submit

  • memory/548-12-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/548-2-0x0000000002190000-0x00000000021A3000-memory.dmp

    Filesize

    76KB

    Download

  • memory/548-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/548-8-0x00000000004E0000-0x00000000005E0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/548-7-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/548-1-0x00000000004E0000-0x00000000005E0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/548-11-0x0000000002190000-0x00000000021A3000-memory.dmp

    Filesize

    76KB

    Download

  • memory/1692-49-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-46-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-14-0x0000000000F50000-0x0000000000F65000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1692-23-0x0000000002E00000-0x000000000300F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/1692-18-0x0000000000F50000-0x0000000000F65000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1692-19-0x0000000000F50000-0x0000000000F65000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1692-34-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-54-0x0000000007D40000-0x000000000814B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/1692-58-0x00000000033D0000-0x00000000033D7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/1692-57-0x0000000007D40000-0x000000000814B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/1692-53-0x00000000025F0000-0x00000000025F5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/1692-50-0x00000000025F0000-0x00000000025F5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/1692-30-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-48-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-47-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-33-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-45-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-44-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-43-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-42-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-41-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-40-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-39-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-38-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-37-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-36-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-35-0x0000000002520000-0x0000000002530000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1692-27-0x0000000002510000-0x0000000002516000-memory.dmp

    Filesize

    24KB

    Download

  • memory/1692-26-0x0000000002E00000-0x000000000300F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/4976-13-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/4976-10-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download

  • memory/4976-16-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

    Download