Analysis

  • max time kernel
    181s
  • max time network
    189s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-04-2024 14:50

General

  • Target

    900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe

  • Size

    204KB

  • MD5

    1f57a9bb99804b8193ef503404bb7387

  • SHA1

    674710911110b4b45030b990dabb3c45fd095b3f

  • SHA256

    900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7

  • SHA512

    d93b6d24f3fdb267a0d43195bbba3494cb2734756e5e3090cea9e65c584d66ca5eb1842bda274f484a42dac89f2fb196a2ef83e9f8e70dad4ca4b1351c3acce7

  • SSDEEP

    3072:qfrB/GLaZdXUNc8iirJiM21K7uu+5Oiq08tJz5zoy887jImQpeBNMRDx/+cmH:qfrwclVORxv5z8kI1x2co

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.

  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • 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).

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe
    "C:\Users\Admin\AppData\Local\Temp\900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3268
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mupggtgl\
      2⤵
        PID:4336
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uoogjtxj.exe" C:\Windows\SysWOW64\mupggtgl\
        2⤵
          PID:2972
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create mupggtgl binPath= "C:\Windows\SysWOW64\mupggtgl\uoogjtxj.exe /d\"C:\Users\Admin\AppData\Local\Temp\900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1284
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description mupggtgl "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2536
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start mupggtgl
          2⤵
          • Launches sc.exe
          PID:740
        • 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
          PID:1060
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3268 -s 1208
          2⤵
          • Program crash
          PID:4376
      • C:\Windows\SysWOW64\mupggtgl\uoogjtxj.exe
        C:\Windows\SysWOW64\mupggtgl\uoogjtxj.exe /d"C:\Users\Admin\AppData\Local\Temp\900f15042c99288aef15c9187640b625ffec568147dd761f1508e9b61cc174d7.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2248
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:4680
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2248 -s 532
          2⤵
          • Program crash
          PID:3892
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 3268 -ip 3268
        1⤵
          PID:4288
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 500 -p 2248 -ip 2248
          1⤵
            PID:2848

          Network

          MITRE ATT&CK Matrix ATT&CK v13

          Persistence

          Create or Modify System Process

          2
          T1543

          Windows Service

          2
          T1543.003

          Boot or Logon Autostart Execution

          1
          T1547

          Registry Run Keys / Startup Folder

          1
          T1547.001

          Privilege Escalation

          Create or Modify System Process

          2
          T1543

          Windows Service

          2
          T1543.003

          Boot or Logon Autostart Execution

          1
          T1547

          Registry Run Keys / Startup Folder

          1
          T1547.001

          Defense Evasion

          Impair Defenses

          1
          T1562

          Disable or Modify System Firewall

          1
          T1562.004

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            14.1MB

            MD5

            3836fc9ce08f6693a7388ec397d3c8eb

            SHA1

            f5da3ea79a0544969053ea22784b0ab20ffb7e8b

            SHA256

            18fdcb0a49151eb6b9307a215dc95b9f00400acea71f2e8be4424dd74cbebcab

            SHA512

            884a745b331f6311ed58febb9d0a0dd13bdf9ac51c2c4cbfbb96c9028cff9fc0842603ef4087f1743667ff8fcb85549379628dae64631dec597239264e3207cf

          • memory/2248-20-0x0000000000400000-0x0000000000438000-memory.dmp
            Filesize

            224KB

          • memory/2248-13-0x00000000005F0000-0x00000000006F0000-memory.dmp
            Filesize

            1024KB

          • memory/2248-14-0x0000000000400000-0x0000000000438000-memory.dmp
            Filesize

            224KB

          • memory/3268-2-0x00000000006E0000-0x00000000006F3000-memory.dmp
            Filesize

            76KB

          • memory/3268-3-0x0000000000400000-0x0000000000438000-memory.dmp
            Filesize

            224KB

          • memory/3268-5-0x0000000000400000-0x0000000000438000-memory.dmp
            Filesize

            224KB

          • memory/3268-7-0x0000000000700000-0x0000000000800000-memory.dmp
            Filesize

            1024KB

          • memory/3268-9-0x00000000006E0000-0x00000000006F3000-memory.dmp
            Filesize

            76KB

          • memory/3268-12-0x0000000000400000-0x0000000000438000-memory.dmp
            Filesize

            224KB

          • memory/3268-1-0x0000000000700000-0x0000000000800000-memory.dmp
            Filesize

            1024KB

          • memory/4680-38-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-46-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-21-0x00000000012E0000-0x00000000012F5000-memory.dmp
            Filesize

            84KB

          • memory/4680-23-0x00000000012E0000-0x00000000012F5000-memory.dmp
            Filesize

            84KB

          • memory/4680-27-0x00000000012E0000-0x00000000012F5000-memory.dmp
            Filesize

            84KB

          • memory/4680-28-0x0000000003000000-0x000000000320F000-memory.dmp
            Filesize

            2.1MB

          • memory/4680-31-0x0000000003000000-0x000000000320F000-memory.dmp
            Filesize

            2.1MB

          • memory/4680-32-0x00000000027D0000-0x00000000027D6000-memory.dmp
            Filesize

            24KB

          • memory/4680-35-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-16-0x00000000012E0000-0x00000000012F5000-memory.dmp
            Filesize

            84KB

          • memory/4680-39-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-40-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-42-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-41-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-43-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-19-0x00000000012E0000-0x00000000012F5000-memory.dmp
            Filesize

            84KB

          • memory/4680-44-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-47-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-45-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-48-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-49-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-50-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-51-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-52-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-54-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-55-0x00000000035E0000-0x00000000035E5000-memory.dmp
            Filesize

            20KB

          • memory/4680-53-0x00000000027E0000-0x00000000027F0000-memory.dmp
            Filesize

            64KB

          • memory/4680-58-0x00000000035E0000-0x00000000035E5000-memory.dmp
            Filesize

            20KB

          • memory/4680-59-0x0000000008140000-0x000000000854B000-memory.dmp
            Filesize

            4.0MB

          • memory/4680-62-0x0000000008140000-0x000000000854B000-memory.dmp
            Filesize

            4.0MB

          • memory/4680-63-0x00000000035F0000-0x00000000035F7000-memory.dmp
            Filesize

            28KB