Overview

overview

10

Static

static

33dbfe82ab...4e.exe

windows7-x64

10

33dbfe82ab...4e.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    174s
  • max time network
    194s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-12-2022 06:50

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General

  • Target

    33dbfe82ab8f840bc7de23a02d6c7c08e98ca5e21d9bf1e53499baf3c3a1394e.exe

  • Size

    184KB

  • MD5

    edbbbe07f8126eead83d073a73ab0da2

  • SHA1

    760c5e661efcfac013e0147263f80c2f2bf8be38

  • SHA256

    33dbfe82ab8f840bc7de23a02d6c7c08e98ca5e21d9bf1e53499baf3c3a1394e

  • SHA512

    fefe77cd0cdfc3952534bff4600758495c383bad07fa8415cbbd27a13fa1be7c915dcf505580a5b69ef5304335aadaf8c2573782fde154f152c8a0a2d688270d

  • SSDEEP

    3072:j3BMNdO3Do5EvQW5KicTuIFhNZbPdRFZw/mW8Kewj:1Mio5EGBuIFhNZbV5JKt

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Signatures

  • Tofsee

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

    trojantofsee
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

    minerxmrig
  • XMRig Miner payload 2 IoCs
    miner
  • Creates new service(s) 1 TTPs
    persistence
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 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.

  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 2 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). Likely ransomware behaviour.

  • Modifies data under HKEY_USERS 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\33dbfe82ab8f840bc7de23a02d6c7c08e98ca5e21d9bf1e53499baf3c3a1394e.exe
    "C:\Users\Admin\AppData\Local\Temp\33dbfe82ab8f840bc7de23a02d6c7c08e98ca5e21d9bf1e53499baf3c3a1394e.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3808
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jhmbqvfy\
      2⤵
        PID:2720
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dokpgzla.exe" C:\Windows\SysWOW64\jhmbqvfy\
        2⤵
          PID:3768
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jhmbqvfy binPath= "C:\Windows\SysWOW64\jhmbqvfy\dokpgzla.exe /d\"C:\Users\Admin\AppData\Local\Temp\33dbfe82ab8f840bc7de23a02d6c7c08e98ca5e21d9bf1e53499baf3c3a1394e.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:5052
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description jhmbqvfy "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1676
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start jhmbqvfy
          2⤵
          • Launches sc.exe
          PID:2512
        • 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:2836
      • C:\Windows\SysWOW64\jhmbqvfy\dokpgzla.exe
        C:\Windows\SysWOW64\jhmbqvfy\dokpgzla.exe /d"C:\Users\Admin\AppData\Local\Temp\33dbfe82ab8f840bc7de23a02d6c7c08e98ca5e21d9bf1e53499baf3c3a1394e.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3436
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:2156
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:4352

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Initial Access

      Execution

      Persistence

      New Service

      1
      T1050

      Modify Existing Service

      1
      T1031

      Registry Run Keys / Startup Folder

      1
      T1060

      Privilege Escalation

      New Service

      1
      T1050

      Defense Evasion

      Modify Registry

      1
      T1112

      Credential Access

      Discovery

      Query Registry

      1
      T1012

      System Information Discovery

      2
      T1082

      Lateral Movement

      Collection

      Exfiltration

      Command and Control

      Impact

      Replay Monitor

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      Downloads

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

        13.0MB

        MD5

        a98aac5d29ae6ea119413402c6001f0c

        SHA1

        38d381e5bd1602264e826d64342f7e2da5dc0eba

        SHA256

        b436c24df5baa1324f1a835ede51909adcddc15b87cc5ccad7c6ecb0419397b3

        SHA512

        4329de2c410243cb21a6b93415adb36aa84763d8c18acbf0cb623dadcfa1caab4cbae0d45cf5c07b1b180e37648782e472b7837c7d61712557c47ad34790c231

        Download Submit
      • C:\Windows\SysWOW64\jhmbqvfy\dokpgzla.exe
        Filesize

        13.0MB

        MD5

        a98aac5d29ae6ea119413402c6001f0c

        SHA1

        38d381e5bd1602264e826d64342f7e2da5dc0eba

        SHA256

        b436c24df5baa1324f1a835ede51909adcddc15b87cc5ccad7c6ecb0419397b3

        SHA512

        4329de2c410243cb21a6b93415adb36aa84763d8c18acbf0cb623dadcfa1caab4cbae0d45cf5c07b1b180e37648782e472b7837c7d61712557c47ad34790c231

        Download Submit
      • memory/1676-141-0x0000000000000000-mapping.dmp
        Download
      • memory/2156-155-0x0000000002800000-0x0000000002A0F000-memory.dmp
        Filesize

        2.1MB

        Download
      • memory/2156-158-0x0000000001DB0000-0x0000000001DB6000-memory.dmp
        Filesize

        24KB

        Download
      • memory/2156-170-0x0000000001DE0000-0x0000000001DE7000-memory.dmp
        Filesize

        28KB

        Download
      • memory/2156-167-0x0000000007800000-0x0000000007C0B000-memory.dmp
        Filesize

        4.0MB

        Download
      • memory/2156-164-0x0000000001DD0000-0x0000000001DD5000-memory.dmp
        Filesize

        20KB

        Download
      • memory/2156-161-0x0000000001DC0000-0x0000000001DD0000-memory.dmp
        Filesize

        64KB

        Download
      • memory/2156-154-0x00000000007B0000-0x00000000007C5000-memory.dmp
        Filesize

        84KB

        Download
      • memory/2156-153-0x00000000007B0000-0x00000000007C5000-memory.dmp
        Filesize

        84KB

        Download
      • memory/2156-148-0x00000000007B0000-0x00000000007C5000-memory.dmp
        Filesize

        84KB

        Download
      • memory/2156-147-0x0000000000000000-mapping.dmp
        Download
      • memory/2512-142-0x0000000000000000-mapping.dmp
        Download
      • memory/2720-135-0x0000000000000000-mapping.dmp
        Download
      • memory/2836-144-0x0000000000000000-mapping.dmp
        Download
      • memory/3436-151-0x00000000006E9000-0x00000000006F9000-memory.dmp
        Filesize

        64KB

        Download
      • memory/3436-152-0x0000000000400000-0x0000000000464000-memory.dmp
        Filesize

        400KB

        Download
      • memory/3768-136-0x0000000000000000-mapping.dmp
        Download
      • memory/3808-132-0x00000000004DD000-0x00000000004EE000-memory.dmp
        Filesize

        68KB

        Download
      • memory/3808-134-0x0000000000400000-0x0000000000464000-memory.dmp
        Filesize

        400KB

        Download
      • memory/3808-146-0x0000000000400000-0x0000000000464000-memory.dmp
        Filesize

        400KB

        Download
      • memory/3808-133-0x00000000004A0000-0x00000000004B3000-memory.dmp
        Filesize

        76KB

        Download
      • memory/3808-145-0x00000000004DD000-0x00000000004EE000-memory.dmp
        Filesize

        68KB

        Download
      • memory/3808-139-0x00000000004A0000-0x00000000004B3000-memory.dmp
        Filesize

        76KB

        Download
      • memory/3808-138-0x00000000004DD000-0x00000000004EE000-memory.dmp
        Filesize

        68KB

        Download
      • memory/4352-173-0x0000000000000000-mapping.dmp
        Download
      • memory/4352-174-0x0000000000400000-0x00000000004F1000-memory.dmp
        Filesize

        964KB

        Download
      • memory/4352-179-0x0000000000400000-0x00000000004F1000-memory.dmp
        Filesize

        964KB

        Download
      • memory/5052-140-0x0000000000000000-mapping.dmp
        Download