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Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/04/2023, 05:06

General

  • Target

    file.exe

  • Size

    196KB

  • MD5

    c0e61d01289f3a5a54e54f53f05e669e

  • SHA1

    086df3e7728832745a0179c6a3368caddc6a5820

  • SHA256

    d0db1c583a923cc68693c9299997c8fe784295017d7d6e01a12dd8818bdf1ed8

  • SHA512

    5cf481318a2b75ced7108a5cfc52924b039e6e3a27e82ad0f916de59d3faf7b1ea2760457fbaa3bbece174cc5f6b384d4469ded279bc8bab2ad46cc6188a0928

  • SSDEEP

    3072:4w28CrrrZi8q+8Wxmftll6Y1Fj1Iy0b/cUNvA9Nmi2hgSp:b28Ada90mftl0Y1HkUSAKRZ

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

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 8 IoCs
  • Creates new service(s) 1 TTPs
  • 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.

  • 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.

  • 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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2804
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vtohwhmp\
      2⤵
        PID:220
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tiahmkph.exe" C:\Windows\SysWOW64\vtohwhmp\
        2⤵
          PID:2540
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vtohwhmp binPath= "C:\Windows\SysWOW64\vtohwhmp\tiahmkph.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3768
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vtohwhmp "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4796
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vtohwhmp
          2⤵
          • Launches sc.exe
          PID:4304
        • 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:1588
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2804 -s 668
          2⤵
          • Program crash
          PID:4088
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2804 -ip 2804
        1⤵
          PID:3484
        • C:\Windows\SysWOW64\vtohwhmp\tiahmkph.exe
          C:\Windows\SysWOW64\vtohwhmp\tiahmkph.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:1652
          • 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:4108
            • 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:1512
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 1652 -s 512
            2⤵
            • Program crash
            PID:3172
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1652 -ip 1652
          1⤵
            PID:3764

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            14.8MB

            MD5

            87d69045950b8d6ccc9adab9b1547be5

            SHA1

            514266d560b648992be36455dd3eaf63b9484792

            SHA256

            e9a800bfe67e73b618322c3f3f3a888ca010ca1cb834e9b859f093f4db0a3359

            SHA512

            651dd54a7920311f15b75cff77a423792ee2e57f4bf7bf6a02b387d5dfa02a965a37217492423741bc8d4f09e94500c24a81b4bd052552afa1f16f1f12284d6b

          • C:\Windows\SysWOW64\vtohwhmp\tiahmkph.exe

            Filesize

            14.8MB

            MD5

            87d69045950b8d6ccc9adab9b1547be5

            SHA1

            514266d560b648992be36455dd3eaf63b9484792

            SHA256

            e9a800bfe67e73b618322c3f3f3a888ca010ca1cb834e9b859f093f4db0a3359

            SHA512

            651dd54a7920311f15b75cff77a423792ee2e57f4bf7bf6a02b387d5dfa02a965a37217492423741bc8d4f09e94500c24a81b4bd052552afa1f16f1f12284d6b

          • memory/1512-194-0x0000000000400000-0x00000000004F1000-memory.dmp

            Filesize

            964KB

          • memory/1512-188-0x0000000000400000-0x00000000004F1000-memory.dmp

            Filesize

            964KB

          • memory/1512-199-0x0000000000400000-0x00000000004F1000-memory.dmp

            Filesize

            964KB

          • memory/1512-198-0x0000000000400000-0x00000000004F1000-memory.dmp

            Filesize

            964KB

          • memory/1512-193-0x0000000000400000-0x00000000004F1000-memory.dmp

            Filesize

            964KB

          • memory/1512-197-0x0000000000400000-0x00000000004F1000-memory.dmp

            Filesize

            964KB

          • memory/1512-196-0x0000000000400000-0x00000000004F1000-memory.dmp

            Filesize

            964KB

          • memory/1512-195-0x0000000000400000-0x00000000004F1000-memory.dmp

            Filesize

            964KB

          • memory/1652-144-0x0000000000400000-0x00000000004A0000-memory.dmp

            Filesize

            640KB

          • memory/2804-135-0x00000000021D0000-0x00000000021E3000-memory.dmp

            Filesize

            76KB

          • memory/2804-139-0x0000000000400000-0x00000000004A0000-memory.dmp

            Filesize

            640KB

          • memory/4108-167-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-171-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-161-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-162-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-163-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-159-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-164-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-165-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-166-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-156-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-168-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-169-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-170-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-172-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-174-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-160-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-175-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-173-0x0000000000EF0000-0x0000000000F00000-memory.dmp

            Filesize

            64KB

          • memory/4108-176-0x0000000000F00000-0x0000000000F05000-memory.dmp

            Filesize

            20KB

          • memory/4108-179-0x0000000000F00000-0x0000000000F05000-memory.dmp

            Filesize

            20KB

          • memory/4108-180-0x0000000007440000-0x000000000784B000-memory.dmp

            Filesize

            4.0MB

          • memory/4108-183-0x0000000007440000-0x000000000784B000-memory.dmp

            Filesize

            4.0MB

          • memory/4108-184-0x0000000001BD0000-0x0000000001BD7000-memory.dmp

            Filesize

            28KB

          • memory/4108-153-0x0000000000EE0000-0x0000000000EE6000-memory.dmp

            Filesize

            24KB

          • memory/4108-152-0x0000000000CD0000-0x0000000000EDF000-memory.dmp

            Filesize

            2.1MB

          • memory/4108-149-0x0000000000CD0000-0x0000000000EDF000-memory.dmp

            Filesize

            2.1MB

          • memory/4108-147-0x0000000000570000-0x0000000000585000-memory.dmp

            Filesize

            84KB

          • memory/4108-146-0x0000000000570000-0x0000000000585000-memory.dmp

            Filesize

            84KB

          • memory/4108-145-0x0000000000570000-0x0000000000585000-memory.dmp

            Filesize

            84KB

          • memory/4108-143-0x0000000000570000-0x0000000000585000-memory.dmp

            Filesize

            84KB

          • memory/4108-140-0x0000000000570000-0x0000000000585000-memory.dmp

            Filesize

            84KB