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Analysis

  • max time kernel
    146s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    01/10/2022, 20:50

General

  • Target

    b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe

  • Size

    120KB

  • MD5

    4dceae07630380b5ed1a94389e1fb9c0

  • SHA1

    2d3bd982d62d7fc62b961f82625682231766856e

  • SHA256

    b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97

  • SHA512

    4fb8b0a3cbeb394453c551e6daece1cf5c1685abf2d6b083d569c4096a3544c228df7bba7acfdec3aae9caa490f04dd78ca08a53cf6a6108f415a0d5a767e254

  • SSDEEP

    1536:mZG0MaQ9u20DPpbuF30kpX9aIJeOX/hZZYF9WqoMurUE/ZZ1rSNJMiGXBe:Nr9u20Tpb+rpAyZZKF9WqJEz1+8dx

Malware Config

Extracted

Family

tofsee

C2

111.121.193.238

103.15.107.117

188.190.114.108

188.165.132.183

213.155.0.208

rgtryhbgddtyh.biz

wertdghbyrukl.ch

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Executes dropped EXE 2 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 34 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe
    "C:\Users\Admin\AppData\Local\Temp\b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1168
    • C:\Users\Admin\AppData\Local\Temp\b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe
      "C:\Users\Admin\AppData\Local\Temp\b62bd16f3b2fb0e9d1549dd12114b99bdfd360a8a9719f9b801544113c69bb97.exe"
      2⤵
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:1640
      • C:\Users\Admin\eennasbz.exe
        "C:\Users\Admin\eennasbz.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1164
        • C:\Users\Admin\eennasbz.exe
          "C:\Users\Admin\eennasbz.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:1708
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe
            5⤵
              PID:1680
        • C:\Windows\SysWOW64\cmd.exe
          cmd /c ""C:\Users\Admin\AppData\Local\Temp\4011.bat" "
          3⤵
          • Deletes itself
          PID:432

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\4011.bat

      Filesize

      302B

      MD5

      82f2f155771c7c4904c12c23cca7ea40

      SHA1

      822563caf201e35906c67abb8c319d3f1b9d3b59

      SHA256

      13e29eb85af8de8b174f5b8ab10165cfd73c24c5c8998c0c04edec2dd4af8531

      SHA512

      3ef45fe3747c6558140e2da0bef868bb65fe775ddb98dd6605b5f5bac5eb4acb6410b011eaac209404db76d38dc7142dcac1c89641c19a6f5a589e8f92576d0a

    • C:\Users\Admin\eennasbz.exe

      Filesize

      43.7MB

      MD5

      f9f824bb16b542fdbe708fef74022151

      SHA1

      084df0a16cde9087adeec22795772834f8cffbe9

      SHA256

      0b55681423b1ca0fec490a4f73030e40d936ceb16782b16f6113991529371f19

      SHA512

      df60e5b4685053b9680e2d715409218860f9b5e78bf8f35654e3dbc71e8072ade6b9b3b71cd1b31c5f782fa998a4af9e487786bba7d604fce4aa93feddc7b923

    • C:\Users\Admin\eennasbz.exe

      Filesize

      43.7MB

      MD5

      f9f824bb16b542fdbe708fef74022151

      SHA1

      084df0a16cde9087adeec22795772834f8cffbe9

      SHA256

      0b55681423b1ca0fec490a4f73030e40d936ceb16782b16f6113991529371f19

      SHA512

      df60e5b4685053b9680e2d715409218860f9b5e78bf8f35654e3dbc71e8072ade6b9b3b71cd1b31c5f782fa998a4af9e487786bba7d604fce4aa93feddc7b923

    • C:\Users\Admin\eennasbz.exe

      Filesize

      43.7MB

      MD5

      f9f824bb16b542fdbe708fef74022151

      SHA1

      084df0a16cde9087adeec22795772834f8cffbe9

      SHA256

      0b55681423b1ca0fec490a4f73030e40d936ceb16782b16f6113991529371f19

      SHA512

      df60e5b4685053b9680e2d715409218860f9b5e78bf8f35654e3dbc71e8072ade6b9b3b71cd1b31c5f782fa998a4af9e487786bba7d604fce4aa93feddc7b923

    • \Users\Admin\eennasbz.exe

      Filesize

      43.7MB

      MD5

      f9f824bb16b542fdbe708fef74022151

      SHA1

      084df0a16cde9087adeec22795772834f8cffbe9

      SHA256

      0b55681423b1ca0fec490a4f73030e40d936ceb16782b16f6113991529371f19

      SHA512

      df60e5b4685053b9680e2d715409218860f9b5e78bf8f35654e3dbc71e8072ade6b9b3b71cd1b31c5f782fa998a4af9e487786bba7d604fce4aa93feddc7b923

    • \Users\Admin\eennasbz.exe

      Filesize

      43.7MB

      MD5

      f9f824bb16b542fdbe708fef74022151

      SHA1

      084df0a16cde9087adeec22795772834f8cffbe9

      SHA256

      0b55681423b1ca0fec490a4f73030e40d936ceb16782b16f6113991529371f19

      SHA512

      df60e5b4685053b9680e2d715409218860f9b5e78bf8f35654e3dbc71e8072ade6b9b3b71cd1b31c5f782fa998a4af9e487786bba7d604fce4aa93feddc7b923

    • memory/1640-69-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/1640-56-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/1640-60-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/1640-59-0x00000000760E1000-0x00000000760E3000-memory.dmp

      Filesize

      8KB

    • memory/1640-61-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/1680-81-0x00000000000C0000-0x00000000000D2000-memory.dmp

      Filesize

      72KB

    • memory/1680-79-0x00000000000C0000-0x00000000000D2000-memory.dmp

      Filesize

      72KB

    • memory/1680-87-0x00000000000C0000-0x00000000000D2000-memory.dmp

      Filesize

      72KB

    • memory/1680-88-0x00000000000C0000-0x00000000000D2000-memory.dmp

      Filesize

      72KB

    • memory/1708-77-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/1708-78-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/1708-84-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB