Analysis

  • max time kernel
    148s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    14-12-2020 15:10

General

  • Target

    75c5cd21845d8d6b715fb5c86b58c5c7.exe

  • Size

    11.0MB

  • MD5

    75c5cd21845d8d6b715fb5c86b58c5c7

  • SHA1

    492058c37438a6b93fa3c033b0b94c62af4cf7a7

  • SHA256

    7d89ddfb70a2246032a1ed4b908f7311f2808e11299967f08af6c748d336010a

  • SHA512

    d48abfcfddc8ab60efd35296dab49d7f3bfad4cf11a79fd58ab0824fddbd2e6993bf2164ae70f145d69907090cc9c2b4bb6987c4942030031944fe73f5b0d7fe

Malware Config

Signatures

  • Tofsee

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

  • Windows security bypass 2 TTPs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
  • Sets service image path in registry 2 TTPs
  • Deletes itself 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe

    Sc.exe is a Windows utlilty to control services on the system.

  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\75c5cd21845d8d6b715fb5c86b58c5c7.exe
    "C:\Users\Admin\AppData\Local\Temp\75c5cd21845d8d6b715fb5c86b58c5c7.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1668
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qbbyrnwe\
      2⤵
        PID:1168
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pflefndm.exe" C:\Windows\SysWOW64\qbbyrnwe\
        2⤵
          PID:1368
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create qbbyrnwe binPath= "C:\Windows\SysWOW64\qbbyrnwe\pflefndm.exe /d\"C:\Users\Admin\AppData\Local\Temp\75c5cd21845d8d6b715fb5c86b58c5c7.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:316
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description qbbyrnwe "wifi internet conection"
            2⤵
              PID:1556
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start qbbyrnwe
              2⤵
                PID:892
              • 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⤵
                  PID:1512
              • C:\Windows\SysWOW64\qbbyrnwe\pflefndm.exe
                C:\Windows\SysWOW64\qbbyrnwe\pflefndm.exe /d"C:\Users\Admin\AppData\Local\Temp\75c5cd21845d8d6b715fb5c86b58c5c7.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:1088
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe
                  2⤵
                  • Deletes itself
                  PID:556

              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

              Replay Monitor

              Loading Replay Monitor...

              Downloads

              • C:\Users\Admin\AppData\Local\Temp\pflefndm.exe
                MD5

                25614d5e015ecc51284ed4f1884c4b50

                SHA1

                4fa844645aded26147f11203dab53b34cfefd282

                SHA256

                708a62dc5b180558d8addb0a708f19f8ba1cb5e75814ec7cd8cbf3ccca8e3481

                SHA512

                bc1786de64c6c81ddab19e03414925f59256556139c8d70c8a076e2370ab31e1639b3ee1f9fc02307d9b0060759a093c0bec1062744d630c836e92c346cd5cd5

              • C:\Windows\SysWOW64\qbbyrnwe\pflefndm.exe
                MD5

                25614d5e015ecc51284ed4f1884c4b50

                SHA1

                4fa844645aded26147f11203dab53b34cfefd282

                SHA256

                708a62dc5b180558d8addb0a708f19f8ba1cb5e75814ec7cd8cbf3ccca8e3481

                SHA512

                bc1786de64c6c81ddab19e03414925f59256556139c8d70c8a076e2370ab31e1639b3ee1f9fc02307d9b0060759a093c0bec1062744d630c836e92c346cd5cd5

              • memory/316-5-0x0000000000000000-mapping.dmp
              • memory/556-10-0x0000000000080000-0x0000000000095000-memory.dmp
                Filesize

                84KB

              • memory/556-11-0x0000000000089A6B-mapping.dmp
              • memory/556-12-0x0000000000080000-0x0000000000095000-memory.dmp
                Filesize

                84KB

              • memory/892-7-0x0000000000000000-mapping.dmp
              • memory/1168-2-0x0000000000000000-mapping.dmp
              • memory/1368-3-0x0000000000000000-mapping.dmp
              • memory/1512-8-0x0000000000000000-mapping.dmp
              • memory/1556-6-0x0000000000000000-mapping.dmp