Overview

overview

10

Static

static

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    19/12/2022, 22:54

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General

  • Target

    file.exe

  • Size

    304KB

  • MD5

    8990b4f21245d78cd1fcdbaf6f0561e1

  • SHA1

    de8c27206b12e2b165893cf83a73df2ec4c47b53

  • SHA256

    ad70e9386cbcff9534f6c3f2fc921f1f468f13e40c9b489cec17de81f0401de9

  • SHA512

    9034b6c1fa99482a37dbe915948f05ee431c8b07ffc20956d456fac70cc32fe2e8a39ae725e10d5653000a16da40a0d40dc948de9d19418993acd6c05d1a207a

  • SSDEEP

    3072:A7z8tLu+YG25MX5w/ip0cZxezBUZVMo7DVEmRkwxOP2d+77h+y65/1E3ZJyyjXgJ:CeLGBM+K4upEm2wdwJ63QZImQKG0

Score
10/10
tofseexmrigevasionminerpersistencetrojan

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.

    trojantofsee
  • Windows security bypass 2 TTPs 1 IoCs
    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 1 IoCs
    evasion
  • Sets service image path in registry 2 TTPs 1 IoCs
    persistence
  • 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 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:1456
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kraxwbwx\
      2⤵
        PID:1144
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kvrwngsh.exe" C:\Windows\SysWOW64\kraxwbwx\
        2⤵
          PID:1936
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create kraxwbwx binPath= "C:\Windows\SysWOW64\kraxwbwx\kvrwngsh.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:956
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description kraxwbwx "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1568
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start kraxwbwx
          2⤵
          • Launches sc.exe
          PID:1964
        • 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:580
      • C:\Windows\SysWOW64\kraxwbwx\kvrwngsh.exe
        C:\Windows\SysWOW64\kraxwbwx\kvrwngsh.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:520
        • 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:932
          • 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:1128

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        12.1MB

        MD5

        ef495d8ea9911bded48fc8f722b7acba

        SHA1

        3b4ed57b3df54a43ca7a9f547f1b53fde963a9a6

        SHA256

        73ac121eb3db573df8cb026d96707da0bd0b24893806ca6fa53035cde334d7cd

        SHA512

        e5c37ecdcb82d8342bbfdafd6437ebac7a81dbe9da8b289440d88281580213239429f8fa9791b4d5ada31db716292511d8ff474bd4a6022b4e45770eee068a8f

        Download Submit

      • C:\Windows\SysWOW64\kraxwbwx\kvrwngsh.exe
        Filesize

        12.1MB

        MD5

        ef495d8ea9911bded48fc8f722b7acba

        SHA1

        3b4ed57b3df54a43ca7a9f547f1b53fde963a9a6

        SHA256

        73ac121eb3db573df8cb026d96707da0bd0b24893806ca6fa53035cde334d7cd

        SHA512

        e5c37ecdcb82d8342bbfdafd6437ebac7a81dbe9da8b289440d88281580213239429f8fa9791b4d5ada31db716292511d8ff474bd4a6022b4e45770eee068a8f

        Download Submit

      • memory/520-78-0x0000000000400000-0x0000000000452000-memory.dmp

        Filesize

        328KB

        Download

      • memory/520-76-0x000000000050C000-0x0000000000521000-memory.dmp

        Filesize

        84KB

        Download

      • memory/932-83-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

        Download

      • memory/932-92-0x00000000054D0000-0x00000000058DB000-memory.dmp

        Filesize

        4.0MB

        Download

      • memory/932-107-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

        Download

      • memory/932-86-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

        Download

      • memory/932-80-0x0000000001A00000-0x0000000001C0F000-memory.dmp

        Filesize

        2.1MB

        Download

      • memory/932-79-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

        Download

      • memory/932-89-0x0000000000130000-0x0000000000135000-memory.dmp

        Filesize

        20KB

        Download

      • memory/932-95-0x00000000001C0000-0x00000000001C7000-memory.dmp

        Filesize

        28KB

        Download

      • memory/932-70-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

        Download

      • memory/932-72-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

        Download

      • memory/1128-98-0x00000000002A0000-0x0000000000391000-memory.dmp

        Filesize

        964KB

        Download

      • memory/1128-100-0x00000000002A0000-0x0000000000391000-memory.dmp

        Filesize

        964KB

        Download

      • memory/1456-66-0x000000000060C000-0x0000000000621000-memory.dmp

        Filesize

        84KB

        Download

      • memory/1456-54-0x00000000768A1000-0x00000000768A3000-memory.dmp

        Filesize

        8KB

        Download

      • memory/1456-55-0x000000000060C000-0x0000000000621000-memory.dmp

        Filesize

        84KB

        Download

      • memory/1456-56-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

        Download

      • memory/1456-67-0x0000000000400000-0x0000000000452000-memory.dmp

        Filesize

        328KB

        Download

      • memory/1456-57-0x0000000000400000-0x0000000000452000-memory.dmp

        Filesize

        328KB

        Download