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Overview

overview

10

Static

static

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/12/2022, 00:46

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General

  • Target

    file.exe

  • Size

    215KB

  • MD5

    cf288041eb39475dbd6cd227c263fc0e

  • SHA1

    fd4d23c2f6f6ebe0a7c14388e6edac232ba6b402

  • SHA256

    55a54a659c8184d1f2649593c5905e43f21750d96a7fa97a1f6a8a6e11cf9253

  • SHA512

    e1efa58c1276e5e9334deda1e534c881e62aded89e64a94e9b5552e9754dd3558c3555148a1b3c89db2cd87093163afb166bd08cdbd0b122f3f7e03c93b527c7

  • SSDEEP

    6144:0V/VLXz3lgJiE+z1GOTA9VKy70JVejcbXF:0VNzzlgd21G6Mgi0J4YbXF

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
  • Executes dropped EXE 1 IoCs
  • 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.

  • 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:1524
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\luyfvhtb\
      2⤵
        PID:2444
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gwcjoaet.exe" C:\Windows\SysWOW64\luyfvhtb\
        2⤵
          PID:4124
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create luyfvhtb binPath= "C:\Windows\SysWOW64\luyfvhtb\gwcjoaet.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4196
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description luyfvhtb "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4544
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start luyfvhtb
          2⤵
          • Launches sc.exe
          PID:4128
        • 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:1612
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1524 -s 1036
          2⤵
          • Program crash
          PID:260
      • C:\Windows\SysWOW64\luyfvhtb\gwcjoaet.exe
        C:\Windows\SysWOW64\luyfvhtb\gwcjoaet.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2760
        • 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:2416
          • 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:4532
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2760 -s 528
          2⤵
          • Program crash
          PID:4588
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1524 -ip 1524
        1⤵
          PID:2668
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2760 -ip 2760
          1⤵
            PID:4584

          Network

          MITRE ATT&CK Enterprise v6

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          Downloads

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

            11.8MB

            MD5

            e7a3da9a5350861a75d6dd88773f1fd4

            SHA1

            7c3ffca8d2c4d263130fc0a36107ae251937a18e

            SHA256

            889679ed083b371e86330e8f2bde711b7d2e470e2394f2f91fa5accf26872be7

            SHA512

            7a360286345a1e0fbd3a0b4b577d161749021af1c064ba8ec1481ce9101db944f0e8446f6e667997b21ddbd94db2f9f9f095d4ab3f1910a3737445056d05db54

            Download Submit

          • C:\Windows\SysWOW64\luyfvhtb\gwcjoaet.exe
            Filesize

            11.8MB

            MD5

            e7a3da9a5350861a75d6dd88773f1fd4

            SHA1

            7c3ffca8d2c4d263130fc0a36107ae251937a18e

            SHA256

            889679ed083b371e86330e8f2bde711b7d2e470e2394f2f91fa5accf26872be7

            SHA512

            7a360286345a1e0fbd3a0b4b577d161749021af1c064ba8ec1481ce9101db944f0e8446f6e667997b21ddbd94db2f9f9f095d4ab3f1910a3737445056d05db54

            Download Submit

          • memory/1524-133-0x00000000007B9000-0x00000000007CA000-memory.dmp

            Filesize

            68KB

            Download

          • memory/1524-134-0x00000000006F0000-0x0000000000703000-memory.dmp

            Filesize

            76KB

            Download

          • memory/1524-135-0x0000000000400000-0x000000000045D000-memory.dmp

            Filesize

            372KB

            Download

          • memory/1524-144-0x0000000000400000-0x000000000045D000-memory.dmp

            Filesize

            372KB

            Download

          • memory/1524-143-0x00000000007B9000-0x00000000007CA000-memory.dmp

            Filesize

            68KB

            Download

          • memory/2416-159-0x0000000001FC0000-0x0000000001FD0000-memory.dmp

            Filesize

            64KB

            Download

          • memory/2416-151-0x0000000000940000-0x0000000000955000-memory.dmp

            Filesize

            84KB

            Download

          • memory/2416-168-0x0000000002BD0000-0x0000000002BD7000-memory.dmp

            Filesize

            28KB

            Download

          • memory/2416-165-0x0000000007840000-0x0000000007C4B000-memory.dmp

            Filesize

            4.0MB

            Download

          • memory/2416-162-0x0000000001FF0000-0x0000000001FF5000-memory.dmp

            Filesize

            20KB

            Download

          • memory/2416-146-0x0000000000940000-0x0000000000955000-memory.dmp

            Filesize

            84KB

            Download

          • memory/2416-156-0x0000000001FB0000-0x0000000001FB6000-memory.dmp

            Filesize

            24KB

            Download

          • memory/2416-153-0x0000000002800000-0x0000000002A0F000-memory.dmp

            Filesize

            2.1MB

            Download

          • memory/2416-152-0x0000000000940000-0x0000000000955000-memory.dmp

            Filesize

            84KB

            Download

          • memory/2760-150-0x0000000000400000-0x000000000045D000-memory.dmp

            Filesize

            372KB

            Download

          • memory/2760-149-0x0000000000523000-0x0000000000534000-memory.dmp

            Filesize

            68KB

            Download

          • memory/4532-172-0x0000000000680000-0x0000000000771000-memory.dmp

            Filesize

            964KB

            Download

          • memory/4532-177-0x0000000000680000-0x0000000000771000-memory.dmp

            Filesize

            964KB

            Download