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Overview

overview

10

Static

static

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/12/2022, 00:50

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General

  • Target

    file.exe

  • Size

    304KB

  • MD5

    28ed64d08b23133f1bb4262b3f12207f

  • SHA1

    733414e08c1177250ad6b7c5efd0c98d67fa432f

  • SHA256

    8c10f61f52638d29875ff12435258e8f9a3a692727eeb479f1a113f42d9fca0b

  • SHA512

    533cc0241a9101c19d62d25ee690b90fc4425962cee65598fce9492abc81c40912293e13518e045fd6807081010dd912b9670f4ce8e7b3e855594560832d758e

  • SSDEEP

    6144:I/L9CEzLMwVvKbQf/mfZdXFGfqN4/63QZImQKG0:2pCEx+QWffFDbQZW

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:2088
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kfmkaxyf\
      2⤵
        PID:1152
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kdaizsmj.exe" C:\Windows\SysWOW64\kfmkaxyf\
        2⤵
          PID:224
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create kfmkaxyf binPath= "C:\Windows\SysWOW64\kfmkaxyf\kdaizsmj.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3040
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description kfmkaxyf "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4184
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start kfmkaxyf
          2⤵
          • Launches sc.exe
          PID:4364
        • 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:620
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2088 -s 888
          2⤵
          • Program crash
          PID:5080
      • C:\Windows\SysWOW64\kfmkaxyf\kdaizsmj.exe
        C:\Windows\SysWOW64\kfmkaxyf\kdaizsmj.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4944
        • 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:1696
          • 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:3628
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4944 -s 524
          2⤵
          • Program crash
          PID:2388
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 2088 -ip 2088
        1⤵
          PID:900
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 4944 -ip 4944
          1⤵
            PID:1648

          Network

          MITRE ATT&CK Enterprise v6

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          Downloads

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

            11.3MB

            MD5

            4aba9fe6f7992cfefa053f2b2ff05477

            SHA1

            5ffc948d4af8579fff1dd664e5636c6dff908a72

            SHA256

            015090273251bb714f0f5b163ca2afa694d4a5f4081f02e6e4ac94da9968bb0a

            SHA512

            f2d8acea011300bda4bdfb9a61d5f97a9ad04139973ccf13de4c9dfdc122f8faf455f7d3c3239499ffa98f53b04188179c5f5f7245999de301461e0f00e697d4

            Download Submit

          • C:\Windows\SysWOW64\kfmkaxyf\kdaizsmj.exe
            Filesize

            11.3MB

            MD5

            4aba9fe6f7992cfefa053f2b2ff05477

            SHA1

            5ffc948d4af8579fff1dd664e5636c6dff908a72

            SHA256

            015090273251bb714f0f5b163ca2afa694d4a5f4081f02e6e4ac94da9968bb0a

            SHA512

            f2d8acea011300bda4bdfb9a61d5f97a9ad04139973ccf13de4c9dfdc122f8faf455f7d3c3239499ffa98f53b04188179c5f5f7245999de301461e0f00e697d4

            Download Submit

          • memory/1696-159-0x00000000007F0000-0x0000000000800000-memory.dmp

            Filesize

            64KB

            Download

          • memory/1696-151-0x00000000004C0000-0x00000000004D5000-memory.dmp

            Filesize

            84KB

            Download

          • memory/1696-168-0x00000000019F0000-0x00000000019F7000-memory.dmp

            Filesize

            28KB

            Download

          • memory/1696-165-0x0000000007080000-0x000000000748B000-memory.dmp

            Filesize

            4.0MB

            Download

          • memory/1696-162-0x00000000019E0000-0x00000000019E5000-memory.dmp

            Filesize

            20KB

            Download

          • memory/1696-156-0x00000000007E0000-0x00000000007E6000-memory.dmp

            Filesize

            24KB

            Download

          • memory/1696-153-0x0000000002200000-0x000000000240F000-memory.dmp

            Filesize

            2.1MB

            Download

          • memory/1696-152-0x00000000004C0000-0x00000000004D5000-memory.dmp

            Filesize

            84KB

            Download

          • memory/1696-146-0x00000000004C0000-0x00000000004D5000-memory.dmp

            Filesize

            84KB

            Download

          • memory/2088-134-0x0000000000400000-0x0000000000452000-memory.dmp

            Filesize

            328KB

            Download

          • memory/2088-143-0x00000000006C9000-0x00000000006DF000-memory.dmp

            Filesize

            88KB

            Download

          • memory/2088-144-0x0000000000400000-0x0000000000452000-memory.dmp

            Filesize

            328KB

            Download

          • memory/2088-133-0x0000000002050000-0x0000000002063000-memory.dmp

            Filesize

            76KB

            Download

          • memory/2088-132-0x00000000006C9000-0x00000000006DF000-memory.dmp

            Filesize

            88KB

            Download

          • memory/3628-172-0x0000000000E10000-0x0000000000F01000-memory.dmp

            Filesize

            964KB

            Download

          • memory/3628-177-0x0000000000E10000-0x0000000000F01000-memory.dmp

            Filesize

            964KB

            Download

          • memory/4944-150-0x0000000000400000-0x0000000000452000-memory.dmp

            Filesize

            328KB

            Download

          • memory/4944-149-0x0000000000595000-0x00000000005AA000-memory.dmp

            Filesize

            84KB

            Download