Analysis

  • max time kernel
    145s
  • max time network
    163s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 13:33

General

  • Target

    8960100ed18988a177edb0c6825ebe9319cc350c344ce7ce40df4a9d50c44e6f.exe

  • Size

    228KB

  • MD5

    62abaf2cde2460be94b6fc5d5917cf14

  • SHA1

    ef808492171ea4fcc8b85a6ec553544ebff2dc26

  • SHA256

    8960100ed18988a177edb0c6825ebe9319cc350c344ce7ce40df4a9d50c44e6f

  • SHA512

    fb511c078edb9971c8c7c073441f6ef0d1fededa093d7991f6e54c40e7c9144e67c45dbbdec22b5ff93111846f687fcb22456c4b2c03b7b01b3858eaab1792c7

  • SSDEEP

    3072:7VpLtaCoeUUb4Ji0/7t+/KFQbMdLY8aXIbHQSLkJl4C6FD81OL6OwR2Rsb4Mf7U0:JpLt3/bc/taYtLkqKLOOX7

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 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).

  • Modifies data under HKEY_USERS 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8960100ed18988a177edb0c6825ebe9319cc350c344ce7ce40df4a9d50c44e6f.exe
    "C:\Users\Admin\AppData\Local\Temp\8960100ed18988a177edb0c6825ebe9319cc350c344ce7ce40df4a9d50c44e6f.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1048
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ykgwprox\
      2⤵
        PID:2956
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wqvtoroq.exe" C:\Windows\SysWOW64\ykgwprox\
        2⤵
          PID:2068
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ykgwprox binPath= "C:\Windows\SysWOW64\ykgwprox\wqvtoroq.exe /d\"C:\Users\Admin\AppData\Local\Temp\8960100ed18988a177edb0c6825ebe9319cc350c344ce7ce40df4a9d50c44e6f.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2616
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ykgwprox "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2424
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ykgwprox
          2⤵
          • Launches sc.exe
          PID:1944
        • 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:2640
      • C:\Windows\SysWOW64\ykgwprox\wqvtoroq.exe
        C:\Windows\SysWOW64\ykgwprox\wqvtoroq.exe /d"C:\Users\Admin\AppData\Local\Temp\8960100ed18988a177edb0c6825ebe9319cc350c344ce7ce40df4a9d50c44e6f.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2592
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2464

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Persistence

      Create or Modify System Process

      2
      T1543

      Windows Service

      2
      T1543.003

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Privilege Escalation

      Create or Modify System Process

      2
      T1543

      Windows Service

      2
      T1543.003

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Defense Evasion

      Impair Defenses

      2
      T1562

      Disable or Modify Tools

      1
      T1562.001

      Disable or Modify System Firewall

      1
      T1562.004

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        10.0MB

        MD5

        83c20956f6be3f45c26f4f77f21849c8

        SHA1

        71c2d7d3ee2f2a709b36b00a0b944307bf8b38e6

        SHA256

        0c453646adda2bd9161fdd7238e847a5618b2e46d5cc279b767ac568c99e8783

        SHA512

        a71d879e3198c635b3897c6297b681c206e682c426ce3f5de39942531afdd2fafaba155e190da2fb8508f5c17ee2e715a11ae0bbd37e37c5445ed283ebde5c3e

      • memory/1048-1-0x0000000000250000-0x0000000000350000-memory.dmp
        Filesize

        1024KB

      • memory/1048-2-0x00000000003C0000-0x00000000003D3000-memory.dmp
        Filesize

        76KB

      • memory/1048-3-0x0000000000400000-0x000000000043F000-memory.dmp
        Filesize

        252KB

      • memory/1048-6-0x0000000000400000-0x000000000043F000-memory.dmp
        Filesize

        252KB

      • memory/1048-7-0x00000000003C0000-0x00000000003D3000-memory.dmp
        Filesize

        76KB

      • memory/2464-35-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-38-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-12-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2464-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2464-15-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2464-59-0x0000000000200000-0x0000000000207000-memory.dmp
        Filesize

        28KB

      • memory/2464-20-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2464-21-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2464-22-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2464-24-0x0000000001C80000-0x0000000001E8F000-memory.dmp
        Filesize

        2.1MB

      • memory/2464-28-0x0000000000110000-0x0000000000116000-memory.dmp
        Filesize

        24KB

      • memory/2464-27-0x0000000001C80000-0x0000000001E8F000-memory.dmp
        Filesize

        2.1MB

      • memory/2464-31-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-34-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-58-0x0000000005910000-0x0000000005D1B000-memory.dmp
        Filesize

        4.0MB

      • memory/2464-36-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-37-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-55-0x0000000005910000-0x0000000005D1B000-memory.dmp
        Filesize

        4.0MB

      • memory/2464-39-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-40-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-41-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-42-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-43-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-44-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-45-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-46-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-47-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-48-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-49-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-50-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2464-51-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/2464-54-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/2592-11-0x0000000000400000-0x000000000043F000-memory.dmp
        Filesize

        252KB

      • memory/2592-10-0x0000000000590000-0x0000000000690000-memory.dmp
        Filesize

        1024KB

      • memory/2592-18-0x0000000000400000-0x000000000043F000-memory.dmp
        Filesize

        252KB