Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2023 12:32

General

  • Target

    file.exe

  • Size

    213KB

  • MD5

    dac1f98021e82370657ca79d43940e9e

  • SHA1

    1d69c84299549560c1a46d085256a27d6a074621

  • SHA256

    209e78147c676b2562945d15e0637303f819bc8a2f0e34f5cfa8ba16137e85a5

  • SHA512

    56f829653430fffee2e9799902fd38bb726c28bdda5accd43e5c3b333ef2c909d7b9c865e8ba3041609bfc415b9283a9cf4d3888dd81b1091fae7b7cc53b5432

  • SSDEEP

    3072:HnCD27R5eVPDZg4lrEh+DsuNk0+LpzCJMZZmEo8ksJ5tMxqyI7iMPre:HRjeVPu4lrEh+Dsik0+RTDw9u/7iMT

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:1268
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oadhxus\
      2⤵
        PID:2020
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\orohyauk.exe" C:\Windows\SysWOW64\oadhxus\
        2⤵
          PID:1064
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create oadhxus binPath= "C:\Windows\SysWOW64\oadhxus\orohyauk.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:576
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description oadhxus "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1480
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start oadhxus
          2⤵
          • Launches sc.exe
          PID:1684
        • 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:1504
      • C:\Windows\SysWOW64\oadhxus\orohyauk.exe
        C:\Windows\SysWOW64\oadhxus\orohyauk.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1972
        • 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:632
          • 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:1388

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        10.7MB

        MD5

        1147daf292179ade1b457252c46e36d8

        SHA1

        a09c29e6fb66a36c671ba402148a86a49ead1778

        SHA256

        018c363cb2d27c42beeeb0934fe9751d5309978bd3331718fcf2afdba85f8048

        SHA512

        f324f2f2a878afcb832622950ffe76dc9f2a43196612c77e0288116fefe40f871f21e019a62135f69349bf061cdf542f605af7295464d1a713ef61c3a798a6de

      • C:\Windows\SysWOW64\oadhxus\orohyauk.exe
        Filesize

        10.7MB

        MD5

        1147daf292179ade1b457252c46e36d8

        SHA1

        a09c29e6fb66a36c671ba402148a86a49ead1778

        SHA256

        018c363cb2d27c42beeeb0934fe9751d5309978bd3331718fcf2afdba85f8048

        SHA512

        f324f2f2a878afcb832622950ffe76dc9f2a43196612c77e0288116fefe40f871f21e019a62135f69349bf061cdf542f605af7295464d1a713ef61c3a798a6de

      • memory/632-88-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/632-61-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/632-89-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-63-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/632-110-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/632-67-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/632-68-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/632-69-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/632-71-0x0000000001910000-0x0000000001B1F000-memory.dmp
        Filesize

        2.1MB

      • memory/632-106-0x0000000000320000-0x0000000000327000-memory.dmp
        Filesize

        28KB

      • memory/632-75-0x0000000000150000-0x0000000000156000-memory.dmp
        Filesize

        24KB

      • memory/632-90-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-81-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-82-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-83-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-84-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-85-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-86-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-87-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-74-0x0000000001910000-0x0000000001B1F000-memory.dmp
        Filesize

        2.1MB

      • memory/632-105-0x0000000005610000-0x0000000005A1B000-memory.dmp
        Filesize

        4.0MB

      • memory/632-78-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-91-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-93-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-92-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-94-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-95-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-96-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-97-0x0000000000160000-0x0000000000170000-memory.dmp
        Filesize

        64KB

      • memory/632-98-0x00000000002B0000-0x00000000002B5000-memory.dmp
        Filesize

        20KB

      • memory/632-101-0x00000000002B0000-0x00000000002B5000-memory.dmp
        Filesize

        20KB

      • memory/632-102-0x0000000005610000-0x0000000005A1B000-memory.dmp
        Filesize

        4.0MB

      • memory/1268-60-0x0000000000400000-0x00000000004A2000-memory.dmp
        Filesize

        648KB

      • memory/1268-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/1388-111-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/1388-112-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/1388-121-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/1388-120-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/1388-119-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/1388-122-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/1388-123-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/1388-124-0x00000000000C0000-0x00000000001B1000-memory.dmp
        Filesize

        964KB

      • memory/1972-64-0x0000000000400000-0x00000000004A2000-memory.dmp
        Filesize

        648KB