Analysis

  • max time kernel
    146s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    12-05-2023 20:24

General

  • Target

    0967dfa48bd1d2d0e282f762e9be80315cc6ea75b6e1b34d73f066c47ab46612.exe

  • Size

    318KB

  • MD5

    b101be318ab44ddbbabf025ef02e9a29

  • SHA1

    0e3d67a5c6f97f6f1d23a9540336b3ded4eaa13f

  • SHA256

    0967dfa48bd1d2d0e282f762e9be80315cc6ea75b6e1b34d73f066c47ab46612

  • SHA512

    79533d9d92770221a5631f942d48f893ec5cf0d3c8af899465b2cc4b4b92da5c3787cc65425c34d026fcb646b08348dd68ec14a3c9f56cdd914591594f8aa001

  • SSDEEP

    3072:TpXtNfDL3hmn5585BYMpYEvLDWPS5Z2wg3z2zxBUb5EpMYNY0lKRfeJ:RnLL3h45VMpYi2czjlpxPcQJ

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\0967dfa48bd1d2d0e282f762e9be80315cc6ea75b6e1b34d73f066c47ab46612.exe
    "C:\Users\Admin\AppData\Local\Temp\0967dfa48bd1d2d0e282f762e9be80315cc6ea75b6e1b34d73f066c47ab46612.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1368
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\onwaakfc\
      2⤵
        PID:1636
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vyvofhbr.exe" C:\Windows\SysWOW64\onwaakfc\
        2⤵
          PID:924
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create onwaakfc binPath= "C:\Windows\SysWOW64\onwaakfc\vyvofhbr.exe /d\"C:\Users\Admin\AppData\Local\Temp\0967dfa48bd1d2d0e282f762e9be80315cc6ea75b6e1b34d73f066c47ab46612.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:560
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description onwaakfc "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:340
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start onwaakfc
          2⤵
          • Launches sc.exe
          PID:1168
        • 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:296
      • C:\Windows\SysWOW64\onwaakfc\vyvofhbr.exe
        C:\Windows\SysWOW64\onwaakfc\vyvofhbr.exe /d"C:\Users\Admin\AppData\Local\Temp\0967dfa48bd1d2d0e282f762e9be80315cc6ea75b6e1b34d73f066c47ab46612.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1180
        • 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:1932
          • 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:1152

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        11.7MB

        MD5

        1bf7272ad4b40ab4e25ff42584d0fb65

        SHA1

        09a523a4bc3dee29ab125406972949af087844bc

        SHA256

        2694043d4cbcf773c19cd35479d0bf1afbae73bdb39e8f3eeafb6ff5b9cd482b

        SHA512

        7646c9d66e4acb64cd356d16e3db8aafd956959d6955efae3abbfc7279ee4417c1a81053860a22fa7f6c2a9c58857189a3246a3a47dab26d8c5da3d6f091c9f7

      • C:\Windows\SysWOW64\onwaakfc\vyvofhbr.exe

        Filesize

        11.7MB

        MD5

        1bf7272ad4b40ab4e25ff42584d0fb65

        SHA1

        09a523a4bc3dee29ab125406972949af087844bc

        SHA256

        2694043d4cbcf773c19cd35479d0bf1afbae73bdb39e8f3eeafb6ff5b9cd482b

        SHA512

        7646c9d66e4acb64cd356d16e3db8aafd956959d6955efae3abbfc7279ee4417c1a81053860a22fa7f6c2a9c58857189a3246a3a47dab26d8c5da3d6f091c9f7

      • memory/1152-119-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1152-124-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1152-123-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1152-122-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1152-120-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1152-121-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1152-112-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1152-111-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1180-64-0x0000000000400000-0x000000000236D000-memory.dmp

        Filesize

        31.4MB

      • memory/1368-60-0x0000000000400000-0x000000000236D000-memory.dmp

        Filesize

        31.4MB

      • memory/1368-56-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/1932-88-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-96-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-81-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-82-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-83-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-84-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-86-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-85-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-87-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-75-0x00000000000C0000-0x00000000000C6000-memory.dmp

        Filesize

        24KB

      • memory/1932-89-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-90-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-91-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-92-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-93-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-94-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-95-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-78-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-97-0x0000000000220000-0x0000000000230000-memory.dmp

        Filesize

        64KB

      • memory/1932-98-0x0000000000230000-0x0000000000235000-memory.dmp

        Filesize

        20KB

      • memory/1932-101-0x0000000000230000-0x0000000000235000-memory.dmp

        Filesize

        20KB

      • memory/1932-102-0x0000000005640000-0x0000000005A4B000-memory.dmp

        Filesize

        4.0MB

      • memory/1932-105-0x0000000005640000-0x0000000005A4B000-memory.dmp

        Filesize

        4.0MB

      • memory/1932-106-0x0000000000280000-0x0000000000287000-memory.dmp

        Filesize

        28KB

      • memory/1932-110-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/1932-74-0x0000000001940000-0x0000000001B4F000-memory.dmp

        Filesize

        2.1MB

      • memory/1932-71-0x0000000001940000-0x0000000001B4F000-memory.dmp

        Filesize

        2.1MB

      • memory/1932-69-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/1932-68-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/1932-67-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/1932-63-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB

      • memory/1932-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1932-61-0x0000000000110000-0x0000000000125000-memory.dmp

        Filesize

        84KB