Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/07/2023, 12:56

General

  • Target

    3fca66d3dd218bf116c8a29953a2556c02f229353f61ab87bbfb10b9628b60db.exe

  • Size

    198KB

  • MD5

    7b319155d681ac4750a7162e532af1dc

  • SHA1

    6ce6543606ac9eb445874280fe2b46014ef4da60

  • SHA256

    3fca66d3dd218bf116c8a29953a2556c02f229353f61ab87bbfb10b9628b60db

  • SHA512

    37a63ead65b9706689cd31a03736e46d85e19b7957870f45ed11c0e2b7d647542208eca269d3292dc8aa3fe3af73b7bbd39eb986b0e45f567277ed8b8d404cea

  • SSDEEP

    3072:3NuULXLhffflMBjRa6sHHbwvWTGEaYLBRJrQIzbY/l1PR580D5lTwQh:9/LXLNfl8RaDHHbrRkWYfR58oTwS

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.

  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 8 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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).

  • Program crash 2 IoCs
  • 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\3fca66d3dd218bf116c8a29953a2556c02f229353f61ab87bbfb10b9628b60db.exe
    "C:\Users\Admin\AppData\Local\Temp\3fca66d3dd218bf116c8a29953a2556c02f229353f61ab87bbfb10b9628b60db.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2676
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zlhuckmv\
      2⤵
        PID:4404
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cjivddlp.exe" C:\Windows\SysWOW64\zlhuckmv\
        2⤵
          PID:1612
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zlhuckmv binPath= "C:\Windows\SysWOW64\zlhuckmv\cjivddlp.exe /d\"C:\Users\Admin\AppData\Local\Temp\3fca66d3dd218bf116c8a29953a2556c02f229353f61ab87bbfb10b9628b60db.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3824
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description zlhuckmv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4856
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start zlhuckmv
          2⤵
          • Launches sc.exe
          PID:4156
        • 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:4680
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2676 -s 1292
          2⤵
          • Program crash
          PID:1628
      • C:\Windows\SysWOW64\zlhuckmv\cjivddlp.exe
        C:\Windows\SysWOW64\zlhuckmv\cjivddlp.exe /d"C:\Users\Admin\AppData\Local\Temp\3fca66d3dd218bf116c8a29953a2556c02f229353f61ab87bbfb10b9628b60db.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:440
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:1616
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.70000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3172
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 440 -s 516
          2⤵
          • Program crash
          PID:2056
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 2676 -ip 2676
        1⤵
          PID:552
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 440 -ip 440
          1⤵
            PID:3840

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

                Loading Replay Monitor...

                Downloads

                • C:\Users\Admin\AppData\Local\Temp\cjivddlp.exe

                  Filesize

                  10.3MB

                  MD5

                  a0059d390ccb9fe4acbd62803927afda

                  SHA1

                  816bee0e3c4cb02a332ae6746e60e0d20d58f032

                  SHA256

                  b4d5a65ac221f5185ed5465d49cf69fa5447651e151cdb20bfe2e8c4268b4748

                  SHA512

                  d09a368a1b1f68c4339f46f80672d756420e4f906aea36af746a2e7d0d947d280e53f90dbd3bbfa149d10fbb88ab6b0407a614d4c02f7ff81b5699ff5c7ae8d4

                • C:\Windows\SysWOW64\zlhuckmv\cjivddlp.exe

                  Filesize

                  10.3MB

                  MD5

                  a0059d390ccb9fe4acbd62803927afda

                  SHA1

                  816bee0e3c4cb02a332ae6746e60e0d20d58f032

                  SHA256

                  b4d5a65ac221f5185ed5465d49cf69fa5447651e151cdb20bfe2e8c4268b4748

                  SHA512

                  d09a368a1b1f68c4339f46f80672d756420e4f906aea36af746a2e7d0d947d280e53f90dbd3bbfa149d10fbb88ab6b0407a614d4c02f7ff81b5699ff5c7ae8d4

                • memory/440-146-0x0000000000400000-0x0000000000473000-memory.dmp

                  Filesize

                  460KB

                • memory/1616-167-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-169-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-170-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-144-0x0000000000590000-0x00000000005A5000-memory.dmp

                  Filesize

                  84KB

                • memory/1616-145-0x0000000000590000-0x00000000005A5000-memory.dmp

                  Filesize

                  84KB

                • memory/1616-185-0x0000000001BE0000-0x0000000001BE7000-memory.dmp

                  Filesize

                  28KB

                • memory/1616-147-0x0000000000590000-0x00000000005A5000-memory.dmp

                  Filesize

                  84KB

                • memory/1616-149-0x0000000000590000-0x00000000005A5000-memory.dmp

                  Filesize

                  84KB

                • memory/1616-150-0x0000000002400000-0x000000000260F000-memory.dmp

                  Filesize

                  2.1MB

                • memory/1616-153-0x0000000002400000-0x000000000260F000-memory.dmp

                  Filesize

                  2.1MB

                • memory/1616-154-0x0000000000890000-0x0000000000896000-memory.dmp

                  Filesize

                  24KB

                • memory/1616-157-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-161-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-162-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-160-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-163-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-164-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-165-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-166-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-184-0x0000000007500000-0x000000000790B000-memory.dmp

                  Filesize

                  4.0MB

                • memory/1616-181-0x0000000007500000-0x000000000790B000-memory.dmp

                  Filesize

                  4.0MB

                • memory/1616-168-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-141-0x0000000000590000-0x00000000005A5000-memory.dmp

                  Filesize

                  84KB

                • memory/1616-171-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-172-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-173-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-174-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-175-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-176-0x00000000008A0000-0x00000000008B0000-memory.dmp

                  Filesize

                  64KB

                • memory/1616-177-0x00000000009F0000-0x00000000009F5000-memory.dmp

                  Filesize

                  20KB

                • memory/1616-180-0x00000000009F0000-0x00000000009F5000-memory.dmp

                  Filesize

                  20KB

                • memory/2676-139-0x0000000000400000-0x0000000000473000-memory.dmp

                  Filesize

                  460KB

                • memory/2676-134-0x00000000021B0000-0x00000000021C3000-memory.dmp

                  Filesize

                  76KB

                • memory/2676-140-0x00000000021B0000-0x00000000021C3000-memory.dmp

                  Filesize

                  76KB

                • memory/3172-189-0x0000000000C20000-0x0000000000D11000-memory.dmp

                  Filesize

                  964KB

                • memory/3172-194-0x0000000000C20000-0x0000000000D11000-memory.dmp

                  Filesize

                  964KB

                • memory/3172-195-0x0000000000C20000-0x0000000000D11000-memory.dmp

                  Filesize

                  964KB

                • memory/3172-196-0x0000000000C20000-0x0000000000D11000-memory.dmp

                  Filesize

                  964KB

                • memory/3172-197-0x0000000000C20000-0x0000000000D11000-memory.dmp

                  Filesize

                  964KB

                • memory/3172-198-0x0000000000C20000-0x0000000000D11000-memory.dmp

                  Filesize

                  964KB

                • memory/3172-199-0x0000000000C20000-0x0000000000D11000-memory.dmp

                  Filesize

                  964KB

                • memory/3172-200-0x0000000000C20000-0x0000000000D11000-memory.dmp

                  Filesize

                  964KB