Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/06/2023, 23:56

General

  • Target

    file.exe

  • Size

    197KB

  • MD5

    a8e180e8405aad36f842347a505aab7e

  • SHA1

    af1ebcf11365e9c8ff6baf464ea7a8d3e74b11ad

  • SHA256

    9e6f8750e45bd4a16e7994f5fb27cd304b7b564d19ffe1f8bf3003fcc5737d42

  • SHA512

    a03061744fcd7056c6e32063b2ea9f2fa9ac9abcd53fb3c099bec2f47b8d325c51fca93a510fe6a6ffa4c9cb6632edbfa378b72219740fc16168cd897c216b55

  • SSDEEP

    3072:OARH7n2BtHA/FsO7y8Bam5RtTjub5h7cQR+b+96L:7RbnWC/FZymaMRtHmh3e+

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
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4128
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ojsgpdfg\
      2⤵
        PID:4524
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hxxugsig.exe" C:\Windows\SysWOW64\ojsgpdfg\
        2⤵
          PID:3516
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ojsgpdfg binPath= "C:\Windows\SysWOW64\ojsgpdfg\hxxugsig.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1912
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ojsgpdfg "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4324
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ojsgpdfg
          2⤵
          • Launches sc.exe
          PID:720
        • 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:4108
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4128 -s 1360
          2⤵
          • Program crash
          PID:2192
      • C:\Windows\SysWOW64\ojsgpdfg\hxxugsig.exe
        C:\Windows\SysWOW64\ojsgpdfg\hxxugsig.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4388
        • 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:116
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe --algo=cn-heavy/xhv -o fastpool.xyz:10162 -u abLocBRHmSKSwfZexhaPDFFpUd1Szsp1RWPZktGDuK2w76S3KYNSLGndi55YtoHoKYbSFMCCWjxzTfwHxZSm7sNLe2rAq4DqbAF.70000 -p x -k
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:4068
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4388 -s 512
          2⤵
          • Program crash
          PID:4752
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4128 -ip 4128
        1⤵
          PID:556
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 4388 -ip 4388
          1⤵
            PID:228

          Network

                MITRE ATT&CK Enterprise v6

                Replay Monitor

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                Downloads

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

                  Filesize

                  12.1MB

                  MD5

                  85153a54e34b8d5ddd5b294ab42ac88c

                  SHA1

                  4ef08ca395984704197f7fa09b78e83fcdb05fc2

                  SHA256

                  6dced7fb01b7b80613cc7ddc5539e396ba2b5adf1a3ab436de713594eed3cbfa

                  SHA512

                  c57f35add2d37fa50552020133847f2683bb0755cb8ac8db35bb4828932a3967334ce0636ab7ce44e92a85d113a866ce6e6ef4fa936f687531bbe3897495447e

                • C:\Windows\SysWOW64\ojsgpdfg\hxxugsig.exe

                  Filesize

                  12.1MB

                  MD5

                  85153a54e34b8d5ddd5b294ab42ac88c

                  SHA1

                  4ef08ca395984704197f7fa09b78e83fcdb05fc2

                  SHA256

                  6dced7fb01b7b80613cc7ddc5539e396ba2b5adf1a3ab436de713594eed3cbfa

                  SHA512

                  c57f35add2d37fa50552020133847f2683bb0755cb8ac8db35bb4828932a3967334ce0636ab7ce44e92a85d113a866ce6e6ef4fa936f687531bbe3897495447e

                • memory/116-166-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-168-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-170-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-143-0x0000000000490000-0x00000000004A5000-memory.dmp

                  Filesize

                  84KB

                • memory/116-144-0x0000000000490000-0x00000000004A5000-memory.dmp

                  Filesize

                  84KB

                • memory/116-184-0x00000000025F0000-0x00000000025F7000-memory.dmp

                  Filesize

                  28KB

                • memory/116-146-0x0000000000490000-0x00000000004A5000-memory.dmp

                  Filesize

                  84KB

                • memory/116-148-0x0000000000490000-0x00000000004A5000-memory.dmp

                  Filesize

                  84KB

                • memory/116-149-0x0000000002000000-0x000000000220F000-memory.dmp

                  Filesize

                  2.1MB

                • memory/116-152-0x0000000002000000-0x000000000220F000-memory.dmp

                  Filesize

                  2.1MB

                • memory/116-153-0x0000000000960000-0x0000000000966000-memory.dmp

                  Filesize

                  24KB

                • memory/116-156-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-159-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-160-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-162-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-163-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-161-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-164-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-165-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-167-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-183-0x0000000007180000-0x000000000758B000-memory.dmp

                  Filesize

                  4.0MB

                • memory/116-180-0x0000000007180000-0x000000000758B000-memory.dmp

                  Filesize

                  4.0MB

                • memory/116-140-0x0000000000490000-0x00000000004A5000-memory.dmp

                  Filesize

                  84KB

                • memory/116-169-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-171-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-172-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-173-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-174-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-175-0x00000000017E0000-0x00000000017F0000-memory.dmp

                  Filesize

                  64KB

                • memory/116-176-0x00000000025E0000-0x00000000025E5000-memory.dmp

                  Filesize

                  20KB

                • memory/116-179-0x00000000025E0000-0x00000000025E5000-memory.dmp

                  Filesize

                  20KB

                • memory/4068-188-0x0000000000720000-0x0000000000811000-memory.dmp

                  Filesize

                  964KB

                • memory/4068-193-0x0000000000720000-0x0000000000811000-memory.dmp

                  Filesize

                  964KB

                • memory/4068-196-0x0000000000720000-0x0000000000811000-memory.dmp

                  Filesize

                  964KB

                • memory/4068-195-0x0000000000720000-0x0000000000811000-memory.dmp

                  Filesize

                  964KB

                • memory/4068-198-0x0000000000720000-0x0000000000811000-memory.dmp

                  Filesize

                  964KB

                • memory/4068-199-0x0000000000720000-0x0000000000811000-memory.dmp

                  Filesize

                  964KB

                • memory/4068-197-0x0000000000720000-0x0000000000811000-memory.dmp

                  Filesize

                  964KB

                • memory/4068-194-0x0000000000720000-0x0000000000811000-memory.dmp

                  Filesize

                  964KB

                • memory/4128-135-0x00000000020B0000-0x00000000020C3000-memory.dmp

                  Filesize

                  76KB

                • memory/4128-139-0x0000000000400000-0x00000000004A8000-memory.dmp

                  Filesize

                  672KB

                • memory/4388-145-0x0000000000400000-0x00000000004A8000-memory.dmp

                  Filesize

                  672KB