Analysis

  • max time kernel
    149s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/03/2024, 04:53

General

  • Target

    c50606fc4ff46ed15174748afa93aea0.exe

  • Size

    14.6MB

  • MD5

    c50606fc4ff46ed15174748afa93aea0

  • SHA1

    5ef3f3a758a2a539598fb94165d198fa3b22b7f6

  • SHA256

    86a41d419fb7833463a06e7e6774617b8db86c1d41259def41e61a396370b164

  • SHA512

    47f9863f1311bfd9f73032082e97f6970c0a721a4e483fb9a3a08be1a62e9cecff04a045be34e72a3d02bfa265a163a7a35d13fff3251e45ae05cb5502bdee9b

  • SSDEEP

    24576:HNrrSkMiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiK:Rek

Malware Config

Extracted

Family

tofsee

C2

176.111.174.19

defeatwax.ru

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 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.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Suspicious use of SetThreadContext 1 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
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c50606fc4ff46ed15174748afa93aea0.exe
    "C:\Users\Admin\AppData\Local\Temp\c50606fc4ff46ed15174748afa93aea0.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:180
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jwuyehcc\
      2⤵
        PID:4496
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\urkzaldq.exe" C:\Windows\SysWOW64\jwuyehcc\
        2⤵
          PID:1360
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jwuyehcc binPath= "C:\Windows\SysWOW64\jwuyehcc\urkzaldq.exe /d\"C:\Users\Admin\AppData\Local\Temp\c50606fc4ff46ed15174748afa93aea0.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4152
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description jwuyehcc "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2004
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start jwuyehcc
          2⤵
          • Launches sc.exe
          PID:4796
        • 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:1328
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 180 -s 1040
          2⤵
          • Program crash
          PID:4588
      • C:\Windows\SysWOW64\jwuyehcc\urkzaldq.exe
        C:\Windows\SysWOW64\jwuyehcc\urkzaldq.exe /d"C:\Users\Admin\AppData\Local\Temp\c50606fc4ff46ed15174748afa93aea0.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3920
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:4520
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3920 -s 520
          2⤵
          • Program crash
          PID:4420
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 180 -ip 180
        1⤵
          PID:508
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 3920 -ip 3920
          1⤵
            PID:3780

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

                Loading Replay Monitor...

                Downloads

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

                  Filesize

                  6.9MB

                  MD5

                  d78cf181e7da03ea8343c5c02aa3537f

                  SHA1

                  b3b15677c18bda10f19fdf143754c302b9d62133

                  SHA256

                  6338a4442565e2ecd477fbc557d98e9f0b7e401719f9de9d0400def4966dc351

                  SHA512

                  a0870703416b035a8dabc49f53ebdfd1fcf73a15874c797fa641ef170ee3a291cd1ece2d332a4aa7e01c62a8d838b1b92835b98187f14d87899a8ee924b9d2d2

                • C:\Windows\SysWOW64\jwuyehcc\urkzaldq.exe

                  Filesize

                  921KB

                  MD5

                  28202127a15c40f3062f2e2c6c9fb59c

                  SHA1

                  fe32bb2d2a489c6751c1edd2c39a8165eaf18916

                  SHA256

                  751419385a0ee626ee544f25774dddd2259ab4841ecf2961c25aaba83d5d3793

                  SHA512

                  a11d245973b831c550bd9f03ebf22e455ef6c7018a8abde0c0a2c48bab0e9fb3b025feb6075cf63e857da0923824ecee2518442ce12a9e505fa2a0e407ed6b0d

                • memory/180-8-0x0000000000400000-0x000000000099D000-memory.dmp

                  Filesize

                  5.6MB

                • memory/180-4-0x0000000000400000-0x000000000099D000-memory.dmp

                  Filesize

                  5.6MB

                • memory/180-2-0x0000000000B40000-0x0000000000B53000-memory.dmp

                  Filesize

                  76KB

                • memory/180-9-0x0000000000B40000-0x0000000000B53000-memory.dmp

                  Filesize

                  76KB

                • memory/180-1-0x0000000000B60000-0x0000000000C60000-memory.dmp

                  Filesize

                  1024KB

                • memory/3920-10-0x0000000000CC0000-0x0000000000DC0000-memory.dmp

                  Filesize

                  1024KB

                • memory/3920-11-0x0000000000400000-0x000000000099D000-memory.dmp

                  Filesize

                  5.6MB

                • memory/3920-18-0x0000000000400000-0x000000000099D000-memory.dmp

                  Filesize

                  5.6MB

                • memory/4520-12-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

                  Filesize

                  84KB

                • memory/4520-15-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

                  Filesize

                  84KB

                • memory/4520-17-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

                  Filesize

                  84KB

                • memory/4520-19-0x0000000000CE0000-0x0000000000CF5000-memory.dmp

                  Filesize

                  84KB