Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/03/2024, 18:41

General

  • Target

    deb0c884cd5bdf35238e063bc643c2e5.exe

  • Size

    11.7MB

  • MD5

    deb0c884cd5bdf35238e063bc643c2e5

  • SHA1

    79a9bb56636321130ad4a6e031026521a645e195

  • SHA256

    69124d1b3d101c9199c4d39f766ac185a8a0bd2f191b1295fb2d5780a3b0f38b

  • SHA512

    730ac2567491cb39d321a34cabb93db0cabb9bf1f55563facd4092375d3f95fe823540301ec95ba7f6c07cae355fb6062cf8567863b0b28cbfe7af0c510e530b

  • SSDEEP

    49152:m88888888888888888888888888888888888888888888888888888888888888f:

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

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\deb0c884cd5bdf35238e063bc643c2e5.exe
    "C:\Users\Admin\AppData\Local\Temp\deb0c884cd5bdf35238e063bc643c2e5.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3520
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rftiouo\
      2⤵
        PID:4248
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\umrryqko.exe" C:\Windows\SysWOW64\rftiouo\
        2⤵
          PID:4668
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rftiouo binPath= "C:\Windows\SysWOW64\rftiouo\umrryqko.exe /d\"C:\Users\Admin\AppData\Local\Temp\deb0c884cd5bdf35238e063bc643c2e5.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3504
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rftiouo "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3088
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rftiouo
          2⤵
          • Launches sc.exe
          PID:1824
        • 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:2356
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3520 -s 1144
          2⤵
          • Program crash
          PID:3716
      • C:\Windows\SysWOW64\rftiouo\umrryqko.exe
        C:\Windows\SysWOW64\rftiouo\umrryqko.exe /d"C:\Users\Admin\AppData\Local\Temp\deb0c884cd5bdf35238e063bc643c2e5.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4892
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:3292
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4892 -s 520
          2⤵
          • Program crash
          PID:4468
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3520 -ip 3520
        1⤵
          PID:3660
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 4892 -ip 4892
          1⤵
            PID:2036

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            2.9MB

            MD5

            2232ee21559e758efa573ea441a22079

            SHA1

            90facbe9e15c277e6017acf19e16b5741561db6f

            SHA256

            2b2d3ad70a25acc6507ef12b6d6840f2b875afd52b471ebc2d7882bf3100b1b6

            SHA512

            3d9bba60e4b7e7c34a730cdb2a3b7360377ffe64d9ccdae435eedd42e4e46c09cffcb97ff72f5d2b1bf22bc122cdf22b12a8ae93797b71c2b1e889bea0bb35b2

          • C:\Windows\SysWOW64\rftiouo\umrryqko.exe

            Filesize

            3.0MB

            MD5

            fb53adeea5e5958b4583bf150b4ea358

            SHA1

            ccd655df72192627111c7de74ce1616b2322f661

            SHA256

            a724dc068b93cd5a0015fd57c5ce873c4e636a69f7fc62e34b736c30efcf9e7e

            SHA512

            7f1a8774780f0c65fe4f1235cf78c936d5a0680527f538db870ae0527c5137c9446bcb51f34e71a3bbe6e930444649baa315d36119ecffffb1a1ddcbbd31e011

          • memory/3292-11-0x0000000000E20000-0x0000000000E35000-memory.dmp

            Filesize

            84KB

          • memory/3292-19-0x0000000000E20000-0x0000000000E35000-memory.dmp

            Filesize

            84KB

          • memory/3292-17-0x0000000000E20000-0x0000000000E35000-memory.dmp

            Filesize

            84KB

          • memory/3292-14-0x0000000000E20000-0x0000000000E35000-memory.dmp

            Filesize

            84KB

          • memory/3520-9-0x0000000002CF0000-0x0000000002D03000-memory.dmp

            Filesize

            76KB

          • memory/3520-1-0x0000000002DC0000-0x0000000002EC0000-memory.dmp

            Filesize

            1024KB

          • memory/3520-8-0x0000000000400000-0x0000000002C68000-memory.dmp

            Filesize

            40.4MB

          • memory/3520-4-0x0000000000400000-0x0000000002C68000-memory.dmp

            Filesize

            40.4MB

          • memory/3520-2-0x0000000002CF0000-0x0000000002D03000-memory.dmp

            Filesize

            76KB

          • memory/4892-10-0x0000000002D70000-0x0000000002E70000-memory.dmp

            Filesize

            1024KB

          • memory/4892-15-0x0000000000400000-0x0000000002C68000-memory.dmp

            Filesize

            40.4MB

          • memory/4892-18-0x0000000000400000-0x0000000002C68000-memory.dmp

            Filesize

            40.4MB