Analysis

  • max time kernel
    144s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    07/05/2024, 03:53

General

  • Target

    6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe

  • Size

    248KB

  • MD5

    6034c4f4fd7240dc2f0331a916a43c00

  • SHA1

    bf49b157864df4e65150b9093bf6d957cf864641

  • SHA256

    d701cb5b78ad384ed221a35e2c03313fa8803ce051104a997786b87ff4c32ea2

  • SHA512

    65f85460c629ee29c8252a3cb641023e319450032942c034852189cb5480034585ce0981a5cf95491069df4c8cac00df96184ac40e3c1db47dc02ae1ff69d04f

  • SSDEEP

    6144:6lez2ssftlVN+zBfGrSWm+omDAgQsSygGG2SzA9T2:H6silNoGSJ+omDAdsWGLS8k

Malware Config

Signatures

  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 7 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Drops file in Program Files directory 4 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe
    "C:\Users\Admin\AppData\Local\Temp\6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe"
    1⤵
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1152
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\pjamq.exe "C:\Users\Admin\AppData\Local\Temp\6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2184
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • Runs ping.exe
        PID:1912
      • C:\Users\Admin\AppData\Local\Temp\pjamq.exe
        C:\Users\Admin\AppData\Local\Temp\\pjamq.exe "C:\Users\Admin\AppData\Local\Temp\6034c4f4fd7240dc2f0331a916a43c00_NEAS.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • Loads dropped DLL
        • Drops file in Program Files directory
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2980
        • \??\c:\Program Files\kyazhh\frnz.exe
          "c:\Program Files\kyazhh\frnz.exe" "c:\Program Files\kyazhh\frnzk.dll",WriteErrorLog C:\Users\Admin\AppData\Local\Temp\pjamq.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Adds Run key to start application
          • Enumerates connected drives
          • Writes to the Master Boot Record (MBR)
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2884

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • \Program Files\kyazhh\frnz.exe

          Filesize

          43KB

          MD5

          51138beea3e2c21ec44d0932c71762a8

          SHA1

          8939cf35447b22dd2c6e6f443446acc1bf986d58

          SHA256

          5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124

          SHA512

          794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

        • \Program Files\kyazhh\frnzk.dll

          Filesize

          181KB

          MD5

          e4151202a2a65d0d54e26b865c9a944f

          SHA1

          cf2a08013c3daf99745898a7ff8022ed282fce34

          SHA256

          7f24733875cc46a27fc695370b068e3fe0502e47e3f30128ee9cbb023f74c2fd

          SHA512

          5bf41f31b2e44b1f5dbd7d2a78bf56d018e1c3e5a0d633d584f1b6700a96d18fe92343a03acc78c974164a50afaad38268ddd3f0641c930faf78f15342b5dae5

        • \Users\Admin\AppData\Local\Temp\pjamq.exe

          Filesize

          248KB

          MD5

          e9e7d97d53cb3a179131b5f66ccde20c

          SHA1

          563330ea45a691cda3cb51881302ddaac75a65ad

          SHA256

          1d5876ec77d1c7c0312cdfb906ee09f3487f084dbcb5d58d72335da169a57d2b

          SHA512

          c5728ec35f11d842a13238986a074ba75f6b01d39f38887b57ba427417f0e44a3799d3fd6a224a57f8d2ca8a860635ad3dbc41be6a575f931bd81e56dfde9ae3

        • memory/1152-1-0x0000000000400000-0x000000000047301D-memory.dmp

          Filesize

          460KB

        • memory/2884-23-0x0000000010000000-0x000000001004E000-memory.dmp

          Filesize

          312KB

        • memory/2884-18-0x0000000010000000-0x000000001004E000-memory.dmp

          Filesize

          312KB

        • memory/2884-19-0x0000000010000000-0x000000001004E000-memory.dmp

          Filesize

          312KB

        • memory/2884-21-0x0000000010000000-0x000000001004E000-memory.dmp

          Filesize

          312KB

        • memory/2884-22-0x0000000000130000-0x0000000000132000-memory.dmp

          Filesize

          8KB

        • memory/2884-25-0x0000000010000000-0x000000001004E000-memory.dmp

          Filesize

          312KB

        • memory/2884-27-0x0000000010000000-0x000000001004E000-memory.dmp

          Filesize

          312KB

        • memory/2884-29-0x0000000000130000-0x0000000000132000-memory.dmp

          Filesize

          8KB

        • memory/2884-32-0x0000000010000000-0x000000001004E000-memory.dmp

          Filesize

          312KB

        • memory/2884-36-0x0000000010000000-0x000000001004E000-memory.dmp

          Filesize

          312KB

        • memory/2980-11-0x0000000000400000-0x000000000047301D-memory.dmp

          Filesize

          460KB