Analysis

  • max time kernel
    146s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    13-11-2024 13:28

General

  • Target

    db16f294b80c3e14ddbed1ffecce363376e363c4d4318655a103618b44ad6922.exe

  • Size

    203KB

  • MD5

    3e0950e80ecfffd7ae7e266aff2018bd

  • SHA1

    77bd5c50eae58e042e0a7c6608015a5665428894

  • SHA256

    db16f294b80c3e14ddbed1ffecce363376e363c4d4318655a103618b44ad6922

  • SHA512

    ec7f5a0a30e21d65baa947acb1f88085754aa29da49e6c1f89dce8d114579fbf77f1353b98827fb8d0b375dc9ac1e3e586e621e99ec33e485295924109fff379

  • SSDEEP

    3072:fP5gvNVLIfHQja1RfmLQADwSKkhU+tLgT5lODbiC8r1PkTO:X2vnSwjaOcADw9cUeCOfc

Malware Config

Signatures

  • Deletes itself 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 7 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • 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
  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • 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\db16f294b80c3e14ddbed1ffecce363376e363c4d4318655a103618b44ad6922.exe
    "C:\Users\Admin\AppData\Local\Temp\db16f294b80c3e14ddbed1ffecce363376e363c4d4318655a103618b44ad6922.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2128
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c ping 127.0.0.1 -n 2&C:\Users\Admin\AppData\Local\Temp\\crivr.exe "C:\Users\Admin\AppData\Local\Temp\db16f294b80c3e14ddbed1ffecce363376e363c4d4318655a103618b44ad6922.exe"
      2⤵
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • System Network Configuration Discovery: Internet Connection Discovery
      • Suspicious use of WriteProcessMemory
      PID:2692
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 2
        3⤵
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Internet Connection Discovery
        • Runs ping.exe
        PID:3020
      • C:\Users\Admin\AppData\Local\Temp\crivr.exe
        C:\Users\Admin\AppData\Local\Temp\\crivr.exe "C:\Users\Admin\AppData\Local\Temp\db16f294b80c3e14ddbed1ffecce363376e363c4d4318655a103618b44ad6922.exe"
        3⤵
        • Deletes itself
        • Executes dropped EXE
        • Loads dropped DLL
        • Drops file in Program Files directory
        • System Location Discovery: System Language Discovery
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2956
        • \??\c:\Program Files\efsif\sfu.exe
          "c:\Program Files\efsif\sfu.exe" "c:\Program Files\efsif\sfuzh.dll",Compliance C:\Users\Admin\AppData\Local\Temp\crivr.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Adds Run key to start application
          • Enumerates connected drives
          • Writes to the Master Boot Record (MBR)
          • System Location Discovery: System Language Discovery
          • Checks processor information in registry
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1444

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \??\c:\Program Files\efsif\sfuzh.dll

    Filesize

    141KB

    MD5

    eed6d6149ae327a6d8a5cbd7cd5a2e60

    SHA1

    637dc935f68b192bbc39661d77e848a1335a0f08

    SHA256

    547cc880d44b10e729de104a51a8efe13be605468df29ce2ad8c5b2766e8c33d

    SHA512

    d9349811c4da1aa63834858b35dd7ec2ae7c65c2f1d0aeecb1867fbfcac107d9ca4a5bd43793c7ccf5ce9e300e0c003f2df5a0be6ffbc13d36fbe3ea0aabe98b

  • \Program Files\efsif\sfu.exe

    Filesize

    43KB

    MD5

    51138beea3e2c21ec44d0932c71762a8

    SHA1

    8939cf35447b22dd2c6e6f443446acc1bf986d58

    SHA256

    5ad3c37e6f2b9db3ee8b5aeedc474645de90c66e3d95f8620c48102f1eba4124

    SHA512

    794f30fe452117ff2a26dc9d7086aaf82b639c2632ac2e381a81f5239caaec7c96922ba5d2d90bfd8d74f0a6cd4f79fbda63e14c6b779e5cf6834c13e4e45e7d

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

    Filesize

    203KB

    MD5

    b74e39bc02b7e999791ea419bd6260fa

    SHA1

    7131f431fe7852f94e622b8f28d807d3140e8bec

    SHA256

    0d1190ca2570bede1ad77486cbc42dee8664ce79e19efd62319492660efbef3f

    SHA512

    07803e9dd10404ce9ebb4f06b48d9eed09e1693ae2f53bb92ebe9dc4478d941a0fc191e70a3fdaf70e28fe58b282557592aa2912afcc2cc7b3483937e638a1c1

  • memory/1444-28-0x0000000010000000-0x000000001004E000-memory.dmp

    Filesize

    312KB

  • memory/1444-31-0x0000000010000000-0x000000001004E000-memory.dmp

    Filesize

    312KB

  • memory/1444-29-0x0000000010000000-0x000000001004E000-memory.dmp

    Filesize

    312KB

  • memory/1444-26-0x0000000010000000-0x000000001004E000-memory.dmp

    Filesize

    312KB

  • memory/1444-27-0x0000000010000000-0x000000001004E000-memory.dmp

    Filesize

    312KB

  • memory/2128-0-0x0000000000400000-0x000000000044901D-memory.dmp

    Filesize

    292KB

  • memory/2128-4-0x0000000000400000-0x000000000044901D-memory.dmp

    Filesize

    292KB

  • memory/2128-2-0x0000000000400000-0x000000000044901D-memory.dmp

    Filesize

    292KB

  • memory/2128-1-0x0000000000400000-0x000000000044901D-memory.dmp

    Filesize

    292KB

  • memory/2692-8-0x00000000022F0000-0x000000000233A000-memory.dmp

    Filesize

    296KB

  • memory/2956-10-0x0000000000400000-0x000000000044901D-memory.dmp

    Filesize

    292KB

  • memory/2956-19-0x0000000000400000-0x000000000044901D-memory.dmp

    Filesize

    292KB

  • memory/2956-11-0x0000000000400000-0x000000000044901D-memory.dmp

    Filesize

    292KB