Analysis

  • max time kernel
    118s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    07-06-2024 02:13

General

  • Target

    f46237fd8f76741c8878f0933e1c742aedad00a1bc07a815b887b04c6151d507.exe

  • Size

    2.4MB

  • MD5

    d78fcd5a2d4bbc097428bda03b481b9c

  • SHA1

    b874cb504147dcedc1416f5860b6db8b9e4d8cf0

  • SHA256

    f46237fd8f76741c8878f0933e1c742aedad00a1bc07a815b887b04c6151d507

  • SHA512

    0f55dfb0b6d81af4aa1b195db9a9a3d56f650cd1e7bb28de5221b434998533898d8f9503a2c34a0fa72833e64ed63abb69a6c427ba79ea55709a63f427ce8921

  • SSDEEP

    49152:wQc81KnB/a/hNT/dlYa8aesY3Ot4N7G/:wDta/hNT/dln0etD/

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/ta904ek

https://steamcommunity.com/profiles/76561199695752269

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

  • Detect Vidar Stealer 10 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Suspicious use of SetThreadContext 1 IoCs
  • Checks processor information in registry 2 TTPs 1 IoCs

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

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f46237fd8f76741c8878f0933e1c742aedad00a1bc07a815b887b04c6151d507.exe
    "C:\Users\Admin\AppData\Local\Temp\f46237fd8f76741c8878f0933e1c742aedad00a1bc07a815b887b04c6151d507.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2240
    • C:\Users\Admin\AppData\Local\Temp\katFBA.tmp
      C:\Users\Admin\AppData\Local\Temp\katFBA.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:784

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

    Filesize

    70KB

    MD5

    49aebf8cbd62d92ac215b2923fb1b9f5

    SHA1

    1723be06719828dda65ad804298d0431f6aff976

    SHA256

    b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

    SHA512

    bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\F0ACCF77CDCBFF39F6191887F6D2D357

    Filesize

    1KB

    MD5

    a266bb7dcc38a562631361bbf61dd11b

    SHA1

    3b1efd3a66ea28b16697394703a72ca340a05bd5

    SHA256

    df545bf919a2439c36983b54cdfc903dfa4f37d3996d8d84b4c31eec6f3c163e

    SHA512

    0da8ef4f8f6ed3d16d2bc8eb816b9e6e1345dfe2d91160196c47e6149a1d6aedaafadcefd66acdea7f72dcf0832770192ceac15b0c559c4ccc2c0e5581d5aefc

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\F0ACCF77CDCBFF39F6191887F6D2D357

    Filesize

    242B

    MD5

    6e429ad15321535fc7b219125bec6c2d

    SHA1

    6974f185f94db81d41503bbce71786a8b925bf62

    SHA256

    5846b775e79be89ba4f7badcbbe65fcdf573df89b54b3d549cfe9ea46eb31609

    SHA512

    bc574eaa7aab6e8527b0f4bd07aeb3be1e25eddf37a6930018694102199ffc43018faf64e2abe132bfdbe38ea74ccdd1bd6836b203e2b80678eac4620000e79e

  • C:\Users\Admin\AppData\Local\Temp\Tar15D7.tmp

    Filesize

    181KB

    MD5

    4ea6026cf93ec6338144661bf1202cd1

    SHA1

    a1dec9044f750ad887935a01430bf49322fbdcb7

    SHA256

    8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

    SHA512

    6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

  • \Users\Admin\AppData\Local\Temp\katFBA.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/784-24-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/784-249-0x0000000028800000-0x0000000028A5F000-memory.dmp

    Filesize

    2.4MB

  • memory/784-13-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/784-285-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/784-19-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/784-11-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/784-9-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/784-17-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/784-23-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/784-15-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/784-260-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/784-198-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/784-223-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2240-0-0x0000000000220000-0x0000000000221000-memory.dmp

    Filesize

    4KB

  • memory/2240-2-0x0000000002230000-0x000000000237C000-memory.dmp

    Filesize

    1.3MB

  • memory/2240-21-0x0000000000400000-0x0000000000663000-memory.dmp

    Filesize

    2.4MB