Analysis

  • max time kernel
    117s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    03-06-2024 05:32

General

  • Target

    5cf1875d49763a1e2c06cde297dd35a1a1b6be86ce105de2bd174091f787cc00.exe

  • Size

    2.4MB

  • MD5

    1d3292059e4394a0330e4883521dd5d8

  • SHA1

    7bd98b232f227fe7242621995030bb8a66efad7f

  • SHA256

    5cf1875d49763a1e2c06cde297dd35a1a1b6be86ce105de2bd174091f787cc00

  • SHA512

    8be2dccbfac5322201abedb7965e02bed798f443ef552a1975f5010d430afc1c7dae87db4ad009ff383274c0e37f891d63cdc68de384a9428c12a0c2bafc08a4

  • SSDEEP

    49152:wQc81KnB/a/hNT/dxYa8aesY3Ot4N7G/:wDta/hNT/dxn0etD/

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\5cf1875d49763a1e2c06cde297dd35a1a1b6be86ce105de2bd174091f787cc00.exe
    "C:\Users\Admin\AppData\Local\Temp\5cf1875d49763a1e2c06cde297dd35a1a1b6be86ce105de2bd174091f787cc00.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2248
    • C:\Users\Admin\AppData\Local\Temp\katFC0B.tmp
      C:\Users\Admin\AppData\Local\Temp\katFC0B.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:804

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\94308059B57B3142E455B38A6EB92015

    Filesize

    342B

    MD5

    4290ccd7ee2743829b3908d13a748afb

    SHA1

    f6d5b9cb8deb08c4c693f0d0d91310227123307b

    SHA256

    1918e032da45f8c3a8807dc4ed18ebb5f8bb56d19fbd9cc4db9bd34b35b10604

    SHA512

    c2f71a8c6dcf7ed4ad7f361d89e10e4c8e021c38e3a8bf3c89a06ba765e557c49e5fb8a02a1466a4f10132165162add369bcc42c8c0e59f6de805fce92f14322

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

    Filesize

    242B

    MD5

    0515bbd60e64cbc9de048794135a734c

    SHA1

    02ea7b8e62a0ed1ff01a09d2e08341ba7952ac28

    SHA256

    63d22fcd345469931eebc2bef597f51859643fc6caea876fccfacdb1b061cb8d

    SHA512

    de758ec98f1b37b0a2e0cc4a6f7230817d06a6a26389196903f9e7439f881eacd080520202010093d3cc3387a1d7bb484c0b010eb6caafe81688be6726db7018

  • C:\Users\Admin\AppData\Local\Temp\Tar285.tmp

    Filesize

    181KB

    MD5

    4ea6026cf93ec6338144661bf1202cd1

    SHA1

    a1dec9044f750ad887935a01430bf49322fbdcb7

    SHA256

    8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

    SHA512

    6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

  • \Users\Admin\AppData\Local\Temp\katFC0B.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/804-24-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/804-244-0x0000000028790000-0x00000000289EF000-memory.dmp

    Filesize

    2.4MB

  • memory/804-17-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/804-280-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/804-9-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/804-12-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/804-23-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/804-19-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/804-13-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/804-16-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/804-255-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/804-193-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/804-218-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/2248-0-0x0000000000220000-0x0000000000221000-memory.dmp

    Filesize

    4KB

  • memory/2248-1-0x0000000003460000-0x00000000035AC000-memory.dmp

    Filesize

    1.3MB

  • memory/2248-21-0x0000000000400000-0x0000000000663000-memory.dmp

    Filesize

    2.4MB