Analysis

  • max time kernel
    118s
  • max time network
    119s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    06-06-2024 06:41

General

  • Target

    d38a9f6ac940fd239ba8bfc7f979d1abf5e7a0b0e2420d077d5daa2a40919a67.exe

  • Size

    1.8MB

  • MD5

    8df7549f7fd2f933c2cdf8b8bbda162b

  • SHA1

    b3b2c29447b00ed84b14a7aad604632543232208

  • SHA256

    d38a9f6ac940fd239ba8bfc7f979d1abf5e7a0b0e2420d077d5daa2a40919a67

  • SHA512

    2060b259c95264f205cd30bf4af94b77f7966df144e1f600f65df5afffd807816ba02f8c35663703e70309ed3279461b6ce216b42fe76142b7639e421f8fccec

  • SSDEEP

    49152:k75B7FDFXb9Ya8aesY3Ot4N7G/IeUAtK:k75RFD/n0etD/INAt

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

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.

  • Detect binaries embedding considerable number of MFA browser extension IDs. 4 IoCs
  • Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 4 IoCs
  • Detects Windows executables referencing non-Windows User-Agents 9 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 4 IoCs
  • Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 9 IoCs
  • Detects executables containing potential Windows Defender anti-emulation checks 9 IoCs
  • 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\d38a9f6ac940fd239ba8bfc7f979d1abf5e7a0b0e2420d077d5daa2a40919a67.exe
    "C:\Users\Admin\AppData\Local\Temp\d38a9f6ac940fd239ba8bfc7f979d1abf5e7a0b0e2420d077d5daa2a40919a67.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1276
    • C:\Users\Admin\AppData\Local\Temp\kat28D5.tmp
      C:\Users\Admin\AppData\Local\Temp\kat28D5.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:1736

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\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    342B

    MD5

    090ee9aa3a8a7ff171821b9c731f0e07

    SHA1

    a05fbaf8ed4653384aa0f5a74493afdfe9f4f80a

    SHA256

    335e14ebbec61f7b9185763642e952ccd77b0859e137bf2831c6809e38d98e25

    SHA512

    5b0c1239f54758cc7056bfad0a9541ca31c5c6f07a6d52ab3d78b618d7f24239d1a21528582c0ede13782092013fa6764d236f9564b6d0944df96b633ff4505d

  • C:\Users\Admin\AppData\Local\Temp\Tar2F03.tmp

    Filesize

    181KB

    MD5

    4ea6026cf93ec6338144661bf1202cd1

    SHA1

    a1dec9044f750ad887935a01430bf49322fbdcb7

    SHA256

    8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

    SHA512

    6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

  • \Users\Admin\AppData\Local\Temp\kat28D5.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/1276-0-0x0000000000220000-0x0000000000221000-memory.dmp

    Filesize

    4KB

  • memory/1276-2-0x00000000032D0000-0x000000000341B000-memory.dmp

    Filesize

    1.3MB

  • memory/1276-20-0x0000000000400000-0x00000000005CD000-memory.dmp

    Filesize

    1.8MB

  • memory/1736-11-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1736-13-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1736-17-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1736-18-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1736-9-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1736-23-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1736-22-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1736-15-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1736-176-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1736-197-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1736-219-0x000000002AC50000-0x000000002AEAF000-memory.dmp

    Filesize

    2.4MB

  • memory/1736-230-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1736-251-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB