Analysis

  • max time kernel
    121s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    27-05-2024 19:40

General

  • Target

    1e6da474e836fc49b5db4d5324ba44f784ed42b21019f89a439fa8086fd71927.exe

  • Size

    2.0MB

  • MD5

    f3fa120953f852dc95de617a6f2dc6b4

  • SHA1

    f6c223826fd3af1a4cdc6a562313670a9ac9c916

  • SHA256

    1e6da474e836fc49b5db4d5324ba44f784ed42b21019f89a439fa8086fd71927

  • SHA512

    e31ba4087eb1fac0511b55293e1769e3267ece05689cda155a04f6c144dff0cd99430438132b3958388165f8a47ff8d52d5116374dac903100e8d04ea11ba9b3

  • SSDEEP

    49152:OePpQElJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEltIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

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 3 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1e6da474e836fc49b5db4d5324ba44f784ed42b21019f89a439fa8086fd71927.exe
    "C:\Users\Admin\AppData\Local\Temp\1e6da474e836fc49b5db4d5324ba44f784ed42b21019f89a439fa8086fd71927.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2240
    • C:\Users\Admin\AppData\Local\Temp\kat17A6.tmp
      C:\Users\Admin\AppData\Local\Temp\kat17A6.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:1136

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    68KB

    MD5

    29f65ba8e88c063813cc50a4ea544e93

    SHA1

    05a7040d5c127e68c25d81cc51271ffb8bef3568

    SHA256

    1ed81fa8dfb6999a9fedc6e779138ffd99568992e22d300acd181a6d2c8de184

    SHA512

    e29b2e92c496245bed3372578074407e8ef8882906ce10c35b3c8deebfefe01b5fd7f3030acaa693e175f4b7aca6cd7d8d10ae1c731b09c5fa19035e005de3aa

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

    344B

    MD5

    97eda1fa6ec5b1a8714e0c79795fdbe3

    SHA1

    8d8f2c7a014332e4d4b88f49fcb6ba5774c941ff

    SHA256

    cfaa0cbca1db6d25b921bd947d97e54c207b062e5032fa1a96faabb15d85d015

    SHA512

    7528d0bf825e1c365aeced8ad9ef74ec755262a26b34acc0028f928af49da69f5debf45b6b31bd53f3a630619dc9d3f9b89f5936d6d9bde1c99dbd0be0a0121f

  • C:\Users\Admin\AppData\Local\Temp\Tar1D48.tmp
    Filesize

    177KB

    MD5

    435a9ac180383f9fa094131b173a2f7b

    SHA1

    76944ea657a9db94f9a4bef38f88c46ed4166983

    SHA256

    67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

    SHA512

    1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

  • \Users\Admin\AppData\Local\Temp\kat17A6.tmp
    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/1136-171-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/1136-13-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/1136-23-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/1136-17-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/1136-15-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/1136-11-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/1136-9-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/1136-250-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/1136-22-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/1136-18-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/1136-229-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/1136-214-0x000000001DFF0000-0x000000001E24F000-memory.dmp
    Filesize

    2.4MB

  • memory/1136-192-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2240-0-0x00000000001B0000-0x00000000001B1000-memory.dmp
    Filesize

    4KB

  • memory/2240-2-0x0000000003260000-0x00000000033A9000-memory.dmp
    Filesize

    1.3MB

  • memory/2240-20-0x0000000000400000-0x0000000000612000-memory.dmp
    Filesize

    2.1MB