Analysis

  • max time kernel
    120s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    27-05-2024 03:12

General

  • Target

    d698f4a95e8e4906e2ac061839316a6f45a713944952db9b61bdd9b64222961f.exe

  • Size

    2.0MB

  • MD5

    8122eccc7f6626465aea3665bc561514

  • SHA1

    c2037dd299d568296da48c942ff9bec63332ea5b

  • SHA256

    d698f4a95e8e4906e2ac061839316a6f45a713944952db9b61bdd9b64222961f

  • SHA512

    2faf1534e65673cee0a0d4f9f43050112305bb9f6ba3a1ea3c5af7f9e36250129180d3e89be984fcaa24d2cdf0354a12cf7b84fa783772964a7266ca66c5aaa0

  • SSDEEP

    49152:s4K3x1vUmJtTF+TxMoxc1TU+j+dAzGwlrh:s4Ex18mtIuoITsdZ

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 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d698f4a95e8e4906e2ac061839316a6f45a713944952db9b61bdd9b64222961f.exe
    "C:\Users\Admin\AppData\Local\Temp\d698f4a95e8e4906e2ac061839316a6f45a713944952db9b61bdd9b64222961f.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2660
    • C:\Users\Admin\AppData\Local\Temp\kat7C61.tmp
      C:\Users\Admin\AppData\Local\Temp\kat7C61.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:2912

Network

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Modify Registry

1
T1112

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

2
T1012

System Information Discovery

1
T1082

Collection

Data from Local System

1
T1005

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

    b5688bfbc1d5102950978dfecd61da75

    SHA1

    9d8f7676604ce7d442363f6a55af52fd8ffdb29f

    SHA256

    c2657d632a7df61950f5c9c1d252425e6602ae3caa3ae97e876c2536da647aee

    SHA512

    8de749eb55dd4089f12535a591d62f532937dfebd8620df3da09d8afdf5574c0fe305f0734e48d38d7f4e6ca4764c962da3e64883b4dbb4688a93454f74538a4

  • C:\Users\Admin\AppData\Local\Temp\Tar8740.tmp
    Filesize

    177KB

    MD5

    435a9ac180383f9fa094131b173a2f7b

    SHA1

    76944ea657a9db94f9a4bef38f88c46ed4166983

    SHA256

    67dc37ed50b8e63272b49a254a6039ee225974f1d767bb83eb1fd80e759a7c34

    SHA512

    1a6b277611959720a9c71114957620517ad94541302f164eb872bd322292a952409bafb8bc2ac793b16ad5f25d83f8594ccff2b7834e3c2b2b941e6fc84c009a

  • \Users\Admin\AppData\Local\Temp\kat7C61.tmp
    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/2660-19-0x0000000000400000-0x000000000060C000-memory.dmp
    Filesize

    2.0MB

  • memory/2660-1-0x0000000002E80000-0x0000000002FC9000-memory.dmp
    Filesize

    1.3MB

  • memory/2660-0-0x0000000000220000-0x0000000000221000-memory.dmp
    Filesize

    4KB

  • memory/2912-11-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2912-13-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2912-18-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2912-15-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2912-22-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2912-23-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2912-17-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2912-9-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2912-171-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2912-192-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2912-214-0x000000001DC50000-0x000000001DEAF000-memory.dmp
    Filesize

    2.4MB

  • memory/2912-229-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB

  • memory/2912-250-0x0000000000400000-0x0000000000646000-memory.dmp
    Filesize

    2.3MB