Overview

overview

10

Static

static

10

0433efd9ba...le.exe

windows7_x64

10

0433efd9ba...le.exe

windows10_x64

10

Analysis

  • max time kernel
    121s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    17-12-2021 10:40

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General

  • Target

    0433efd9ba06378eb6eae864c85aafc8b6de79ef6512345294e9e379cc054c3d.bin.sample.exe

  • Size

    500KB

  • MD5

    0e20d8b10b555b3bc2711bb878a02cab

  • SHA1

    598da6d3ac08e21c39807fffabd2f597edb4cbb8

  • SHA256

    0433efd9ba06378eb6eae864c85aafc8b6de79ef6512345294e9e379cc054c3d

  • SHA512

    442ab7bbec38a1b69261b8266e16001e1d8ae49297b95f72508bc41a18ebd822b9fa36caf1a4195dae8333becd072bb0cc4588ed3068a4cd4848d90a403b1c27

Score
10/10
mespinozaransomwarespywarestealer

Malware Config

Signatures

  • Mespinoza Ransomware 2 TTPs

    Also known as Pysa. Ransomware-as-a-servoce which first appeared in 2020.

    ransomwaremespinoza
  • Modifies extensions of user files 10 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Deletes itself 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious use of WriteProcessMemory 7 IoCs
  • System policy modification 1 TTPs 2 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\0433efd9ba06378eb6eae864c85aafc8b6de79ef6512345294e9e379cc054c3d.bin.sample.exe
    "C:\Users\Admin\AppData\Local\Temp\0433efd9ba06378eb6eae864c85aafc8b6de79ef6512345294e9e379cc054c3d.bin.sample.exe"
    1⤵
    • Modifies extensions of user files
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1668
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
      • Deletes itself
      PID:2036

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

System Information Discovery

1
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Exfiltration

Command and Control

Impact

Data Encrypted for Impact

1
T1486

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\update.bat
    MD5

    0aa9034f207bc94dc292a7fe02c7d2bb

    SHA1

    4dc1b49d91fa62dd6e5c91dbe2e117dcb1c8f61a

    SHA256

    eb17fd9d48200f67714f3f95e5f8315eb85bb5c49e1266c01bafaf413588898e

    SHA512

    ba9f57ce9a290f7fcedf3892ae3c73a9283c225426e9bb87b56ee6fb0fa29604e80d0b7ff82cf4344ae790f2e293f5d385541456f889dd6da27a3d6955786900

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  • memory/1668-54-0x00000000762C1000-0x00000000762C3000-memory.dmp
    Filesize

    8KB

    Download
  • memory/2036-55-0x0000000000000000-mapping.dmp
    Download