Overview

overview

10

Static

static

10

8b4b233e87...le.exe

windows7_x64

10

8b4b233e87...le.exe

windows10_x64

7

Analysis

  • max time kernel
    118s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    26-07-2021 12:59

Sharing

Copy URL
Twitter E-mail
Report Analysis Logs

General

  • Target

    8b4b233e87c61c8698e086b376da640c9ab2ecd71c58b1f6a2eceb60b7e1a691.sample.exe

  • Size

    500KB

  • MD5

    dc82cd73d0738cfe2e49c499c2fa631e

  • SHA1

    81d1497490ee1ae20b2c87dff48cee31cdc4466f

  • SHA256

    8b4b233e87c61c8698e086b376da640c9ab2ecd71c58b1f6a2eceb60b7e1a691

  • SHA512

    6f67d86d4edb2ca0a31b2f206de7d1f6783124f30fedd527a2edf25efe6d885a5e64c8981dfbb91ab75dfa7213bc91465884ffb56747bb373911311c1c66f57d

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 8 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\8b4b233e87c61c8698e086b376da640c9ab2ecd71c58b1f6a2eceb60b7e1a691.sample.exe
    "C:\Users\Admin\AppData\Local\Temp\8b4b233e87c61c8698e086b376da640c9ab2ecd71c58b1f6a2eceb60b7e1a691.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:1052
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
      • Deletes itself
      PID:332

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

Loading Replay Monitor...

Downloads

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

    fcd7dac9dbe4c43d3a276bddc7ca5129

    SHA1

    6e3b8509a9f01aeb419fabd65391570248db4aae

    SHA256

    33d6292c22c8b4ea5a4dd64f9d89d51b7c959d2d4ce21df408ec50930227ce00

    SHA512

    fb4901a0f42c3a331a23ab25b6ce822e2eb68d195a7efcba01d6d71364c2c5d2d5c2a9cf515f36b298e4a2ef89e77b66ec798fa07e2e09edc6fde053637681fb

    Download Submit
  • memory/332-61-0x0000000000000000-mapping.dmp
    Download
  • memory/1052-60-0x0000000075721000-0x0000000075723000-memory.dmp
    Filesize

    8KB

    Download