Overview

overview

10

Static

static

10

44f1def68a...in.exe

windows7_x64

10

44f1def68a...in.exe

windows10_x64

10

Analysis

  • max time kernel
    122s
  • max time network
    126s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    24-12-2021 11:15

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General

  • Target

    44f1def68aef34687bfacf3668e56873f9d603fc6741d5da1209cc55bdc6f1f9.bin.exe

  • Size

    500KB

  • MD5

    6db85bacef3cac6deb69911af522e2b7

  • SHA1

    6aa7b2744a7e3975f0dff3672ec633b687ef5fbd

  • SHA256

    44f1def68aef34687bfacf3668e56873f9d603fc6741d5da1209cc55bdc6f1f9

  • SHA512

    7fbeb7cd7c09eb758e7dbbbe388e742a4d4a5e2933edcc3c0d57d4225918a5b9ac8259ebfcd71ae588e3b459aa5fa2ad8efad635ebc86f271cae7d272e1f8361

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 14 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\44f1def68aef34687bfacf3668e56873f9d603fc6741d5da1209cc55bdc6f1f9.bin.exe
    "C:\Users\Admin\AppData\Local\Temp\44f1def68aef34687bfacf3668e56873f9d603fc6741d5da1209cc55bdc6f1f9.bin.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:964
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
      • Deletes itself
      PID:1324

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

    1c0051dedef4e7e9065aba98578dad71

    SHA1

    e6b5482d4e7fa428c62caa5b6b802472e9fa98fe

    SHA256

    5a0c57550848a5f46df98ce51939b753e849762070f186a9c25dc7a852045132

    SHA512

    d729b22a68ab1711fd807d735b5dc6fb848206c6f7882b86b6611f112d35fb283142b9168bde7bbc0ef7aad6cc150e47edef3974857d2e0a3e4155a469896b7c

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  • memory/964-54-0x0000000075601000-0x0000000075603000-memory.dmp
    Filesize

    8KB

    Download
  • memory/1324-55-0x0000000000000000-mapping.dmp
    Download