Overview

overview

10

Static

static

049263e712...6c.exe

windows7_x64

10

049263e712...6c.exe

windows10_x64

10

2a2eb971b8...d0.exe

windows7_x64

10

2a2eb971b8...d0.exe

windows10_x64

10

32d6be4f86...f3.exe

windows7_x64

10

32d6be4f86...f3.exe

windows10_x64

10

39ef1d9afd...d8.exe

windows7_x64

10

39ef1d9afd...d8.exe

windows10_x64

10

3a83805e3a...7e.exe

windows7_x64

10

3a83805e3a...7e.exe

windows10_x64

10

d1b6ee9b71...2b.exe

windows7_x64

10

d1b6ee9b71...2b.exe

windows10_x64

10

Analysis

  • max time kernel
    120s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    16-06-2021 05:59

Sharing

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General

  • Target

    39ef1d9afd248791d765f0deaed6ebaac5416876a705e407cc97a35dad038fd8.exe

  • Size

    501KB

  • MD5

    0189bc03d7c37649bd3a9d41884de2b8

  • SHA1

    750c2c2457dc45e7f9de54fc6a340a87a15ede17

  • SHA256

    39ef1d9afd248791d765f0deaed6ebaac5416876a705e407cc97a35dad038fd8

  • SHA512

    8c1e8ccfe40e9b2b931f9e3f013b2dbef076e8d0eb9cbdfd017dd0b7d919d41bb934315f02c434ef99e0c68ec44ab712dfee26fe3260b8e3ba3d9c458bb5e6b6

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\39ef1d9afd248791d765f0deaed6ebaac5416876a705e407cc97a35dad038fd8.exe
    "C:\Users\Admin\AppData\Local\Temp\39ef1d9afd248791d765f0deaed6ebaac5416876a705e407cc97a35dad038fd8.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:1688
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
      • Deletes itself
      PID:1988

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

    c5fd73beacaa9d9fa1360f11a8cf052f

    SHA1

    4cf4cf25f5a68fd7b193ce6ef254b981393f95bc

    SHA256

    59e624400f55e0f7f33c0da33f0617d49c4fbb82e72389f18d4321461e47f566

    SHA512

    673a1cb8bcf17ed6783e63a0dbb2ebd41fc5b5ce19ca29065b15952378868eed36f208196101d89c0603c943e99cb41bf1035d7b5deba64ee2ee242351c11ab0

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  • memory/1688-60-0x0000000075011000-0x0000000075013000-memory.dmp
    Filesize

    8KB

    Download
  • memory/1988-61-0x0000000000000000-mapping.dmp
    Download