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
    35s
  • max time network
    55s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    16-06-2021 05:59

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General

  • Target

    3a83805e3ad41c6acd7931a0902b519669b8f38e491357c6f31fa46509f3c77e.exe

  • Size

    500KB

  • MD5

    3c1ab60250969d76910badaadd740858

  • SHA1

    f2dda64bf3d8758f144b971443d5262500faf939

  • SHA256

    3a83805e3ad41c6acd7931a0902b519669b8f38e491357c6f31fa46509f3c77e

  • SHA512

    a9ecfc5e941471e99002944c035765e9c9b0b4da7eba21bba96c82b2c8ea1696940286a802577c109b08e63bd4abe1cc313180534ce151101b731e1334811a4d

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 4 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\3a83805e3ad41c6acd7931a0902b519669b8f38e491357c6f31fa46509f3c77e.exe
    "C:\Users\Admin\AppData\Local\Temp\3a83805e3ad41c6acd7931a0902b519669b8f38e491357c6f31fa46509f3c77e.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:1980
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
      • Deletes itself
      PID:1836

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

    ea23b74ffd1e3979ff573dd7a54f2473

    SHA1

    3c848cbbd3b79afabe2941fd4a9ad9c4e37133bc

    SHA256

    e7b12567e1e3e4a0ecd66c5d829aa04055e7ec5dc88dd6bec4b45e2d9dea15f4

    SHA512

    8707bf425244700b3668938dd866456b23c8c617908c5b03347078917338e0cd1ef4b17f7e202c00c9eb1ee301cd3339da0a0ba423a61c54abefaa5c200aea72

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  • memory/1836-60-0x0000000000000000-mapping.dmp
    Download
  • memory/1980-59-0x0000000076A01000-0x0000000076A03000-memory.dmp
    Filesize

    8KB

    Download