Overview

overview

10

Static

static

75c8e93ffc...db.exe

windows7_x64

10

75c8e93ffc...db.exe

windows10_x64

10

Analysis

  • max time kernel
    35s
  • max time network
    38s
  • platform
    windows7_x64
  • resource
    win7v20201028
  • submitted
    08-04-2021 04:29

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General

  • Target

    75c8e93ffcfd84f0d3444c0b9fc8c9a462f91540c8760025c393a749d198d9db.exe

  • Size

    500KB

  • MD5

    ba93f5b8f6beb7797cccf6e7a9370ccd

  • SHA1

    94a351849632c435f6809eda080f52e6d0ad1195

  • SHA256

    75c8e93ffcfd84f0d3444c0b9fc8c9a462f91540c8760025c393a749d198d9db

  • SHA512

    aaba4759f720fe5c82c801eefafe30abc9224cd0cc38549ca91c11a0948724147c4803184e1320dbaa3e10ea8e26a6ee146e2f70e2cdefd8ec18981d17455416

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\75c8e93ffcfd84f0d3444c0b9fc8c9a462f91540c8760025c393a749d198d9db.exe
    "C:\Users\Admin\AppData\Local\Temp\75c8e93ffcfd84f0d3444c0b9fc8c9a462f91540c8760025c393a749d198d9db.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:1684
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\update.bat" "
      2⤵
      • Deletes itself
      PID:1520

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

    0baa1a77102650d986b39bc1924f50b5

    SHA1

    943e2afed79ced0643ebbaa6f329fce248d23f63

    SHA256

    7f0578c03453c68c3e7bd1712ecfda24431e6a192485f9a5dd22e13355b7d2ae

    SHA512

    dd228f34dfd0b374186093b70ff9188dee7ff68e224bb090624ca1f0aa5b0e617dda49c31b84e66d9d43626b5c35e5165921863d5ba39a75564c431cc1273082

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  • memory/1520-3-0x0000000000000000-mapping.dmp
    Download
  • memory/1684-2-0x00000000756A1000-0x00000000756A3000-memory.dmp
    Filesize

    8KB

    Download