Overview

overview

8

Static

static

cpcrs.exe

windows7_x64

8

cpcrs.exe

windows10-2004_x64

8

csrss.exe

windows7_x64

1

csrss.exe

windows10-2004_x64

1

Analysis

  • max time kernel
    4294120s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20220311-en
  • submitted
    22-03-2022 12:16

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General

  • Target

    cpcrs.exe

  • Size

    419KB

  • MD5

    7d20fa01a703afa8907e50417d27b0a4

  • SHA1

    320116162d78afb8e00fd972591479a899d3dfee

  • SHA256

    3b2e708eaa4744c76a633391cf2c983f4a098b46436525619e5ea44e105355fe

  • SHA512

    0dcebe2598e6ccb51f0609831c93071421049eb924f83871e95c5a280af0d2e76630dfc47c5a2780eb18d55ee9690d6c83aabd8f1043cc2cdc21d9fe5425b892

Score
8/10
persistenceransomwarespywarestealer

Malware Config

Signatures

  • Drops file in Drivers directory 64 IoCs
  • Modifies Installed Components in the registry 2 TTPs
    persistence
  • Modifies extensions of user files 2 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Drops desktop.ini file(s) 64 IoCs
  • Maps connected drives based on registry 3 TTPs 4 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Drops file in Windows directory 64 IoCs
  • Modifies Control Panel 64 IoCs
    evasion
  • Modifies Internet Explorer settings 1 TTPs 64 IoCs
    adwarespyware
  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies system certificate store 2 TTPs 1 IoCs
    evasionspywaretrojan
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\cpcrs.exe
    "C:\Users\Admin\AppData\Local\Temp\cpcrs.exe"
    1⤵
    • Drops file in Drivers directory
    • Modifies extensions of user files
    • Drops desktop.ini file(s)
    • Maps connected drives based on registry
    • Drops file in Windows directory
    • Modifies Control Panel
    • Modifies Internet Explorer settings
    • Modifies data under HKEY_USERS
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:1968

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

Defense Evasion

Modify Registry

3
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

1
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

1
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

  • memory/1968-54-0x00000000001D0000-0x000000000023E000-memory.dmp
    Filesize

    440KB

    Download
  • memory/1968-55-0x000007FEF5BD0000-0x000007FEF65BC000-memory.dmp
    Filesize

    9.9MB

    Download
  • memory/1968-56-0x000000001AB00000-0x000000001AB02000-memory.dmp
    Filesize

    8KB

    Download