Overview

overview

8

Static

static

5

zxcrAretard.x86_64

ubuntu-18.04-amd64

8

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General

  • Target
    zxcrAretard.x86_64
  • Size 3.7MB
  • Sample260709-pg3mqsh16r
  • SHA256 f12c6b938993cd6dc4a793c209aabe140202164615acd82eec7a11ff390bc071
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
credential_accessdefense_evasiondiscoveryexecutionlinuxpersistenceprivilege_escalationupx

Malware Config

Targets

    • Target
      zxcrAretard.x86_64
    • Size 3.7MB
    • SHA256 f12c6b938993cd6dc4a793c209aabe140202164615acd82eec7a11ff390bc071
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    8/10
    credential_accessdefense_evasiondiscoveryexecutionpersistenceprivilege_escalation

    • Modifies password files for system users/ groups

      Modifies files storing password hashes of existing users/ groups, likely to grant additional privileges.

      persistencecredential_accessdefense_evasion

    • Deletes Audit logs

      Deletes logs related to the Linux Audit framework.

      defense_evasion

    • Deletes itself

    • Deletes journal logs

      Deletes systemd journal logs. Likely to evade detection.

      defense_evasion

    • Deletes system logs

      Deletes log file which contains global system messages. Adversaries may delete system logs to minimize their footprint.

      defense_evasion

    • OS Credential Dumping

      Adversaries may attempt to dump credentials to use it in password cracking.

      credential_access

    • Abuse Elevation Control Mechanism: Sudo and Sudo Caching

      Abuse sudo or cached sudo credentials to execute code.

      privilege_escalationdefense_evasion

    • Reads AppArmor ptrace settings

      Discovery of allowed ptrace capabilities by AppArmor.

      discovery

    • Adds a user to the system

    • Creates/modifies environment variables

      Creating/modifying environment variables is a common persistence mechanism.

      persistenceprivilege_escalationdefense_evasion

    • Deletes log files

      Deletes log files on the system.

      defense_evasion

    • Enumerates running processes

      Discovers information about currently running processes on the system

    • Modifies Bash startup script

      persistence
    behavioral1

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

User Execution

2
T1204

Malicious File

1
T1204.002

Persistence

Boot or Logon Autostart Execution

1
T1547

Event Triggered Execution

1
T1546

Unix Shell Configuration Modification

1
T1546.004

Hijack Execution Flow

1
T1574

Path Interception by PATH Environment Variable

1
T1574.007

Modify Authentication Process

1
T1556

Pluggable Authentication Modules

1
T1556.003

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Sudo and Sudo Caching

1
T1548.003

Boot or Logon Autostart Execution

1
T1547

Event Triggered Execution

1
T1546

Unix Shell Configuration Modification

1
T1546.004

Hijack Execution Flow

1
T1574

Path Interception by PATH Environment Variable

1
T1574.007

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Sudo and Sudo Caching

1
T1548.003

Hijack Execution Flow

1
T1574

Path Interception by PATH Environment Variable

1
T1574.007

Indicator Removal

4
T1070

Clear Linux or Mac System Logs

4
T1070.002

Modify Authentication Process

1
T1556

Pluggable Authentication Modules

1
T1556.003

Credential Access

Modify Authentication Process

1
T1556

Pluggable Authentication Modules

1
T1556.003

OS Credential Dumping

1
T1003

/etc/passwd and /etc/shadow

1
T1003.008

Discovery

System Information Discovery

2
T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks