Overview

overview

10

Static

static

10

Client-built.exe

windows7-x64

10

Client-built.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • Sample

    240623-rvpzxaxhkm

  • MD5

    e010924db36ba5093382221cdf0c89df

  • SHA1

    09e2ab5a296e5500001cee9481b8a066b1f400e5

  • SHA256

    a72f77cddbd993e606115287c8806adbd6b08e3217a6c6ea9a8f31fdca56c317

  • SHA512

    1c3bf5fd4a36438376416ba7c7758929403a74d37805ff283aede3586bbd2e4aa2b41bc5aa9e79523e1940bdeafcb60d15c74a88d7de82a5f21dbd507591a0f0

  • SSDEEP

    49152:3vHI22SsaNYfdPBldt698dBcjHDJSC1J6loGdsTHHB72eh2NT:3vo22SsaNYfdPBldt6+dBcjHDJSv

Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.26.243:4782

Mutex

51d612b2-dcb5-4477-9ee7-748df2f891d3

Attributes
  • encryption_key

    D7CE15708C398D1F0A3B43032DE529C00B9A8B5F

  • install_name

    windowsupdater.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    msedge.exe

  • subdirectory

    Win64

Targets

    • Target

      Client-built.exe

    • Size

      3.1MB

    • MD5

      e010924db36ba5093382221cdf0c89df

    • SHA1

      09e2ab5a296e5500001cee9481b8a066b1f400e5

    • SHA256

      a72f77cddbd993e606115287c8806adbd6b08e3217a6c6ea9a8f31fdca56c317

    • SHA512

      1c3bf5fd4a36438376416ba7c7758929403a74d37805ff283aede3586bbd2e4aa2b41bc5aa9e79523e1940bdeafcb60d15c74a88d7de82a5f21dbd507591a0f0

    • SSDEEP

      49152:3vHI22SsaNYfdPBldt698dBcjHDJSC1J6loGdsTHHB72eh2NT:3vo22SsaNYfdPBldt6+dBcjHDJSv

    Score
    10/10
    quasaroffice04spywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Executes dropped EXE

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

1
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks