Overview

overview

10

Static

static

8

99a2af2b1d...3.xlsm

windows7-x64

10

99a2af2b1d...3.xlsm

windows10-2004-x64

10

Sharing

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General

  • Target

    99a2af2b1d39d3ca267095cc733dd5e285b40b9c6b1709d34dbb213387c8df93.zip

  • Size

    39KB

  • Sample

    230321-qnrz9aad69

  • MD5

    0ed91969de854f71d6d2752bac851a08

  • SHA1

    e5c0a7478f3f2184e9e5dcc179264ac6c9acb962

  • SHA256

    844b8fb8321d71afa34e37980c113ba01b2f5afe86b751e17f7f1f06fd0fa8ad

  • SHA512

    89ce0dec98e8934f2a2e7623016499ac43ac658fa021dc6477848da28a1e23f49c1f24c9737acc3936157b11e94e66a9a31fbd3df284aecf15f8e8c46f2fd878

  • SSDEEP

    768:6UN7XgStxWQgOJA3YeGNb7C9ybqHwJGwNTHAl3J3lp2:37v3vA3YeuCQJGw45O

Score
10/10
quasarsuccessmacropersistencespywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

SUCCESS

C2

41.185.97.216:4782

Mutex

MUTEX_QAxMFzrXWG2cbIHPGK

Attributes
  • encryption_key

    4DwUV8AnxPgmXSMeThKb

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    cmd

  • subdirectory

    SubDir

Targets

    • Target

      99a2af2b1d39d3ca267095cc733dd5e285b40b9c6b1709d34dbb213387c8df93.xlsm

    • Size

      42KB

    • MD5

      edef1e97fcca56228c1956db6b514f55

    • SHA1

      00d1bb1cf96aee9a21508b23f6ac113153131b1c

    • SHA256

      99a2af2b1d39d3ca267095cc733dd5e285b40b9c6b1709d34dbb213387c8df93

    • SHA512

      ba718485a68b2a9f5c134e186309dae1d169c22fcc15a4d028121df564fd64a9805e3d31a7edf82279b371c883721dc4d8accc2a3fe02ab3b841cd184b7aa236

    • SSDEEP

      768:WrvDK4vwssnjS7zWl2BIJYfTH+niSpwvDHvDv+nWfFFiKk/f1qtfHF7RT+nsFf:ivXvwTjSul2G1BoTvDv+0FFi3/dqJl7Z

    Score
    10/10
    quasarsuccesspersistencespywaretrojan

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

3
T1012

System Information Discovery

4
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks