quasar | aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

General

Target

PORQUEPUTASYANOSIRVE.exe
Size

3.1MB
MD5

73565f33ed4d8741291cbb30409f1727
SHA1

4d3a54b28f3ea80f884a25905e27165bdc353109
SHA256

aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de
SHA512

d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583
SSDEEP

49152:uvyI22SsaNYfdPBldt698dBcjHdtRJ6CbR3LoGd7THHB72eh2NT:uvf22SsaNYfdPBldt6+dBcjHdtRJ68

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

azxq0ap.localto.net:3425

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes

encryption_key
AEA258EF65BF1786F0F767C0BE2497ECC304C46F
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2528-1-0x00000000011C0000-0x00000000014E4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar
behavioral1/memory/2496-10-0x0000000000A90000-0x0000000000DB4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

2496 Client.exe
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exeschtasks.exe

pid process

2316 schtasks.exe
1576 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

PORQUEPUTASYANOSIRVE.exeClient.exe

description pid process

Token: SeDebugPrivilege 2528 PORQUEPUTASYANOSIRVE.exe
Token: SeDebugPrivilege 2496 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

2496 Client.exe

pid	process
2496	Client.exe

pid	process
2316	schtasks.exe
1576	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2528	PORQUEPUTASYANOSIRVE.exe
Token: SeDebugPrivilege	2496	Client.exe

pid	process
2496	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

PORQUEPUTASYANOSIRVE.exeClient.exe

description	pid	process	target process
PID 2528 wrote to memory of 1576	2528	PORQUEPUTASYANOSIRVE.exe	schtasks.exe
PID 2528 wrote to memory of 1576	2528	PORQUEPUTASYANOSIRVE.exe	schtasks.exe
PID 2528 wrote to memory of 1576	2528	PORQUEPUTASYANOSIRVE.exe	schtasks.exe
PID 2528 wrote to memory of 2496	2528	PORQUEPUTASYANOSIRVE.exe	Client.exe
PID 2528 wrote to memory of 2496	2528	PORQUEPUTASYANOSIRVE.exe	Client.exe
PID 2528 wrote to memory of 2496	2528	PORQUEPUTASYANOSIRVE.exe	Client.exe
PID 2496 wrote to memory of 2316	2496	Client.exe	schtasks.exe
PID 2496 wrote to memory of 2316	2496	Client.exe	schtasks.exe
PID 2496 wrote to memory of 2316	2496	Client.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\PORQUEPUTASYANOSIRVE.exe
"C:\Users\Admin\AppData\Local\Temp\PORQUEPUTASYANOSIRVE.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2528
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1576
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2496
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2316

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
73565f33ed4d8741291cbb30409f1727

SHA1
4d3a54b28f3ea80f884a25905e27165bdc353109

SHA256
aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

SHA512
d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

Download Submit
memory/2496-10-0x0000000000A90000-0x0000000000DB4000-memory.dmp

Filesize
3.1MB

Download
memory/2496-9-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/2496-11-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/2496-12-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/2528-0-0x000007FEF5B63000-0x000007FEF5B64000-memory.dmp

Filesize
4KB

Download
memory/2528-1-0x00000000011C0000-0x00000000014E4000-memory.dmp

Filesize
3.1MB

Download
memory/2528-2-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download
memory/2528-8-0x000007FEF5B60000-0x000007FEF654C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads