quasar | 8a31693ddf8924f144ba19a8802766188bd13f1ed7eea7c226eb0e01a9e47685

General

Target

PORQUEPUTASYANOSIRVE.7z
Size

923KB
MD5

d757d40193d311216967491e36fc2ba4
SHA1

2dd90fa74c489da4f85bdf301053230b480a31fa
SHA256

8a31693ddf8924f144ba19a8802766188bd13f1ed7eea7c226eb0e01a9e47685
SHA512

9be26ab222457605eea0c42a4dbcfa80154cb384e6abf0db6a010fcca172a0eda8792b9e3fff9d67717f095f67448d9310c7e049f7fea8dd5907afe8bd462921
SSDEEP

24576:q9gl2kNvEE7GFdGqXsShFTAkBojKLUI56eGk:46vbIGqXscAkW+h1

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 2 IoCs

resource	yara_rule
behavioral1/files/0x00290000000450c0-2.dat	family_quasar
behavioral1/memory/4540-5-0x0000000000450000-0x0000000000774000-memory.dmp	family_quasar

Executes dropped EXE 3 IoCs

pid	Process
4540	PORQUEPUTASYANOSIRVE.exe
3572	Client.exe
2276	PORQUEPUTASYANOSIRVE.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

pid	Process
3724	schtasks.exe
5072	schtasks.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4352	7zFM.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeRestorePrivilege	4352	7zFM.exe
Token: 35	4352	7zFM.exe
Token: SeSecurityPrivilege	4352	7zFM.exe
Token: SeDebugPrivilege	4540	PORQUEPUTASYANOSIRVE.exe
Token: SeDebugPrivilege	3572	Client.exe
Token: SeDebugPrivilege	2276	PORQUEPUTASYANOSIRVE.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
4352	7zFM.exe
4352	7zFM.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3572	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4540 wrote to memory of 3724	4540	PORQUEPUTASYANOSIRVE.exe	84
PID 4540 wrote to memory of 3724	4540	PORQUEPUTASYANOSIRVE.exe	84
PID 4540 wrote to memory of 3572	4540	PORQUEPUTASYANOSIRVE.exe	86
PID 4540 wrote to memory of 3572	4540	PORQUEPUTASYANOSIRVE.exe	86
PID 3572 wrote to memory of 5072	3572	Client.exe	87
PID 3572 wrote to memory of 5072	3572	Client.exe	87

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:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\PORQUEPUTASYANOSIRVE.7z"
1⤵
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
PID:4352

C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe
"C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4540
- 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:3724
- 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:3572
- - 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:5072

C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe
"C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2276

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\Local\Microsoft\CLR_v4.0\UsageLogs\PORQUEPUTASYANOSIRVE.exe.log

Filesize
1KB

MD5
b08c36ce99a5ed11891ef6fc6d8647e9

SHA1
db95af417857221948eb1882e60f98ab2914bf1d

SHA256
cc9248a177495f45ec70b86c34fc5746c56730af36ace98ac7eb365dbafda674

SHA512
07e62581eace395b0a9699d727761648103180c21155d84ea09140f9e1c9690705c419118545aa67a564334bbde32710225fe3aa92b0b4b4210cb91f0058b1ea

Download Submit
C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe

Filesize
3.1MB

MD5
73565f33ed4d8741291cbb30409f1727

SHA1
4d3a54b28f3ea80f884a25905e27165bdc353109

SHA256
aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

SHA512
d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

Download Submit
memory/3572-10-0x0000000002EB0000-0x0000000002F00000-memory.dmp

Filesize
320KB

Download
memory/3572-11-0x000000001CCF0000-0x000000001CDA2000-memory.dmp

Filesize
712KB

Download
memory/3572-16-0x000000001BA50000-0x000000001BA62000-memory.dmp

Filesize
72KB

Download
memory/3572-17-0x000000001BBE0000-0x000000001BC1C000-memory.dmp

Filesize
240KB

Download
memory/4540-4-0x00007FFACDC13000-0x00007FFACDC15000-memory.dmp

Filesize
8KB

Download
memory/4540-5-0x0000000000450000-0x0000000000774000-memory.dmp

Filesize
3.1MB

Download
memory/4540-6-0x00007FFACDC10000-0x00007FFACE6D2000-memory.dmp

Filesize
10.8MB

Download
memory/4540-9-0x00007FFACDC10000-0x00007FFACE6D2000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads