quasar | 56e476ecef007b432c2e388802c7541762dae164ceea1b5342b59b4857d2dfac

Analysis

max time kernel
129s
max time network
143s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
28/11/2024, 13:43

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General

Target

FREEROBUX.exe
Size

3.1MB
MD5

3596db7936f5d66cecbe028d13a91bfc
SHA1

fba98fb2e56e9d729c94a982c6f48eb5aba8930a
SHA256

56e476ecef007b432c2e388802c7541762dae164ceea1b5342b59b4857d2dfac
SHA512

e74596a17e9e9db088292e67e06800098d52b1da6d0870d1239144005632aaebb3b25e7b43d02c481f536b0bdd2a0483fffc5bd55e396c9241c3a7f161340e76
SSDEEP

49152:7v+lL26AaNeWgPhlmVqvMQ7XSKhnn4gLoGd3lTHHB72eh2NT:7vuL26AaNeWgPhlmVqkQ7XSKhnnx

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.230:4782

192.168.1.233:4782

Mutex

e4595bcd-22f9-4826-8d7f-d752e4ca2275

Attributes

encryption_key
9209FE335E49520665B871E3C932A5C8D6821048
install_name
Setup.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

resource	yara_rule
behavioral1/memory/2592-1-0x0000000000830000-0x0000000000B54000-memory.dmp	family_quasar
behavioral1/files/0x0031000000018bbf-7.dat	family_quasar
behavioral1/memory/2948-10-0x0000000000BD0000-0x0000000000EF4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2948	Setup.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
2892	schtasks.exe
2756	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2592	FREEROBUX.exe
Token: SeDebugPrivilege	2948	Setup.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2948	Setup.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2592 wrote to memory of 2892	2592	FREEROBUX.exe	30
PID 2592 wrote to memory of 2892	2592	FREEROBUX.exe	30
PID 2592 wrote to memory of 2892	2592	FREEROBUX.exe	30
PID 2592 wrote to memory of 2948	2592	FREEROBUX.exe	32
PID 2592 wrote to memory of 2948	2592	FREEROBUX.exe	32
PID 2592 wrote to memory of 2948	2592	FREEROBUX.exe	32
PID 2948 wrote to memory of 2756	2948	Setup.exe	33
PID 2948 wrote to memory of 2756	2948	Setup.exe	33
PID 2948 wrote to memory of 2756	2948	Setup.exe	33

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\FREEROBUX.exe
"C:\Users\Admin\AppData\Local\Temp\FREEROBUX.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2592
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Setup.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2892
- C:\Users\Admin\AppData\Roaming\SubDir\Setup.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Setup.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2948
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Setup.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2756

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
3.1MB

MD5
3596db7936f5d66cecbe028d13a91bfc

SHA1
fba98fb2e56e9d729c94a982c6f48eb5aba8930a

SHA256
56e476ecef007b432c2e388802c7541762dae164ceea1b5342b59b4857d2dfac

SHA512
e74596a17e9e9db088292e67e06800098d52b1da6d0870d1239144005632aaebb3b25e7b43d02c481f536b0bdd2a0483fffc5bd55e396c9241c3a7f161340e76

Download Submit
memory/2592-0-0x000007FEF5B13000-0x000007FEF5B14000-memory.dmp

Filesize
4KB

Download
memory/2592-1-0x0000000000830000-0x0000000000B54000-memory.dmp

Filesize
3.1MB

Download
memory/2592-2-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/2592-9-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/2948-11-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/2948-10-0x0000000000BD0000-0x0000000000EF4000-memory.dmp

Filesize
3.1MB

Download
memory/2948-12-0x000007FEF5B10000-0x000007FEF64FC000-memory.dmp

Filesize
9.9MB

Download
memory/2948-13-0x000007FEF5B10000-0x000007FEF64FC000-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