quasar | 41dcaf4c90164544df7f6355059f9d31534a72ddcd310729332ef1af1e304a29

Analysis

max time kernel
136s
max time network
168s
platform
windows10-2004_x64
resource
win10v2004-en-20220113
submitted
19-03-2022 13:18

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General

Target

The increasingly complicated Russia-Ukraine crisis explained.pdf.exe
Size

713KB
MD5

19338d49c7f6a98163ed63ca165a6d9d
SHA1

bbb9bf63efc448706f974050bef23bb1edd13782
SHA256

b4e3216803e2ec15ff0df82bf47656df179a4efa977eb187607bab0c38909a00
SHA512

b8c9235a9a825284dcd3bf5c210f1f842e90639c4459ae1728e2e96aa738a9f8fdf7a119cc2d4e92a5400870644c571278f0f33679d7b398d399c981c8a6fa31

Score

10^/10

quasar pdf spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

PDF

https://web.sunvn.net:4782

https://taisunwin.club:4782

https://web.sunwinvn.vip:4782

http://b29.bet:4782

https://playgo88.fun:4782

https://choigo88.us:4782

Mutex

ca1a9340-65d7-49a9-b045-50c69210b55d

Attributes

encryption_key
9C84151BA76B2D40C2A4C55E8D137720CE7C0137
install_name
PDF.exe
log_directory
Logs
reconnect_delay
3000
startup_key
PDF Reader
subdirectory
PDF Reader

Signatures

Quasar Payload 1 IoCs

Processes:

resource	yara_rule
behavioral4/memory/2000-130-0x0000000000F80000-0x0000000001038000-memory.dmp	family_quasar

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

Drops file in Program Files directory 2 IoCs

Processes:

The increasingly complicated Russia-Ukraine crisis explained.pdf.exe

description	ioc	process
File created	C:\Program Files\PDF Reader\PDF.exe	The increasingly complicated Russia-Ukraine crisis explained.pdf.exe
File opened for modification	C:\Program Files\PDF Reader\PDF.exe	The increasingly complicated Russia-Ukraine crisis explained.pdf.exe

Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1356 schtasks.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

The increasingly complicated Russia-Ukraine crisis explained.pdf.exe

description pid process

Token: SeDebugPrivilege 2000 The increasingly complicated Russia-Ukraine crisis explained.pdf.exe

pid	process
1356	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2000	The increasingly complicated Russia-Ukraine crisis explained.pdf.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

The increasingly complicated Russia-Ukraine crisis explained.pdf.exe

description	pid	process	target process
PID 2000 wrote to memory of 1356	2000	The increasingly complicated Russia-Ukraine crisis explained.pdf.exe	schtasks.exe
PID 2000 wrote to memory of 1356	2000	The increasingly complicated Russia-Ukraine crisis explained.pdf.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\The increasingly complicated Russia-Ukraine crisis explained.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\The increasingly complicated Russia-Ukraine crisis explained.pdf.exe"
1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2000

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "PDF Reader" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\The increasingly complicated Russia-Ukraine crisis explained.pdf.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1356

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/2000-130-0x0000000000F80000-0x0000000001038000-memory.dmp

Filesize
736KB

Download
memory/2000-132-0x000000001D210000-0x000000001D212000-memory.dmp

Filesize
8KB

Download
memory/2000-131-0x00007FF8F9B20000-0x00007FF8FA5E1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads