quasar | 9f3064a561f1c6554ca816569553ccf751a9a22360184a53c9b32db66017dbca

General

Target

AIRVPNNNNNNNNNNNNNNNNNOSIRVEEEEEE.exe
Size

3.1MB
MD5

434bebcd54481549163ce6c29eefb0ed
SHA1

f0a643b353cd1d5c16ededbec902ab4e8462a5cc
SHA256

9f3064a561f1c6554ca816569553ccf751a9a22360184a53c9b32db66017dbca
SHA512

3dcc0ae35b3d210e04042a70b933c00ad9fcf41eee9938e1239fc93a12f16cb1641ce2ac454e9893239d1f45c6065c21e3400a544db6c4e873a9cde5e3cde403
SSDEEP

49152:bvyI22SsaNYfdPBldt698dBcjHt5vE1JV/oGdcTHHB72eh2NT:bvf22SsaNYfdPBldt6+dBcjHt5vS

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

204.8.98.75:4782

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

resource	yara_rule
behavioral1/memory/1736-1-0x00000000003E0000-0x0000000000704000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015415-6.dat	family_quasar
behavioral1/memory/1956-10-0x0000000000B80000-0x0000000000EA4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1956	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

pid	Process
2464	schtasks.exe
2804	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1736	AIRVPNNNNNNNNNNNNNNNNNOSIRVEEEEEE.exe
Token: SeDebugPrivilege	1956	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1956	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1736 wrote to memory of 2464	1736	AIRVPNNNNNNNNNNNNNNNNNOSIRVEEEEEE.exe	30
PID 1736 wrote to memory of 2464	1736	AIRVPNNNNNNNNNNNNNNNNNOSIRVEEEEEE.exe	30
PID 1736 wrote to memory of 2464	1736	AIRVPNNNNNNNNNNNNNNNNNOSIRVEEEEEE.exe	30
PID 1736 wrote to memory of 1956	1736	AIRVPNNNNNNNNNNNNNNNNNOSIRVEEEEEE.exe	32
PID 1736 wrote to memory of 1956	1736	AIRVPNNNNNNNNNNNNNNNNNOSIRVEEEEEE.exe	32
PID 1736 wrote to memory of 1956	1736	AIRVPNNNNNNNNNNNNNNNNNOSIRVEEEEEE.exe	32
PID 1956 wrote to memory of 2804	1956	Client.exe	33
PID 1956 wrote to memory of 2804	1956	Client.exe	33
PID 1956 wrote to memory of 2804	1956	Client.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\AIRVPNNNNNNNNNNNNNNNNNOSIRVEEEEEE.exe
"C:\Users\Admin\AppData\Local\Temp\AIRVPNNNNNNNNNNNNNNNNNOSIRVEEEEEE.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1736
- 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:2464
- 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:1956
- - 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:2804

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
434bebcd54481549163ce6c29eefb0ed

SHA1
f0a643b353cd1d5c16ededbec902ab4e8462a5cc

SHA256
9f3064a561f1c6554ca816569553ccf751a9a22360184a53c9b32db66017dbca

SHA512
3dcc0ae35b3d210e04042a70b933c00ad9fcf41eee9938e1239fc93a12f16cb1641ce2ac454e9893239d1f45c6065c21e3400a544db6c4e873a9cde5e3cde403

Download Submit
memory/1736-0-0x000007FEF5483000-0x000007FEF5484000-memory.dmp

Filesize
4KB

Download
memory/1736-1-0x00000000003E0000-0x0000000000704000-memory.dmp

Filesize
3.1MB

Download
memory/1736-2-0x000007FEF5480000-0x000007FEF5E6C000-memory.dmp

Filesize
9.9MB

Download
memory/1736-8-0x000007FEF5480000-0x000007FEF5E6C000-memory.dmp

Filesize
9.9MB

Download
memory/1956-9-0x000007FEF5480000-0x000007FEF5E6C000-memory.dmp

Filesize
9.9MB

Download
memory/1956-10-0x0000000000B80000-0x0000000000EA4000-memory.dmp

Filesize
3.1MB

Download
memory/1956-11-0x000007FEF5480000-0x000007FEF5E6C000-memory.dmp

Filesize
9.9MB

Download
memory/1956-12-0x000007FEF5480000-0x000007FEF5E6C000-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