quasar | cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56

General

Target

cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe
Size

3.1MB
MD5

2a036b0dd26406304870e4a5a5317720
SHA1

94801f96cb2dc6f0c4b236dd01d8c1c118670add
SHA256

cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56
SHA512

bc64ff4d7658d0223ff1f1291de72d051be6790487471219a28bf3199616dc3f9fbb576d6c06b146db7b3f20700339cd0650f5cc751e123d4c1535c8f6bcbbb0
SSDEEP

49152:6vrI22SsaNYfdPBldt698dBcjH5CE1JqLoGdPGOTHHB72eh2NT:6vU22SsaNYfdPBldt6+dBcjH5Cf+

Score

10^/10

quasar quasar spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Quasar

C2

192.168.1.56:4782

192.168.1.1:4782

Mutex

5fe19de3-1a9f-412b-a448-7cecf7917fc4

Attributes

encryption_key
2055CC40613B58490E3F6E74C60505765A925EAB
install_name
Quasar.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Settings
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/1624-1-0x0000000000F90000-0x00000000012B4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016621-7.dat	family_quasar
behavioral1/memory/1232-10-0x00000000001A0000-0x00000000004C4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1232	Quasar.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
2760	schtasks.exe
2184	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1624	cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe
Token: SeDebugPrivilege	1232	Quasar.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1232	Quasar.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1624 wrote to memory of 2760	1624	cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe	30
PID 1624 wrote to memory of 2760	1624	cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe	30
PID 1624 wrote to memory of 2760	1624	cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe	30
PID 1624 wrote to memory of 1232	1624	cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe	32
PID 1624 wrote to memory of 1232	1624	cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe	32
PID 1624 wrote to memory of 1232	1624	cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe	32
PID 1232 wrote to memory of 2184	1232	Quasar.exe	33
PID 1232 wrote to memory of 2184	1232	Quasar.exe	33
PID 1232 wrote to memory of 2184	1232	Quasar.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\cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe
"C:\Users\Admin\AppData\Local\Temp\cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1624
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Settings" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Quasar.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2760
- C:\Users\Admin\AppData\Roaming\SubDir\Quasar.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Quasar.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1232
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Settings" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Quasar.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2184

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\Quasar.exe

Filesize
3.1MB

MD5
2a036b0dd26406304870e4a5a5317720

SHA1
94801f96cb2dc6f0c4b236dd01d8c1c118670add

SHA256
cbbf746f0b8dd266ac933cb4e073b505721d5369c290e4a137a357281aea8d56

SHA512
bc64ff4d7658d0223ff1f1291de72d051be6790487471219a28bf3199616dc3f9fbb576d6c06b146db7b3f20700339cd0650f5cc751e123d4c1535c8f6bcbbb0

Download Submit
memory/1232-10-0x00000000001A0000-0x00000000004C4000-memory.dmp

Filesize
3.1MB

Download
memory/1232-9-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/1232-11-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/1232-12-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/1624-0-0x000007FEF5AB3000-0x000007FEF5AB4000-memory.dmp

Filesize
4KB

Download
memory/1624-1-0x0000000000F90000-0x00000000012B4000-memory.dmp

Filesize
3.1MB

Download
memory/1624-2-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/1624-8-0x000007FEF5AB0000-0x000007FEF649C000-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