quasar | cd6ab78b3ebf7f7f3997bf6fa5b94d36cc9340c2749da42b6fe0ca26021544f9

General

Target

Client-built.exe
Size

3.1MB
MD5

e231e7e16fa712910defa79ade814d98
SHA1

2a0e9c86ec93a113de72e04c9d0194cee4e9ebf2
SHA256

cd6ab78b3ebf7f7f3997bf6fa5b94d36cc9340c2749da42b6fe0ca26021544f9
SHA512

dd93fe753102b5876b6e2d93fe0124b9a917d0228f728efe3bf757593f907fe4427f857a0cbd71721ec214308e3cb94f1078e5b5443641571efb47577ce6995a
SSDEEP

49152:Pv3I22SsaNYfdPBldt698dBcjHYiRJ6pbR3LoGdkTHHB72eh2NT:Pv422SsaNYfdPBldt6+dBcjHYiRJ6r

Score

10^/10

quasar first spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

first

C2

37.225.64.186:4782

Mutex

44382739-6e8e-4a03-b838-6ed9f8f4bf36

Attributes

encryption_key
59DD70006F5E5424ACBA442199524AA9815F439E
install_name
Calculator.exe
log_directory
Logs
reconnect_delay
3000
startup_key
RtkAudUService86
subdirectory
Calculator_UWP

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/2948-1-0x0000000000C90000-0x0000000000FB4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000016eca-4.dat	family_quasar
behavioral1/memory/1792-7-0x0000000000DD0000-0x00000000010F4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1792	Calculator.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

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
1444	schtasks.exe
2712	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2948	Client-built.exe
Token: SeDebugPrivilege	1792	Calculator.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1792	Calculator.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1792	Calculator.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2948 wrote to memory of 1444	2948	Client-built.exe	31
PID 2948 wrote to memory of 1444	2948	Client-built.exe	31
PID 2948 wrote to memory of 1444	2948	Client-built.exe	31
PID 2948 wrote to memory of 1792	2948	Client-built.exe	33
PID 2948 wrote to memory of 1792	2948	Client-built.exe	33
PID 2948 wrote to memory of 1792	2948	Client-built.exe	33
PID 1792 wrote to memory of 2712	1792	Calculator.exe	34
PID 1792 wrote to memory of 2712	1792	Calculator.exe	34
PID 1792 wrote to memory of 2712	1792	Calculator.exe	34

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2948
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "RtkAudUService86" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1444
- C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe
  "C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:1792
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "RtkAudUService86" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2712

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Calculator_UWP\Calculator.exe

Filesize
3.1MB

MD5
e231e7e16fa712910defa79ade814d98

SHA1
2a0e9c86ec93a113de72e04c9d0194cee4e9ebf2

SHA256
cd6ab78b3ebf7f7f3997bf6fa5b94d36cc9340c2749da42b6fe0ca26021544f9

SHA512
dd93fe753102b5876b6e2d93fe0124b9a917d0228f728efe3bf757593f907fe4427f857a0cbd71721ec214308e3cb94f1078e5b5443641571efb47577ce6995a

Download Submit
memory/1792-7-0x0000000000DD0000-0x00000000010F4000-memory.dmp

Filesize
3.1MB

Download
memory/1792-8-0x000007FEF5E30000-0x000007FEF681C000-memory.dmp

Filesize
9.9MB

Download
memory/1792-10-0x000007FEF5E30000-0x000007FEF681C000-memory.dmp

Filesize
9.9MB

Download
memory/1792-11-0x000007FEF5E30000-0x000007FEF681C000-memory.dmp

Filesize
9.9MB

Download
memory/2948-0-0x000007FEF5E33000-0x000007FEF5E34000-memory.dmp

Filesize
4KB

Download
memory/2948-1-0x0000000000C90000-0x0000000000FB4000-memory.dmp

Filesize
3.1MB

Download
memory/2948-2-0x000007FEF5E30000-0x000007FEF681C000-memory.dmp

Filesize
9.9MB

Download
memory/2948-9-0x000007FEF5E30000-0x000007FEF681C000-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