quasar | cd6ab78b3ebf7f7f3997bf6fa5b94d36cc9340c2749da42b6fe0ca26021544f9

Analysis

max time kernel
132s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
01-01-2025 23:09

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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

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 2 IoCs

resource	yara_rule
behavioral2/memory/3308-1-0x00000000009B0000-0x0000000000CD4000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b96-4.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4748	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
5088	schtasks.exe
2100	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3308	Client-built.exe
Token: SeDebugPrivilege	4748	Calculator.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4748	Calculator.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4748	Calculator.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3308 wrote to memory of 5088	3308	Client-built.exe	84
PID 3308 wrote to memory of 5088	3308	Client-built.exe	84
PID 3308 wrote to memory of 4748	3308	Client-built.exe	86
PID 3308 wrote to memory of 4748	3308	Client-built.exe	86
PID 4748 wrote to memory of 2100	4748	Calculator.exe	87
PID 4748 wrote to memory of 2100	4748	Calculator.exe	87

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:3308
- 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:5088
- 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:4748
- - 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:2100

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

System Information Discovery

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/3308-0-0x00007FF80F383000-0x00007FF80F385000-memory.dmp

Filesize
8KB

Download
memory/3308-1-0x00000000009B0000-0x0000000000CD4000-memory.dmp

Filesize
3.1MB

Download
memory/3308-2-0x00007FF80F380000-0x00007FF80FE41000-memory.dmp

Filesize
10.8MB

Download
memory/3308-8-0x00007FF80F380000-0x00007FF80FE41000-memory.dmp

Filesize
10.8MB

Download
memory/4748-9-0x00007FF80F380000-0x00007FF80FE41000-memory.dmp

Filesize
10.8MB

Download
memory/4748-10-0x00007FF80F380000-0x00007FF80FE41000-memory.dmp

Filesize
10.8MB

Download
memory/4748-11-0x000000001DFD0000-0x000000001E020000-memory.dmp

Filesize
320KB

Download
memory/4748-12-0x000000001E0E0000-0x000000001E192000-memory.dmp

Filesize
712KB

Download
memory/4748-13-0x00007FF80F380000-0x00007FF80FE41000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads