quasar | a3e14e4d2d7e379acd49b087d803e4651df001ee6596447a35f1afe23750df93

General

Target

a3e14e4d2d7e379acd49b087d803e4651df001ee6596447a35f1afe23750df93.exe
Size

3.1MB
MD5

f57d584af554ff7a5af7f2e907575661
SHA1

98d2c4bd90fff59ea67e3112dc753a140cc3324a
SHA256

a3e14e4d2d7e379acd49b087d803e4651df001ee6596447a35f1afe23750df93
SHA512

1229c15dfb75164da3533613adeddd8b0916b6a36ebaf9c25932b998bc718ced042341fdc88270a635fba3905bbeac49acbc72f88d55ecffb8e9dacfb66ca839
SSDEEP

49152:ivkt62XlaSFNWPjljiFa2RoUYIbF73/QBxTLoGdTmcTHHB72eh2NT:iv462XlaSFNWPjljiFXRoUYIt3/ci

Score

10^/10

quasar clients4 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

clients4

C2

193.143.1.121:9669

Mutex

47e9495b-6eb3-43b3-87fd-6dee9f4b772a

Attributes

encryption_key
B4A0A2EFBE8C22E116B4B6DCCD6B4CC8DB5CB9C6
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
OneDrive
subdirectory
SubDir

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/1912-1-0x0000000000E50000-0x0000000001174000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023b5a-5.dat	family_quasar

Downloads MZ/PE file 1 IoCs

flow	pid	Process
52	768	Process not Found

Executes dropped EXE 1 IoCs

pid	Process
3348	Client.exe

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MicrosoftEdgeUpdate.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
4416	MicrosoftEdgeUpdate.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
3080	schtasks.exe
4204	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1912	a3e14e4d2d7e379acd49b087d803e4651df001ee6596447a35f1afe23750df93.exe
Token: SeDebugPrivilege	3348	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3348	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1912 wrote to memory of 3080	1912	a3e14e4d2d7e379acd49b087d803e4651df001ee6596447a35f1afe23750df93.exe	90
PID 1912 wrote to memory of 3080	1912	a3e14e4d2d7e379acd49b087d803e4651df001ee6596447a35f1afe23750df93.exe	90
PID 1912 wrote to memory of 3348	1912	a3e14e4d2d7e379acd49b087d803e4651df001ee6596447a35f1afe23750df93.exe	92
PID 1912 wrote to memory of 3348	1912	a3e14e4d2d7e379acd49b087d803e4651df001ee6596447a35f1afe23750df93.exe	92
PID 3348 wrote to memory of 4204	3348	Client.exe	96
PID 3348 wrote to memory of 4204	3348	Client.exe	96

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\a3e14e4d2d7e379acd49b087d803e4651df001ee6596447a35f1afe23750df93.exe
"C:\Users\Admin\AppData\Local\Temp\a3e14e4d2d7e379acd49b087d803e4651df001ee6596447a35f1afe23750df93.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1912
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "OneDrive" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3080
- 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:3348
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "OneDrive" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4204

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSIyIiBpbnN0YWxsZGF0ZXRpbWU9IjE3MzkyODMyMzYiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4Mzc1NDI1MTE0ODAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI1MzE0NTY3MTcxIi8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:4416

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 Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

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
f57d584af554ff7a5af7f2e907575661

SHA1
98d2c4bd90fff59ea67e3112dc753a140cc3324a

SHA256
a3e14e4d2d7e379acd49b087d803e4651df001ee6596447a35f1afe23750df93

SHA512
1229c15dfb75164da3533613adeddd8b0916b6a36ebaf9c25932b998bc718ced042341fdc88270a635fba3905bbeac49acbc72f88d55ecffb8e9dacfb66ca839

Download Submit
memory/1912-0-0x00007FF9C8373000-0x00007FF9C8375000-memory.dmp

Filesize
8KB

Download
memory/1912-1-0x0000000000E50000-0x0000000001174000-memory.dmp

Filesize
3.1MB

Download
memory/1912-2-0x00007FF9C8370000-0x00007FF9C8E31000-memory.dmp

Filesize
10.8MB

Download
memory/1912-9-0x00007FF9C8370000-0x00007FF9C8E31000-memory.dmp

Filesize
10.8MB

Download
memory/3348-10-0x00007FF9C8370000-0x00007FF9C8E31000-memory.dmp

Filesize
10.8MB

Download
memory/3348-11-0x00007FF9C8370000-0x00007FF9C8E31000-memory.dmp

Filesize
10.8MB

Download
memory/3348-12-0x000000001BF80000-0x000000001BFD0000-memory.dmp

Filesize
320KB

Download
memory/3348-13-0x000000001C090000-0x000000001C142000-memory.dmp

Filesize
712KB

Download
memory/3348-14-0x000000001BFF0000-0x000000001C002000-memory.dmp

Filesize
72KB

Download
memory/3348-15-0x000000001C050000-0x000000001C08C000-memory.dmp

Filesize
240KB

Download
memory/3348-16-0x00007FF9C8370000-0x00007FF9C8E31000-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