quasar | da59a47ae6bde91de01f45a7c3ba4217bd91b4cb0087d58ed4e10eea50866e49

General

Target

robloxlist.exe
Size

348KB
MD5

cc0ce734de3f88924449b16df0c92911
SHA1

af48aa8c33b0d8f0757f9abe8938aa66dfa9a588
SHA256

da59a47ae6bde91de01f45a7c3ba4217bd91b4cb0087d58ed4e10eea50866e49
SHA512

c92a607b979a3013426ef181daced2792b451180d196078342dd64dcc6496cc98c824a67b60a7073f527ac905e12d62d61651b576e26a1921e60869c85bcd6b0
SSDEEP

6144:8uwb/c2L0t5kiOW9ubBcz7b3Ga66b2SO:7H2L5ly6czv3GalbJO

Score

10^/10

quasar clint discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Clint

C2

192.168.178.29:4780

192.168.178.29:4782

Mutex

QSR_MUTEX_02VEKG7zCDubNpN0wF

Attributes

encryption_key
SPXni05TVd0oAIJtmwYk
install_name
robloxfisch.exe
log_directory
Log
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 2 IoCs

resource	yara_rule
behavioral2/memory/4008-1-0x0000000000220000-0x000000000027E000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b67-10.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4488	robloxfisch.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
8	ip-api.com

System Location Discovery: System Language Discovery 1 TTPs 4 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	robloxlist.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	robloxfisch.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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
3752	schtasks.exe
4480	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4008	robloxlist.exe
Token: SeDebugPrivilege	4488	robloxfisch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4488	robloxfisch.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4008 wrote to memory of 3752	4008	robloxlist.exe	83
PID 4008 wrote to memory of 3752	4008	robloxlist.exe	83
PID 4008 wrote to memory of 3752	4008	robloxlist.exe	83
PID 4008 wrote to memory of 4488	4008	robloxlist.exe	85
PID 4008 wrote to memory of 4488	4008	robloxlist.exe	85
PID 4008 wrote to memory of 4488	4008	robloxlist.exe	85
PID 4488 wrote to memory of 4480	4488	robloxfisch.exe	86
PID 4488 wrote to memory of 4480	4488	robloxfisch.exe	86
PID 4488 wrote to memory of 4480	4488	robloxfisch.exe	86

C:\Users\Admin\AppData\Local\Temp\robloxlist.exe
"C:\Users\Admin\AppData\Local\Temp\robloxlist.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4008
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\robloxlist.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3752
- C:\Users\Admin\AppData\Roaming\SubDir\robloxfisch.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\robloxfisch.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4488
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\robloxfisch.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4480

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\robloxfisch.exe

Filesize
348KB

MD5
cc0ce734de3f88924449b16df0c92911

SHA1
af48aa8c33b0d8f0757f9abe8938aa66dfa9a588

SHA256
da59a47ae6bde91de01f45a7c3ba4217bd91b4cb0087d58ed4e10eea50866e49

SHA512
c92a607b979a3013426ef181daced2792b451180d196078342dd64dcc6496cc98c824a67b60a7073f527ac905e12d62d61651b576e26a1921e60869c85bcd6b0

Download Submit
memory/4008-6-0x00000000052E0000-0x00000000052F2000-memory.dmp

Filesize
72KB

Download
memory/4008-2-0x0000000005370000-0x0000000005914000-memory.dmp

Filesize
5.6MB

Download
memory/4008-3-0x0000000004D10000-0x0000000004DA2000-memory.dmp

Filesize
584KB

Download
memory/4008-4-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/4008-5-0x0000000004C80000-0x0000000004CE6000-memory.dmp

Filesize
408KB

Download
memory/4008-0-0x000000007472E000-0x000000007472F000-memory.dmp

Filesize
4KB

Download
memory/4008-7-0x0000000005EE0000-0x0000000005F1C000-memory.dmp

Filesize
240KB

Download
memory/4008-1-0x0000000000220000-0x000000000027E000-memory.dmp

Filesize
376KB

Download
memory/4008-13-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/4488-14-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/4488-15-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download
memory/4488-17-0x0000000006840000-0x000000000684A000-memory.dmp

Filesize
40KB

Download
memory/4488-18-0x0000000074720000-0x0000000074ED0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads