quasar | a591429743ce96a0c4b8d7e86130c3a61505cde949e9996b15117f6ab85a2b85

General

Target

robloxfischscriptlist.exe
Size

348KB
MD5

548fa12c57a2af723d85d90a4a8a6611
SHA1

b149e2c987cf1c584b94bb752bd81b27cde7f83b
SHA256

a591429743ce96a0c4b8d7e86130c3a61505cde949e9996b15117f6ab85a2b85
SHA512

3dc814d8ea98219444800ddffb6ff885fca45b8e305022156ea1620a09c5667a53d115225e4ef60448121797a4f383891cfd61b8bdc2bad61cc42828d0d7a217
SSDEEP

6144:MmNHXf500MbsOnxaxfROEUbDgosLDqvJq9v7IHPnW:Td50iOnvEViJq9TIvnW

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

Mutex

QSR_MUTEX_02VEKG7zCDubNpN0wF

Attributes

encryption_key
Bdex5bWk923mG5O2SXnn
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 3 IoCs

resource	yara_rule
behavioral1/memory/2100-1-0x0000000000BB0000-0x0000000000C0E000-memory.dmp	family_quasar
behavioral1/files/0x0008000000018741-4.dat	family_quasar
behavioral1/memory/536-10-0x0000000000C90000-0x0000000000CEE000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
536	robloxfisch.exe

Loads dropped DLL 1 IoCs

pid	Process
2100	robloxfischscriptlist.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
2	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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	robloxfischscriptlist.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	robloxfisch.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
2608	schtasks.exe
2320	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2100	robloxfischscriptlist.exe
Token: SeDebugPrivilege	536	robloxfisch.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
536	robloxfisch.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 2320	2100	robloxfischscriptlist.exe	31
PID 2100 wrote to memory of 2320	2100	robloxfischscriptlist.exe	31
PID 2100 wrote to memory of 2320	2100	robloxfischscriptlist.exe	31
PID 2100 wrote to memory of 2320	2100	robloxfischscriptlist.exe	31
PID 2100 wrote to memory of 536	2100	robloxfischscriptlist.exe	33
PID 2100 wrote to memory of 536	2100	robloxfischscriptlist.exe	33
PID 2100 wrote to memory of 536	2100	robloxfischscriptlist.exe	33
PID 2100 wrote to memory of 536	2100	robloxfischscriptlist.exe	33
PID 536 wrote to memory of 2608	536	robloxfisch.exe	34
PID 536 wrote to memory of 2608	536	robloxfisch.exe	34
PID 536 wrote to memory of 2608	536	robloxfisch.exe	34
PID 536 wrote to memory of 2608	536	robloxfisch.exe	34

C:\Users\Admin\AppData\Local\Temp\robloxfischscriptlist.exe
"C:\Users\Admin\AppData\Local\Temp\robloxfischscriptlist.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2100
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\robloxfischscriptlist.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2320
- 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:536
- - 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:2608

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

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

Filesize
348KB

MD5
548fa12c57a2af723d85d90a4a8a6611

SHA1
b149e2c987cf1c584b94bb752bd81b27cde7f83b

SHA256
a591429743ce96a0c4b8d7e86130c3a61505cde949e9996b15117f6ab85a2b85

SHA512
3dc814d8ea98219444800ddffb6ff885fca45b8e305022156ea1620a09c5667a53d115225e4ef60448121797a4f383891cfd61b8bdc2bad61cc42828d0d7a217

Download Submit
memory/536-10-0x0000000000C90000-0x0000000000CEE000-memory.dmp

Filesize
376KB

Download
memory/536-9-0x0000000074A30000-0x000000007511E000-memory.dmp

Filesize
6.9MB

Download
memory/536-12-0x0000000074A30000-0x000000007511E000-memory.dmp

Filesize
6.9MB

Download
memory/2100-0-0x0000000074A3E000-0x0000000074A3F000-memory.dmp

Filesize
4KB

Download
memory/2100-1-0x0000000000BB0000-0x0000000000C0E000-memory.dmp

Filesize
376KB

Download
memory/2100-2-0x0000000074A30000-0x000000007511E000-memory.dmp

Filesize
6.9MB

Download
memory/2100-11-0x0000000074A30000-0x000000007511E000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads