quasar | b09675c211176f525637f74fbbbdf648eabc85203bf335fc3cc0b62b49493bf4

General

Target

c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7.exe
Size

363KB
MD5

94be4081af6754ba534f62d8968ffc71
SHA1

7f6504db5850ba020e23e69f5e6357e65ab0ef75
SHA256

c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7
SHA512

0588987187e34b1b3b63cf8e8c0ef258fa2dc781fe2d43108ba8af9a8b85fba1dcde57824c6fdb867f64f64f1007b184d0f9ab990f7c92c6ea0b3e27339d19f9
SSDEEP

6144:mcqQ4i1FFiEKDtupn0Ah9EbGCIl8De5erLfyH1F0YaaSk:HplihMnp9nuCkqHEYaab

Score

10^/10

quasar minigame discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

minigame

C2

103.47.224.39:4782

Mutex

QSR_MUTEX_LQvzas16MNIL3IavoG

Attributes

encryption_key
aBtW2exC5zUctYcKM4IY
install_name
winrar-x64-701.exe
log_directory
Logs
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/4080-1-0x00000000000F0000-0x0000000000152000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b7f-10.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1776	winrar-x64-701.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
11	ip-api.com

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\SubDir\winrar-x64-701.exe	c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7.exe
File opened for modification	C:\Program Files (x86)\SubDir\winrar-x64-701.exe	c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7.exe

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	c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	winrar-x64-701.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
540	schtasks.exe
1952	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4080	c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7.exe
Token: SeDebugPrivilege	1776	winrar-x64-701.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1776	winrar-x64-701.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 4080 wrote to memory of 540	4080	c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7.exe	84
PID 4080 wrote to memory of 540	4080	c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7.exe	84
PID 4080 wrote to memory of 540	4080	c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7.exe	84
PID 4080 wrote to memory of 1776	4080	c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7.exe	86
PID 4080 wrote to memory of 1776	4080	c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7.exe	86
PID 4080 wrote to memory of 1776	4080	c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7.exe	86
PID 1776 wrote to memory of 1952	1776	winrar-x64-701.exe	91
PID 1776 wrote to memory of 1952	1776	winrar-x64-701.exe	91
PID 1776 wrote to memory of 1952	1776	winrar-x64-701.exe	91

C:\Users\Admin\AppData\Local\Temp\c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7.exe
"C:\Users\Admin\AppData\Local\Temp\c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7.exe"
1⤵
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4080
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:540
- C:\Program Files (x86)\SubDir\winrar-x64-701.exe
  "C:\Program Files (x86)\SubDir\winrar-x64-701.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1776
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Program Files (x86)\SubDir\winrar-x64-701.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:1952

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:\Program Files (x86)\SubDir\winrar-x64-701.exe

Filesize
363KB

MD5
94be4081af6754ba534f62d8968ffc71

SHA1
7f6504db5850ba020e23e69f5e6357e65ab0ef75

SHA256
c6687f7bff8c2637685c5510e159abe6014d8b52cff618f40c265e5dcbcce1c7

SHA512
0588987187e34b1b3b63cf8e8c0ef258fa2dc781fe2d43108ba8af9a8b85fba1dcde57824c6fdb867f64f64f1007b184d0f9ab990f7c92c6ea0b3e27339d19f9

Download Submit
memory/1776-18-0x0000000075080000-0x0000000075830000-memory.dmp

Filesize
7.7MB

Download
memory/1776-17-0x0000000006A90000-0x0000000006A9A000-memory.dmp

Filesize
40KB

Download
memory/1776-15-0x0000000075080000-0x0000000075830000-memory.dmp

Filesize
7.7MB

Download
memory/1776-13-0x0000000075080000-0x0000000075830000-memory.dmp

Filesize
7.7MB

Download
memory/4080-3-0x0000000004C00000-0x0000000004C92000-memory.dmp

Filesize
584KB

Download
memory/4080-6-0x0000000005880000-0x0000000005892000-memory.dmp

Filesize
72KB

Download
memory/4080-7-0x0000000005DC0000-0x0000000005DFC000-memory.dmp

Filesize
240KB

Download
memory/4080-5-0x0000000004B60000-0x0000000004BC6000-memory.dmp

Filesize
408KB

Download
memory/4080-4-0x0000000075080000-0x0000000075830000-memory.dmp

Filesize
7.7MB

Download
memory/4080-14-0x0000000075080000-0x0000000075830000-memory.dmp

Filesize
7.7MB

Download
memory/4080-0-0x000000007508E000-0x000000007508F000-memory.dmp

Filesize
4KB

Download
memory/4080-2-0x0000000005050000-0x00000000055F4000-memory.dmp

Filesize
5.6MB

Download
memory/4080-1-0x00000000000F0000-0x0000000000152000-memory.dmp

Filesize
392KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads