quasar | 0e6fc77a72dd0b4c8f8fe7607c92eac7cf5b0d607c9904e09d9fb1b2128a2e51

Analysis

max time kernel
148s
max time network
166s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
01-11-2024 08:01

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General

Target

start-main/jerniuiopu.exe
Size

288KB
MD5

d0d7ce7681200387de77c7ab2e2841cd
SHA1

8b6c4315e260954b6c33f450ad3baa9f79fe72e2
SHA256

b64b141eb3b3fa67f6605eb99b0e6f78eb5df7d483a2a0889821ccfac71a7a96
SHA512

bc3cfac3450cbc17ce8c9758f10c7e4034764f40a6797edd4a8eb6e95d6db9c5f46a46487a6e483ef0eed23243e9f92c0ea391a0416ebbc6854e2b9914ad9788
SSDEEP

6144:w7zO0LSclT6FOwEP5Kq+SMv0VGb7bDcllbk9n:OlJtTF9zVGkllbkh

Score

10^/10

quasar office discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office

82.117.243.110:5173

Mutex

yfsS9ida0wX8mgpdJC

Attributes

encryption_key
KDNBgA8jiBeGX1rj1dDt
install_name
csrss.exe
log_directory
Logs
reconnect_delay
3000
startup_key
NET framework
subdirectory
SubDir

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
Quasar family
quasar

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral15/memory/3256-1-0x0000000000C30000-0x0000000000C7E000-memory.dmp	family_quasar

Looks up external IP address via web service 1 IoCs

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

Processes:

flow	ioc
13	ip-api.com

System Location Discovery: System Language Discovery 1 TTPs 2 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

Processes:

jerniuiopu.exeschtasks.exe

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

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exe

pid	Process
2436	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

jerniuiopu.exe

description	pid	Process
Token: SeDebugPrivilege	3256	jerniuiopu.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

jerniuiopu.exe

pid	Process
3256	jerniuiopu.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

jerniuiopu.exe

description	pid	Process	procid_target
PID 3256 wrote to memory of 2436	3256	jerniuiopu.exe	87
PID 3256 wrote to memory of 2436	3256	jerniuiopu.exe	87
PID 3256 wrote to memory of 2436	3256	jerniuiopu.exe	87

C:\Users\Admin\AppData\Local\Temp\start-main\jerniuiopu.exe
"C:\Users\Admin\AppData\Local\Temp\start-main\jerniuiopu.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3256
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "NET framework" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\start-main\jerniuiopu.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2436

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/3256-0-0x0000000074C8E000-0x0000000074C8F000-memory.dmp

Filesize
4KB

Download
memory/3256-1-0x0000000000C30000-0x0000000000C7E000-memory.dmp

Filesize
312KB

Download
memory/3256-2-0x0000000005B70000-0x0000000006114000-memory.dmp

Filesize
5.6MB

Download
memory/3256-3-0x0000000005710000-0x00000000057A2000-memory.dmp

Filesize
584KB

Download
memory/3256-4-0x0000000074C80000-0x0000000075430000-memory.dmp

Filesize
7.7MB

Download
memory/3256-5-0x0000000005680000-0x00000000056E6000-memory.dmp

Filesize
408KB

Download
memory/3256-6-0x0000000006390000-0x00000000063A2000-memory.dmp

Filesize
72KB

Download
memory/3256-7-0x00000000068D0000-0x000000000690C000-memory.dmp

Filesize
240KB

Download
memory/3256-9-0x0000000006C50000-0x0000000006C5A000-memory.dmp

Filesize
40KB

Download
memory/3256-10-0x0000000074C8E000-0x0000000074C8F000-memory.dmp

Filesize
4KB

Download
memory/3256-11-0x0000000074C80000-0x0000000075430000-memory.dmp

Filesize
7.7MB

Download