quasar | f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb

Analysis

max time kernel
126s
max time network
136s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
13-12-2024 10:13

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General

Target

jrockekcurje.exe
Size

288KB
MD5

8a306aec318555fc080f94d5b7a9a2d0
SHA1

94f093f15e0b115bbc9dee803c68c104dcb54524
SHA256

f3b37b062dac443be97891f5ca9992c41ed61d5517a85f9920a677b3660566fb
SHA512

0fe708d879397787eb5c80f0b96d0e18b3264f81950e987d47669a73e49bc5fdf3c8260d6ad1d7f646b6c71d279c63d9b2e9f1fa5e17bc23d8177ef94cbe46d9
SSDEEP

6144:A7zO0LSclT6FOwEP5Kq+SMv0VGb7bDcllbk7n:+lJtTF9zVGkllbkr

Score

10^/10

quasar office discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office

45.136.51.217:5173

Mutex

QYKKiqqJ0K2HqPP0Mo

Attributes

encryption_key
rFGYI3uEIwvomle2u8mk
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

resource	yara_rule
behavioral1/memory/2764-1-0x0000000000CE0000-0x0000000000D2E000-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.

flow	ioc
2	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

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

pid	Process
2964	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2764	jrockekcurje.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2764	jrockekcurje.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2764 wrote to memory of 2964	2764	jrockekcurje.exe	31
PID 2764 wrote to memory of 2964	2764	jrockekcurje.exe	31
PID 2764 wrote to memory of 2964	2764	jrockekcurje.exe	31
PID 2764 wrote to memory of 2964	2764	jrockekcurje.exe	31

C:\Users\Admin\AppData\Local\Temp\jrockekcurje.exe
"C:\Users\Admin\AppData\Local\Temp\jrockekcurje.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2764
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "NET framework" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\jrockekcurje.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2964

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

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Downloads

memory/2764-0-0x0000000074AEE000-0x0000000074AEF000-memory.dmp

Filesize
4KB

Download
memory/2764-1-0x0000000000CE0000-0x0000000000D2E000-memory.dmp

Filesize
312KB

Download
memory/2764-2-0x0000000074AE0000-0x00000000751CE000-memory.dmp

Filesize
6.9MB

Download
memory/2764-4-0x0000000074AEE000-0x0000000074AEF000-memory.dmp

Filesize
4KB

Download
memory/2764-5-0x0000000074AE0000-0x00000000751CE000-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