quasar | 12ca4ad8cd613c8d086cd39a5c6e787c12209f2271ba850817b72eae3cd559da

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
30-11-2024 21:16

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General

Target

jgesfyhjsefa.exe
Size

288KB
MD5

26e2495c2fa61cf0dadf028726236ad4
SHA1

de0da2ea7ce65724faedd3f8239c8559000a293f
SHA256

b19963afaca6cfb8252041c70bdeda48b029ac9be3411a61342490c48a472583
SHA512

7e66a4eb948a0f4be858d694a62a215cfe2b3215d6506d816cb8e09895731dd3f80222e030922f73a48b4d86525a4d7b680d40c7023886af3940b9eec07aa0fa
SSDEEP

6144:h7zO0LSclT6FOwEP5Kq+SMv0VGb7bDcllbkHn:xlJtTF9zVGkllbkH

Score

10^/10

quasar office discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office

45.136.51.217:2222

Mutex

d1mBeqcqGummV1rEKw

Attributes

encryption_key
h9j7M9986eVjQwMbjacZ
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
behavioral14/memory/1668-1-0x00000000000F0000-0x000000000013E000-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
10	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:

jgesfyhjsefa.exeschtasks.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	jgesfyhjsefa.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
4348	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

jgesfyhjsefa.exe

description	pid	Process
Token: SeDebugPrivilege	1668	jgesfyhjsefa.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

jgesfyhjsefa.exe

pid	Process
1668	jgesfyhjsefa.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

jgesfyhjsefa.exe

description	pid	Process	procid_target
PID 1668 wrote to memory of 4348	1668	jgesfyhjsefa.exe	82
PID 1668 wrote to memory of 4348	1668	jgesfyhjsefa.exe	82
PID 1668 wrote to memory of 4348	1668	jgesfyhjsefa.exe	82

C:\Users\Admin\AppData\Local\Temp\jgesfyhjsefa.exe
"C:\Users\Admin\AppData\Local\Temp\jgesfyhjsefa.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1668
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "NET framework" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\jgesfyhjsefa.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4348

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/1668-0-0x0000000074E2E000-0x0000000074E2F000-memory.dmp

Filesize
4KB

Download
memory/1668-1-0x00000000000F0000-0x000000000013E000-memory.dmp

Filesize
312KB

Download
memory/1668-2-0x0000000005090000-0x0000000005634000-memory.dmp

Filesize
5.6MB

Download
memory/1668-3-0x0000000004B80000-0x0000000004C12000-memory.dmp

Filesize
584KB

Download
memory/1668-4-0x0000000074E20000-0x00000000755D0000-memory.dmp

Filesize
7.7MB

Download
memory/1668-5-0x0000000004C70000-0x0000000004CD6000-memory.dmp

Filesize
408KB

Download
memory/1668-6-0x0000000005860000-0x0000000005872000-memory.dmp

Filesize
72KB

Download
memory/1668-7-0x0000000005DA0000-0x0000000005DDC000-memory.dmp

Filesize
240KB

Download
memory/1668-9-0x0000000006110000-0x000000000611A000-memory.dmp

Filesize
40KB

Download
memory/1668-10-0x0000000074E2E000-0x0000000074E2F000-memory.dmp

Filesize
4KB

Download
memory/1668-11-0x0000000074E20000-0x00000000755D0000-memory.dmp

Filesize
7.7MB

Download