quasar | 30efa81a5d0d9bf04a00b4e30823c2f0c7bd6461383acf0195d857edf2162543

Analysis

max time kernel
118s
max time network
130s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
03-01-2025 11:45

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General

Target

kthiokadjg.exe
Size

288KB
MD5

cc5e91e1a0c3ca5edf2bdba7fa252827
SHA1

004ba0788113ebb3bce8eaf63fa53c70caa91079
SHA256

30efa81a5d0d9bf04a00b4e30823c2f0c7bd6461383acf0195d857edf2162543
SHA512

14ee287465bc50dc16ad042d35a14f9e676f645dabf4c4dfbd8f225845e45ab73fee6c3d7967fe44a21994ddbd5b76d0cbd01ec0a2784f913587313c4a407249
SSDEEP

6144:E7zO0LSclT6FOwEP5Kq+SMv0VGb7bDcllbkln:6lJtTF9zVGkllbk5

Score

10^/10

quasar office discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office

85.192.29.60:5173

Mutex

QAPB6w0UbYXMvQdKRF

Attributes

encryption_key
pxC3g4rfVijQxK1hMGwM
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/2504-1-0x0000000000240000-0x000000000028E000-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	kthiokadjg.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
2148	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2504	kthiokadjg.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2504	kthiokadjg.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2504 wrote to memory of 2148	2504	kthiokadjg.exe	31
PID 2504 wrote to memory of 2148	2504	kthiokadjg.exe	31
PID 2504 wrote to memory of 2148	2504	kthiokadjg.exe	31
PID 2504 wrote to memory of 2148	2504	kthiokadjg.exe	31

C:\Users\Admin\AppData\Local\Temp\kthiokadjg.exe
"C:\Users\Admin\AppData\Local\Temp\kthiokadjg.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2504
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "NET framework" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\kthiokadjg.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2148

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/2504-0-0x000000007485E000-0x000000007485F000-memory.dmp

Filesize
4KB

Download
memory/2504-1-0x0000000000240000-0x000000000028E000-memory.dmp

Filesize
312KB

Download
memory/2504-2-0x0000000074850000-0x0000000074F3E000-memory.dmp

Filesize
6.9MB

Download
memory/2504-4-0x000000007485E000-0x000000007485F000-memory.dmp

Filesize
4KB

Download
memory/2504-5-0x0000000074850000-0x0000000074F3E000-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