quasar | 9e9ff4b542d31bc8a8a52099758c9cb274727d341881c8df448d8f33ffc20117

Analysis

max time kernel
1049s
max time network
1052s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
31-10-2024 00:58

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General

Target

Client-built.exe
Size

3.1MB
MD5

fa0417d4b9f177a8cecfd88b345a7b28
SHA1

85770ee9f13a58e5eb95fcfb3868fcf626ad6552
SHA256

9e9ff4b542d31bc8a8a52099758c9cb274727d341881c8df448d8f33ffc20117
SHA512

f7d6ae87130fb63da8c53a26e384d364b2706096f3cce6a74add75ed62c50e6b93748e388eae27132b772a5e017db1166c519a946a067d46157917f2f638b79e
SSDEEP

49152:mv0t62XlaSFNWPjljiFa2RoUYIDQOEEfsUk/HYEoGdBVTHHB72eh2NT:mvo62XlaSFNWPjljiFXRoUYIDQOG/

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

10.127.0.227:4782

Mutex

cc382a3d-9ce3-4b59-ba4b-40acd01a72a5

Attributes

encryption_key
955952829EF4D4C700D061DBC84790B29C3FF5DD
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Java update
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
behavioral1/memory/2512-1-0x0000000000620000-0x0000000000944000-memory.dmp	family_quasar

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

taskmgr.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	taskmgr.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
3160	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

taskmgr.exe

pid	Process
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

taskmgr.exe

pid	Process
1064	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Client-built.exetaskmgr.exe

description	pid	Process
Token: SeDebugPrivilege	2512	Client-built.exe
Token: SeDebugPrivilege	1064	taskmgr.exe
Token: SeSystemProfilePrivilege	1064	taskmgr.exe
Token: SeCreateGlobalPrivilege	1064	taskmgr.exe

Suspicious use of FindShellTrayWindow 64 IoCs

Processes:

Client-built.exetaskmgr.exe

pid	Process
2512	Client-built.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe

Suspicious use of SendNotifyMessage 64 IoCs

Processes:

Client-built.exetaskmgr.exe

pid	Process
2512	Client-built.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe
1064	taskmgr.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

Client-built.exe

description	pid	Process	procid_target
PID 2512 wrote to memory of 3160	2512	Client-built.exe	83
PID 2512 wrote to memory of 3160	2512	Client-built.exe	83

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2512
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Java update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:3160

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /0
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:1064

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

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1064-15-0x000001EF3E110000-0x000001EF3E111000-memory.dmp

Filesize
4KB

Download
memory/1064-7-0x000001EF3E110000-0x000001EF3E111000-memory.dmp

Filesize
4KB

Download
memory/1064-8-0x000001EF3E110000-0x000001EF3E111000-memory.dmp

Filesize
4KB

Download
memory/1064-19-0x000001EF3E110000-0x000001EF3E111000-memory.dmp

Filesize
4KB

Download
memory/1064-9-0x000001EF3E110000-0x000001EF3E111000-memory.dmp

Filesize
4KB

Download
memory/1064-18-0x000001EF3E110000-0x000001EF3E111000-memory.dmp

Filesize
4KB

Download
memory/1064-17-0x000001EF3E110000-0x000001EF3E111000-memory.dmp

Filesize
4KB

Download
memory/1064-13-0x000001EF3E110000-0x000001EF3E111000-memory.dmp

Filesize
4KB

Download
memory/1064-16-0x000001EF3E110000-0x000001EF3E111000-memory.dmp

Filesize
4KB

Download
memory/1064-14-0x000001EF3E110000-0x000001EF3E111000-memory.dmp

Filesize
4KB

Download
memory/2512-5-0x00007FFB372E3000-0x00007FFB372E5000-memory.dmp

Filesize
8KB

Download
memory/2512-4-0x000000001CEA0000-0x000000001CF52000-memory.dmp

Filesize
712KB

Download
memory/2512-0-0x00007FFB372E3000-0x00007FFB372E5000-memory.dmp

Filesize
8KB

Download
memory/2512-2-0x00007FFB372E0000-0x00007FFB37DA2000-memory.dmp

Filesize
10.8MB

Download
memory/2512-6-0x00007FFB372E0000-0x00007FFB37DA2000-memory.dmp

Filesize
10.8MB

Download
memory/2512-1-0x0000000000620000-0x0000000000944000-memory.dmp

Filesize
3.1MB

Download
memory/2512-3-0x000000001CD90000-0x000000001CDE0000-memory.dmp

Filesize
320KB

Download