quasar | 705a6a49aa16e995ea92d6f866a61c5d4e7b9eb4ec9986af35ce5b488c45fbb9

Analysis

max time kernel
146s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21-01-2025 17:55

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General

Target

Client-built.exe
Size

3.1MB
MD5

9f21cf43d032fc842837ef4b192140aa
SHA1

20464f746717ef1d9e7d4424a489bb07f9e0fc43
SHA256

705a6a49aa16e995ea92d6f866a61c5d4e7b9eb4ec9986af35ce5b488c45fbb9
SHA512

30ebc041afb9ca8990787a60bb3be189926e61c42897e99dd1b1a05a87a1a1679c0a60466670e3be0bf485d5aadf5898e993e1b883cdd924d7bfec56b0f9ad6f
SSDEEP

49152:CvIt62XlaSFNWPjljiFa2RoUYIL5zapoGBXTHHB72eh2NT:CvE62XlaSFNWPjljiFXRoUYIL5z2

Score

10^/10

quasar client spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Client

45.202.32.36:1111

Mutex

30f39ce2-55fb-4edc-9531-3fb9e6ba4912

Attributes

encryption_key
9ABAA568E3BFACC1828658EB883F521748218E8E
install_name
Updaterr.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Updater
subdirectory
Discord

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2136-1-0x0000000000A70000-0x0000000000D94000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015d19-6.dat	family_quasar
behavioral1/memory/2692-9-0x00000000013B0000-0x00000000016D4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2692	Updaterr.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2144	schtasks.exe
1652	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2136	Client-built.exe
Token: SeDebugPrivilege	2692	Updaterr.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2136 wrote to memory of 2144	2136	Client-built.exe	30
PID 2136 wrote to memory of 2144	2136	Client-built.exe	30
PID 2136 wrote to memory of 2144	2136	Client-built.exe	30
PID 2136 wrote to memory of 2692	2136	Client-built.exe	32
PID 2136 wrote to memory of 2692	2136	Client-built.exe	32
PID 2136 wrote to memory of 2692	2136	Client-built.exe	32
PID 2692 wrote to memory of 1652	2692	Updaterr.exe	33
PID 2692 wrote to memory of 1652	2692	Updaterr.exe	33
PID 2692 wrote to memory of 1652	2692	Updaterr.exe	33

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 WriteProcessMemory
PID:2136
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Discord\Updaterr.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2144
- C:\Users\Admin\AppData\Roaming\Discord\Updaterr.exe
  "C:\Users\Admin\AppData\Roaming\Discord\Updaterr.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2692
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Discord\Updaterr.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1652

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

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Discord\Updaterr.exe

Filesize
3.1MB

MD5
9f21cf43d032fc842837ef4b192140aa

SHA1
20464f746717ef1d9e7d4424a489bb07f9e0fc43

SHA256
705a6a49aa16e995ea92d6f866a61c5d4e7b9eb4ec9986af35ce5b488c45fbb9

SHA512
30ebc041afb9ca8990787a60bb3be189926e61c42897e99dd1b1a05a87a1a1679c0a60466670e3be0bf485d5aadf5898e993e1b883cdd924d7bfec56b0f9ad6f

Download Submit
memory/2136-0-0x000007FEF5983000-0x000007FEF5984000-memory.dmp

Filesize
4KB

Download
memory/2136-1-0x0000000000A70000-0x0000000000D94000-memory.dmp

Filesize
3.1MB

Download
memory/2136-2-0x000007FEF5980000-0x000007FEF636C000-memory.dmp

Filesize
9.9MB

Download
memory/2136-8-0x000007FEF5980000-0x000007FEF636C000-memory.dmp

Filesize
9.9MB

Download
memory/2692-10-0x000007FEF5980000-0x000007FEF636C000-memory.dmp

Filesize
9.9MB

Download
memory/2692-9-0x00000000013B0000-0x00000000016D4000-memory.dmp

Filesize
3.1MB

Download
memory/2692-11-0x000007FEF5980000-0x000007FEF636C000-memory.dmp

Filesize
9.9MB

Download
memory/2692-12-0x000007FEF5980000-0x000007FEF636C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads