quasar | b57a935934c95ee888778e0fd203efe1891db47663f15afc158779bd838e43c6

Analysis

max time kernel
149s
max time network
157s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26-04-2024 01:29

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General

Target

c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe
Size

3.1MB
MD5

92c93c0f3d586d4f26865f78c91c7200
SHA1

acfaf4714bd8dc1f784275a8a513a1e4c1a2de12
SHA256

c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d
SHA512

9198dd61f07ec9ac01816c57c3925e16c65687df38aeeb8fa21c7e9aaa9a2011269a5023ac66fa4c0be2185744f530c38b618196db063acd1582e3cfcc460cb5
SSDEEP

49152:rv2I22SsaNYfdPBldt698dBcjHMkxNESEVk/iELoGdB7JTHHB72eh2NT:rvb22SsaNYfdPBldt6+dBcjHvxgK

Score

10^/10

quasar dp spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

xm.wintk.vip:1994

Mutex

09ae387c-a1cd-4bbc-a043-40c1658a6432

Attributes

encryption_key
9FE64C9ADDD7473DAA5F3B825BA5B87D261905EF
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/3508-0-0x00000000004E0000-0x0000000000804000-memory.dmp	family_quasar

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\Client.exe	c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe
File opened for modification	C:\Windows\system32\SubDir\Client.exe	c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
5084	schtasks.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3508	c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3508 wrote to memory of 5084	3508	c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe	92
PID 3508 wrote to memory of 5084	3508	c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe	92

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\c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe
"C:\Users\Admin\AppData\Local\Temp\c305dc9e2de49fecff28d19facee4e30fc568cbd04594f328c60301b1744387d.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3508
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:5084

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4092 --field-trial-handle=2280,i,716736634476467098,11449718822158202904,262144 --variations-seed-version /prefetch:8
1⤵
PID:4936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3508-0-0x00000000004E0000-0x0000000000804000-memory.dmp

Filesize
3.1MB

Download
memory/3508-1-0x00007FFEAC100000-0x00007FFEACBC1000-memory.dmp

Filesize
10.8MB

Download
memory/3508-2-0x000000001B650000-0x000000001B660000-memory.dmp

Filesize
64KB

Download
memory/3508-3-0x00007FFEAC100000-0x00007FFEACBC1000-memory.dmp

Filesize
10.8MB

Download
memory/3508-4-0x000000001B650000-0x000000001B660000-memory.dmp

Filesize
64KB

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads