quasar | 56553e9d3cddfdc387221ea8c7e0e205420adbcb0cff285535f822aa7c627521

Analysis

max time kernel
142s
max time network
164s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26-05-2024 10:38

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General

Target

Client-built.exe
Size

3.1MB
MD5

19984e015fa1a640a86c1daec54fdabc
SHA1

d3823156228804226ce7592f45e24ffe8f964602
SHA256

56553e9d3cddfdc387221ea8c7e0e205420adbcb0cff285535f822aa7c627521
SHA512

31f12193ff5dc1de5af27661e47641dbcb1d6d056dc25080a1514c0aee8e3ffa1bbc9c2f2b94c56379aec615bb9b70b1b31a7fc6cb596e6479c93c840c29d3c5
SSDEEP

49152:3vbI22SsaNYfdPBldt698dBcjHQfmh1J5WoGdCtTHHB72eh2NT:3vk22SsaNYfdPBldt6+dBcjHQfmm

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.0.6:4782

Mutex

536deaa9-57d2-448a-ae01-b604426d7fa6

Attributes

encryption_key
DBB529B3F56F6D23695F8D7AC9BA28484A0D6D0F
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

Processes:

resource	yara_rule
behavioral1/memory/888-1-0x0000000000160000-0x0000000000484000-memory.dmp	family_quasar

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

System Information Discovery
T1082
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

Client-built.exe

description pid process

Token: SeDebugPrivilege 888 Client-built.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client-built.exe

pid process

888 Client-built.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client-built.exe

pid process

888 Client-built.exe

description	pid	process
Token: SeDebugPrivilege	888	Client-built.exe

pid	process
888	Client-built.exe

pid	process
888	Client-built.exe

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
PID:888

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=1344 --field-trial-handle=2292,i,2103142837140538807,15881446839139365070,262144 --variations-seed-version /prefetch:8
1⤵
PID:4000

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/888-0-0x00007FFE94223000-0x00007FFE94225000-memory.dmp

Filesize
8KB

Download
memory/888-1-0x0000000000160000-0x0000000000484000-memory.dmp

Filesize
3.1MB

Download
memory/888-2-0x00007FFE94220000-0x00007FFE94CE1000-memory.dmp

Filesize
10.8MB

Download
memory/888-3-0x000000001BB80000-0x000000001BBD0000-memory.dmp

Filesize
320KB

Download
memory/888-4-0x000000001BC90000-0x000000001BD42000-memory.dmp

Filesize
712KB

Download
memory/888-5-0x00007FFE94223000-0x00007FFE94225000-memory.dmp

Filesize
8KB

Download
memory/888-6-0x00007FFE94220000-0x00007FFE94CE1000-memory.dmp

Filesize
10.8MB

Download