quasar | 8a7cfe4a79b49501f486288fe3c87138305119b04f126a8a9e8408f3d8e3771c

Analysis

max time kernel
282s
max time network
299s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
05-06-2024 21:23

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General

Target

Client-built.exe
Size

3.1MB
MD5

e46a4d586b41c48125c7f5f44e5f23e2
SHA1

b0ea55d5932426e0722167989691f11e08980ee0
SHA256

8a7cfe4a79b49501f486288fe3c87138305119b04f126a8a9e8408f3d8e3771c
SHA512

68c999533b8e3e5f2ede4f1b69838c99530b67f6f3da9ebd3c5641de72bcbfeae0b06e52811c602fbf52a85a4726109e8aab3d97fd1181dce34548106b12978b
SSDEEP

49152:jvpG42pda6D+/PjlLOlg6yQipVy8vE780k/mkEoGdiyTHHB72eh2NT:jvY42pda6D+/PjlLOlZyQipVy8Gv

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

10.9.33.1:25377

SteveLean-47385.portmap.host:47385

Mutex

603e73f4-1a5c-4a9d-96e3-7ee1f44390dd

Attributes

encryption_key
5C96F3FC23C24141669D950745FC3357502CE24B
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 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3648-1-0x00000000004F0000-0x0000000000814000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

5008 Client.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Client-built.exeClient.exe

description pid process

Token: SeDebugPrivilege 3648 Client-built.exe
Token: SeDebugPrivilege 5008 Client.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid process

5008 Client.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid process

5008 Client.exe

pid	process
5008	Client.exe

description	pid	process
Token: SeDebugPrivilege	3648	Client-built.exe
Token: SeDebugPrivilege	5008	Client.exe

pid	process
5008	Client.exe

pid	process
5008	Client.exe

Suspicious use of WriteProcessMemory 2 IoCs

Processes:

Client-built.exe

description	pid	process	target process
PID 3648 wrote to memory of 5008	3648	Client-built.exe	Client.exe
PID 3648 wrote to memory of 5008	3648	Client-built.exe	Client.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 WriteProcessMemory
PID:3648

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:5008

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

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
e46a4d586b41c48125c7f5f44e5f23e2

SHA1
b0ea55d5932426e0722167989691f11e08980ee0

SHA256
8a7cfe4a79b49501f486288fe3c87138305119b04f126a8a9e8408f3d8e3771c

SHA512
68c999533b8e3e5f2ede4f1b69838c99530b67f6f3da9ebd3c5641de72bcbfeae0b06e52811c602fbf52a85a4726109e8aab3d97fd1181dce34548106b12978b

Download Submit
memory/3648-0-0x00007FF8418E3000-0x00007FF8418E5000-memory.dmp

Filesize
8KB

Download
memory/3648-1-0x00000000004F0000-0x0000000000814000-memory.dmp

Filesize
3.1MB

Download
memory/3648-2-0x00007FF8418E0000-0x00007FF8423A1000-memory.dmp

Filesize
10.8MB

Download
memory/3648-9-0x00007FF8418E0000-0x00007FF8423A1000-memory.dmp

Filesize
10.8MB

Download
memory/5008-8-0x00007FF8418E0000-0x00007FF8423A1000-memory.dmp

Filesize
10.8MB

Download
memory/5008-10-0x00007FF8418E0000-0x00007FF8423A1000-memory.dmp

Filesize
10.8MB

Download
memory/5008-11-0x000000001C600000-0x000000001C650000-memory.dmp

Filesize
320KB

Download
memory/5008-12-0x000000001C710000-0x000000001C7C2000-memory.dmp

Filesize
712KB

Download
memory/5008-13-0x00007FF8418E0000-0x00007FF8423A1000-memory.dmp

Filesize
10.8MB

Download