quasar | 398abac5d259fce710f2ed5da055de32759e61524f1968a900ecf6dbb8bda3dd

Analysis

max time kernel
1799s
max time network
1160s
platform
windows11-21h2_x64
resource
win11-20240508-en
resource tags

arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
submitted
28-06-2024 01:35

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General

Target

Client-built.exe
Size

3.1MB
MD5

38072c09609f9d5d18728038a64d619a
SHA1

04b8e50360b870a987ee245965f037cd64f6dab6
SHA256

398abac5d259fce710f2ed5da055de32759e61524f1968a900ecf6dbb8bda3dd
SHA512

b3b8bec866daa77d1ea87a6b8875a7e9e1e2a934eba4e096a23d295fb804f95dd088fe14e7ded863abe00e5bc57bedb2d7c39934dafa51952f2ae887b2aa6a94
SSDEEP

49152:LvnI22SsaNYfdPBldt698dBcjHAhOEEfsek/HYBoGdPTHHB72eh2NT:LvI22SsaNYfdPBldt6+dBcjHAhOAK

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

255.255.255.0:4782

Mutex

562d2243-0363-49ab-b547-810cd136b950

Attributes

encryption_key
2802AB6175F0B038574EF96E3018A9284A075BAB
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/1688-1-0x0000000000B40000-0x0000000000E64000-memory.dmp family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe family_quasar
Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

5044 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 1688 Client-built.exe
Token: SeDebugPrivilege 5044 Client.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Client.exe

pid process

5044 Client.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Client.exe

pid process

5044 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

5044 Client.exe
Suspicious use of WriteProcessMemory 2 IoCs

Processes:

Client-built.exe

description pid process target process

PID 1688 wrote to memory of 5044 1688 Client-built.exe Client.exe
PID 1688 wrote to memory of 5044 1688 Client-built.exe Client.exe

resource	yara_rule
behavioral1/memory/1688-1-0x0000000000B40000-0x0000000000E64000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

pid	process
5044	Client.exe

description	pid	process
Token: SeDebugPrivilege	1688	Client-built.exe
Token: SeDebugPrivilege	5044	Client.exe

pid	process
5044	Client.exe

pid	process
5044	Client.exe

pid	process
5044	Client.exe

description	pid	process	target process
PID 1688 wrote to memory of 5044	1688	Client-built.exe	Client.exe
PID 1688 wrote to memory of 5044	1688	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:1688

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
- Suspicious use of SetWindowsHookEx
PID:5044

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:3028

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
Filesize
3.1MB

MD5
38072c09609f9d5d18728038a64d619a

SHA1
04b8e50360b870a987ee245965f037cd64f6dab6

SHA256
398abac5d259fce710f2ed5da055de32759e61524f1968a900ecf6dbb8bda3dd

SHA512
b3b8bec866daa77d1ea87a6b8875a7e9e1e2a934eba4e096a23d295fb804f95dd088fe14e7ded863abe00e5bc57bedb2d7c39934dafa51952f2ae887b2aa6a94

Download Submit
memory/1688-0-0x00007FFCABD73000-0x00007FFCABD75000-memory.dmp

Filesize
8KB

Download
memory/1688-1-0x0000000000B40000-0x0000000000E64000-memory.dmp

Filesize
3.1MB

Download
memory/1688-2-0x00007FFCABD70000-0x00007FFCAC832000-memory.dmp

Filesize
10.8MB

Download
memory/1688-9-0x00007FFCABD70000-0x00007FFCAC832000-memory.dmp

Filesize
10.8MB

Download
memory/5044-8-0x00007FFCABD70000-0x00007FFCAC832000-memory.dmp

Filesize
10.8MB

Download
memory/5044-10-0x00007FFCABD70000-0x00007FFCAC832000-memory.dmp

Filesize
10.8MB

Download
memory/5044-11-0x000000001BFF0000-0x000000001C040000-memory.dmp

Filesize
320KB

Download
memory/5044-12-0x000000001C100000-0x000000001C1B2000-memory.dmp

Filesize
712KB

Download
memory/5044-13-0x00007FFCABD70000-0x00007FFCAC832000-memory.dmp

Filesize
10.8MB

Download