quasar | 3b39f69d0f4a6940599449eb78a958207e36ede726fc6d4c158cdf321b68523b

Analysis

max time kernel
296s
max time network
300s
platform
windows11-21h2_x64
resource
win11-20250313-en
resource tags

arch:x64arch:x86image:win11-20250313-enlocale:en-usos:windows11-21h2-x64system
submitted
27/03/2025, 22:02

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General

Target

hello.exe
Size

3.1MB
MD5

5ea0b798b2a63a8cc91ad44b17a0fe91
SHA1

8eb91782057dc16a4006d70314db6613b3a5d04e
SHA256

3b39f69d0f4a6940599449eb78a958207e36ede726fc6d4c158cdf321b68523b
SHA512

0086a59004d47d78152c3672a655e95aca238c8960551416aee262d373009fc4ecf15f94b254887fc93951650fd463dd61094d18a1ba245945ef1f9239253122
SSDEEP

49152:OvbI22SsaNYfdPBldt698dBcjHo94n4Zjhm7oGdZTHHB72eh2NT:Ovk22SsaNYfdPBldt6+dBcjHo94n4I

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

79.185.109.198:4782

Mutex

53790885-f84e-49fe-b0f5-533bcec24786

Attributes

encryption_key
3428C8CDB24FFC56DF6BBDDEC9905C3058F7B092
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 family
quasar

Quasar payload 1 IoCs

resource	yara_rule
behavioral1/memory/5632-1-0x0000000000760000-0x0000000000A84000-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 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	5632	hello.exe
Token: SeDebugPrivilege	5140	hello.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
5632	hello.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
5632	hello.exe

C:\Users\Admin\AppData\Local\Temp\hello.exe
"C:\Users\Admin\AppData\Local\Temp\hello.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:5632

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:560

C:\Users\Admin\AppData\Local\Temp\hello.exe
"C:\Users\Admin\AppData\Local\Temp\hello.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:5140

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/5140-7-0x00007FFF474B0000-0x00007FFF47F72000-memory.dmp

Filesize
10.8MB

Download
memory/5140-8-0x00007FFF474B0000-0x00007FFF47F72000-memory.dmp

Filesize
10.8MB

Download
memory/5140-10-0x00007FFF474B0000-0x00007FFF47F72000-memory.dmp

Filesize
10.8MB

Download
memory/5632-0-0x00007FFF474B3000-0x00007FFF474B5000-memory.dmp

Filesize
8KB

Download
memory/5632-1-0x0000000000760000-0x0000000000A84000-memory.dmp

Filesize
3.1MB

Download
memory/5632-2-0x00007FFF474B0000-0x00007FFF47F72000-memory.dmp

Filesize
10.8MB

Download
memory/5632-3-0x000000001C0E0000-0x000000001C130000-memory.dmp

Filesize
320KB

Download
memory/5632-4-0x000000001C1F0000-0x000000001C2A2000-memory.dmp

Filesize
712KB

Download
memory/5632-5-0x00007FFF474B3000-0x00007FFF474B5000-memory.dmp

Filesize
8KB

Download
memory/5632-6-0x00007FFF474B0000-0x00007FFF47F72000-memory.dmp

Filesize
10.8MB

Download