quasar | d95db1b044e9f20d4d56ff93904dadf7272ce22c1dd2b625443636e90d0ba3e5

Analysis

max time kernel
2s
platform
windows11-21h2_x64
resource
win11-20250314-en
resource tags

arch:x64arch:x86image:win11-20250314-enlocale:en-usos:windows11-21h2-x64system
submitted
26/03/2025, 00:19

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General

Target

Client-built.exe
Size

1.3MB
MD5

24c71e4e30536468929c5389a89b362c
SHA1

d5b89ee8a110431c464170cad3b3ab3aac8a579f
SHA256

d95db1b044e9f20d4d56ff93904dadf7272ce22c1dd2b625443636e90d0ba3e5
SHA512

77d2b579303d5cd250f5f58c78915e9711f6d5b669d1fe582fcac01bba9e5bc73de2018326a139770bad2d96d81a2e5f5f55cf3ba3eafd8b3b859ed0f2598a2f
SSDEEP

24576:tWO+qYjCoYsv+H5meSWHIPbcNK0KKfaOwI55l2SVcwVN/dEfVKfjFq:tWLx8EgKKHwCBVcEjiKfj

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.5.0

Botnet

Office04

147.185.221.26:12171

Mutex

87f86d42-0aec-44a5-b746-a8803e2e4ead

Attributes

encryption_key
251B3D6D57078758B504E154DF6317D159089F09
install_name
svchost.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Update
subdirectory
en-AR

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral1/memory/1680-1-0x000001597D030000-0x000001597D184000-memory.dmp	family_quasar
behavioral1/memory/1680-2-0x000001597D5C0000-0x000001597D5DA000-memory.dmp	family_quasar

Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs

Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\VBoxMiniRdrDN	Client-built.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
1680	Client-built.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1680	Client-built.exe

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Checks for VirtualBox DLLs, possible anti-VM trick
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1680

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/1680-0-0x00007FFAAB053000-0x00007FFAAB055000-memory.dmp

Filesize
8KB

Download
memory/1680-1-0x000001597D030000-0x000001597D184000-memory.dmp

Filesize
1.3MB

Download
memory/1680-2-0x000001597D5C0000-0x000001597D5DA000-memory.dmp

Filesize
104KB

Download
memory/1680-3-0x00007FFAAB050000-0x00007FFAABB12000-memory.dmp

Filesize
10.8MB

Download
memory/1680-4-0x00007FFAAB050000-0x00007FFAABB12000-memory.dmp

Filesize
10.8MB

Download