quasar | 0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
18-05-2024 17:25

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General

Target

0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe
Size

3.1MB
MD5

baa8a99d97d03602397dbfafe2d59a66
SHA1

15d7de25b0c256f3f490512191c3150054c29793
SHA256

0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a
SHA512

900c7b316ded642a3e41f11d07d486cafc23770782ba9beedf42a69a89591913a2dccff4e95e0f43cfb949e59d63d598475be9f15413756e5371bfac831be89e
SSDEEP

49152:6vkt62XlaSFNWPjljiFa2RoUYI17xNESEQk/iVLoGdeEPETHHB72eh2NT:6v462XlaSFNWPjljiFXRoUYI1xbtt

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.1.12:4782

Mutex

46113e25-df6e-4a96-919f-3f0b0ebb89e3

Attributes

encryption_key
19B2878E7111F70CAD1E17A936917EF8A8ABB80A
install_name
VirusMaker.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Microsoft Edge
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/1588-1-0x0000000000980000-0x0000000000CA4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\VirusMaker.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

VirusMaker.exe

pid process

3152 VirusMaker.exe
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

4248 schtasks.exe
1072 schtasks.exe

pid	process
3152	VirusMaker.exe

pid	process
4248	schtasks.exe
1072	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exeVirusMaker.exe

description	pid	process
Token: SeDebugPrivilege	1588	0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe
Token: SeDebugPrivilege	3152	VirusMaker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

VirusMaker.exe

pid process

3152 VirusMaker.exe

pid	process
3152	VirusMaker.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exeVirusMaker.exe

description	pid	process	target process
PID 1588 wrote to memory of 4248	1588	0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe	schtasks.exe
PID 1588 wrote to memory of 4248	1588	0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe	schtasks.exe
PID 1588 wrote to memory of 3152	1588	0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe	VirusMaker.exe
PID 1588 wrote to memory of 3152	1588	0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe	VirusMaker.exe
PID 3152 wrote to memory of 1072	3152	VirusMaker.exe	schtasks.exe
PID 3152 wrote to memory of 1072	3152	VirusMaker.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe
"C:\Users\Admin\AppData\Local\Temp\0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1588

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Microsoft Edge" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\VirusMaker.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:4248

C:\Users\Admin\AppData\Roaming\SubDir\VirusMaker.exe
"C:\Users\Admin\AppData\Roaming\SubDir\VirusMaker.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3152

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Microsoft Edge" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\VirusMaker.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:1072

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
3.1MB

MD5
baa8a99d97d03602397dbfafe2d59a66

SHA1
15d7de25b0c256f3f490512191c3150054c29793

SHA256
0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a

SHA512
900c7b316ded642a3e41f11d07d486cafc23770782ba9beedf42a69a89591913a2dccff4e95e0f43cfb949e59d63d598475be9f15413756e5371bfac831be89e

Download Submit
memory/1588-0-0x00007FF85B423000-0x00007FF85B425000-memory.dmp

Filesize
8KB

Download
memory/1588-1-0x0000000000980000-0x0000000000CA4000-memory.dmp

Filesize
3.1MB

Download
memory/1588-2-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

Filesize
10.8MB

Download
memory/1588-9-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

Filesize
10.8MB

Download
memory/3152-10-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

Filesize
10.8MB

Download
memory/3152-11-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

Filesize
10.8MB

Download
memory/3152-12-0x000000001B550000-0x000000001B5A0000-memory.dmp

Filesize
320KB

Download
memory/3152-13-0x000000001BD60000-0x000000001BE12000-memory.dmp

Filesize
712KB

Download
memory/3152-14-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

Filesize
10.8MB

Download