quasar | 0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a

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

C2

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 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2916-1-0x0000000000A70000-0x0000000000D94000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\VirusMaker.exe	family_quasar
behavioral1/memory/2984-10-0x0000000000190000-0x00000000004B4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

VirusMaker.exe

pid process

2984 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

2852 schtasks.exe
1728 schtasks.exe

pid	process
2984	VirusMaker.exe

pid	process
2852	schtasks.exe
1728	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exeVirusMaker.exe

description	pid	process
Token: SeDebugPrivilege	2916	0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe
Token: SeDebugPrivilege	2984	VirusMaker.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

VirusMaker.exe

pid process

2984 VirusMaker.exe

pid	process
2984	VirusMaker.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exeVirusMaker.exe

description	pid	process	target process
PID 2916 wrote to memory of 2852	2916	0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe	schtasks.exe
PID 2916 wrote to memory of 2852	2916	0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe	schtasks.exe
PID 2916 wrote to memory of 2852	2916	0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe	schtasks.exe
PID 2916 wrote to memory of 2984	2916	0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe	VirusMaker.exe
PID 2916 wrote to memory of 2984	2916	0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe	VirusMaker.exe
PID 2916 wrote to memory of 2984	2916	0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a.exe	VirusMaker.exe
PID 2984 wrote to memory of 1728	2984	VirusMaker.exe	schtasks.exe
PID 2984 wrote to memory of 1728	2984	VirusMaker.exe	schtasks.exe
PID 2984 wrote to memory of 1728	2984	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:2916

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:2852

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:2984

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:1728

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
3.1MB

MD5
baa8a99d97d03602397dbfafe2d59a66

SHA1
15d7de25b0c256f3f490512191c3150054c29793

SHA256
0580735fb9ce4e11f6e20041dbf837e43c10012391277339cac60ad7bec4db9a

SHA512
900c7b316ded642a3e41f11d07d486cafc23770782ba9beedf42a69a89591913a2dccff4e95e0f43cfb949e59d63d598475be9f15413756e5371bfac831be89e

Download Submit
memory/2916-0-0x000007FEF5393000-0x000007FEF5394000-memory.dmp

Filesize
4KB

Download
memory/2916-1-0x0000000000A70000-0x0000000000D94000-memory.dmp

Filesize
3.1MB

Download
memory/2916-2-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

Filesize
9.9MB

Download
memory/2916-8-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

Filesize
9.9MB

Download
memory/2984-9-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

Filesize
9.9MB

Download
memory/2984-10-0x0000000000190000-0x00000000004B4000-memory.dmp

Filesize
3.1MB

Download
memory/2984-11-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

Filesize
9.9MB

Download
memory/2984-12-0x000007FEF5390000-0x000007FEF5D7C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads