quasar | a9e84520f8f8fd1383b54b297044ed2ca34e23172c7b6719a9185527b6fa194c

General

Target

2386d1e1a35e51b0c869655580ab6431.exe
Size

3.1MB
MD5

2386d1e1a35e51b0c869655580ab6431
SHA1

44de49d3050793f1cea18a62fc7649c96deebaa7
SHA256

a9e84520f8f8fd1383b54b297044ed2ca34e23172c7b6719a9185527b6fa194c
SHA512

69d99d6d9d85c83f3d5029cec04abfddc54142044d39078799ba77fcec2715d41bbf4b114981fa697a8ee1afd9aa796733897e6d337ef1941e72d88631da5946
SSDEEP

49152:nv+lL26AaNeWgPhlmVqvMQ7XSKOEoDkE2HBk/+F5oGd1LTHHB72eh2NT:nvuL26AaNeWgPhlmVqkQ7XSKroDKX

Score

10^/10

quasar office01 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office01

C2

www.exiles.site:14782

192.151.244.144:14782

Mutex

32d6a0e2-190a-4f87-8d62-64ccb78f703b

Attributes

encryption_key
A1F8672246A55DFAFA317BFDC5F14C91A5B344B9
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 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2388-0-0x0000000000920000-0x0000000000C44000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar
behavioral1/memory/3036-10-0x0000000000E10000-0x0000000001134000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

3036 Client.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

2864 schtasks.exe
2888 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

2386d1e1a35e51b0c869655580ab6431.exeClient.exe

description pid process

Token: SeDebugPrivilege 2388 2386d1e1a35e51b0c869655580ab6431.exe
Token: SeDebugPrivilege 3036 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

3036 Client.exe

pid	process
3036	Client.exe

pid	process
2864	schtasks.exe
2888	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2388	2386d1e1a35e51b0c869655580ab6431.exe
Token: SeDebugPrivilege	3036	Client.exe

pid	process
3036	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

2386d1e1a35e51b0c869655580ab6431.exeClient.exe

description	pid	process	target process
PID 2388 wrote to memory of 2864	2388	2386d1e1a35e51b0c869655580ab6431.exe	schtasks.exe
PID 2388 wrote to memory of 2864	2388	2386d1e1a35e51b0c869655580ab6431.exe	schtasks.exe
PID 2388 wrote to memory of 2864	2388	2386d1e1a35e51b0c869655580ab6431.exe	schtasks.exe
PID 2388 wrote to memory of 3036	2388	2386d1e1a35e51b0c869655580ab6431.exe	Client.exe
PID 2388 wrote to memory of 3036	2388	2386d1e1a35e51b0c869655580ab6431.exe	Client.exe
PID 2388 wrote to memory of 3036	2388	2386d1e1a35e51b0c869655580ab6431.exe	Client.exe
PID 3036 wrote to memory of 2888	3036	Client.exe	schtasks.exe
PID 3036 wrote to memory of 2888	3036	Client.exe	schtasks.exe
PID 3036 wrote to memory of 2888	3036	Client.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\2386d1e1a35e51b0c869655580ab6431.exe
"C:\Users\Admin\AppData\Local\Temp\2386d1e1a35e51b0c869655580ab6431.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2388

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:2864

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 SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3036

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:2888

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
Filesize
1.4MB

MD5
8a66f525d7e6e8800cd44b102d046424

SHA1
945aaae13525ca512884ab7053ea2c84e2a8864f

SHA256
d727c015390fc642bedede713885c22813b91007613c662fb6b8884b81764105

SHA512
b441de91efbcf50e4807770140bb47c2a4bbf1429238b4a35e126fd7c1ccef3bfb74e3eaadea2921bed7e96904e54c2dce1b72e0d27fdac44eb3ef5dcd9b245b

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
Filesize
1.6MB

MD5
7af4bc055bab150645e23ca81473ff6a

SHA1
6945e71cdfa4db8e9efe37c94fb295be3dbfcc1b

SHA256
88b4571bb01e06eaa0990b053d7b4ea7e1061d3f4382223d668a8cd50d3030af

SHA512
e689720c5af4644468e776cb5a1335d5ed1624c3d857a12d354cfce9639af233485d8f22ad641a6b2c7dd546ec68e709dbbc87cdd92ac777ae616a0507c9ba3b

Download Submit
memory/2388-0-0x0000000000920000-0x0000000000C44000-memory.dmp

Filesize
3.1MB

Download
memory/2388-1-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/2388-2-0x000000001B3A0000-0x000000001B420000-memory.dmp

Filesize
512KB

Download
memory/2388-9-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/3036-8-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/3036-11-0x000000001ACF0000-0x000000001AD70000-memory.dmp

Filesize
512KB

Download
memory/3036-10-0x0000000000E10000-0x0000000001134000-memory.dmp

Filesize
3.1MB

Download
memory/3036-12-0x000007FEF5AB0000-0x000007FEF649C000-memory.dmp

Filesize
9.9MB

Download
memory/3036-13-0x000000001ACF0000-0x000000001AD70000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads