quasar | 8d106f71a5aa03870ba5dddf04af6debaaf9a4e9e56a48067e5aa00cf320f727

General

Target

Bloxmoon-Predictor-free.exe
Size

3.2MB
MD5

ce93805d452be57633fc0e38763887e9
SHA1

2fb5e465238ca96ebc6f955cfc4bde27112ff274
SHA256

8d106f71a5aa03870ba5dddf04af6debaaf9a4e9e56a48067e5aa00cf320f727
SHA512

b35e4bac77849b2da7bc7f43d835e29ab0f2bd2a1ae9f8e8858cd1877703fb49c42b6badcc918e7533cc6d50cafdf0ef5c48c3fb84e1285d392dd430e1ce8024
SSDEEP

49152:7vbI22SsaNYfdPBldt698dBcjHBJRJ6HbR3LoGdjTHHB72eh2NT1:7vk22SsaNYfdPBldt6+dBcjHBJRJ6Zq

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.34:4782

Mutex

02ba042d-472f-4b7e-b3fd-5412a40a2cb7

Attributes

encryption_key
8BCA2555488EAA5FCF27A2654D564FF338A22CA4
install_name
Predictor.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 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/692-1-0x00000000002C0000-0x00000000005FC000-memory.dmp	family_quasar
C:\Windows\System32\SubDir\Predictor.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Predictor.exe

pid process

4272 Predictor.exe

pid	process
4272	Predictor.exe

Drops file in System32 directory 2 IoCs

Processes:

Bloxmoon-Predictor-free.exe

description	ioc	process
File created	C:\Windows\system32\SubDir\Predictor.exe	Bloxmoon-Predictor-free.exe
File opened for modification	C:\Windows\system32\SubDir\Predictor.exe	Bloxmoon-Predictor-free.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

3132 schtasks.exe
2864 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Bloxmoon-Predictor-free.exePredictor.exe

description pid process

Token: SeDebugPrivilege 692 Bloxmoon-Predictor-free.exe
Token: SeDebugPrivilege 4272 Predictor.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

Predictor.exe

pid process

4272 Predictor.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

Predictor.exe

pid process

4272 Predictor.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Predictor.exe

pid process

4272 Predictor.exe

pid	process
3132	schtasks.exe
2864	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	692	Bloxmoon-Predictor-free.exe
Token: SeDebugPrivilege	4272	Predictor.exe

pid	process
4272	Predictor.exe

pid	process
4272	Predictor.exe

pid	process
4272	Predictor.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Bloxmoon-Predictor-free.exePredictor.exe

description	pid	process	target process
PID 692 wrote to memory of 3132	692	Bloxmoon-Predictor-free.exe	schtasks.exe
PID 692 wrote to memory of 3132	692	Bloxmoon-Predictor-free.exe	schtasks.exe
PID 692 wrote to memory of 4272	692	Bloxmoon-Predictor-free.exe	Predictor.exe
PID 692 wrote to memory of 4272	692	Bloxmoon-Predictor-free.exe	Predictor.exe
PID 4272 wrote to memory of 2864	4272	Predictor.exe	schtasks.exe
PID 4272 wrote to memory of 2864	4272	Predictor.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\Bloxmoon-Predictor-free.exe
"C:\Users\Admin\AppData\Local\Temp\Bloxmoon-Predictor-free.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:692

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Predictor.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:3132

C:\Windows\system32\SubDir\Predictor.exe
"C:\Windows\system32\SubDir\Predictor.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4272

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Predictor.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:2864

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4068,i,1809100026287847100,9768898026582633513,262144 --variations-seed-version --mojo-platform-channel-handle=4072 /prefetch:8
1⤵
PID:4728

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

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Downloads

C:\Windows\System32\SubDir\Predictor.exe

Filesize
3.2MB

MD5
ce93805d452be57633fc0e38763887e9

SHA1
2fb5e465238ca96ebc6f955cfc4bde27112ff274

SHA256
8d106f71a5aa03870ba5dddf04af6debaaf9a4e9e56a48067e5aa00cf320f727

SHA512
b35e4bac77849b2da7bc7f43d835e29ab0f2bd2a1ae9f8e8858cd1877703fb49c42b6badcc918e7533cc6d50cafdf0ef5c48c3fb84e1285d392dd430e1ce8024

Download Submit
memory/692-0-0x00007FF94B5A3000-0x00007FF94B5A5000-memory.dmp

Filesize
8KB

Download
memory/692-1-0x00000000002C0000-0x00000000005FC000-memory.dmp

Filesize
3.2MB

Download
memory/692-2-0x00007FF94B5A0000-0x00007FF94C061000-memory.dmp

Filesize
10.8MB

Download
memory/692-9-0x00007FF94B5A0000-0x00007FF94C061000-memory.dmp

Filesize
10.8MB

Download
memory/4272-8-0x00007FF94B5A0000-0x00007FF94C061000-memory.dmp

Filesize
10.8MB

Download
memory/4272-10-0x00007FF94B5A0000-0x00007FF94C061000-memory.dmp

Filesize
10.8MB

Download
memory/4272-11-0x000000001BC90000-0x000000001BCE0000-memory.dmp

Filesize
320KB

Download
memory/4272-12-0x000000001BDA0000-0x000000001BE52000-memory.dmp

Filesize
712KB

Download
memory/4272-13-0x00007FF94B5A0000-0x00007FF94C061000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads