quasar | a3c253b9f12724dd49f22f7e2f111a6a0e4287720aeacb27bd82972340bafbd5

General

Target

Spoofer.exe
Size

3.1MB
MD5

eeb9030f12d05fe972d17b4c8f1e4d81
SHA1

08d59c0a50e25ef04bc1e4aa679e142ff1404f60
SHA256

a3c253b9f12724dd49f22f7e2f111a6a0e4287720aeacb27bd82972340bafbd5
SHA512

ed941abf3bfe4bbf684cb595dfb31b987c8416082e450b47936964b22edaee78e4b4e8a40fb8b45a87382d0e6b4f5b7cf7075e9e09eeb3cac7b29cb6e68299c9
SSDEEP

49152:/veI22SsaNYfdPBldt698dBcjHtyRJ6dbR3LoGdiiyTHHB72eh2NT:/vT22SsaNYfdPBldt6+dBcjHtyRJ6v

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.0.251:4782

Mutex

264addfa-0a06-4ba0-acee-229ad6bbba67

Attributes

encryption_key
75E2416D3C71CA793E6D1DD93AC978C2967ABC7A
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Java updater.exe
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

resource	yara_rule
behavioral1/memory/2672-1-0x0000000000EC0000-0x00000000011E4000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015689-5.dat	family_quasar
behavioral1/memory/2736-8-0x0000000000D10000-0x0000000001034000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2736	Client.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2804	schtasks.exe
2612	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2672	Spoofer.exe
Token: SeDebugPrivilege	2736	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2736	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2736	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2736	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2672 wrote to memory of 2804	2672	Spoofer.exe	30
PID 2672 wrote to memory of 2804	2672	Spoofer.exe	30
PID 2672 wrote to memory of 2804	2672	Spoofer.exe	30
PID 2672 wrote to memory of 2736	2672	Spoofer.exe	32
PID 2672 wrote to memory of 2736	2672	Spoofer.exe	32
PID 2672 wrote to memory of 2736	2672	Spoofer.exe	32
PID 2736 wrote to memory of 2612	2736	Client.exe	33
PID 2736 wrote to memory of 2612	2736	Client.exe	33
PID 2736 wrote to memory of 2612	2736	Client.exe	33

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\Spoofer.exe
"C:\Users\Admin\AppData\Local\Temp\Spoofer.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2672
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Java updater.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2804
- 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 FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2736
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Java updater.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2612

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
3.1MB

MD5
eeb9030f12d05fe972d17b4c8f1e4d81

SHA1
08d59c0a50e25ef04bc1e4aa679e142ff1404f60

SHA256
a3c253b9f12724dd49f22f7e2f111a6a0e4287720aeacb27bd82972340bafbd5

SHA512
ed941abf3bfe4bbf684cb595dfb31b987c8416082e450b47936964b22edaee78e4b4e8a40fb8b45a87382d0e6b4f5b7cf7075e9e09eeb3cac7b29cb6e68299c9

Download Submit
memory/2672-0-0x000007FEF59E3000-0x000007FEF59E4000-memory.dmp

Filesize
4KB

Download
memory/2672-1-0x0000000000EC0000-0x00000000011E4000-memory.dmp

Filesize
3.1MB

Download
memory/2672-2-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

Filesize
9.9MB

Download
memory/2672-9-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

Filesize
9.9MB

Download
memory/2736-7-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

Filesize
9.9MB

Download
memory/2736-8-0x0000000000D10000-0x0000000001034000-memory.dmp

Filesize
3.1MB

Download
memory/2736-10-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

Filesize
9.9MB

Download
memory/2736-11-0x000007FEF59E0000-0x000007FEF63CC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads