quasar | 5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29

General

Target

5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29.exe
Size

502KB
MD5

9aae678c7cea5987d5092a61623207e2
SHA1

0243213e394988c281596785b9cdd3c5c8db0253
SHA256

5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29
SHA512

1f4e1df5d6936048456b493ed2d4268f611b94940f51b41c3c70f925306b451201d882e59031c80cd265ecbe84e0e22f57cc2f5446a9390a87973254db034be9
SSDEEP

12288:1TEgdfYXxURT3qh4kywJUpvZKJyRXMUykUcdW:WUw+25ywJUpvZKJGn8cdW

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

C2

93.177.102.208:1337

Mutex

b1f80fe6-27eb-4a1c-bb91-851d5cd8d500

Attributes

encryption_key
9C554DBE5929DA2C3E389A9DF35A30153D68038C
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Java Updater
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/1788-1-0x0000000000EA0000-0x0000000000F24000-memory.dmp	family_quasar
behavioral1/files/0x0008000000017481-5.dat	family_quasar
behavioral1/memory/1784-9-0x0000000000B90000-0x0000000000C14000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1784	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
2472	schtasks.exe
2368	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1788	5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29.exe
Token: SeDebugPrivilege	1784	Client.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1784	Client.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1784	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1788 wrote to memory of 2368	1788	5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29.exe	30
PID 1788 wrote to memory of 2368	1788	5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29.exe	30
PID 1788 wrote to memory of 2368	1788	5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29.exe	30
PID 1788 wrote to memory of 1784	1788	5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29.exe	32
PID 1788 wrote to memory of 1784	1788	5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29.exe	32
PID 1788 wrote to memory of 1784	1788	5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29.exe	32
PID 1784 wrote to memory of 2472	1784	Client.exe	33
PID 1784 wrote to memory of 2472	1784	Client.exe	33
PID 1784 wrote to memory of 2472	1784	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\5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29.exe
"C:\Users\Admin\AppData\Local\Temp\5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1788
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2368
- 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 WriteProcessMemory
  PID:1784
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Java Updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2472

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
502KB

MD5
9aae678c7cea5987d5092a61623207e2

SHA1
0243213e394988c281596785b9cdd3c5c8db0253

SHA256
5f541a16b678fb79fe6dc150a57108881efc9d392e77644024e288a38c02ff29

SHA512
1f4e1df5d6936048456b493ed2d4268f611b94940f51b41c3c70f925306b451201d882e59031c80cd265ecbe84e0e22f57cc2f5446a9390a87973254db034be9

Download Submit
memory/1784-7-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/1784-9-0x0000000000B90000-0x0000000000C14000-memory.dmp

Filesize
528KB

Download
memory/1784-10-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/1784-11-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/1788-0-0x000007FEF5D13000-0x000007FEF5D14000-memory.dmp

Filesize
4KB

Download
memory/1788-1-0x0000000000EA0000-0x0000000000F24000-memory.dmp

Filesize
528KB

Download
memory/1788-2-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

Filesize
9.9MB

Download
memory/1788-8-0x000007FEF5D10000-0x000007FEF66FC000-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