quasar | 180566813d8fd45aa00cd44907b262d0b153f48a3915eca64b1c42a17786cbbe

Analysis

max time kernel
131s
max time network
141s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16-01-2025 00:38

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General

Target

rdew23.exe
Size

3.1MB
MD5

fc96b0bb5bf41de7f1098763e7c6c121
SHA1

c86dbf100916664e69644fe4e182c30d7fd9d94b
SHA256

180566813d8fd45aa00cd44907b262d0b153f48a3915eca64b1c42a17786cbbe
SHA512

9966fa53e17290b2d6d51e4915d86429da85d1125b3f180c4881c5fbd85d08cb861b1ba06b9b6b972b44d7ee20748eba702fca6bffdc5b7b9d48401fb2d0e661
SSDEEP

49152:fvhuf2NUaNmwzPWlvdaKM7ZxTwgae2ECstk/6WDoGdnlTHHB72eh2NT:fv8f2NUaNmwzPWlvdaB7ZxTwgaelC3

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

10.0.0.85:4782

172.16.0.2:4782

192.168.56.1:4782

Mutex

70b15695-83fa-49d5-9ab7-d6837c0bfe04

Attributes

encryption_key
CE951E8DBE6E2FB19D206CC546AB1C2DB4750281
install_name
Client.exe
log_directory
Logs
reconnect_delay
1
startup_key
Solara
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/2400-1-0x0000000001070000-0x0000000001394000-memory.dmp	family_quasar
behavioral1/files/0x00080000000164db-6.dat	family_quasar
behavioral1/memory/2528-9-0x0000000000970000-0x0000000000C94000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2528	Client.exe

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
2152	schtasks.exe
1960	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2400	rdew23.exe
Token: SeDebugPrivilege	2528	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2528	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2400 wrote to memory of 2152	2400	rdew23.exe	30
PID 2400 wrote to memory of 2152	2400	rdew23.exe	30
PID 2400 wrote to memory of 2152	2400	rdew23.exe	30
PID 2400 wrote to memory of 2528	2400	rdew23.exe	32
PID 2400 wrote to memory of 2528	2400	rdew23.exe	32
PID 2400 wrote to memory of 2528	2400	rdew23.exe	32
PID 2528 wrote to memory of 1960	2528	Client.exe	33
PID 2528 wrote to memory of 1960	2528	Client.exe	33
PID 2528 wrote to memory of 1960	2528	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\rdew23.exe
"C:\Users\Admin\AppData\Local\Temp\rdew23.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2400
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Solara" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2152
- 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:2528
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Solara" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1960

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

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
fc96b0bb5bf41de7f1098763e7c6c121

SHA1
c86dbf100916664e69644fe4e182c30d7fd9d94b

SHA256
180566813d8fd45aa00cd44907b262d0b153f48a3915eca64b1c42a17786cbbe

SHA512
9966fa53e17290b2d6d51e4915d86429da85d1125b3f180c4881c5fbd85d08cb861b1ba06b9b6b972b44d7ee20748eba702fca6bffdc5b7b9d48401fb2d0e661

Download Submit
memory/2400-0-0x000007FEF57A3000-0x000007FEF57A4000-memory.dmp

Filesize
4KB

Download
memory/2400-1-0x0000000001070000-0x0000000001394000-memory.dmp

Filesize
3.1MB

Download
memory/2400-2-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2400-8-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2528-9-0x0000000000970000-0x0000000000C94000-memory.dmp

Filesize
3.1MB

Download
memory/2528-10-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2528-11-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2528-12-0x000007FEF57A0000-0x000007FEF618C000-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