quasar | 83e0d63d5121160a9251331b4555350971eaeadfa31387d1e996689cbcd6b877

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
16-01-2025 00:30

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General

Target

Client-built.exe
Size

3.1MB
MD5

09aeaab89c707b3844cf6360e21fc2c5
SHA1

9f594050887f3e9917643d88cfc0980867da2abd
SHA256

83e0d63d5121160a9251331b4555350971eaeadfa31387d1e996689cbcd6b877
SHA512

d5eefd2a16b733993a1ed1f3b4a28975ae3e8880a2090e3f70ad5337c748739ae312950dda95363eb6c6d6b324e97fec5a19b0d2feb357f119e38f0d9fcb03ec
SSDEEP

49152:avaY52fyaSZOrPWluWBuGG5g5hPiRJ6xbR3LoGdUTHHB72eh2NT:avv52fyaSZOrPWluWBDG5g5hPiRJ6T

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

10.0.0.85:4782

Mutex

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

Attributes

encryption_key
CE951E8DBE6E2FB19D206CC546AB1C2DB4750281
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
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/2284-1-0x0000000000E10000-0x0000000001134000-memory.dmp	family_quasar
behavioral1/files/0x00060000000191fd-6.dat	family_quasar
behavioral1/memory/3016-9-0x00000000003E0000-0x0000000000704000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3016	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
2840	schtasks.exe
2864	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2284	Client-built.exe
Token: SeDebugPrivilege	3016	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3016	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2284 wrote to memory of 2840	2284	Client-built.exe	31
PID 2284 wrote to memory of 2840	2284	Client-built.exe	31
PID 2284 wrote to memory of 2840	2284	Client-built.exe	31
PID 2284 wrote to memory of 3016	2284	Client-built.exe	33
PID 2284 wrote to memory of 3016	2284	Client-built.exe	33
PID 2284 wrote to memory of 3016	2284	Client-built.exe	33
PID 3016 wrote to memory of 2864	3016	Client.exe	34
PID 3016 wrote to memory of 2864	3016	Client.exe	34
PID 3016 wrote to memory of 2864	3016	Client.exe	34

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2284
- 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:2840
- 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:3016
- - 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:2864

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
09aeaab89c707b3844cf6360e21fc2c5

SHA1
9f594050887f3e9917643d88cfc0980867da2abd

SHA256
83e0d63d5121160a9251331b4555350971eaeadfa31387d1e996689cbcd6b877

SHA512
d5eefd2a16b733993a1ed1f3b4a28975ae3e8880a2090e3f70ad5337c748739ae312950dda95363eb6c6d6b324e97fec5a19b0d2feb357f119e38f0d9fcb03ec

Download Submit
memory/2284-0-0x000007FEF55E3000-0x000007FEF55E4000-memory.dmp

Filesize
4KB

Download
memory/2284-1-0x0000000000E10000-0x0000000001134000-memory.dmp

Filesize
3.1MB

Download
memory/2284-2-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/2284-8-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/3016-10-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/3016-11-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/3016-9-0x00000000003E0000-0x0000000000704000-memory.dmp

Filesize
3.1MB

Download
memory/3016-12-0x000007FEF55E0000-0x000007FEF5FCC000-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