quasar | 6872f02318d5f28b83c7a19dab208002c06bc3261b8af28ce5ab46c5048e342b

Analysis

max time kernel
150s
max time network
147s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
17-12-2024 22:12

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General

Target

Client-built.exe
Size

3.1MB
MD5

b460be0db90b88f054f802bcb15c3085
SHA1

b3b4faa9d76b3b7c1a595d86b72105b9e42c564e
SHA256

6872f02318d5f28b83c7a19dab208002c06bc3261b8af28ce5ab46c5048e342b
SHA512

86b9d397e1320c960871d97dbb7fcc02a59bddd8b4fb9d9094a08856e8b6266fd525cbb89c857ba1907f356f4172bca9fdfefc0b26da47c7fb7e8d82ebb845f0
SSDEEP

49152:LvilL26AaNeWgPhlmVqvMQ7XSKYWBCpfoGdD4THHB72eh2NT:LvaL26AaNeWgPhlmVqkQ7XSKYWBCZ

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

science-attract.gl.at.ply.gg:4444

Mutex

6ad33fe9-6ed2-45c9-940d-96954b1558e6

Attributes

encryption_key
E040A051368780825E373BF53836EF5E3A5FBF62
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
WindowsDefender.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/2092-1-0x00000000010F0000-0x0000000001414000-memory.dmp	family_quasar
behavioral1/files/0x00080000000164db-6.dat	family_quasar
behavioral1/memory/2544-9-0x0000000000BB0000-0x0000000000ED4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2544	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
1640	schtasks.exe
2712	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2092	Client-built.exe
Token: SeDebugPrivilege	2544	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2092 wrote to memory of 1640	2092	Client-built.exe	30
PID 2092 wrote to memory of 1640	2092	Client-built.exe	30
PID 2092 wrote to memory of 1640	2092	Client-built.exe	30
PID 2092 wrote to memory of 2544	2092	Client-built.exe	32
PID 2092 wrote to memory of 2544	2092	Client-built.exe	32
PID 2092 wrote to memory of 2544	2092	Client-built.exe	32
PID 2544 wrote to memory of 2712	2544	Client.exe	33
PID 2544 wrote to memory of 2712	2544	Client.exe	33
PID 2544 wrote to memory of 2712	2544	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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2092
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "WindowsDefender.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1640
- 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 WriteProcessMemory
  PID:2544
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "WindowsDefender.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2712

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
b460be0db90b88f054f802bcb15c3085

SHA1
b3b4faa9d76b3b7c1a595d86b72105b9e42c564e

SHA256
6872f02318d5f28b83c7a19dab208002c06bc3261b8af28ce5ab46c5048e342b

SHA512
86b9d397e1320c960871d97dbb7fcc02a59bddd8b4fb9d9094a08856e8b6266fd525cbb89c857ba1907f356f4172bca9fdfefc0b26da47c7fb7e8d82ebb845f0

Download Submit
memory/2092-0-0x000007FEF57A3000-0x000007FEF57A4000-memory.dmp

Filesize
4KB

Download
memory/2092-1-0x00000000010F0000-0x0000000001414000-memory.dmp

Filesize
3.1MB

Download
memory/2092-2-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2092-8-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2544-11-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2544-10-0x000007FEF57A0000-0x000007FEF618C000-memory.dmp

Filesize
9.9MB

Download
memory/2544-9-0x0000000000BB0000-0x0000000000ED4000-memory.dmp

Filesize
3.1MB

Download
memory/2544-12-0x000007FEF57A0000-0x000007FEF618C000-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