quasar | 5dc04f49cc08036074442e70c96c22fe5fd2f2f0c5d1a051d4cb0a523ca5a8ef

General

Target

Client-built.exe
Size

3.1MB
MD5

56bcee0e020cd6b2722441019e94a3c1
SHA1

f3f7db5152a241e575bf18018d08c2ca75219650
SHA256

5dc04f49cc08036074442e70c96c22fe5fd2f2f0c5d1a051d4cb0a523ca5a8ef
SHA512

d29444d96f74c3584164cb147f83b1957cd9f4412399665df74ae7bbddaba799318f73e5aad120c91ecb64a6d202dd8ff7eff620539626095da5e32b28e4f877
SSDEEP

49152:PvulL26AaNeWgPhlmVqvMQ7XSKTTRJ6bbR3LoGdW4THHB72eh2NT:PveL26AaNeWgPhlmVqkQ7XSKTTRJ6t

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

paris-pixels.gl.at.ply.gg:14754

Mutex

bdf966fd-92ab-4536-9c2b-6e6c94f99130

Attributes

encryption_key
95DD5E4EAA3DC0591E2F7A87C78A608435400057
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
some Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral1/memory/4064-1-0x0000000000250000-0x0000000000574000-memory.dmp	family_quasar
behavioral1/files/0x001d00000002aae7-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4972	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
3588	schtasks.exe
572	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4064	Client-built.exe
Token: SeDebugPrivilege	4972	Client.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
4972	Client.exe
4972	Client.exe

Suspicious use of SendNotifyMessage 2 IoCs

pid	Process
4972	Client.exe
4972	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4972	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4064 wrote to memory of 572	4064	Client-built.exe	77
PID 4064 wrote to memory of 572	4064	Client-built.exe	77
PID 4064 wrote to memory of 4972	4064	Client-built.exe	79
PID 4064 wrote to memory of 4972	4064	Client-built.exe	79
PID 4972 wrote to memory of 3588	4972	Client.exe	80
PID 4972 wrote to memory of 3588	4972	Client.exe	80

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:4064
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "some Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:572
- 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:4972
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "some Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3588

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
56bcee0e020cd6b2722441019e94a3c1

SHA1
f3f7db5152a241e575bf18018d08c2ca75219650

SHA256
5dc04f49cc08036074442e70c96c22fe5fd2f2f0c5d1a051d4cb0a523ca5a8ef

SHA512
d29444d96f74c3584164cb147f83b1957cd9f4412399665df74ae7bbddaba799318f73e5aad120c91ecb64a6d202dd8ff7eff620539626095da5e32b28e4f877

Download Submit
memory/4064-0-0x00007FFF1FA13000-0x00007FFF1FA15000-memory.dmp

Filesize
8KB

Download
memory/4064-1-0x0000000000250000-0x0000000000574000-memory.dmp

Filesize
3.1MB

Download
memory/4064-2-0x00007FFF1FA10000-0x00007FFF204D2000-memory.dmp

Filesize
10.8MB

Download
memory/4064-9-0x00007FFF1FA10000-0x00007FFF204D2000-memory.dmp

Filesize
10.8MB

Download
memory/4972-10-0x00007FFF1FA10000-0x00007FFF204D2000-memory.dmp

Filesize
10.8MB

Download
memory/4972-11-0x00007FFF1FA10000-0x00007FFF204D2000-memory.dmp

Filesize
10.8MB

Download
memory/4972-12-0x000000001C6D0000-0x000000001C720000-memory.dmp

Filesize
320KB

Download
memory/4972-13-0x000000001C7E0000-0x000000001C892000-memory.dmp

Filesize
712KB

Download
memory/4972-16-0x000000001C770000-0x000000001C782000-memory.dmp

Filesize
72KB

Download
memory/4972-17-0x000000001CEF0000-0x000000001CF2C000-memory.dmp

Filesize
240KB

Download
memory/4972-18-0x00007FFF1FA10000-0x00007FFF204D2000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads