quasar | e4d9649035fca11b0766b1029de6566a201c0a4fe21aa78d47c6898aba84080e

Analysis

max time kernel
127s
max time network
136s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
09-12-2024 13:06

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General

Target

Undetected-Lafof/Undetected.exe
Size

3.1MB
MD5

f6e06b3a3d6d3c02e1dc0c335e549776
SHA1

84ce095f1b57a7510d486b7ac232875c12c083c6
SHA256

9345d4eca428001835be594a4f6e3f91c5e86129b4ae45e219bbb128ed0c85dd
SHA512

cbe570b7e1e93b31fe2733e9664d1f832953c74a7493c03ddbd8c84673f6e357cbd83c4304c3e9ba7cab529d17c0b2c863b6ae818a00acbb3ce2aeaec1f7e59f
SSDEEP

49152:rvyI22SsaNYfdPBldt698dBcjHRkRJ6PbR3LoGdpTHHB72eh2NT:rvf22SsaNYfdPBldt6+dBcjHRkRJ6h

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

192.168.178.56:4782

Mutex

034bc834-00a3-43a2-914f-e7e2e3cca885

Attributes

encryption_key
A1FC9406EA7EC68BA96F23A68CD076A4EDC6270C
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
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/2736-9-0x0000000000AF0000-0x0000000000E14000-memory.dmp	family_quasar
behavioral1/files/0x0009000000015ccf-7.dat	family_quasar
behavioral1/memory/3052-1-0x0000000001220000-0x0000000001544000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2736	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
2444	schtasks.exe
2760	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3052	Undetected.exe
Token: SeDebugPrivilege	2736	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2736	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3052 wrote to memory of 2444	3052	Undetected.exe	31
PID 3052 wrote to memory of 2444	3052	Undetected.exe	31
PID 3052 wrote to memory of 2444	3052	Undetected.exe	31
PID 3052 wrote to memory of 2736	3052	Undetected.exe	33
PID 3052 wrote to memory of 2736	3052	Undetected.exe	33
PID 3052 wrote to memory of 2736	3052	Undetected.exe	33
PID 2736 wrote to memory of 2760	2736	Client.exe	34
PID 2736 wrote to memory of 2760	2736	Client.exe	34
PID 2736 wrote to memory of 2760	2736	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\Undetected-Lafof\Undetected.exe
"C:\Users\Admin\AppData\Local\Temp\Undetected-Lafof\Undetected.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3052
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2444
- 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:2736
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2760

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
f6e06b3a3d6d3c02e1dc0c335e549776

SHA1
84ce095f1b57a7510d486b7ac232875c12c083c6

SHA256
9345d4eca428001835be594a4f6e3f91c5e86129b4ae45e219bbb128ed0c85dd

SHA512
cbe570b7e1e93b31fe2733e9664d1f832953c74a7493c03ddbd8c84673f6e357cbd83c4304c3e9ba7cab529d17c0b2c863b6ae818a00acbb3ce2aeaec1f7e59f

Download Submit
memory/2736-11-0x000007FEF5290000-0x000007FEF5C7C000-memory.dmp

Filesize
9.9MB

Download
memory/2736-9-0x0000000000AF0000-0x0000000000E14000-memory.dmp

Filesize
3.1MB

Download
memory/2736-8-0x000007FEF5290000-0x000007FEF5C7C000-memory.dmp

Filesize
9.9MB

Download
memory/2736-12-0x000007FEF5290000-0x000007FEF5C7C000-memory.dmp

Filesize
9.9MB

Download
memory/3052-10-0x000007FEF5290000-0x000007FEF5C7C000-memory.dmp

Filesize
9.9MB

Download
memory/3052-2-0x000007FEF5290000-0x000007FEF5C7C000-memory.dmp

Filesize
9.9MB

Download
memory/3052-1-0x0000000001220000-0x0000000001544000-memory.dmp

Filesize
3.1MB

Download
memory/3052-0-0x000007FEF5293000-0x000007FEF5294000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads