quasar | b1949d403caba3fc8addc1779b003b18fd9744f075dc9002213aa4104cdbbac1

Analysis

max time kernel
101s
max time network
104s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
07-12-2024 14:52

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General

Target

Client-built.exe
Size

3.1MB
MD5

00c08053c9ec8b1575cc1dc37454ef36
SHA1

a41c5e4a0a07eaf751068543c0892451b06a17a1
SHA256

b1949d403caba3fc8addc1779b003b18fd9744f075dc9002213aa4104cdbbac1
SHA512

eaeefc1bdf1c4a1c98e0befced54a6dc83a1598f9d409bae6c0876447c832171e418a16b0be210d7223ee256a4f85946fdf4c4ddc7b3d6981c5ea23ef9d8998b
SSDEEP

98304:Pvm42pda6D+/PjlLOlZyQipVJ9RJ6I5a:nyOpTV5a

Score

10^/10

quasar thecoolfile spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

thecoolfile

dfsgmnhsrf23456623423456-51636.portmap.host:51636

Mutex

ba019940-beb5-4159-a5b2-ce0bc35ac066

Attributes

encryption_key
B42CE86AEBA4D8818352F4D811EA7BBB472E229A
install_name
windows defender.exe
log_directory
Logs
reconnect_delay
3000
startup_key
discord
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/1692-1-0x00000000010C0000-0x00000000013E4000-memory.dmp	family_quasar
behavioral1/files/0x0038000000012275-6.dat	family_quasar
behavioral1/memory/2744-9-0x00000000013E0000-0x0000000001704000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2744	windows defender.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
2796	schtasks.exe
2848	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1692	Client-built.exe
Token: SeDebugPrivilege	2744	windows defender.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2744	windows defender.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1692 wrote to memory of 2796	1692	Client-built.exe	30
PID 1692 wrote to memory of 2796	1692	Client-built.exe	30
PID 1692 wrote to memory of 2796	1692	Client-built.exe	30
PID 1692 wrote to memory of 2744	1692	Client-built.exe	32
PID 1692 wrote to memory of 2744	1692	Client-built.exe	32
PID 1692 wrote to memory of 2744	1692	Client-built.exe	32
PID 2744 wrote to memory of 2848	2744	windows defender.exe	33
PID 2744 wrote to memory of 2848	2744	windows defender.exe	33
PID 2744 wrote to memory of 2848	2744	windows defender.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:1692
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "discord" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windows defender.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2796
- C:\Users\Admin\AppData\Roaming\SubDir\windows defender.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\windows defender.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2744
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "discord" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\windows defender.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2848

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\windows defender.exe

Filesize
3.1MB

MD5
00c08053c9ec8b1575cc1dc37454ef36

SHA1
a41c5e4a0a07eaf751068543c0892451b06a17a1

SHA256
b1949d403caba3fc8addc1779b003b18fd9744f075dc9002213aa4104cdbbac1

SHA512
eaeefc1bdf1c4a1c98e0befced54a6dc83a1598f9d409bae6c0876447c832171e418a16b0be210d7223ee256a4f85946fdf4c4ddc7b3d6981c5ea23ef9d8998b

Download Submit
memory/1692-0-0x000007FEF55A3000-0x000007FEF55A4000-memory.dmp

Filesize
4KB

Download
memory/1692-1-0x00000000010C0000-0x00000000013E4000-memory.dmp

Filesize
3.1MB

Download
memory/1692-2-0x000007FEF55A0000-0x000007FEF5F8C000-memory.dmp

Filesize
9.9MB

Download
memory/1692-8-0x000007FEF55A0000-0x000007FEF5F8C000-memory.dmp

Filesize
9.9MB

Download
memory/2744-9-0x00000000013E0000-0x0000000001704000-memory.dmp

Filesize
3.1MB

Download
memory/2744-10-0x000007FEF55A0000-0x000007FEF5F8C000-memory.dmp

Filesize
9.9MB

Download
memory/2744-11-0x000007FEF55A0000-0x000007FEF5F8C000-memory.dmp

Filesize
9.9MB

Download
memory/2744-12-0x000007FEF55A0000-0x000007FEF5F8C000-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