quasar | 288aecc0412bf4f5adf5bce0d9cc9e2c8a47df3767bc3fbf60d955341f0b2ff0

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
31/03/2024, 01:52

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General

Target
c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582.exe
Size 3.1MB
Sample240331-cajj3acb86
SHA256 c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582
MD5 c4497b459274cec0b9fd6e3ac6c67aaa
SHA1 1c8b8e42b8284b6dc2d2741850a9c01c07a5088f
SHA512 bf64fd7a95dedd703a04cf661b35ebaa343dd7b2e907d1de20d16bcb91259b76ba9f80a817d391487eb5c4f549658ba545673b3b3f26cc45e0a16fecfff01c24
SSDEEP 49152:Cvguf2NUaNmwzPWlvdaKM7ZxTwW3xbbRYLoGd7THHB72eh2NT:Cv/f2NUaNmwzPWlvdaB7ZxTwW3xQ
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar 50 installs spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

50 installs

217.63.234.90:4444
217.63.234.90:1313
127.0.0.1:1313

Mutex

ef23a66e-d8e1-48c7-a533-50e2b78bea4a

Attributes

encryption_key
6B0D9CDFBF22251A89F554E059B7463C8CDE0F0C
install_name
svchost.exe
log_directory
Logs50spread
reconnect_delay
3000
startup_key
svchost.exe
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/3000-0-0x0000000000C60000-0x0000000000F84000-memory.dmp	family_quasar
behavioral2/files/0x000700000002320d-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2928	svchost.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
3756	schtasks.exe
2740	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3000	c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582.exe
Token: SeDebugPrivilege	2928	svchost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3000 wrote to memory of 3756	3000	c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582.exe	89
PID 3000 wrote to memory of 3756	3000	c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582.exe	89
PID 3000 wrote to memory of 2928	3000	c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582.exe	91
PID 3000 wrote to memory of 2928	3000	c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582.exe	91
PID 2928 wrote to memory of 2740	2928	svchost.exe	92
PID 2928 wrote to memory of 2740	2928	svchost.exe	92

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\c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582.exe
"C:\Users\Admin\AppData\Local\Temp\c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3000
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "svchost.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3756
- C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2928
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "svchost.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:2740

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

svchost.exe

Path C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe
Size 3.1MB
SHA256 c88caddc2a450135e7f7d36d8b9857628b96f97b67d782025b229034d34f9582
MD5 c4497b459274cec0b9fd6e3ac6c67aaa
SHA1 1c8b8e42b8284b6dc2d2741850a9c01c07a5088f
SHA512 bf64fd7a95dedd703a04cf661b35ebaa343dd7b2e907d1de20d16bcb91259b76ba9f80a817d391487eb5c4f549658ba545673b3b3f26cc45e0a16fecfff01c24
SSDEEP 49152:Cvguf2NUaNmwzPWlvdaKM7ZxTwW3xbbRYLoGd7THHB72eh2NT:Cv/f2NUaNmwzPWlvdaB7ZxTwW3xQ
MD5 SHA1 SHA512 SSDEEP

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memory/2928-9-0x00007FFB16A40000-0x00007FFB17501000-memory.dmp

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memory/2928-11-0x000000001BBA0000-0x000000001BBF0000-memory.dmp

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memory/2928-12-0x000000001D0C0000-0x000000001D172000-memory.dmp

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memory/2928-13-0x00007FFB16A40000-0x00007FFB17501000-memory.dmp

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memory/3000-0-0x0000000000C60000-0x0000000000F84000-memory.dmp

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memory/3000-1-0x00007FFB16A40000-0x00007FFB17501000-memory.dmp

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memory/3000-2-0x0000000003120000-0x0000000003130000-memory.dmp

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memory/3000-10-0x00007FFB16A40000-0x00007FFB17501000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads