quasar | 300bad38953dd87cda952bb60f1999a5ea1f9c0f64a3f0f842633b982b15194b

General

Target

Windows-Activation.exe
Size

3.1MB
MD5

ae747de0584eeab55957aa8ec12ba488
SHA1

41483b8e1ff488a546e08de74ac09300fe63c80b
SHA256

300bad38953dd87cda952bb60f1999a5ea1f9c0f64a3f0f842633b982b15194b
SHA512

f744156f05ebe0adbbe0e3973783e60e0d2b98ea8c33a147f0e1afe1cdd749b994453b7da4f8c45c73af0569453f85dacddde57820aa1f9a94e3f7350445b68c
SSDEEP

49152:evBt62XlaSFNWPjljiFa2RoUYIRetwHBxjooGd33THHB72eh2NT:evr62XlaSFNWPjljiFXRoUYIyw4

Score

10^/10

quasar svchost.exe spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Svchost.exe

C2

192.168.1.190:4782

Mutex

75ec4d04-9201-465b-9d52-07fbf8901610

Attributes

encryption_key
BC9F0EB6E1FA6B8559DDF8DE0AEF08110EBCF8E5
install_name
Svchostt.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Svchostt.exe

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/3032-1-0x0000000000B80000-0x0000000000EA4000-memory.dmp	family_quasar
behavioral1/files/0x000a0000000120d5-6.dat	family_quasar
behavioral1/memory/2200-10-0x0000000000AC0000-0x0000000000DE4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2200	Svchostt.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\system32\Svchostt.exe	Windows-Activation.exe
File opened for modification	C:\Windows\system32\Svchostt.exe	Windows-Activation.exe
File opened for modification	C:\Windows\system32\Svchostt.exe	Svchostt.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
2192	schtasks.exe
2480	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3032	Windows-Activation.exe
Token: SeDebugPrivilege	2200	Svchostt.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2200	Svchostt.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3032 wrote to memory of 2192	3032	Windows-Activation.exe	30
PID 3032 wrote to memory of 2192	3032	Windows-Activation.exe	30
PID 3032 wrote to memory of 2192	3032	Windows-Activation.exe	30
PID 3032 wrote to memory of 2200	3032	Windows-Activation.exe	32
PID 3032 wrote to memory of 2200	3032	Windows-Activation.exe	32
PID 3032 wrote to memory of 2200	3032	Windows-Activation.exe	32
PID 2200 wrote to memory of 2480	2200	Svchostt.exe	33
PID 2200 wrote to memory of 2480	2200	Svchostt.exe	33
PID 2200 wrote to memory of 2480	2200	Svchostt.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\Windows-Activation.exe
"C:\Users\Admin\AppData\Local\Temp\Windows-Activation.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3032
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Svchostt.exe" /sc ONLOGON /tr "C:\Windows\system32\Svchostt.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2192
- C:\Windows\system32\Svchostt.exe
  "C:\Windows\system32\Svchostt.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2200
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Svchostt.exe" /sc ONLOGON /tr "C:\Windows\system32\Svchostt.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2480

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Windows\System32\Svchostt.exe

Filesize
3.1MB

MD5
ae747de0584eeab55957aa8ec12ba488

SHA1
41483b8e1ff488a546e08de74ac09300fe63c80b

SHA256
300bad38953dd87cda952bb60f1999a5ea1f9c0f64a3f0f842633b982b15194b

SHA512
f744156f05ebe0adbbe0e3973783e60e0d2b98ea8c33a147f0e1afe1cdd749b994453b7da4f8c45c73af0569453f85dacddde57820aa1f9a94e3f7350445b68c

Download Submit
memory/2200-8-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/2200-10-0x0000000000AC0000-0x0000000000DE4000-memory.dmp

Filesize
3.1MB

Download
memory/2200-11-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/2200-12-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/3032-0-0x000007FEF5433000-0x000007FEF5434000-memory.dmp

Filesize
4KB

Download
memory/3032-1-0x0000000000B80000-0x0000000000EA4000-memory.dmp

Filesize
3.1MB

Download
memory/3032-2-0x000007FEF5430000-0x000007FEF5E1C000-memory.dmp

Filesize
9.9MB

Download
memory/3032-9-0x000007FEF5430000-0x000007FEF5E1C000-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