quasar | 760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6

General

Target

760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6.exe
Size

3.1MB
MD5

46bb433e514cfe4b33341703a53f54cb
SHA1

54f697ea24a9da0dcd53fc6e3c5dfe5dc5a90170
SHA256

760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6
SHA512

30d07b31ab8697f4cab21f1adaa1e81a6cc93192fca844f3a7693befa4c6d385c248786091f7a579cf16b7faf316e29d14ebd7765697598f9ff1ef7fdcfb1267
SSDEEP

49152:bvXI22SsaNYfdPBldt698dBcjHIFRJ6bbR3LoGdPpTHHB72eh2NT:bvY22SsaNYfdPBldt6+dBcjHIFRJ6t

Score

10^/10

quasar main-pc spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

main-pc

C2

192.168.100.2:4444

Mutex

979e9520-ec25-48f6-8cd4-516d1007358f

Attributes

encryption_key
6B74F0C858B7E90573D4E97997F2A082B9781250
install_name
main-pc.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Microsoft Service
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/1732-1-0x0000000000AD0000-0x0000000000DF4000-memory.dmp	family_quasar
behavioral1/files/0x000a000000015d79-6.dat	family_quasar
behavioral1/memory/2240-8-0x0000000000FB0000-0x00000000012D4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2240	main-pc.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\system32\SubDir\main-pc.exe	760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6.exe
File opened for modification	C:\Windows\system32\SubDir\main-pc.exe	760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6.exe
File opened for modification	C:\Windows\system32\SubDir	760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6.exe
File opened for modification	C:\Windows\system32\SubDir\main-pc.exe	main-pc.exe
File opened for modification	C:\Windows\system32\SubDir	main-pc.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
1880	schtasks.exe
2476	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1732	760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6.exe
Token: SeDebugPrivilege	2240	main-pc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2240	main-pc.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1732 wrote to memory of 1880	1732	760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6.exe	30
PID 1732 wrote to memory of 1880	1732	760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6.exe	30
PID 1732 wrote to memory of 1880	1732	760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6.exe	30
PID 1732 wrote to memory of 2240	1732	760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6.exe	32
PID 1732 wrote to memory of 2240	1732	760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6.exe	32
PID 1732 wrote to memory of 2240	1732	760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6.exe	32
PID 2240 wrote to memory of 2476	2240	main-pc.exe	33
PID 2240 wrote to memory of 2476	2240	main-pc.exe	33
PID 2240 wrote to memory of 2476	2240	main-pc.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\760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6.exe
"C:\Users\Admin\AppData\Local\Temp\760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1732
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "Microsoft Service" /sc ONLOGON /tr "C:\Windows\system32\SubDir\main-pc.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1880
- C:\Windows\system32\SubDir\main-pc.exe
  "C:\Windows\system32\SubDir\main-pc.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2240
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "Microsoft Service" /sc ONLOGON /tr "C:\Windows\system32\SubDir\main-pc.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2476

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\SubDir\main-pc.exe

Filesize
3.1MB

MD5
46bb433e514cfe4b33341703a53f54cb

SHA1
54f697ea24a9da0dcd53fc6e3c5dfe5dc5a90170

SHA256
760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6

SHA512
30d07b31ab8697f4cab21f1adaa1e81a6cc93192fca844f3a7693befa4c6d385c248786091f7a579cf16b7faf316e29d14ebd7765697598f9ff1ef7fdcfb1267

Download Submit
memory/1732-0-0x000007FEF5313000-0x000007FEF5314000-memory.dmp

Filesize
4KB

Download
memory/1732-1-0x0000000000AD0000-0x0000000000DF4000-memory.dmp

Filesize
3.1MB

Download
memory/1732-2-0x000007FEF5310000-0x000007FEF5CFC000-memory.dmp

Filesize
9.9MB

Download
memory/1732-11-0x000007FEF5310000-0x000007FEF5CFC000-memory.dmp

Filesize
9.9MB

Download
memory/2240-9-0x000007FEF5310000-0x000007FEF5CFC000-memory.dmp

Filesize
9.9MB

Download
memory/2240-10-0x000007FEF5310000-0x000007FEF5CFC000-memory.dmp

Filesize
9.9MB

Download
memory/2240-8-0x0000000000FB0000-0x00000000012D4000-memory.dmp

Filesize
3.1MB

Download
memory/2240-12-0x000007FEF5310000-0x000007FEF5CFC000-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