quasar | 760900c54d8de9c15d683400c4c1969c386f22b2dbbecd4163b93dd0112af4a6

General

Target

discord.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/3068-1-0x0000000000880000-0x0000000000BA4000-memory.dmp	family_quasar
behavioral1/files/0x000900000001749c-6.dat	family_quasar
behavioral1/memory/3004-9-0x0000000000F60000-0x0000000001284000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3004	main-pc.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\SubDir	main-pc.exe
File created	C:\Windows\system32\SubDir\main-pc.exe	discord.exe
File opened for modification	C:\Windows\system32\SubDir\main-pc.exe	discord.exe
File opened for modification	C:\Windows\system32\SubDir	discord.exe
File opened for modification	C:\Windows\system32\SubDir\main-pc.exe	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
2232	schtasks.exe
2352	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3068	discord.exe
Token: SeDebugPrivilege	3004	main-pc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3004	main-pc.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 2232	3068	discord.exe	30
PID 3068 wrote to memory of 2232	3068	discord.exe	30
PID 3068 wrote to memory of 2232	3068	discord.exe	30
PID 3068 wrote to memory of 3004	3068	discord.exe	32
PID 3068 wrote to memory of 3004	3068	discord.exe	32
PID 3068 wrote to memory of 3004	3068	discord.exe	32
PID 3004 wrote to memory of 2352	3004	main-pc.exe	33
PID 3004 wrote to memory of 2352	3004	main-pc.exe	33
PID 3004 wrote to memory of 2352	3004	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\discord.exe
"C:\Users\Admin\AppData\Local\Temp\discord.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3068
- 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:2232
- 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:3004
- - 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:2352

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/3004-9-0x0000000000F60000-0x0000000001284000-memory.dmp

Filesize
3.1MB

Download
memory/3004-10-0x000007FEF5D50000-0x000007FEF673C000-memory.dmp

Filesize
9.9MB

Download
memory/3004-11-0x000007FEF5D50000-0x000007FEF673C000-memory.dmp

Filesize
9.9MB

Download
memory/3004-12-0x000007FEF5D50000-0x000007FEF673C000-memory.dmp

Filesize
9.9MB

Download
memory/3068-0-0x000007FEF5D53000-0x000007FEF5D54000-memory.dmp

Filesize
4KB

Download
memory/3068-1-0x0000000000880000-0x0000000000BA4000-memory.dmp

Filesize
3.1MB

Download
memory/3068-2-0x000007FEF5D50000-0x000007FEF673C000-memory.dmp

Filesize
9.9MB

Download
memory/3068-8-0x000007FEF5D50000-0x000007FEF673C000-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