quasar | 098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6

General

Target

098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6.exe
Size

3.4MB
MD5

8b2e0fa65ef1b87ffcc3ca43ddab5eb8
SHA1

89c584fa347a1e9b9caa3205f37b67d4bdf47fcc
SHA256

098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6
SHA512

3d5eec18d870a104389e0e628e01ae3fdd372e65a3b7a0eb33fbc99965e3b6cd8e51cccf208041e0f6a3be55764286bf855e10c0792982cf458a8633ff29cbce
SSDEEP

49152:TvEuf2NUaNmwzPWlvdaKM7ZxTwR873dar7joGdyTHHB72eh2NT:Tvzf2NUaNmwzPWlvdaB7ZxTwS3S

Score

10^/10

quasar winlogson spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

winlogson

C2

192.168.178.69:4782

coluich1220.duckdns.org:4782

Mutex

a409f48d-fe2a-4207-b2c2-585b18fb47b3

Attributes

encryption_key
4A886EE72F3932EB3311C152EDED110A81EF6553
install_name
winlogson.exe
log_directory
Logs
reconnect_delay
3000
startup_key
winlogson
subdirectory
winlogson

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/1152-1-0x0000000000280000-0x00000000005E0000-memory.dmp	family_quasar
behavioral1/files/0x0008000000015fc4-6.dat	family_quasar
behavioral1/memory/2364-9-0x0000000000B90000-0x0000000000EF0000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2364	winlogson.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\winlogson	098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6.exe
File opened for modification	C:\Windows\system32\winlogson\winlogson.exe	winlogson.exe
File opened for modification	C:\Windows\system32\winlogson	winlogson.exe
File created	C:\Windows\system32\winlogson\winlogson.exe	098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6.exe
File opened for modification	C:\Windows\system32\winlogson\winlogson.exe	098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6.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
2508	schtasks.exe
2340	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1152	098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6.exe
Token: SeDebugPrivilege	2364	winlogson.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2364	winlogson.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1152 wrote to memory of 2508	1152	098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6.exe	30
PID 1152 wrote to memory of 2508	1152	098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6.exe	30
PID 1152 wrote to memory of 2508	1152	098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6.exe	30
PID 1152 wrote to memory of 2364	1152	098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6.exe	32
PID 1152 wrote to memory of 2364	1152	098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6.exe	32
PID 1152 wrote to memory of 2364	1152	098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6.exe	32
PID 2364 wrote to memory of 2340	2364	winlogson.exe	33
PID 2364 wrote to memory of 2340	2364	winlogson.exe	33
PID 2364 wrote to memory of 2340	2364	winlogson.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\098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6.exe
"C:\Users\Admin\AppData\Local\Temp\098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1152
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "winlogson" /sc ONLOGON /tr "C:\Windows\system32\winlogson\winlogson.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2508
- C:\Windows\system32\winlogson\winlogson.exe
  "C:\Windows\system32\winlogson\winlogson.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2364
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "winlogson" /sc ONLOGON /tr "C:\Windows\system32\winlogson\winlogson.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2340

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\winlogson\winlogson.exe

Filesize
3.4MB

MD5
8b2e0fa65ef1b87ffcc3ca43ddab5eb8

SHA1
89c584fa347a1e9b9caa3205f37b67d4bdf47fcc

SHA256
098f75d091ae6473dce8b06216ab154737468869375e35e5949e39904dbe71e6

SHA512
3d5eec18d870a104389e0e628e01ae3fdd372e65a3b7a0eb33fbc99965e3b6cd8e51cccf208041e0f6a3be55764286bf855e10c0792982cf458a8633ff29cbce

Download Submit
memory/1152-0-0x000007FEF5CD3000-0x000007FEF5CD4000-memory.dmp

Filesize
4KB

Download
memory/1152-1-0x0000000000280000-0x00000000005E0000-memory.dmp

Filesize
3.4MB

Download
memory/1152-2-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/1152-8-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/2364-10-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/2364-9-0x0000000000B90000-0x0000000000EF0000-memory.dmp

Filesize
3.4MB

Download
memory/2364-11-0x000007FEF5CD0000-0x000007FEF66BC000-memory.dmp

Filesize
9.9MB

Download
memory/2364-12-0x000007FEF5CD0000-0x000007FEF66BC000-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