quasar | 812c0beafd8928e2aa6410d1889acecf6b4213614d3fadbfc3fbba295932c9c3

General

Target

SpotifyLauncher.exe
Size

3.1MB
MD5

459bd1f40deff63df61baa82b8c053b3
SHA1

e08e35044bf8f73b67e54901ad37a4edf33fc319
SHA256

812c0beafd8928e2aa6410d1889acecf6b4213614d3fadbfc3fbba295932c9c3
SHA512

4232cf3ef7fe0e199a9e673ce785ecdd313ebdd5104d0a016105c7a76d77c350bac623e33d794255b04d989c12436d42850ef95b68452f04f9a7c6109c44130b
SSDEEP

49152:+vkt62XlaSFNWPjljiFa2RoUYIlgtCxkkvJrNoGdR5UTHHB72eh2NT:+v462XlaSFNWPjljiFXRoUYIDkcr

Score

10^/10

quasar filip spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

filip

C2

192.168.1.171:4782

Mutex

8a32f315-b6f7-488d-8f1f-fefeb759304a

Attributes

encryption_key
F0287BA2AFF0852B0C114DD06BE24EB4A3DB1A65
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
SpotifyLauncher
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral3/memory/4744-1-0x00000000007F0000-0x0000000000B14000-memory.dmp	family_quasar
behavioral3/files/0x001b00000002aab2-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2324	Client.exe

Modifies registry class 4 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\MuiCache	MiniSearchHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Content\CachePrefix	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:"	BackgroundTransferHost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3587106988-279496464-3440778474-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoftwindows.client.cbs_cw5n1h2txyewy\Internet Settings\Cache\History\CachePrefix = "Visited:"	BackgroundTransferHost.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
2600	schtasks.exe
1192	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4744	SpotifyLauncher.exe
Token: SeDebugPrivilege	2324	Client.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
2324	Client.exe
5076	MiniSearchHost.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4744 wrote to memory of 1192	4744	SpotifyLauncher.exe	77
PID 4744 wrote to memory of 1192	4744	SpotifyLauncher.exe	77
PID 4744 wrote to memory of 2324	4744	SpotifyLauncher.exe	79
PID 4744 wrote to memory of 2324	4744	SpotifyLauncher.exe	79
PID 2324 wrote to memory of 2600	2324	Client.exe	80
PID 2324 wrote to memory of 2600	2324	Client.exe	80

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\SpotifyLauncher.exe
"C:\Users\Admin\AppData\Local\Temp\SpotifyLauncher.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4744
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "SpotifyLauncher" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1192
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2324
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "SpotifyLauncher" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:2600

C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
1⤵
- Modifies registry class
- Suspicious use of SetWindowsHookEx
PID:5076

C:\Windows\system32\BackgroundTransferHost.exe
"BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.13
1⤵
- Modifies registry class
PID:2368

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:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

Filesize
10KB

MD5
069c37bf9e39b121efb7a28ece933aee

SHA1
eaef2e55b66e543a14a6780c23bb83fe60f2f04d

SHA256
485db8db6b497d31d428aceea416da20d88f7bde88dbfd6d59e3e7eee0a75ae8

SHA512
f4562071143c2ebc259a20cbb45b133c863f127a5750672b7a2af47783c7cdc56dcf1064ae83f54e5fc0bb4e93826bf2ab4ef6e604f955bf594f2cbd641db796

Download Submit
C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

Filesize
10KB

MD5
eed640164203d0d0a2a1e7919a6fdbdf

SHA1
9af74121e090cf2970beee82d22ef4ebb886c0ae

SHA256
4ca7fe712b4322fdb497733e015f4ae4496d3998772a6c37305da3cbba3eb7ae

SHA512
1bf6de193ae00189525ea9a685bbe3dc7722eceb6ccfb83c70adc766b6301b4978abf73b2f8f41b865f1521925308e4f96285dca569e9c2b2c61e79db1100e3d

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

Filesize
3.1MB

MD5
459bd1f40deff63df61baa82b8c053b3

SHA1
e08e35044bf8f73b67e54901ad37a4edf33fc319

SHA256
812c0beafd8928e2aa6410d1889acecf6b4213614d3fadbfc3fbba295932c9c3

SHA512
4232cf3ef7fe0e199a9e673ce785ecdd313ebdd5104d0a016105c7a76d77c350bac623e33d794255b04d989c12436d42850ef95b68452f04f9a7c6109c44130b

Download Submit
memory/2324-9-0x00007FFE85A70000-0x00007FFE86532000-memory.dmp

Filesize
10.8MB

Download
memory/2324-11-0x00007FFE85A70000-0x00007FFE86532000-memory.dmp

Filesize
10.8MB

Download
memory/2324-12-0x000000001B140000-0x000000001B190000-memory.dmp

Filesize
320KB

Download
memory/2324-13-0x000000001BEA0000-0x000000001BF52000-memory.dmp

Filesize
712KB

Download
memory/2324-14-0x00007FFE85A70000-0x00007FFE86532000-memory.dmp

Filesize
10.8MB

Download
memory/4744-0-0x00007FFE85A73000-0x00007FFE85A75000-memory.dmp

Filesize
8KB

Download
memory/4744-1-0x00000000007F0000-0x0000000000B14000-memory.dmp

Filesize
3.1MB

Download
memory/4744-2-0x00007FFE85A70000-0x00007FFE86532000-memory.dmp

Filesize
10.8MB

Download
memory/4744-10-0x00007FFE85A70000-0x00007FFE86532000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads