quasar | 3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31

General

Target

3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe
Size

3.1MB
MD5

fbb44da2d0860af30fc45116529832df
SHA1

44377732b9959172cdb261d366069801adafd52a
SHA256

3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31
SHA512

b1cdda7f3b67f1bedfbf896a4e7e8af0d12aa78a8709604d1262cc68ff0b0bdb3a326e7325075210f4d4e22e43fd7a7fa4bfbc90fc4c032bc3f3304f79157909
SSDEEP

49152:Pvyt62XlaSFNWPjljiFa2RoUYIonF7KoGd1GKuTHHB72eh2NT:Pva62XlaSFNWPjljiFXRoUYIonFW

Score

10^/10

quasar svhost32 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svhost32

C2

87.228.57.81:4782

Mutex

47b71fc0-b2c4-4112-b97a-39385a5399c1

Attributes

encryption_key
19A0FAF8459F69650B5965C225752D425C429EEC
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
svhost32
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/2916-1-0x00000000002A0000-0x00000000005C4000-memory.dmp	family_quasar
behavioral1/files/0x000f000000016d3f-5.dat	family_quasar
behavioral1/memory/2960-10-0x0000000000E90000-0x00000000011B4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
2960	Client.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
2872	schtasks.exe
3008	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2916	3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe
Token: SeDebugPrivilege	2960	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2960	Client.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2916 wrote to memory of 2872	2916	3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe	30
PID 2916 wrote to memory of 2872	2916	3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe	30
PID 2916 wrote to memory of 2872	2916	3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe	30
PID 2916 wrote to memory of 2960	2916	3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe	32
PID 2916 wrote to memory of 2960	2916	3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe	32
PID 2916 wrote to memory of 2960	2916	3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe	32
PID 2960 wrote to memory of 3008	2960	Client.exe	33
PID 2960 wrote to memory of 3008	2960	Client.exe	33
PID 2960 wrote to memory of 3008	2960	Client.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\3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe
"C:\Users\Admin\AppData\Local\Temp\3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2916
- C:\Windows\system32\schtasks.exe
  "schtasks" /create /tn "svhost32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2872
- 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:2960
- - C:\Windows\system32\schtasks.exe
    "schtasks" /create /tn "svhost32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:3008

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
3.1MB

MD5
fbb44da2d0860af30fc45116529832df

SHA1
44377732b9959172cdb261d366069801adafd52a

SHA256
3dc3c88ce100a2f6d16e8c0fbd096b622810bb62dd6dcf5719c657254129ec31

SHA512
b1cdda7f3b67f1bedfbf896a4e7e8af0d12aa78a8709604d1262cc68ff0b0bdb3a326e7325075210f4d4e22e43fd7a7fa4bfbc90fc4c032bc3f3304f79157909

Download Submit
memory/2916-0-0x000007FEF5A73000-0x000007FEF5A74000-memory.dmp

Filesize
4KB

Download
memory/2916-1-0x00000000002A0000-0x00000000005C4000-memory.dmp

Filesize
3.1MB

Download
memory/2916-2-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/2916-8-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/2960-9-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/2960-10-0x0000000000E90000-0x00000000011B4000-memory.dmp

Filesize
3.1MB

Download
memory/2960-11-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download
memory/2960-12-0x000007FEF5A70000-0x000007FEF645C000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads