quasar | b3573e1e395f30ce38648d8c9d5714ad35b0bcb93dbeabb1954e14b0199ca4d7

Analysis

max time kernel
150s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20231222-en
resource tags

arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
submitted
14/02/2024, 15:59

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General

Target

Microsoft Gaming Helper.exe
Size

3.1MB
MD5

1f4df8c89189221420cd89ea0bdcf753
SHA1

30d7c89bd5d28870a5f6c25749ef2bb7b797de72
SHA256

b3573e1e395f30ce38648d8c9d5714ad35b0bcb93dbeabb1954e14b0199ca4d7
SHA512

4c7a66f7b5dff06328f6e737994e29dbec32931d9974c560d0867f67aef3a0c4f3a475f68d5299039bcde8528312611af18a654be34e6378a37d24e659be8ee1
SSDEEP

49152:3vbI22SsaNYfdPBldt698dBcjHwJRJ6/bR3LoGdJQ1THHB72eh2NT:3vk22SsaNYfdPBldt6+dBcjHwJRJ6RW

Score

10^/10

quasar enayi spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Enayi

192.168.0.7:4782

Mutex

cfb088c2-8243-4e30-af47-82a5b5bebf06

Attributes

encryption_key
7AD862AAD94BE9C6EAA16CA4328915D7905AA3B4
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/4000-0-0x0000000000B10000-0x0000000000E34000-memory.dmp	family_quasar
behavioral2/files/0x00070000000231e6-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4680	Client.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
1768	schtasks.exe
4936	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4000	Microsoft Gaming Helper.exe
Token: SeDebugPrivilege	4680	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4000 wrote to memory of 1768	4000	Microsoft Gaming Helper.exe	85
PID 4000 wrote to memory of 1768	4000	Microsoft Gaming Helper.exe	85
PID 4000 wrote to memory of 4680	4000	Microsoft Gaming Helper.exe	86
PID 4000 wrote to memory of 4680	4000	Microsoft Gaming Helper.exe	86
PID 4680 wrote to memory of 4936	4680	Client.exe	87
PID 4680 wrote to memory of 4936	4680	Client.exe	87

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\Microsoft Gaming Helper.exe
"C:\Users\Admin\AppData\Local\Temp\Microsoft Gaming Helper.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4000
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1768
- 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 WriteProcessMemory
  PID:4680
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4936

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
3.1MB

MD5
1f4df8c89189221420cd89ea0bdcf753

SHA1
30d7c89bd5d28870a5f6c25749ef2bb7b797de72

SHA256
b3573e1e395f30ce38648d8c9d5714ad35b0bcb93dbeabb1954e14b0199ca4d7

SHA512
4c7a66f7b5dff06328f6e737994e29dbec32931d9974c560d0867f67aef3a0c4f3a475f68d5299039bcde8528312611af18a654be34e6378a37d24e659be8ee1

Download Submit
memory/4000-0-0x0000000000B10000-0x0000000000E34000-memory.dmp

Filesize
3.1MB

Download
memory/4000-1-0x00007FFA56190000-0x00007FFA56C51000-memory.dmp

Filesize
10.8MB

Download
memory/4000-2-0x000000001BA80000-0x000000001BA90000-memory.dmp

Filesize
64KB

Download
memory/4000-10-0x00007FFA56190000-0x00007FFA56C51000-memory.dmp

Filesize
10.8MB

Download
memory/4680-9-0x00007FFA56190000-0x00007FFA56C51000-memory.dmp

Filesize
10.8MB

Download
memory/4680-11-0x000000001BCA0000-0x000000001BCB0000-memory.dmp

Filesize
64KB

Download
memory/4680-12-0x0000000003180000-0x00000000031D0000-memory.dmp

Filesize
320KB

Download
memory/4680-13-0x000000001C3C0000-0x000000001C472000-memory.dmp

Filesize
712KB

Download
memory/4680-14-0x00007FFA56190000-0x00007FFA56C51000-memory.dmp

Filesize
10.8MB

Download

Analysis

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General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads