quasar | 4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e

Analysis

max time kernel
125s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14-12-2024 03:39

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe
Size

3.4MB
MD5

b67f56e12c03b65821eb83a0d64cc7f1
SHA1

7f482ecb55a7193dc5e0003a5dd4b0e7748d6dca
SHA256

4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e
SHA512

d64f6ac83237b92869e26b3db2131b64814a3acc2106790cc0b89e769336dac4f40ae4576a93d6f6abe727eed5f5b997d6e04eec8618f8cc5155662286854118
SSDEEP

49152:zvyI22SsaNYfdPBldt698dBcjHYXLBmzA/oGd0giTHHB72eh2NTm:zvf22SsaNYfdPBldt6+dBcjHYXL9E3

Score

10^/10

quasar iwantusamo spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Iwantusamo

98.51.190.130:20

Mutex

de054988-dbed-49f6-834a-dda51ccd494b

Attributes

encryption_key
28DB6A992E078CF6FE82A1042CC979D37C6466CE
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 family
quasar

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/2100-1-0x0000000000950000-0x0000000000CB6000-memory.dmp	family_quasar
behavioral2/files/0x0007000000023c8b-6.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
3508	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
4580	schtasks.exe
1028	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2100	4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe
Token: SeDebugPrivilege	3508	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3508	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2100 wrote to memory of 4580	2100	4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe	83
PID 2100 wrote to memory of 4580	2100	4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe	83
PID 2100 wrote to memory of 3508	2100	4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe	85
PID 2100 wrote to memory of 3508	2100	4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe	85
PID 3508 wrote to memory of 1028	3508	Client.exe	86
PID 3508 wrote to memory of 1028	3508	Client.exe	86

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\4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe
"C:\Users\Admin\AppData\Local\Temp\4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2100
- 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⤵
  - Scheduled Task/Job: Scheduled Task
  PID:4580
- 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:3508
- - 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⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1028

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
3.4MB

MD5
b67f56e12c03b65821eb83a0d64cc7f1

SHA1
7f482ecb55a7193dc5e0003a5dd4b0e7748d6dca

SHA256
4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e

SHA512
d64f6ac83237b92869e26b3db2131b64814a3acc2106790cc0b89e769336dac4f40ae4576a93d6f6abe727eed5f5b997d6e04eec8618f8cc5155662286854118

Download Submit
memory/2100-0-0x00007FFF61233000-0x00007FFF61235000-memory.dmp

Filesize
8KB

Download
memory/2100-1-0x0000000000950000-0x0000000000CB6000-memory.dmp

Filesize
3.4MB

Download
memory/2100-2-0x00007FFF61230000-0x00007FFF61CF1000-memory.dmp

Filesize
10.8MB

Download
memory/2100-9-0x00007FFF61230000-0x00007FFF61CF1000-memory.dmp

Filesize
10.8MB

Download
memory/3508-10-0x00007FFF61230000-0x00007FFF61CF1000-memory.dmp

Filesize
10.8MB

Download
memory/3508-11-0x00007FFF61230000-0x00007FFF61CF1000-memory.dmp

Filesize
10.8MB

Download
memory/3508-12-0x000000001B810000-0x000000001B860000-memory.dmp

Filesize
320KB

Download
memory/3508-13-0x000000001C080000-0x000000001C132000-memory.dmp

Filesize
712KB

Download
memory/3508-14-0x00007FFF61230000-0x00007FFF61CF1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads