quasar | 4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e

Analysis

max time kernel
136s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
13-12-2024 09:57

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General

Target

1434orz.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/4892-1-0x0000000000860000-0x0000000000BC6000-memory.dmp	family_quasar
behavioral2/files/0x000a000000023b73-5.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
4052	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
4496	schtasks.exe
3092	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4892	1434orz.exe
Token: SeDebugPrivilege	4052	Client.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4052	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4892 wrote to memory of 4496	4892	1434orz.exe	82
PID 4892 wrote to memory of 4496	4892	1434orz.exe	82
PID 4892 wrote to memory of 4052	4892	1434orz.exe	84
PID 4892 wrote to memory of 4052	4892	1434orz.exe	84
PID 4052 wrote to memory of 3092	4052	Client.exe	85
PID 4052 wrote to memory of 3092	4052	Client.exe	85

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\1434orz.exe
"C:\Users\Admin\AppData\Local\Temp\1434orz.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4892
- 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:4496
- 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:4052
- - 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:3092

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

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Downloads

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

Filesize
3.4MB

MD5
b67f56e12c03b65821eb83a0d64cc7f1

SHA1
7f482ecb55a7193dc5e0003a5dd4b0e7748d6dca

SHA256
4fc8b57c9d43bcbe84f7af983e69bc6acac7ba75c3dc85071f622ea0e827739e

SHA512
d64f6ac83237b92869e26b3db2131b64814a3acc2106790cc0b89e769336dac4f40ae4576a93d6f6abe727eed5f5b997d6e04eec8618f8cc5155662286854118

Download Submit
memory/4052-10-0x00007FFDBF310000-0x00007FFDBFDD1000-memory.dmp

Filesize
10.8MB

Download
memory/4052-11-0x00007FFDBF310000-0x00007FFDBFDD1000-memory.dmp

Filesize
10.8MB

Download
memory/4052-12-0x000000001B590000-0x000000001B5E0000-memory.dmp

Filesize
320KB

Download
memory/4052-13-0x000000001D550000-0x000000001D602000-memory.dmp

Filesize
712KB

Download
memory/4052-14-0x00007FFDBF310000-0x00007FFDBFDD1000-memory.dmp

Filesize
10.8MB

Download
memory/4892-0-0x00007FFDBF313000-0x00007FFDBF315000-memory.dmp

Filesize
8KB

Download
memory/4892-1-0x0000000000860000-0x0000000000BC6000-memory.dmp

Filesize
3.4MB

Download
memory/4892-2-0x00007FFDBF310000-0x00007FFDBFDD1000-memory.dmp

Filesize
10.8MB

Download
memory/4892-9-0x00007FFDBF310000-0x00007FFDBFDD1000-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