quasar | 4c7a86733a4ac849eec1b49179f64b81ed852c47be714d91c3b00d64b79e1399

General

Target

4c7a86733a4ac849eec1b49179f64b81ed852c47be714d91c3b00d64b79e1399.exe
Size

514B
MD5

6a0393cce6ff34424ddad27b162b67f0
SHA1

c67c3d31dd2891d9f0cd070cdf957554ecfd3550
SHA256

4c7a86733a4ac849eec1b49179f64b81ed852c47be714d91c3b00d64b79e1399
SHA512

6d3c3819261150d27de6f037b7ffbdb0287bd1bb1ffe8cdd84e2a89503e24bc664489d997dbfe5f883a93229b3305fb14b104a8bdcdbee9f39b06684f5717cbc

Score

10^/10

quasar 2026 discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

2026

C2

win32updatess.DUCKDNS.ORG:2

Mutex

b70adc1c-122d-4b90-9f59-304d0ab81cd5

Attributes

encryption_key
CE02DB1ED3D345B2461CC2276CDEEDF58EF19723
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 1 IoCs

resource	yara_rule
behavioral2/memory/4508-25-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Downloads MZ/PE file

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	4c7a86733a4ac849eec1b49179f64b81ed852c47be714d91c3b00d64b79e1399.exe

Executes dropped EXE 1 IoCs

pid	Process
4420	c.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4420 set thread context of 4508	4420	c.exe	90

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	4c7a86733a4ac849eec1b49179f64b81ed852c47be714d91c3b00d64b79e1399.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4508	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4508	RegAsm.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4932 wrote to memory of 4420	4932	4c7a86733a4ac849eec1b49179f64b81ed852c47be714d91c3b00d64b79e1399.exe	82
PID 4932 wrote to memory of 4420	4932	4c7a86733a4ac849eec1b49179f64b81ed852c47be714d91c3b00d64b79e1399.exe	82
PID 4932 wrote to memory of 4420	4932	4c7a86733a4ac849eec1b49179f64b81ed852c47be714d91c3b00d64b79e1399.exe	82
PID 4420 wrote to memory of 4508	4420	c.exe	90
PID 4420 wrote to memory of 4508	4420	c.exe	90
PID 4420 wrote to memory of 4508	4420	c.exe	90
PID 4420 wrote to memory of 4508	4420	c.exe	90
PID 4420 wrote to memory of 4508	4420	c.exe	90
PID 4420 wrote to memory of 4508	4420	c.exe	90
PID 4420 wrote to memory of 4508	4420	c.exe	90
PID 4420 wrote to memory of 4508	4420	c.exe	90

C:\Users\Admin\AppData\Local\Temp\4c7a86733a4ac849eec1b49179f64b81ed852c47be714d91c3b00d64b79e1399.exe
"C:\Users\Admin\AppData\Local\Temp\4c7a86733a4ac849eec1b49179f64b81ed852c47be714d91c3b00d64b79e1399.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4932
- C:\Users\Admin\AppData\Local\Temp\c.exe
  "C:\Users\Admin\AppData\Local\Temp\c.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4420
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of SetWindowsHookEx
    PID:4508

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\c.exe

Filesize
3.3MB

MD5
85f734c7ff103995e9ffa75bf661ef4f

SHA1
577f8c3cf3c1c78c7f227508d764c6f9c41d4e5c

SHA256
12ec384e29c8c0f15c05583dd84dbe719c454d70cafca9ee3de8dd2fa51f05ee

SHA512
c273bfbd0ffda0625ba8c2b91af6a105cc734ccd544f20f7d43f75328c34585f643bb2c9158d4107ac3404ad3278107200c984a3694359230b55999a9de026ac

Download Submit
memory/4420-22-0x0000000072C20000-0x00000000733D0000-memory.dmp

Filesize
7.7MB

Download
memory/4420-13-0x00000000031C0000-0x00000000031C6000-memory.dmp

Filesize
24KB

Download
memory/4420-24-0x0000000005A60000-0x0000000005A7E000-memory.dmp

Filesize
120KB

Download
memory/4420-23-0x00000000056D0000-0x00000000059F6000-memory.dmp

Filesize
3.1MB

Download
memory/4420-15-0x00000000079E0000-0x0000000007D14000-memory.dmp

Filesize
3.2MB

Download
memory/4420-16-0x00000000082C0000-0x0000000008864000-memory.dmp

Filesize
5.6MB

Download
memory/4420-17-0x0000000007DF0000-0x0000000007E82000-memory.dmp

Filesize
584KB

Download
memory/4420-18-0x0000000007D70000-0x0000000007D76000-memory.dmp

Filesize
24KB

Download
memory/4420-19-0x00000000066C0000-0x00000000066CA000-memory.dmp

Filesize
40KB

Download
memory/4420-20-0x0000000007880000-0x00000000078F6000-memory.dmp

Filesize
472KB

Download
memory/4420-21-0x0000000072C2E000-0x0000000072C2F000-memory.dmp

Filesize
4KB

Download
memory/4420-11-0x0000000072C2E000-0x0000000072C2F000-memory.dmp

Filesize
4KB

Download
memory/4420-27-0x0000000072C20000-0x00000000733D0000-memory.dmp

Filesize
7.7MB

Download
memory/4420-12-0x00000000008B0000-0x0000000000C0A000-memory.dmp

Filesize
3.4MB

Download
memory/4420-14-0x0000000072C20000-0x00000000733D0000-memory.dmp

Filesize
7.7MB

Download
memory/4508-39-0x0000000072C20000-0x00000000733D0000-memory.dmp

Filesize
7.7MB

Download
memory/4508-28-0x0000000072C20000-0x00000000733D0000-memory.dmp

Filesize
7.7MB

Download
memory/4508-29-0x0000000072C20000-0x00000000733D0000-memory.dmp

Filesize
7.7MB

Download
memory/4508-30-0x0000000005DF0000-0x0000000006408000-memory.dmp

Filesize
6.1MB

Download
memory/4508-31-0x0000000005840000-0x0000000005890000-memory.dmp

Filesize
320KB

Download
memory/4508-32-0x0000000005AB0000-0x0000000005B62000-memory.dmp

Filesize
712KB

Download
memory/4508-35-0x0000000006F70000-0x0000000006F82000-memory.dmp

Filesize
72KB

Download
memory/4508-36-0x0000000006FD0000-0x000000000700C000-memory.dmp

Filesize
240KB

Download
memory/4508-37-0x0000000007080000-0x00000000070E6000-memory.dmp

Filesize
408KB

Download
memory/4508-38-0x0000000072C20000-0x00000000733D0000-memory.dmp

Filesize
7.7MB

Download
memory/4508-25-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download

Analysis

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