quasar | 63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950

Resubmissions

04-01-2025 14:13

250104-rjfxvssphx 10

04-01-2025 13:54

250104-q7y8nsvkaj 10

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
04-01-2025 13:54

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General

Target

63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe
Size

480KB
MD5

1eb69f7c6c85d25643396c52745fb8f0
SHA1

80266ec69123767990f1e58372ee9b47c12e01cc
SHA256

63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950
SHA512

6f45abc90571e3efae25dce66cb86d69aea53d3631662dbc0317905ca6f9740de3eb112196b9c83544907e944057a0eab5698fd0834df277f755536b74ec215f
SSDEEP

12288:iww6xvH9M3Ir55+JpWQbe6Ef4D+2u+4gnflehW:inKP9M4r55+JAQGf4D+2tleA

Score

10^/10

quasar svchost.exe discovery spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

svchost.exe

23.227.174.82:4782

Mutex

QSR_MUTEX_UtaUPinApnyZsQXsVE

Attributes

encryption_key
hn8U0t79xWv7f03kzG79
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 3 IoCs

resource	yara_rule
behavioral1/memory/2912-15-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/2912-14-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar
behavioral1/memory/2912-13-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\system.vbs	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
2	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2660 set thread context of 2912	2660	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe	30

System Location Discovery: System Language Discovery 1 TTPs 2 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	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2660	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe
2660	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe
2660	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe
2660	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2660	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2912	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2912	RegAsm.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2660 wrote to memory of 2912	2660	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe	30
PID 2660 wrote to memory of 2912	2660	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe	30
PID 2660 wrote to memory of 2912	2660	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe	30
PID 2660 wrote to memory of 2912	2660	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe	30
PID 2660 wrote to memory of 2912	2660	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe	30
PID 2660 wrote to memory of 2912	2660	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe	30
PID 2660 wrote to memory of 2912	2660	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe	30
PID 2660 wrote to memory of 2912	2660	63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe	30

C:\Users\Admin\AppData\Local\Temp\63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe
"C:\Users\Admin\AppData\Local\Temp\63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2660
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\63c6d0920ea03f76908fe5f7b2492445de2ae9a2324fe4bb8e8300b869e92950N.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2912

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2660-0-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/2660-3-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/2660-7-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/2660-6-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/2660-5-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/2660-4-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/2660-2-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/2660-1-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/2660-10-0x00000000004C0000-0x00000000004C1000-memory.dmp

Filesize
4KB

Download
memory/2660-9-0x00000000000D0000-0x00000000000D1000-memory.dmp

Filesize
4KB

Download
memory/2660-8-0x00000000004C0000-0x00000000004C1000-memory.dmp

Filesize
4KB

Download
memory/2912-15-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2912-14-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2912-13-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download