quasar | 45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88

General

Target

45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe
Size

480KB
MD5

ef774f6352f9c0f76b3c82d09292a250
SHA1

840b855dc1f349382505defff4d360adce1afb49
SHA256

45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88
SHA512

48f04bf3fefa12d0245cd1c7ba415f1d82bcb2e42aa2e6abd8865edb5cac7f1ccffbd81c66e5561a77afa0139daefa4d6a6dca2321d17bf9cac6415c5fc942be
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

C2

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 1 IoCs

resource	yara_rule
behavioral2/memory/2392-7-0x0000000000400000-0x000000000045E000-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	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.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
13	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 400 set thread context of 2392	400	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe	82

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	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
400	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe
400	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe
400	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe
400	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe
400	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe
400	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe
400	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe
400	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
400	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2392	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2392	RegAsm.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 400 wrote to memory of 2392	400	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe	82
PID 400 wrote to memory of 2392	400	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe	82
PID 400 wrote to memory of 2392	400	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe	82
PID 400 wrote to memory of 2392	400	45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe	82

C:\Users\Admin\AppData\Local\Temp\45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe
"C:\Users\Admin\AppData\Local\Temp\45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.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:400
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\45ba3d67ab43703e287afb99dbe420c498a5f268d1abc92ab82f91aaeaab0d88N.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/400-0-0x0000000000AE0000-0x0000000000AE1000-memory.dmp

Filesize
4KB

Download
memory/400-3-0x0000000000AE0000-0x0000000000AE1000-memory.dmp

Filesize
4KB

Download
memory/400-2-0x0000000000AE0000-0x0000000000AE1000-memory.dmp

Filesize
4KB

Download
memory/400-1-0x0000000000AE0000-0x0000000000AE1000-memory.dmp

Filesize
4KB

Download
memory/400-4-0x0000000000AE0000-0x0000000000AE1000-memory.dmp

Filesize
4KB

Download
memory/2392-7-0x0000000000400000-0x000000000045E000-memory.dmp

Filesize
376KB

Download
memory/2392-8-0x0000000005B50000-0x00000000060F4000-memory.dmp

Filesize
5.6MB

Download
memory/2392-9-0x0000000005640000-0x00000000056D2000-memory.dmp

Filesize
584KB

Download
memory/2392-10-0x0000000005750000-0x00000000057B6000-memory.dmp

Filesize
408KB

Download
memory/2392-11-0x0000000006400000-0x0000000006412000-memory.dmp

Filesize
72KB

Download
memory/2392-12-0x0000000006840000-0x000000000687C000-memory.dmp

Filesize
240KB

Download
memory/2392-14-0x0000000006BA0000-0x0000000006BAA000-memory.dmp

Filesize
40KB

Download

Analysis

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