quasar | d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4

General

Target

d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe
Size

480KB
MD5

c18ce3e74ddb896c3d53bb186691ae31
SHA1

03aff4a22449756b44c8214e32724f88df91b599
SHA256

d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4
SHA512

88acf31de158deead2dfb884e113acee73a5f913b65d64aba8fc3bf8db9c1d7c78ceaaf039153fc4619db7f1e0ab0323315f6e726f250851d0f16d675763306d
SSDEEP

12288:iww6xvH9M3Ir55+JpWQbe6Ef4D+2u+4gnflehWf:inKP9M4r55+JAQGf4D+2tleAf

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 4 IoCs

resource	yara_rule
behavioral1/memory/2452-12-0x0000000000090000-0x00000000000EE000-memory.dmp	family_quasar
behavioral1/memory/2452-13-0x0000000000090000-0x00000000000EE000-memory.dmp	family_quasar
behavioral1/memory/2452-20-0x0000000000090000-0x00000000000EE000-memory.dmp	family_quasar
behavioral1/memory/2452-17-0x0000000000090000-0x00000000000EE000-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	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.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 2552 set thread context of 2452	2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.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	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe
2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe
2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe
2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe
2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2452	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2452	RegAsm.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 2552 wrote to memory of 2452	2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe	30
PID 2552 wrote to memory of 2452	2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe	30
PID 2552 wrote to memory of 2452	2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe	30
PID 2552 wrote to memory of 2452	2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe	30
PID 2552 wrote to memory of 2452	2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe	30
PID 2552 wrote to memory of 2452	2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe	30
PID 2552 wrote to memory of 2452	2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe	30
PID 2552 wrote to memory of 2452	2552	d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe	30

C:\Users\Admin\AppData\Local\Temp\d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe
"C:\Users\Admin\AppData\Local\Temp\d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.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:2552
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\d7113fad960575b0d0918e9f28e6a01b4b95bbb671c823352dc25b363fb7b8d4.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2452

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/2452-12-0x0000000000090000-0x00000000000EE000-memory.dmp

Filesize
376KB

Download
memory/2452-17-0x0000000000090000-0x00000000000EE000-memory.dmp

Filesize
376KB

Download
memory/2452-20-0x0000000000090000-0x00000000000EE000-memory.dmp

Filesize
376KB

Download
memory/2452-13-0x0000000000090000-0x00000000000EE000-memory.dmp

Filesize
376KB

Download
memory/2552-8-0x0000000000490000-0x0000000000491000-memory.dmp

Filesize
4KB

Download
memory/2552-9-0x0000000000490000-0x0000000000491000-memory.dmp

Filesize
4KB

Download
memory/2552-0-0x0000000000100000-0x0000000000101000-memory.dmp

Filesize
4KB

Download
memory/2552-7-0x0000000000490000-0x0000000000491000-memory.dmp

Filesize
4KB

Download
memory/2552-6-0x0000000000100000-0x0000000000101000-memory.dmp

Filesize
4KB

Download
memory/2552-5-0x0000000000490000-0x0000000000491000-memory.dmp

Filesize
4KB

Download
memory/2552-3-0x0000000000100000-0x0000000000101000-memory.dmp

Filesize
4KB

Download
memory/2552-4-0x0000000000100000-0x0000000000101000-memory.dmp

Filesize
4KB

Download
memory/2552-2-0x0000000000100000-0x0000000000101000-memory.dmp

Filesize
4KB

Download
memory/2552-1-0x0000000000100000-0x0000000000101000-memory.dmp

Filesize
4KB

Download

Analysis

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