quasar | e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d

General

Target

e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe
Size

480KB
MD5

8588b18966f364f6676ae1a69f572eb6
SHA1

338b8a9549bd98088d622c44822cd0605bde79b9
SHA256

e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d
SHA512

f70159f3dcfca24267507b5ec156cce4d5a3bc69c656a0d5eec9cd9a15629f8f66a4f096bc86cde7f40c55d5d2e7b3c267a7dfa3ba51a300432ef812ed161dfe
SSDEEP

12288:iww6xvH9M3Ir55+JpWQbe6Ef4D+2u+4gnflehWt:inKP9M4r55+JAQGf4D+2tleAt

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

Processes:

resource	yara_rule
behavioral2/memory/4736-15-0x0000000000550000-0x00000000005AE000-memory.dmp	family_quasar

Drops startup file 1 IoCs

Processes:

e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\system.vbs	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.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.

Processes:

flow	ioc
14	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

Processes:

e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe

description	pid	Process	procid_target
PID 4764 set thread context of 4736	4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe	90

Program crash 1 IoCs

Processes:

WerFault.exe

pid	pid_target	Process	procid_target
1452	4764	WerFault.exe	84

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

Processes:

e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exeRegAsm.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

Processes:

e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe

pid	Process
4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe
4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe
4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe
4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe
4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe
4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe
4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe
4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe

Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe

pid	Process
4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe
4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegAsm.exe

description	pid	Process
Token: SeDebugPrivilege	4736	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RegAsm.exe

pid	Process
4736	RegAsm.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe

description	pid	Process	procid_target
PID 4764 wrote to memory of 4736	4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe	90
PID 4764 wrote to memory of 4736	4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe	90
PID 4764 wrote to memory of 4736	4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe	90
PID 4764 wrote to memory of 4736	4764	e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe	90

C:\Users\Admin\AppData\Local\Temp\e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe
"C:\Users\Admin\AppData\Local\Temp\e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.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:4764
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Users\Admin\AppData\Local\Temp\e7b1c5616fac47ab49a97f2c25d059333517a0de03e14965d990bd5fd0ce5b4d.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:4736
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4764 -s 628
  2⤵
  - Program crash
  PID:1452

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4764 -ip 4764
1⤵
PID:2076

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

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Downloads

memory/4736-15-0x0000000000550000-0x00000000005AE000-memory.dmp

Filesize
376KB

Download
memory/4736-22-0x00000000061E0000-0x00000000061EA000-memory.dmp

Filesize
40KB

Download
memory/4736-20-0x0000000005E50000-0x0000000005E8C000-memory.dmp

Filesize
240KB

Download
memory/4736-19-0x0000000005A10000-0x0000000005A22000-memory.dmp

Filesize
72KB

Download
memory/4736-18-0x0000000004D20000-0x0000000004D86000-memory.dmp

Filesize
408KB

Download
memory/4736-17-0x0000000004C80000-0x0000000004D12000-memory.dmp

Filesize
584KB

Download
memory/4736-16-0x0000000005160000-0x0000000005704000-memory.dmp

Filesize
5.6MB

Download
memory/4764-7-0x00000000014F0000-0x00000000014F1000-memory.dmp

Filesize
4KB

Download
memory/4764-4-0x00000000014F0000-0x00000000014F1000-memory.dmp

Filesize
4KB

Download
memory/4764-3-0x00000000014F0000-0x00000000014F1000-memory.dmp

Filesize
4KB

Download
memory/4764-2-0x00000000014F0000-0x00000000014F1000-memory.dmp

Filesize
4KB

Download
memory/4764-1-0x00000000014F0000-0x00000000014F1000-memory.dmp

Filesize
4KB

Download
memory/4764-12-0x00000000014F0000-0x00000000014F1000-memory.dmp

Filesize
4KB

Download
memory/4764-5-0x00000000014F0000-0x00000000014F1000-memory.dmp

Filesize
4KB

Download
memory/4764-6-0x00000000014F0000-0x00000000014F1000-memory.dmp

Filesize
4KB

Download
memory/4764-0-0x00000000014F0000-0x00000000014F1000-memory.dmp

Filesize
4KB

Download
memory/4764-8-0x00000000014F0000-0x00000000014F1000-memory.dmp

Filesize
4KB

Download
memory/4764-9-0x00000000014F0000-0x00000000014F1000-memory.dmp

Filesize
4KB

Download
memory/4764-10-0x00000000014F0000-0x00000000014F1000-memory.dmp

Filesize
4KB

Download
memory/4764-11-0x00000000014F0000-0x00000000014F1000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads