quasar | 53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88

General

Target

53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe
Size

1.7MB
MD5

27973761305381b8a1888fa5fba466c0
SHA1

8c3d7fcec5e2bf468edf04de4640e8b5b0cbb160
SHA256

53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88
SHA512

e38a991050d49668135466af5f885f0623614b13cfd26c20926fa7e164271de9a6ec60e9ac6022e07351f8d42aeb25be914e7de2887eeca24953c8c94f7d68de
SSDEEP

24576:PUxJIRCRoenYQb6VOJ8Kgn1beVuumyEU:

Score

10^/10

quasar cio persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Cio

C2

162.19.131.197:4782

Mutex

c5fdf017-8f44-47ea-a69e-0b82e4044ca7

Attributes

encryption_key
59A92039F951E5069C9F50FD9F340E759713B058
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 payload 6 IoCs

resource	yara_rule
behavioral1/memory/1700-64-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar
behavioral1/memory/1700-65-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar
behavioral1/memory/1700-66-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar
behavioral1/memory/1700-67-0x000000000047E79E-mapping.dmp	family_quasar
behavioral1/memory/1700-69-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar
behavioral1/memory/1700-71-0x0000000000400000-0x0000000000484000-memory.dmp	family_quasar

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\Jlnprgcxco = "\"C:\\Users\\Admin\\AppData\\Roaming\\Eqbuy\\Jlnprgcxco.exe\""	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2012 set thread context of 1700	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe	29

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe
1100	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe
Token: SeDebugPrivilege	1100	powershell.exe
Token: SeDebugPrivilege	1700	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1700	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 2012 wrote to memory of 1100	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe	27
PID 2012 wrote to memory of 1100	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe	27
PID 2012 wrote to memory of 1100	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe	27
PID 2012 wrote to memory of 1100	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe	27
PID 2012 wrote to memory of 1700	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe	29
PID 2012 wrote to memory of 1700	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe	29
PID 2012 wrote to memory of 1700	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe	29
PID 2012 wrote to memory of 1700	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe	29
PID 2012 wrote to memory of 1700	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe	29
PID 2012 wrote to memory of 1700	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe	29
PID 2012 wrote to memory of 1700	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe	29
PID 2012 wrote to memory of 1700	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe	29
PID 2012 wrote to memory of 1700	2012	53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe	29

C:\Users\Admin\AppData\Local\Temp\53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe
"C:\Users\Admin\AppData\Local\Temp\53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2012
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMQA1AA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1100
- C:\Users\Admin\AppData\Local\Temp\53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe
  C:\Users\Admin\AppData\Local\Temp\53b736e0f18bb8d3026c5a0ff66843ed927120ec55e4a099c0b411214e6cbd88.exe
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1700

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1100-60-0x000000006F330000-0x000000006F8DB000-memory.dmp

Filesize
5.7MB

Download
memory/1100-58-0x0000000074B51000-0x0000000074B53000-memory.dmp

Filesize
8KB

Download
memory/1100-59-0x000000006F330000-0x000000006F8DB000-memory.dmp

Filesize
5.7MB

Download
memory/1700-65-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1700-62-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1700-64-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1700-61-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1700-66-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1700-69-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/1700-71-0x0000000000400000-0x0000000000484000-memory.dmp

Filesize
528KB

Download
memory/2012-56-0x0000000004CB0000-0x0000000004D42000-memory.dmp

Filesize
584KB

Download
memory/2012-55-0x0000000004970000-0x0000000004A52000-memory.dmp

Filesize
904KB

Download
memory/2012-54-0x0000000000C40000-0x0000000000E00000-memory.dmp

Filesize
1.8MB

Download

Analysis

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