quasar | 2447438e200ce5fbb043278cd27960bb7ad9c8aa2767fc9331b5150d0b184b99

Reason

Machine shutdown

General

Target
2024-05-25_74ac1825148109702a52be3db0aefa02_megazord.exe
Size 3.9MB
Sample240525-kdkwasbg99
SHA256 2447438e200ce5fbb043278cd27960bb7ad9c8aa2767fc9331b5150d0b184b99
MD5 74ac1825148109702a52be3db0aefa02
SHA1 3c225c5ac67009f0192e0de457c8ea8b69a68462
SHA512 b25d6bf9c14a5fa23686ea73df1af4a17a4e8af44cb1beb7490431473f26eb8ec52ebcb47304ef2a44989bd21bb10cfd98cecdb53acc4db306aeee1094a18071
SSDEEP 49152:DVNUO/YueL2PYCDbLftqxo1XEC2gFuVoPBsE1/HENJ9WvU:62OMLBryJB
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar software spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

software

C2

qassar23.ddns.net:1993

Mutex

QSR_MUTEX_8qLPsMuUILG0w5xt01

Attributes

encryption_key
FfICOWgR7IOmFn9viaox
install_name
Update service.exe
log_directory
Logs
reconnect_delay
3000
startup_key
software
subdirectory
microsofte

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 1 IoCs

resource	yara_rule
behavioral2/memory/4064-0-0x0000000000400000-0x000000000045E000-memory.dmp	family_quasar

Detects Windows executables referencing non-Windows User-Agents 1 IoCs

resource	yara_rule
behavioral2/memory/4064-0-0x0000000000400000-0x000000000045E000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects executables containing common artifacts observed in infostealers 1 IoCs

resource	yara_rule
behavioral2/memory/4064-0-0x0000000000400000-0x000000000045E000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer

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
11	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2596 set thread context of 4064	2596	2024-05-25_74ac1825148109702a52be3db0aefa02_megazord.exe	83

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
1596	schtasks.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "12"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4064	jsc.exe
Token: SeShutdownPrivilege	4440	shutdown.exe
Token: SeRemoteShutdownPrivilege	4440	shutdown.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2016	LogonUI.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2596 wrote to memory of 4064	2596	2024-05-25_74ac1825148109702a52be3db0aefa02_megazord.exe	83
PID 2596 wrote to memory of 4064	2596	2024-05-25_74ac1825148109702a52be3db0aefa02_megazord.exe	83
PID 2596 wrote to memory of 4064	2596	2024-05-25_74ac1825148109702a52be3db0aefa02_megazord.exe	83
PID 2596 wrote to memory of 4064	2596	2024-05-25_74ac1825148109702a52be3db0aefa02_megazord.exe	83
PID 2596 wrote to memory of 4064	2596	2024-05-25_74ac1825148109702a52be3db0aefa02_megazord.exe	83
PID 2596 wrote to memory of 4064	2596	2024-05-25_74ac1825148109702a52be3db0aefa02_megazord.exe	83
PID 2596 wrote to memory of 4064	2596	2024-05-25_74ac1825148109702a52be3db0aefa02_megazord.exe	83
PID 2596 wrote to memory of 4064	2596	2024-05-25_74ac1825148109702a52be3db0aefa02_megazord.exe	83
PID 4064 wrote to memory of 1596	4064	jsc.exe	88
PID 4064 wrote to memory of 1596	4064	jsc.exe	88
PID 4064 wrote to memory of 1596	4064	jsc.exe	88
PID 4064 wrote to memory of 4440	4064	jsc.exe	101
PID 4064 wrote to memory of 4440	4064	jsc.exe	101
PID 4064 wrote to memory of 4440	4064	jsc.exe	101

C:\Users\Admin\AppData\Local\Temp\2024-05-25_74ac1825148109702a52be3db0aefa02_megazord.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-25_74ac1825148109702a52be3db0aefa02_megazord.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2596
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4064
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "software" /sc ONLOGON /tr "C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1596
- - C:\Windows\SysWOW64\shutdown.exe
    "C:\Windows\System32\shutdown.exe" /s /t 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4440

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa3967055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:2016

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/4064-0-0x0000000000400000-0x000000000045E000-memory.dmp

Download

memory/4064-1-0x000000007452E000-0x000000007452F000-memory.dmp

Download

memory/4064-2-0x0000000005B40000-0x00000000060E4000-memory.dmp

Download

memory/4064-3-0x00000000056C0000-0x0000000005752000-memory.dmp

Download

memory/4064-4-0x0000000074520000-0x0000000074CD0000-memory.dmp

Download

memory/4064-5-0x0000000005620000-0x0000000005686000-memory.dmp

Download

memory/4064-6-0x0000000006570000-0x0000000006582000-memory.dmp

Download

memory/4064-7-0x0000000006AF0000-0x0000000006B2C000-memory.dmp

Download

memory/4064-8-0x0000000007260000-0x000000000726A000-memory.dmp

Download

memory/4064-9-0x000000007452E000-0x000000007452F000-memory.dmp

Download

memory/4064-10-0x0000000074520000-0x0000000074CD0000-memory.dmp

Download

memory/4064-11-0x0000000074520000-0x0000000074CD0000-memory.dmp

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads