quasar | 7b5cb683875a42757083a2e02fb6cc54d1f472569fc3d570992a18ac019f722e

General

Target

2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe
Size

6.0MB
MD5

821bbfc8f0a946efd3d8c9b8aa6d68ee
SHA1

5bf3f157d56a61fb4ebb92a35664aafcceb2b943
SHA256

7b5cb683875a42757083a2e02fb6cc54d1f472569fc3d570992a18ac019f722e
SHA512

c1ab71e6be5d67fa6fcae1b58c1f8528ebbda63cd790640fae6ebc1229b5cb85583abad16839d72e100dd393045a3ec322a81107a25ce38a3da319389915094d
SSDEEP

98304:vBsvwVReAo6kSF8yYZl1gpJhFEo2ylLj0bsk4BAH6+6TEE:vBaanoJ5ZleLhKKbtY6bEE

Score

10^/10

quasar 05kan24 persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

05KAN24

C2

4Mekey.myftp.biz:4782

Mutex

79b4968e-3635-4865-94f2-359cde910023

Attributes

encryption_key
5A1721840C7FCFA52998D9F98F97F4B8137E6734
install_name
Windows Server.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
Windows Update

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3064-1-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3064-3-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar
behavioral1/memory/3064-5-0x0000000000400000-0x0000000000724000-memory.dmp	family_quasar

Detects Windows executables referencing non-Windows User-Agents 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3064-1-0x0000000000400000-0x0000000000724000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/3064-3-0x0000000000400000-0x0000000000724000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral1/memory/3064-5-0x0000000000400000-0x0000000000724000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3064-1-0x0000000000400000-0x0000000000724000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral1/memory/3064-3-0x0000000000400000-0x0000000000724000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
behavioral1/memory/3064-5-0x0000000000400000-0x0000000000724000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables containing common artifacts observed in infostealers 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/3064-1-0x0000000000400000-0x0000000000724000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer
behavioral1/memory/3064-3-0x0000000000400000-0x0000000000724000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer
behavioral1/memory/3064-5-0x0000000000400000-0x0000000000724000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord = "C:\\Users\\Admin\\2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe"	2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe

description pid process target process

PID 1500 set thread context of 3064 1500 2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe jsc.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

jsc.exe

description pid process

Token: SeDebugPrivilege 3064 jsc.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

jsc.exe

pid process

3064 jsc.exe

description	pid	process	target process
PID 1500 set thread context of 3064	1500	2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe	jsc.exe

description	pid	process
Token: SeDebugPrivilege	3064	jsc.exe

pid	process
3064	jsc.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe

description	pid	process	target process
PID 1500 wrote to memory of 3064	1500	2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe	jsc.exe
PID 1500 wrote to memory of 3064	1500	2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe	jsc.exe
PID 1500 wrote to memory of 3064	1500	2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe	jsc.exe
PID 1500 wrote to memory of 3064	1500	2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe	jsc.exe
PID 1500 wrote to memory of 3064	1500	2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe	jsc.exe
PID 1500 wrote to memory of 3064	1500	2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe	jsc.exe
PID 1500 wrote to memory of 3064	1500	2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe	jsc.exe
PID 1500 wrote to memory of 3064	1500	2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe	jsc.exe
PID 1500 wrote to memory of 3064	1500	2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe	jsc.exe

C:\Users\Admin\AppData\Local\Temp\2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_821bbfc8f0a946efd3d8c9b8aa6d68ee_megazord.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1500

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 SetWindowsHookEx
PID:3064

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/3064-1-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3064-3-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3064-5-0x0000000000400000-0x0000000000724000-memory.dmp

Filesize
3.1MB

Download
memory/3064-6-0x000000007440E000-0x000000007440F000-memory.dmp

Filesize
4KB

Download
memory/3064-7-0x0000000074400000-0x0000000074AEE000-memory.dmp

Filesize
6.9MB

Download
memory/3064-8-0x000000007440E000-0x000000007440F000-memory.dmp

Filesize
4KB

Download
memory/3064-9-0x0000000074400000-0x0000000074AEE000-memory.dmp

Filesize
6.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads