quasar | 5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6

General

Target

5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe
Size

1.3MB
MD5

289b643e1a46d2b8de76323db780b6cf
SHA1

ef7ff8a8a634319e57043a35a9c3a9aa062f8a93
SHA256

5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6
SHA512

6353d2a666d5b99d9e6e22cbe9fafb4a0640ade812c3c613bde47ceea612eefc5ef835051b88163edad7a8a49b861ee8847f5a663a9b1049b5578293ccb74a04

Score

10^/10

quasar revengerat office spyware suricata trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office

C2

46.249.59.99:111

Mutex

mz2wiNFAWq1HjJ2fUn

Attributes

encryption_key
8DIs0SbdWcImnvHm2I9I
install_name
csrss.exe
log_directory
Logs
reconnect_delay
3000
startup_key
NET framework
subdirectory
SubDir

Signatures

Quasar Payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/964-68-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/964-66-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/964-64-0x000000000044940E-mapping.dmp	family_quasar
behavioral1/memory/964-63-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/964-62-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/964-61-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
RevengeRAT
Remote-access trojan with a wide range of capabilities.
trojan revengerat
suricata: ET MALWARE Common RAT Connectivity Check Observed
suricata: ET MALWARE Common RAT Connectivity Check Observed
suricata
Drops startup file 1 IoCs

Processes:

powershell.exe

description ioc process

File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\5aa1.url powershell.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

1 ip-api.com
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 1796 set thread context of 964 1796 powershell.exe RegAsm.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\5aa1.url	powershell.exe

flow	ioc
1	ip-api.com

description	pid	process	target process
PID 1796 set thread context of 964	1796	powershell.exe	RegAsm.exe

NTFS ADS 1 IoCs

Processes:

5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Local\Temp\winmgmts:{impersonationLevel=impersonate}!\root\default:StdRegProv	5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

1796 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeRegAsm.exe

description pid process

Token: SeDebugPrivilege 1796 powershell.exe
Token: SeDebugPrivilege 964 RegAsm.exe

pid	process
1796	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1796	powershell.exe
Token: SeDebugPrivilege	964	RegAsm.exe

Suspicious use of FindShellTrayWindow 3 IoCs

Processes:

5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe

pid	process
1784	5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe
1784	5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe
1784	5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe

Suspicious use of SendNotifyMessage 3 IoCs

Processes:

5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe

pid	process
1784	5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe
1784	5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe
1784	5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exepowershell.exe

description	pid	process	target process
PID 1784 wrote to memory of 1796	1784	5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe	powershell.exe
PID 1784 wrote to memory of 1796	1784	5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe	powershell.exe
PID 1784 wrote to memory of 1796	1784	5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe	powershell.exe
PID 1784 wrote to memory of 1796	1784	5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe	powershell.exe
PID 1796 wrote to memory of 964	1796	powershell.exe	RegAsm.exe
PID 1796 wrote to memory of 964	1796	powershell.exe	RegAsm.exe
PID 1796 wrote to memory of 964	1796	powershell.exe	RegAsm.exe
PID 1796 wrote to memory of 964	1796	powershell.exe	RegAsm.exe
PID 1796 wrote to memory of 964	1796	powershell.exe	RegAsm.exe
PID 1796 wrote to memory of 964	1796	powershell.exe	RegAsm.exe
PID 1796 wrote to memory of 964	1796	powershell.exe	RegAsm.exe
PID 1796 wrote to memory of 964	1796	powershell.exe	RegAsm.exe
PID 1796 wrote to memory of 964	1796	powershell.exe	RegAsm.exe
PID 1796 wrote to memory of 964	1796	powershell.exe	RegAsm.exe
PID 1796 wrote to memory of 964	1796	powershell.exe	RegAsm.exe
PID 1796 wrote to memory of 964	1796	powershell.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe
"C:\Users\Admin\AppData\Local\Temp\5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe"
1⤵
- NTFS ADS
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1784

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
powershell [System.Threading.Thread]::GetDomain().Load([Microsoft.Win32.Registry]::CurrentUser.OpenSubKey('Software\yVP').GetValue('GJW'));[Rkb]::eEyo('C:\Users\Admin\AppData\Local\Temp\5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe', 'QTEO', '5aa187357d7fd3e33f6f6780809f14f33d2808f8510d0c4ba63952c8574410e6.exe')
2⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1796

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:964

Network

MITRE ATT&CK Matrix

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Downloads

memory/964-59-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/964-68-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/964-66-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/964-64-0x000000000044940E-mapping.dmp

Download
memory/964-63-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/964-62-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/964-61-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/964-58-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1784-54-0x00000000765F1000-0x00000000765F3000-memory.dmp

Filesize
8KB

Download
memory/1796-55-0x0000000000000000-mapping.dmp

Download
memory/1796-57-0x00000000746E0000-0x0000000074C8B000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix

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Downloads