quasar | 0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79

General

Target

0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79.exe
Size

3.3MB
MD5

88daabfadfec7379a7b25ff1602dd7bd
SHA1

65c3f35d7150df340ca797a2662437933178c9b5
SHA256

0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79
SHA512

7a205e62c3608fcad774dea6384ae7da904a2ba090b9b6f30454bd23eab9f54a1dbaffd72c3534c554c468a5efaa90d75f659e74fdba3ee8581cbb9356c68aa2
SSDEEP

49152:7vBt62XlaSFNWPjljiFa2RoUYI1bxNESEgk/iSLoGdDTHHB72eh2NT:7vr62XlaSFNWPjljiFXRoUYIJxbc

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.12.185:4782

Mutex

15144cdb-7c06-478d-9be3-8228cfe2eee6

Attributes

encryption_key
5FCAB94261E1E836E0ECC532E93B636646535E65
install_name
Conhost.exe
log_directory
Scex
reconnect_delay
3000
startup_key
Google Chrome
subdirectory
SubDir

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/640-0-0x0000000000E20000-0x0000000001168000-memory.dmp	family_quasar
C:\Windows\System32\SubDir\Conhost.exe	family_quasar

Detects Windows executables referencing non-Windows User-Agents 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/640-0-0x0000000000E20000-0x0000000001168000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
C:\Windows\System32\SubDir\Conhost.exe	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/640-0-0x0000000000E20000-0x0000000001168000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
C:\Windows\System32\SubDir\Conhost.exe	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables containing common artifacts observed in infostealers 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/640-0-0x0000000000E20000-0x0000000001168000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer
C:\Windows\System32\SubDir\Conhost.exe	INDICATOR_SUSPICIOUS_GENInfoStealer

Executes dropped EXE 1 IoCs

Processes:

Conhost.exe

pid process

3676 Conhost.exe

pid	process
3676	Conhost.exe

Drops file in System32 directory 5 IoCs

Processes:

0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79.exeConhost.exe

description	ioc	process
File opened for modification	C:\Windows\system32\SubDir\Conhost.exe	0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79.exe
File opened for modification	C:\Windows\system32\SubDir	0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79.exe
File opened for modification	C:\Windows\system32\SubDir\Conhost.exe	Conhost.exe
File opened for modification	C:\Windows\system32\SubDir	Conhost.exe
File created	C:\Windows\system32\SubDir\Conhost.exe	0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79.exe

Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

3756 schtasks.exe
744 schtasks.exe

pid	process
3756	schtasks.exe
744	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79.exeConhost.exe

description	pid	process
Token: SeDebugPrivilege	640	0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79.exe
Token: SeDebugPrivilege	3676	Conhost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Conhost.exe

pid process

3676 Conhost.exe

pid	process
3676	Conhost.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79.exeConhost.exe

description	pid	process	target process
PID 640 wrote to memory of 744	640	0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79.exe	schtasks.exe
PID 640 wrote to memory of 744	640	0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79.exe	schtasks.exe
PID 640 wrote to memory of 3676	640	0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79.exe	Conhost.exe
PID 640 wrote to memory of 3676	640	0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79.exe	Conhost.exe
PID 3676 wrote to memory of 3756	3676	Conhost.exe	schtasks.exe
PID 3676 wrote to memory of 3756	3676	Conhost.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79.exe
"C:\Users\Admin\AppData\Local\Temp\0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:640

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Google Chrome" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Conhost.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:744

C:\Windows\system32\SubDir\Conhost.exe
"C:\Windows\system32\SubDir\Conhost.exe"
2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3676

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Google Chrome" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Conhost.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:3756

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

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Downloads

C:\Windows\System32\SubDir\Conhost.exe
Filesize
3.3MB

MD5
88daabfadfec7379a7b25ff1602dd7bd

SHA1
65c3f35d7150df340ca797a2662437933178c9b5

SHA256
0268b6f80286ff64286d42529c76f9e744932ca5a650b7e9ef2c3c0afc01af79

SHA512
7a205e62c3608fcad774dea6384ae7da904a2ba090b9b6f30454bd23eab9f54a1dbaffd72c3534c554c468a5efaa90d75f659e74fdba3ee8581cbb9356c68aa2

Download Submit
memory/640-0-0x0000000000E20000-0x0000000001168000-memory.dmp

Filesize
3.3MB

Download
memory/640-1-0x00007FFFCCBD0000-0x00007FFFCD691000-memory.dmp

Filesize
10.8MB

Download
memory/640-2-0x000000001C140000-0x000000001C150000-memory.dmp

Filesize
64KB

Download
memory/640-9-0x00007FFFCCBD0000-0x00007FFFCD691000-memory.dmp

Filesize
10.8MB

Download
memory/3676-10-0x00007FFFCCBD0000-0x00007FFFCD691000-memory.dmp

Filesize
10.8MB

Download
memory/3676-11-0x000000001BAC0000-0x000000001BAD0000-memory.dmp

Filesize
64KB

Download
memory/3676-12-0x000000001C6B0000-0x000000001C700000-memory.dmp

Filesize
320KB

Download
memory/3676-13-0x000000001C7C0000-0x000000001C872000-memory.dmp

Filesize
712KB

Download
memory/3676-14-0x00007FFFCCBD0000-0x00007FFFCD691000-memory.dmp

Filesize
10.8MB

Download
memory/3676-15-0x000000001BAC0000-0x000000001BAD0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads