quasar | c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2

General

Target

c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2.exe
Size

3.1MB
MD5

e3d628461d24faf2ad61e1305ed99542
SHA1

aefcdd93114397de51ce8f63e9ef96b65a5b5c11
SHA256

c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2
SHA512

20d47ef82c1dde83325d088c69ff9ae6f968b0a19d652f5ed2f21b1531c86fbf0b49e9df0d524c1333001c7565a8a56039aa31bb82ceba63c41b989dc8fcc991
SSDEEP

49152:xvSlL26AaNeWgPhlmVqvMQ7XSK0bLimzCCoGdITHHB72eh2NT:xvKL26AaNeWgPhlmVqkQ7XSK0bLz

Score

10^/10

quasar office04 spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

31.177.108.29:4782

Mutex

553dcf2c-4c70-4c0c-935a-2e078a46f03e

Attributes

encryption_key
DAFF70D249B4EC619D5A052FDD3418E3549FF268
install_name
KR6nDu9fLhop1bFe.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Defender.Process
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/3264-1-0x00000000002A0000-0x00000000005C4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe	family_quasar

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

Processes:

resource	yara_rule
behavioral2/memory/3264-1-0x00000000002A0000-0x00000000005C4000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.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/3264-1-0x00000000002A0000-0x00000000005C4000-memory.dmp	INDICATOR_SUSPICIOUS_Binary_References_Browsers
C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe	INDICATOR_SUSPICIOUS_Binary_References_Browsers

Detects executables containing common artifacts observed in infostealers 2 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3264-1-0x00000000002A0000-0x00000000005C4000-memory.dmp	INDICATOR_SUSPICIOUS_GENInfoStealer
C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe	INDICATOR_SUSPICIOUS_GENInfoStealer

Executes dropped EXE 1 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

2328 KR6nDu9fLhop1bFe.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

640 schtasks.exe
2524 schtasks.exe

pid	process
2328	KR6nDu9fLhop1bFe.exe

pid	process
640	schtasks.exe
2524	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2.exeKR6nDu9fLhop1bFe.exe

description	pid	process
Token: SeDebugPrivilege	3264	c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2.exe
Token: SeDebugPrivilege	2328	KR6nDu9fLhop1bFe.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

KR6nDu9fLhop1bFe.exe

pid process

2328 KR6nDu9fLhop1bFe.exe

pid	process
2328	KR6nDu9fLhop1bFe.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2.exeKR6nDu9fLhop1bFe.exe

description	pid	process	target process
PID 3264 wrote to memory of 640	3264	c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2.exe	schtasks.exe
PID 3264 wrote to memory of 640	3264	c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2.exe	schtasks.exe
PID 3264 wrote to memory of 2328	3264	c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2.exe	KR6nDu9fLhop1bFe.exe
PID 3264 wrote to memory of 2328	3264	c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2.exe	KR6nDu9fLhop1bFe.exe
PID 2328 wrote to memory of 2524	2328	KR6nDu9fLhop1bFe.exe	schtasks.exe
PID 2328 wrote to memory of 2524	2328	KR6nDu9fLhop1bFe.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\c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2.exe
"C:\Users\Admin\AppData\Local\Temp\c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3264

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Defender.Process" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:640

C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe
"C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2328

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Defender.Process" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:2524

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:\Users\Admin\AppData\Roaming\SubDir\KR6nDu9fLhop1bFe.exe
Filesize
3.1MB

MD5
e3d628461d24faf2ad61e1305ed99542

SHA1
aefcdd93114397de51ce8f63e9ef96b65a5b5c11

SHA256
c509ea51e44a654f104ab9fb8e5d681a871159c73fcf3f666245e303387329b2

SHA512
20d47ef82c1dde83325d088c69ff9ae6f968b0a19d652f5ed2f21b1531c86fbf0b49e9df0d524c1333001c7565a8a56039aa31bb82ceba63c41b989dc8fcc991

Download Submit
memory/2328-10-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

Filesize
10.8MB

Download
memory/2328-11-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

Filesize
10.8MB

Download
memory/2328-12-0x000000001BEE0000-0x000000001BF30000-memory.dmp

Filesize
320KB

Download
memory/2328-13-0x000000001BFF0000-0x000000001C0A2000-memory.dmp

Filesize
712KB

Download
memory/2328-14-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

Filesize
10.8MB

Download
memory/3264-0-0x00007FF85B423000-0x00007FF85B425000-memory.dmp

Filesize
8KB

Download
memory/3264-1-0x00000000002A0000-0x00000000005C4000-memory.dmp

Filesize
3.1MB

Download
memory/3264-2-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

Filesize
10.8MB

Download
memory/3264-9-0x00007FF85B420000-0x00007FF85BEE1000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads