quasar | 716153d5958b307c96be985da422552195800586967911ec5a69d4aa3e7236e7

General

Target

ren_installer.exe
Size

3.1MB
MD5

6584be6ee6ef26f3636531c0e3f41cee
SHA1

e5291dc84bd32fed5831eafc33473ccdaf09ac16
SHA256

716153d5958b307c96be985da422552195800586967911ec5a69d4aa3e7236e7
SHA512

c2328165200248dd5aa964e8f16872a5dffddc079c958b0b1fef95959030637757af98eb8ebe768aaf96772e5f8592caf57f331b1e94eaa9834ca636c749dab6
SSDEEP

49152:Kvgt62XlaSFNWPjljiFa2RoUYIT9OTj81JdLoGnT07THHB72eh2NT:KvM62XlaSFNWPjljiFXRoUYIyjOl

Score

10^/10

quasar reservices spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

ReServices

C2

185.65.134.175:55498

Mutex

86e242cc-399d-4e30-a743-e89f0418f106

Attributes

encryption_key
B451C26057A2AEFC83990793720D2316EA48C49A
install_name
renservice.exe
log_directory
Logs
reconnect_delay
3000
startup_key
renservice
subdirectory
servicerenk

Signatures

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

Quasar payload 4 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1204-54-0x0000000001180000-0x00000000014A4000-memory.dmp	family_quasar
C:\Windows\System32\servicerenk\renservice.exe	family_quasar
C:\Windows\system32\servicerenk\renservice.exe	family_quasar
behavioral1/memory/752-61-0x0000000000AC0000-0x0000000000DE4000-memory.dmp	family_quasar

Executes dropped EXE 1 IoCs

Processes:

renservice.exe

pid process

752 renservice.exe

pid	process
752	renservice.exe

Drops file in System32 directory 5 IoCs

Processes:

ren_installer.exerenservice.exe

description	ioc	process
File opened for modification	C:\Windows\system32\servicerenk	ren_installer.exe
File opened for modification	C:\Windows\system32\servicerenk\renservice.exe	renservice.exe
File opened for modification	C:\Windows\system32\servicerenk	renservice.exe
File created	C:\Windows\system32\servicerenk\renservice.exe	ren_installer.exe
File opened for modification	C:\Windows\system32\servicerenk\renservice.exe	ren_installer.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
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
T1053

Processes:

schtasks.exeschtasks.exe

pid process

1704 schtasks.exe
468 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

ren_installer.exerenservice.exe

description pid process

Token: SeDebugPrivilege 1204 ren_installer.exe
Token: SeDebugPrivilege 752 renservice.exe
Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

renservice.exe

pid process

752 renservice.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

renservice.exe

pid process

752 renservice.exe

pid	process
1704	schtasks.exe
468	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	1204	ren_installer.exe
Token: SeDebugPrivilege	752	renservice.exe

pid	process
752	renservice.exe

pid	process
752	renservice.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

ren_installer.exerenservice.exe

description	pid	process	target process
PID 1204 wrote to memory of 1704	1204	ren_installer.exe	schtasks.exe
PID 1204 wrote to memory of 1704	1204	ren_installer.exe	schtasks.exe
PID 1204 wrote to memory of 1704	1204	ren_installer.exe	schtasks.exe
PID 1204 wrote to memory of 752	1204	ren_installer.exe	renservice.exe
PID 1204 wrote to memory of 752	1204	ren_installer.exe	renservice.exe
PID 1204 wrote to memory of 752	1204	ren_installer.exe	renservice.exe
PID 752 wrote to memory of 468	752	renservice.exe	schtasks.exe
PID 752 wrote to memory of 468	752	renservice.exe	schtasks.exe
PID 752 wrote to memory of 468	752	renservice.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\ren_installer.exe
"C:\Users\Admin\AppData\Local\Temp\ren_installer.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1204

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "renservice" /sc ONLOGON /tr "C:\Windows\system32\servicerenk\renservice.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:1704

C:\Windows\system32\servicerenk\renservice.exe
"C:\Windows\system32\servicerenk\renservice.exe"
2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:752

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "renservice" /sc ONLOGON /tr "C:\Windows\system32\servicerenk\renservice.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:468

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Windows\System32\servicerenk\renservice.exe
Filesize
3.1MB

MD5
6584be6ee6ef26f3636531c0e3f41cee

SHA1
e5291dc84bd32fed5831eafc33473ccdaf09ac16

SHA256
716153d5958b307c96be985da422552195800586967911ec5a69d4aa3e7236e7

SHA512
c2328165200248dd5aa964e8f16872a5dffddc079c958b0b1fef95959030637757af98eb8ebe768aaf96772e5f8592caf57f331b1e94eaa9834ca636c749dab6

Download Submit
C:\Windows\system32\servicerenk\renservice.exe
Filesize
3.1MB

MD5
6584be6ee6ef26f3636531c0e3f41cee

SHA1
e5291dc84bd32fed5831eafc33473ccdaf09ac16

SHA256
716153d5958b307c96be985da422552195800586967911ec5a69d4aa3e7236e7

SHA512
c2328165200248dd5aa964e8f16872a5dffddc079c958b0b1fef95959030637757af98eb8ebe768aaf96772e5f8592caf57f331b1e94eaa9834ca636c749dab6

Download Submit
memory/752-61-0x0000000000AC0000-0x0000000000DE4000-memory.dmp

Filesize
3.1MB

Download
memory/752-62-0x000000001B3A0000-0x000000001B420000-memory.dmp

Filesize
512KB

Download
memory/752-63-0x000000001B3A0000-0x000000001B420000-memory.dmp

Filesize
512KB

Download
memory/1204-54-0x0000000001180000-0x00000000014A4000-memory.dmp

Filesize
3.1MB

Download
memory/1204-55-0x000000001B430000-0x000000001B4B0000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads