quasar | 55dd41e0614ba9b4406c926cc1fd970351d14d11552f3a85d522af46b0a49e46

Analysis

max time kernel
148s
max time network
154s
platform
windows7_x64
resource
win7-20240215-en
resource tags

arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system
submitted
15-05-2024 21:56

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General

Target

SynapseX.revamaped.V1.2.rar
Size

160.0MB
MD5

cd5ec11c593656d4106791c71663b56a
SHA1

bd9987f8d1c6f44a35e37cb9fcc14d0bd8d430e6
SHA256

55dd41e0614ba9b4406c926cc1fd970351d14d11552f3a85d522af46b0a49e46
SHA512

63efb6ed75253c0b016649da1964225ce55c85a7051ff898556b09483ef1e2a6f63f721797b8a92595b4830a1fe34f02236a9f59680014181a6a7c09eaa41d9a
SSDEEP

3145728:SXqMQ+crhy8Vm/7kNm6kUhA9DxSs8FpSHNnIBnPmKuLT8gf/c2W:SXtQ+cD0/7DUh8LIBnPgX8B2W

Score

10^/10

quasar windows update spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Windows Update

skbidiooiilet-31205.portmap.host:31205

Mutex

7357b58d-e5d4-42be-8b74-db6eee6cde6d

Attributes

encryption_key
6F721445F7E0B1CF58980D84A9D49F4458D4EFD9
install_name
Update.exe
log_directory
Logs
reconnect_delay
3000
startup_key
WindowsUpdate
subdirectory
Windows Update

Signatures

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

Quasar payload 4 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\7zOC9A2DD57\Synapse X Launcher.exe	family_quasar
behavioral1/memory/2844-36-0x0000000000C30000-0x0000000000F54000-memory.dmp	family_quasar
behavioral1/memory/2516-42-0x00000000009D0000-0x0000000000CF4000-memory.dmp	family_quasar
behavioral1/memory/2692-54-0x0000000001250000-0x0000000001574000-memory.dmp	family_quasar

Executes dropped EXE 3 IoCs

Processes:

Synapse X Launcher.exeUpdate.exeSynapse X Launcher.exe

pid process

2844 Synapse X Launcher.exe
2516 Update.exe
2692 Synapse X Launcher.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/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

3016 schtasks.exe
2036 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

7zFM.exe

pid process

2716 7zFM.exe
2716 7zFM.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

7zFM.exe

pid process

2716 7zFM.exe

pid	process
2844	Synapse X Launcher.exe
2516	Update.exe
2692	Synapse X Launcher.exe

pid	process
3016	schtasks.exe
2036	schtasks.exe

pid	process
2716	7zFM.exe
2716	7zFM.exe

pid	process
2716	7zFM.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

7zFM.exeSynapse X Launcher.exeUpdate.exeSynapse X Launcher.exe

description	pid	process
Token: SeRestorePrivilege	2716	7zFM.exe
Token: 35	2716	7zFM.exe
Token: SeSecurityPrivilege	2716	7zFM.exe
Token: SeDebugPrivilege	2844	Synapse X Launcher.exe
Token: SeDebugPrivilege	2516	Update.exe
Token: SeSecurityPrivilege	2716	7zFM.exe
Token: SeSecurityPrivilege	2716	7zFM.exe
Token: SeDebugPrivilege	2692	Synapse X Launcher.exe

Suspicious use of FindShellTrayWindow 4 IoCs

Processes:

7zFM.exe

pid process

2716 7zFM.exe
2716 7zFM.exe
2716 7zFM.exe
2716 7zFM.exe

pid	process
2716	7zFM.exe
2716	7zFM.exe
2716	7zFM.exe
2716	7zFM.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

cmd.exe7zFM.exeSynapse X Launcher.exeUpdate.exe

description	pid	process	target process
PID 2388 wrote to memory of 2716	2388	cmd.exe	7zFM.exe
PID 2388 wrote to memory of 2716	2388	cmd.exe	7zFM.exe
PID 2388 wrote to memory of 2716	2388	cmd.exe	7zFM.exe
PID 2716 wrote to memory of 2844	2716	7zFM.exe	Synapse X Launcher.exe
PID 2716 wrote to memory of 2844	2716	7zFM.exe	Synapse X Launcher.exe
PID 2716 wrote to memory of 2844	2716	7zFM.exe	Synapse X Launcher.exe
PID 2844 wrote to memory of 3016	2844	Synapse X Launcher.exe	schtasks.exe
PID 2844 wrote to memory of 3016	2844	Synapse X Launcher.exe	schtasks.exe
PID 2844 wrote to memory of 3016	2844	Synapse X Launcher.exe	schtasks.exe
PID 2844 wrote to memory of 2516	2844	Synapse X Launcher.exe	Update.exe
PID 2844 wrote to memory of 2516	2844	Synapse X Launcher.exe	Update.exe
PID 2844 wrote to memory of 2516	2844	Synapse X Launcher.exe	Update.exe
PID 2516 wrote to memory of 2036	2516	Update.exe	schtasks.exe
PID 2516 wrote to memory of 2036	2516	Update.exe	schtasks.exe
PID 2516 wrote to memory of 2036	2516	Update.exe	schtasks.exe
PID 2716 wrote to memory of 2692	2716	7zFM.exe	Synapse X Launcher.exe
PID 2716 wrote to memory of 2692	2716	7zFM.exe	Synapse X Launcher.exe
PID 2716 wrote to memory of 2692	2716	7zFM.exe	Synapse X Launcher.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:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\SynapseX.revamaped.V1.2.rar
1⤵
- Suspicious use of WriteProcessMemory
PID:2388

C:\Program Files\7-Zip\7zFM.exe
"C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\SynapseX.revamaped.V1.2.rar"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of WriteProcessMemory
PID:2716

C:\Users\Admin\AppData\Local\Temp\7zOC9A2DD57\Synapse X Launcher.exe
"C:\Users\Admin\AppData\Local\Temp\7zOC9A2DD57\Synapse X Launcher.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2844

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe" /rl HIGHEST /f
4⤵
- Creates scheduled task(s)
PID:3016

C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe
"C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe"
4⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2516

C:\Windows\system32\schtasks.exe
"schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe" /rl HIGHEST /f
5⤵
- Creates scheduled task(s)
PID:2036

C:\Users\Admin\AppData\Local\Temp\7zOC9ACDDF7\Synapse X Launcher.exe
"C:\Users\Admin\AppData\Local\Temp\7zOC9ACDDF7\Synapse X Launcher.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\7zOC9A2DD57\Synapse X Launcher.exe

Filesize
3.1MB

MD5
1a1fda92143e414b4d4153ab05dd1ce8

SHA1
33ac2b2d228a1ec93b0ea70ffadb436933b9a1e5

SHA256
f0160a1f7a39862e14063ac468957559656405f51d97ad56dc7cff9ad34da9f1

SHA512
70a9a6948f98f3bdc2c7b461634098347bdf683dec36fa92bd1ac652f72daf7fa01f842cbb8331f26c9c5f76907604f75f7c45b746bcfe8f395b3864f998f391

Download Submit
memory/2516-42-0x00000000009D0000-0x0000000000CF4000-memory.dmp

Filesize
3.1MB

Download
memory/2692-54-0x0000000001250000-0x0000000001574000-memory.dmp

Filesize
3.1MB

Download
memory/2844-36-0x0000000000C30000-0x0000000000F54000-memory.dmp

Filesize
3.1MB

Download