quasar | d580d7cf10f4eb1cd8aa0cbf80c30f832a0f052c33cdc3d1cf3710e6b67528a8

Analysis

max time kernel
143s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
04-08-2023 15:59

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General

Target

Remote Administration Tool.exe
Size

3.1MB
MD5

73dcb3b3b59192b45f1975fc7a8e9d08
SHA1

5fdaa30f92acc816c3b43db076f98c91391a3588
SHA256

d580d7cf10f4eb1cd8aa0cbf80c30f832a0f052c33cdc3d1cf3710e6b67528a8
SHA512

adce937291bf7c34e255d4b9785884552828cc07fc00b78842402e72e5addb31f61265c2aec593f5bdc1f041bdafd93758bfbc102c8ab25e4bbc7819c16aacc7
SSDEEP

49152:zv2I22SsaNYfdPBldt698dBcjHPby3EfsAk/WPPoGdfTHHB72eh2NT:zvb22SsaNYfdPBldt6+dBcjHPby2H

Score

10^/10

quasar infected spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Infected

AmirAmir8565-20409.portmap.host:20409

Mutex

ff410ede-beff-4970-8e12-7d251057f1fd

Attributes

encryption_key
1B172706DED462B59F2A5056AB06A8DD1EE8491B
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Realtek Audio
subdirectory
SubDir

Signatures

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

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2812-133-0x0000000000500000-0x0000000000824000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe	family_quasar

Executes dropped EXE 1 IoCs

Processes:

Client.exe

pid process

1840 Client.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

4540 schtasks.exe
4952 schtasks.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

Remote Administration Tool.exeClient.exe

description pid process

Token: SeDebugPrivilege 2812 Remote Administration Tool.exe
Token: SeDebugPrivilege 1840 Client.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

1840 Client.exe

pid	process
1840	Client.exe

pid	process
4540	schtasks.exe
4952	schtasks.exe

description	pid	process
Token: SeDebugPrivilege	2812	Remote Administration Tool.exe
Token: SeDebugPrivilege	1840	Client.exe

pid	process
1840	Client.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

Remote Administration Tool.exeClient.exe

description	pid	process	target process
PID 2812 wrote to memory of 4540	2812	Remote Administration Tool.exe	schtasks.exe
PID 2812 wrote to memory of 4540	2812	Remote Administration Tool.exe	schtasks.exe
PID 2812 wrote to memory of 1840	2812	Remote Administration Tool.exe	Client.exe
PID 2812 wrote to memory of 1840	2812	Remote Administration Tool.exe	Client.exe
PID 1840 wrote to memory of 4952	1840	Client.exe	schtasks.exe
PID 1840 wrote to memory of 4952	1840	Client.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\Remote Administration Tool.exe
"C:\Users\Admin\AppData\Local\Temp\Remote Administration Tool.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2812

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Realtek Audio" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:4540

C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1840

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "Realtek Audio" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:4952

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

T1053

Persistence

Scheduled Task/Job

T1053

Privilege Escalation

Scheduled Task/Job

T1053

Defense Evasion

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

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

MD5
73dcb3b3b59192b45f1975fc7a8e9d08

SHA1
5fdaa30f92acc816c3b43db076f98c91391a3588

SHA256
d580d7cf10f4eb1cd8aa0cbf80c30f832a0f052c33cdc3d1cf3710e6b67528a8

SHA512
adce937291bf7c34e255d4b9785884552828cc07fc00b78842402e72e5addb31f61265c2aec593f5bdc1f041bdafd93758bfbc102c8ab25e4bbc7819c16aacc7

Download Submit
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
Filesize
3.1MB

MD5
73dcb3b3b59192b45f1975fc7a8e9d08

SHA1
5fdaa30f92acc816c3b43db076f98c91391a3588

SHA256
d580d7cf10f4eb1cd8aa0cbf80c30f832a0f052c33cdc3d1cf3710e6b67528a8

SHA512
adce937291bf7c34e255d4b9785884552828cc07fc00b78842402e72e5addb31f61265c2aec593f5bdc1f041bdafd93758bfbc102c8ab25e4bbc7819c16aacc7

Download Submit
memory/1840-146-0x000000001C590000-0x000000001C642000-memory.dmp

Filesize
712KB

Download
memory/1840-143-0x00007FFB695A0000-0x00007FFB6A061000-memory.dmp

Filesize
10.8MB

Download
memory/1840-144-0x000000001BC40000-0x000000001BC50000-memory.dmp

Filesize
64KB

Download
memory/1840-145-0x000000001C480000-0x000000001C4D0000-memory.dmp

Filesize
320KB

Download
memory/1840-149-0x000000001C510000-0x000000001C522000-memory.dmp

Filesize
72KB

Download
memory/1840-150-0x000000001CD90000-0x000000001CDCC000-memory.dmp

Filesize
240KB

Download
memory/1840-151-0x00007FFB695A0000-0x00007FFB6A061000-memory.dmp

Filesize
10.8MB

Download
memory/1840-152-0x000000001BC40000-0x000000001BC50000-memory.dmp

Filesize
64KB

Download
memory/2812-135-0x0000000002880000-0x0000000002890000-memory.dmp

Filesize
64KB

Download
memory/2812-133-0x0000000000500000-0x0000000000824000-memory.dmp

Filesize
3.1MB

Download
memory/2812-142-0x00007FFB695A0000-0x00007FFB6A061000-memory.dmp

Filesize
10.8MB

Download
memory/2812-134-0x00007FFB695A0000-0x00007FFB6A061000-memory.dmp

Filesize
10.8MB

Download