quasar | bacfd4551eb96cd6a853ee55f7e1839fdffedf1309d00932f603d214bc4798fb

Resubmissions

21-11-2024 23:40

241121-3n73pazmey 10

21-11-2024 23:28

241121-3gd62axjaj 10

Analysis

max time kernel
149s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21-11-2024 23:28

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General

Target

xTSRv1.1.0.6.exe
Size

344KB
MD5

58862052bc9830249a3481c1f598bfa6
SHA1

a1606388aae362146a32faf45815cb7aa2e0a3ec
SHA256

bacfd4551eb96cd6a853ee55f7e1839fdffedf1309d00932f603d214bc4798fb
SHA512

f5bb7b412ddb826d262b784d9538c2ea30d217e1d23691176c53735021ada2fec13f2559ecfa6096ae4860e004211897dc0c69b9b04a5451d2e3feb6bec80215
SSDEEP

6144:u4HFNUocJ7fDktpXaWgvkoXZL8GaY4900NuiF1D48q3O:/FNUzJ7fOpXa7PXZI4r0tq3

Score

10^/10

quasar discovery spyware trojan

Malware Config

Signatures

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

Executes dropped EXE 1 IoCs

Processes:

driver.exe

pid	Process
2836	driver.exe

Loads dropped DLL 2 IoCs

Processes:

xTSRv1.1.0.6.exe

pid	Process
1640	xTSRv1.1.0.6.exe
1640	xTSRv1.1.0.6.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow	ioc
2	ip-api.com

System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

Processes:

schtasks.exedriver.exeschtasks.exexTSRv1.1.0.6.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	driver.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	xTSRv1.1.0.6.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exeschtasks.exe

pid	Process
2244	schtasks.exe
2864	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

Processes:

driver.exe

pid	Process
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe
2836	driver.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

driver.exe

description	pid	Process
Token: SeDebugPrivilege	2836	driver.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

driver.exe

pid	Process
2836	driver.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

xTSRv1.1.0.6.exedriver.exe

description	pid	Process	procid_target
PID 1640 wrote to memory of 2244	1640	xTSRv1.1.0.6.exe	31
PID 1640 wrote to memory of 2244	1640	xTSRv1.1.0.6.exe	31
PID 1640 wrote to memory of 2244	1640	xTSRv1.1.0.6.exe	31
PID 1640 wrote to memory of 2244	1640	xTSRv1.1.0.6.exe	31
PID 1640 wrote to memory of 2836	1640	xTSRv1.1.0.6.exe	33
PID 1640 wrote to memory of 2836	1640	xTSRv1.1.0.6.exe	33
PID 1640 wrote to memory of 2836	1640	xTSRv1.1.0.6.exe	33
PID 1640 wrote to memory of 2836	1640	xTSRv1.1.0.6.exe	33
PID 2836 wrote to memory of 2864	2836	driver.exe	34
PID 2836 wrote to memory of 2864	2836	driver.exe	34
PID 2836 wrote to memory of 2864	2836	driver.exe	34
PID 2836 wrote to memory of 2864	2836	driver.exe	34

C:\Users\Admin\AppData\Local\Temp\xTSRv1.1.0.6.exe
"C:\Users\Admin\AppData\Local\Temp\xTSRv1.1.0.6.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1640
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\xTSRv1.1.0.6.exe" /rl HIGHEST /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2244
- C:\Users\Admin\AppData\Roaming\driver\driver.exe
  "C:\Users\Admin\AppData\Roaming\driver\driver.exe" -d2
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2836
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Windows Defender" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\driver\driver.exe" /rl HIGHEST /f
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2864

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Roaming\driver\driver.exe

Filesize
344KB

MD5
58862052bc9830249a3481c1f598bfa6

SHA1
a1606388aae362146a32faf45815cb7aa2e0a3ec

SHA256
bacfd4551eb96cd6a853ee55f7e1839fdffedf1309d00932f603d214bc4798fb

SHA512
f5bb7b412ddb826d262b784d9538c2ea30d217e1d23691176c53735021ada2fec13f2559ecfa6096ae4860e004211897dc0c69b9b04a5451d2e3feb6bec80215

Download Submit
memory/1640-0-0x0000000073F6E000-0x0000000073F6F000-memory.dmp

Filesize
4KB

Download
memory/1640-1-0x0000000000840000-0x000000000089A000-memory.dmp

Filesize
360KB

Download
memory/1640-2-0x0000000073F60000-0x000000007464E000-memory.dmp

Filesize
6.9MB

Download
memory/1640-15-0x0000000073F60000-0x000000007464E000-memory.dmp

Filesize
6.9MB

Download
memory/2836-14-0x0000000073F60000-0x000000007464E000-memory.dmp

Filesize
6.9MB

Download
memory/2836-13-0x0000000073F60000-0x000000007464E000-memory.dmp

Filesize
6.9MB

Download
memory/2836-12-0x0000000001080000-0x00000000010DA000-memory.dmp

Filesize
360KB

Download
memory/2836-17-0x0000000073F60000-0x000000007464E000-memory.dmp

Filesize
6.9MB

Download
memory/2836-18-0x0000000073F60000-0x000000007464E000-memory.dmp

Filesize
6.9MB

Download