quasar | 5a72c2a12e0e42313c5d01277d3b26f52810a9753e31883f5f3e7a73a0021870

General

Target

0x0008000000013a18-65.exe
Size

535KB
MD5

4d97786ab8047ad6c08532ed7a017573
SHA1

a64d07233d813f9a085722295dca62ca726e291a
SHA256

5a72c2a12e0e42313c5d01277d3b26f52810a9753e31883f5f3e7a73a0021870
SHA512

9224f6c0af0bb3aa6804e09b36617d2ecf762caf81ec0f2627553788f7045d09878b41ddb63a1d0779973cba52d2f1d59f69bc6c826ad8bb0d807444abab87d2

Score

10^/10

quasar venomrat v/r/b evasion rat rootkit spyware stealer suricata trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

V/R/B

C2

siyatermi.duckdns.org:1518

Mutex

VNM_MUTEX_mJ6pCWZMe3OMOha5bj

Attributes

encryption_key
g1Bi32PXFGwyBI9DJGTD
install_name
Start Process.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Browser Module
subdirectory
Sys Resources

Signatures

Contains code to disable Windows Defender 3 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

Processes:

resource	yara_rule
behavioral2/memory/4284-130-0x0000000000140000-0x00000000001CC000-memory.dmp	disable_win_def
C:\Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe	disable_win_def
C:\Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe	disable_win_def

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Modify Existing Service

T1031

Disabling Security Tools

T1089

Processes:

0x0008000000013a18-65.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection	0x0008000000013a18-65.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	0x0008000000013a18-65.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	0x0008000000013a18-65.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	0x0008000000013a18-65.exe

Quasar Payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4284-130-0x0000000000140000-0x00000000001CC000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe	family_quasar
C:\Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe	family_quasar

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar
VenomRAT
VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.
rat rootkit stealer venomrat
suricata: ET MALWARE Common RAT Connectivity Check Observed
suricata: ET MALWARE Common RAT Connectivity Check Observed
suricata
Executes dropped EXE 1 IoCs

Processes:

Start Process.exe

pid process

1584 Start Process.exe

pid	process
1584	Start Process.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

0x0008000000013a18-65.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	0x0008000000013a18-65.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

0x0008000000013a18-65.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	0x0008000000013a18-65.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	0x0008000000013a18-65.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

9 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

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

432 schtasks.exe
1948 schtasks.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

1416 PING.EXE

flow	ioc
9	ip-api.com

pid	process
432	schtasks.exe
1948	schtasks.exe

pid	process
1416	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

powershell.exe0x0008000000013a18-65.exe0x0008000000013a18-65.exe

pid	process
876	powershell.exe
876	powershell.exe
4284	0x0008000000013a18-65.exe
4284	0x0008000000013a18-65.exe
4284	0x0008000000013a18-65.exe
4284	0x0008000000013a18-65.exe
4284	0x0008000000013a18-65.exe
4284	0x0008000000013a18-65.exe
4284	0x0008000000013a18-65.exe
2432	0x0008000000013a18-65.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

0x0008000000013a18-65.exepowershell.exeStart Process.exe0x0008000000013a18-65.exe

description	pid	process
Token: SeDebugPrivilege	4284	0x0008000000013a18-65.exe
Token: SeDebugPrivilege	876	powershell.exe
Token: SeDebugPrivilege	1584	Start Process.exe
Token: SeDebugPrivilege	1584	Start Process.exe
Token: SeDebugPrivilege	2432	0x0008000000013a18-65.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Start Process.exe

pid process

1584 Start Process.exe

pid	process
1584	Start Process.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

0x0008000000013a18-65.exeStart Process.execmd.execmd.exe

description	pid	process	target process
PID 4284 wrote to memory of 432	4284	0x0008000000013a18-65.exe	schtasks.exe
PID 4284 wrote to memory of 432	4284	0x0008000000013a18-65.exe	schtasks.exe
PID 4284 wrote to memory of 432	4284	0x0008000000013a18-65.exe	schtasks.exe
PID 4284 wrote to memory of 1584	4284	0x0008000000013a18-65.exe	Start Process.exe
PID 4284 wrote to memory of 1584	4284	0x0008000000013a18-65.exe	Start Process.exe
PID 4284 wrote to memory of 1584	4284	0x0008000000013a18-65.exe	Start Process.exe
PID 4284 wrote to memory of 876	4284	0x0008000000013a18-65.exe	powershell.exe
PID 4284 wrote to memory of 876	4284	0x0008000000013a18-65.exe	powershell.exe
PID 4284 wrote to memory of 876	4284	0x0008000000013a18-65.exe	powershell.exe
PID 1584 wrote to memory of 1948	1584	Start Process.exe	schtasks.exe
PID 1584 wrote to memory of 1948	1584	Start Process.exe	schtasks.exe
PID 1584 wrote to memory of 1948	1584	Start Process.exe	schtasks.exe
PID 4284 wrote to memory of 4540	4284	0x0008000000013a18-65.exe	cmd.exe
PID 4284 wrote to memory of 4540	4284	0x0008000000013a18-65.exe	cmd.exe
PID 4284 wrote to memory of 4540	4284	0x0008000000013a18-65.exe	cmd.exe
PID 4540 wrote to memory of 3392	4540	cmd.exe	cmd.exe
PID 4540 wrote to memory of 3392	4540	cmd.exe	cmd.exe
PID 4540 wrote to memory of 3392	4540	cmd.exe	cmd.exe
PID 4284 wrote to memory of 3912	4284	0x0008000000013a18-65.exe	cmd.exe
PID 4284 wrote to memory of 3912	4284	0x0008000000013a18-65.exe	cmd.exe
PID 4284 wrote to memory of 3912	4284	0x0008000000013a18-65.exe	cmd.exe
PID 3912 wrote to memory of 3204	3912	cmd.exe	chcp.com
PID 3912 wrote to memory of 3204	3912	cmd.exe	chcp.com
PID 3912 wrote to memory of 3204	3912	cmd.exe	chcp.com
PID 3912 wrote to memory of 1416	3912	cmd.exe	PING.EXE
PID 3912 wrote to memory of 1416	3912	cmd.exe	PING.EXE
PID 3912 wrote to memory of 1416	3912	cmd.exe	PING.EXE
PID 3912 wrote to memory of 2432	3912	cmd.exe	0x0008000000013a18-65.exe
PID 3912 wrote to memory of 2432	3912	cmd.exe	0x0008000000013a18-65.exe
PID 3912 wrote to memory of 2432	3912	cmd.exe	0x0008000000013a18-65.exe

C:\Users\Admin\AppData\Local\Temp\0x0008000000013a18-65.exe
"C:\Users\Admin\AppData\Local\Temp\0x0008000000013a18-65.exe"
1⤵
- Modifies Windows Defender Real-time Protection settings
- Checks computer location settings
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4284
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Browser Module" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\0x0008000000013a18-65.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:432
- C:\Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe
  "C:\Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1584
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Browser Module" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:1948
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:876
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4540
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:3392
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\q0FTDFlqjGYl.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3912
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:3204
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:1416
- - C:\Users\Admin\AppData\Local\Temp\0x0008000000013a18-65.exe
    "C:\Users\Admin\AppData\Local\Temp\0x0008000000013a18-65.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2432

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Modify Existing Service

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Disabling Security Tools

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\0x0008000000013a18-65.exe.log

Filesize
1KB

MD5
10eab9c2684febb5327b6976f2047587

SHA1
a12ed54146a7f5c4c580416aecb899549712449e

SHA256
f49dbd55029bfbc15134f7c6a4f967d6c39142c63f2e8f1f8c78fab108a2c928

SHA512
7e5fd90fffae723bd0c662a90e0730b507805f072771ee673d1d8c262dbf60c8a03ba5fe088f699a97c2e886380de158b2ccd59ee62e3d012dd6dd14ea9d0e50

Download Submit
C:\Users\Admin\AppData\Local\Temp\q0FTDFlqjGYl.bat

Filesize
218B

MD5
302d58966603a4015c24984b61702bb4

SHA1
3c9644bbf7ef131cbe76ea45e4106591ec19813a

SHA256
37ebf9eb2c9d56b4b3a1494652cce5aa90b6611409aff48f462af429a2cee2d8

SHA512
7b87d73b7f70d119aa03587bd01b8d2c3bf6a13c29ca20a0e073a26d1adb743794b974a7ada0b6a20819f5fa5b3d67f35c2994c0bb41d0c0f34129314fb0a468

Download Submit
C:\Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe

Filesize
535KB

MD5
4d97786ab8047ad6c08532ed7a017573

SHA1
a64d07233d813f9a085722295dca62ca726e291a

SHA256
5a72c2a12e0e42313c5d01277d3b26f52810a9753e31883f5f3e7a73a0021870

SHA512
9224f6c0af0bb3aa6804e09b36617d2ecf762caf81ec0f2627553788f7045d09878b41ddb63a1d0779973cba52d2f1d59f69bc6c826ad8bb0d807444abab87d2

Download Submit
C:\Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe

Filesize
535KB

MD5
4d97786ab8047ad6c08532ed7a017573

SHA1
a64d07233d813f9a085722295dca62ca726e291a

SHA256
5a72c2a12e0e42313c5d01277d3b26f52810a9753e31883f5f3e7a73a0021870

SHA512
9224f6c0af0bb3aa6804e09b36617d2ecf762caf81ec0f2627553788f7045d09878b41ddb63a1d0779973cba52d2f1d59f69bc6c826ad8bb0d807444abab87d2

Download Submit
memory/432-136-0x0000000000000000-mapping.dmp

Download
memory/876-148-0x0000000007360000-0x0000000007392000-memory.dmp

Filesize
200KB

Download
memory/876-150-0x0000000006960000-0x000000000697E000-memory.dmp

Filesize
120KB

Download
memory/876-157-0x00000000079D0000-0x00000000079D8000-memory.dmp

Filesize
32KB

Download
memory/876-156-0x00000000079E0000-0x00000000079FA000-memory.dmp

Filesize
104KB

Download
memory/876-155-0x00000000078E0000-0x00000000078EE000-memory.dmp

Filesize
56KB

Download
memory/876-140-0x0000000000000000-mapping.dmp

Download
memory/876-141-0x0000000002A80000-0x0000000002AB6000-memory.dmp

Filesize
216KB

Download
memory/876-142-0x0000000005510000-0x0000000005B38000-memory.dmp

Filesize
6.2MB

Download
memory/876-143-0x0000000005400000-0x0000000005422000-memory.dmp

Filesize
136KB

Download
memory/876-144-0x00000000054A0000-0x0000000005506000-memory.dmp

Filesize
408KB

Download
memory/876-154-0x0000000007920000-0x00000000079B6000-memory.dmp

Filesize
600KB

Download
memory/876-146-0x00000000063A0000-0x00000000063BE000-memory.dmp

Filesize
120KB

Download
memory/876-153-0x0000000007710000-0x000000000771A000-memory.dmp

Filesize
40KB

Download
memory/876-152-0x00000000076A0000-0x00000000076BA000-memory.dmp

Filesize
104KB

Download
memory/876-149-0x0000000070510000-0x000000007055C000-memory.dmp

Filesize
304KB

Download
memory/876-151-0x0000000007CF0000-0x000000000836A000-memory.dmp

Filesize
6.5MB

Download
memory/1416-163-0x0000000000000000-mapping.dmp

Download
memory/1584-137-0x0000000000000000-mapping.dmp

Download
memory/1584-147-0x00000000061A0000-0x00000000061AA000-memory.dmp

Filesize
40KB

Download
memory/1948-145-0x0000000000000000-mapping.dmp

Download
memory/2432-164-0x0000000000000000-mapping.dmp

Download
memory/3204-162-0x0000000000000000-mapping.dmp

Download
memory/3392-159-0x0000000000000000-mapping.dmp

Download
memory/3912-160-0x0000000000000000-mapping.dmp

Download
memory/4284-133-0x0000000004FE0000-0x0000000005046000-memory.dmp

Filesize
408KB

Download
memory/4284-134-0x00000000050F0000-0x0000000005102000-memory.dmp

Filesize
72KB

Download
memory/4284-135-0x0000000005FD0000-0x000000000600C000-memory.dmp

Filesize
240KB

Download
memory/4284-132-0x0000000004C40000-0x0000000004CD2000-memory.dmp

Filesize
584KB

Download
memory/4284-130-0x0000000000140000-0x00000000001CC000-memory.dmp

Filesize
560KB

Download
memory/4284-131-0x0000000005120000-0x00000000056C4000-memory.dmp

Filesize
5.6MB

Download
memory/4540-158-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads