quasar | 288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c

General

Target

288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
Size

683KB
MD5

497e3b749e37fa682a0cf5f5ec869296
SHA1

b6405eb80e48a075489dae999c3291eff5246112
SHA256

288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c
SHA512

86d137a1d8dd452c94c42293b2d2c05d3a10c017c2f1f6f18b2ca54c75925fcd0745d5e59e9deb9d533aeaf824a1e727513a2bf852d96c68e2c1f252ce84fd93

Score

10^/10

quasar venomrat $77systemtelemtry evasion persistence rat rootkit spyware stealer suricata trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

$77systemtelemtry

C2

192.168.0.44:80

67.61.188.107:80

Mutex

VNM_MUTEX_OplgS6EDrflEgnBXyU

Attributes

encryption_key
tfNbPwosWP6IOHXzQKKG
install_name
windowsrc.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Registry Handler
subdirectory
bin

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/3756-130-0x0000000000430000-0x00000000004E0000-memory.dmp	disable_win_def
behavioral2/files/0x000b000000023147-138.dat	disable_win_def
behavioral2/files/0x000b000000023147-139.dat	disable_win_def

Modifies Windows Defender Real-time Protection settings 3 TTPs
evasion trojan

Modify Registry
T1112

Modify Existing Service
T1031

Disabling Security Tools
T1089

Quasar Payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/3756-130-0x0000000000430000-0x00000000004E0000-memory.dmp	family_quasar
behavioral2/files/0x000b000000023147-138.dat	family_quasar
behavioral2/files/0x000b000000023147-139.dat	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:

windowsrc.exe

pid	Process
4812	windowsrc.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:

288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

windowsrc.exe288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Registry Handler = "\"C:\\Users\\Admin\\AppData\\Roaming\\bin\\windowsrc.exe\""	windowsrc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Registry Handler = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe\""	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

Looks up external IP address via web service 2 IoCs

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

Processes:

flow	ioc
11	ip-api.com
33	api.ipify.org

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
3892	schtasks.exe
4632	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exe288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

pid	Process
4012	powershell.exe
4012	powershell.exe
3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exepowershell.exewindowsrc.exe

description	pid	Process
Token: SeDebugPrivilege	3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
Token: SeDebugPrivilege	4012	powershell.exe
Token: SeDebugPrivilege	4812	windowsrc.exe
Token: SeDebugPrivilege	4812	windowsrc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

windowsrc.exe

pid	Process
4812	windowsrc.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exewindowsrc.execmd.exe

description	pid	Process	procid_target
PID 3756 wrote to memory of 3892	3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	80
PID 3756 wrote to memory of 3892	3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	80
PID 3756 wrote to memory of 3892	3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	80
PID 3756 wrote to memory of 4812	3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	82
PID 3756 wrote to memory of 4812	3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	82
PID 3756 wrote to memory of 4812	3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	82
PID 3756 wrote to memory of 4012	3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	84
PID 3756 wrote to memory of 4012	3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	84
PID 3756 wrote to memory of 4012	3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	84
PID 4812 wrote to memory of 4632	4812	windowsrc.exe	90
PID 4812 wrote to memory of 4632	4812	windowsrc.exe	90
PID 4812 wrote to memory of 4632	4812	windowsrc.exe	90
PID 3756 wrote to memory of 3608	3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	97
PID 3756 wrote to memory of 3608	3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	97
PID 3756 wrote to memory of 3608	3756	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	97
PID 3608 wrote to memory of 4872	3608	cmd.exe	99
PID 3608 wrote to memory of 4872	3608	cmd.exe	99
PID 3608 wrote to memory of 4872	3608	cmd.exe	99

C:\Users\Admin\AppData\Local\Temp\288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
"C:\Users\Admin\AppData\Local\Temp\288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe"
1⤵
- Checks computer location settings
- Windows security modification
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3756
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Windows Registry Handler" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:3892
- C:\Users\Admin\AppData\Roaming\bin\windowsrc.exe
  "C:\Users\Admin\AppData\Roaming\bin\windowsrc.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4812
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Windows Registry Handler" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\bin\windowsrc.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4632
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4012
- 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:3608
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:4872

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Modify Existing Service

1

T1031

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Disabling Security Tools

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\bin\windowsrc.exe

Filesize
683KB

MD5
497e3b749e37fa682a0cf5f5ec869296

SHA1
b6405eb80e48a075489dae999c3291eff5246112

SHA256
288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c

SHA512
86d137a1d8dd452c94c42293b2d2c05d3a10c017c2f1f6f18b2ca54c75925fcd0745d5e59e9deb9d533aeaf824a1e727513a2bf852d96c68e2c1f252ce84fd93

Download Submit
C:\Users\Admin\AppData\Roaming\bin\windowsrc.exe

Filesize
683KB

MD5
497e3b749e37fa682a0cf5f5ec869296

SHA1
b6405eb80e48a075489dae999c3291eff5246112

SHA256
288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c

SHA512
86d137a1d8dd452c94c42293b2d2c05d3a10c017c2f1f6f18b2ca54c75925fcd0745d5e59e9deb9d533aeaf824a1e727513a2bf852d96c68e2c1f252ce84fd93

Download Submit
memory/3608-158-0x0000000000000000-mapping.dmp

Download
memory/3756-130-0x0000000000430000-0x00000000004E0000-memory.dmp

Filesize
704KB

Download
memory/3756-131-0x0000000005480000-0x0000000005A24000-memory.dmp

Filesize
5.6MB

Download
memory/3756-132-0x0000000004F70000-0x0000000005002000-memory.dmp

Filesize
584KB

Download
memory/3756-133-0x0000000004ED0000-0x0000000004F36000-memory.dmp

Filesize
408KB

Download
memory/3756-134-0x0000000005410000-0x0000000005422000-memory.dmp

Filesize
72KB

Download
memory/3756-135-0x00000000060F0000-0x000000000612C000-memory.dmp

Filesize
240KB

Download
memory/3892-136-0x0000000000000000-mapping.dmp

Download
memory/4012-151-0x00000000073A0000-0x00000000073BA000-memory.dmp

Filesize
104KB

Download
memory/4012-147-0x000000006FD70000-0x000000006FDBC000-memory.dmp

Filesize
304KB

Download
memory/4012-142-0x0000000005390000-0x00000000059B8000-memory.dmp

Filesize
6.2MB

Download
memory/4012-143-0x0000000005140000-0x0000000005162000-memory.dmp

Filesize
136KB

Download
memory/4012-144-0x0000000005320000-0x0000000005386000-memory.dmp

Filesize
408KB

Download
memory/4012-145-0x0000000004DA0000-0x0000000004DBE000-memory.dmp

Filesize
120KB

Download
memory/4012-146-0x0000000006650000-0x0000000006682000-memory.dmp

Filesize
200KB

Download
memory/4012-156-0x0000000007630000-0x000000000764A000-memory.dmp

Filesize
104KB

Download
memory/4012-148-0x0000000006630000-0x000000000664E000-memory.dmp

Filesize
120KB

Download
memory/4012-141-0x0000000002710000-0x0000000002746000-memory.dmp

Filesize
216KB

Download
memory/4012-150-0x0000000007A20000-0x000000000809A000-memory.dmp

Filesize
6.5MB

Download
memory/4012-140-0x0000000000000000-mapping.dmp

Download
memory/4012-152-0x0000000007400000-0x000000000740A000-memory.dmp

Filesize
40KB

Download
memory/4012-157-0x0000000007620000-0x0000000007628000-memory.dmp

Filesize
32KB

Download
memory/4012-154-0x0000000007670000-0x0000000007706000-memory.dmp

Filesize
600KB

Download
memory/4012-155-0x00000000075E0000-0x00000000075EE000-memory.dmp

Filesize
56KB

Download
memory/4632-149-0x0000000000000000-mapping.dmp

Download
memory/4812-153-0x0000000006B50000-0x0000000006B5A000-memory.dmp

Filesize
40KB

Download
memory/4812-137-0x0000000000000000-mapping.dmp

Download
memory/4872-159-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads