quasar | 288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c

Analysis

max time kernel
130s
max time network
146s
platform
windows7_x64
resource
win7-20220414-en
submitted
03-05-2022 20:03

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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

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 5 IoCs

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

Processes:

resource	yara_rule
behavioral1/memory/776-54-0x0000000001070000-0x0000000001120000-memory.dmp	disable_win_def
behavioral1/files/0x000a0000000122fe-57.dat	disable_win_def
behavioral1/files/0x000a0000000122fe-59.dat	disable_win_def
behavioral1/files/0x000a0000000122fe-60.dat	disable_win_def
behavioral1/memory/320-62-0x0000000000B30000-0x0000000000BE0000-memory.dmp	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 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/776-54-0x0000000001070000-0x0000000001120000-memory.dmp	family_quasar
behavioral1/files/0x000a0000000122fe-57.dat	family_quasar
behavioral1/files/0x000a0000000122fe-59.dat	family_quasar
behavioral1/files/0x000a0000000122fe-60.dat	family_quasar
behavioral1/memory/320-62-0x0000000000B30000-0x0000000000BE0000-memory.dmp	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
320	windowsrc.exe

Loads dropped DLL 1 IoCs

Processes:

288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

pid	Process
776	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-1-5-21-1083475884-596052423-1669053738-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Registry Handler = "\"C:\\Users\\Admin\\AppData\\Roaming\\bin\\windowsrc.exe\""	windowsrc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1083475884-596052423-1669053738-1000\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 1 IoCs

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

Processes:

flow	ioc
1	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
1112	schtasks.exe
1880	schtasks.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
956	PING.EXE

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exe288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

pid	Process
1292	powershell.exe
776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
1976	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exewindowsrc.exepowershell.exe288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

description	pid	Process
Token: SeDebugPrivilege	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
Token: SeDebugPrivilege	320	windowsrc.exe
Token: SeDebugPrivilege	320	windowsrc.exe
Token: SeDebugPrivilege	1292	powershell.exe
Token: SeDebugPrivilege	1976	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

windowsrc.exe

pid	Process
320	windowsrc.exe

Suspicious use of WriteProcessMemory 40 IoCs

Processes:

288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exewindowsrc.execmd.execmd.exe

description	pid	Process	procid_target
PID 776 wrote to memory of 1112	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	29
PID 776 wrote to memory of 1112	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	29
PID 776 wrote to memory of 1112	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	29
PID 776 wrote to memory of 1112	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	29
PID 776 wrote to memory of 320	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	31
PID 776 wrote to memory of 320	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	31
PID 776 wrote to memory of 320	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	31
PID 776 wrote to memory of 320	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	31
PID 776 wrote to memory of 1292	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	32
PID 776 wrote to memory of 1292	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	32
PID 776 wrote to memory of 1292	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	32
PID 776 wrote to memory of 1292	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	32
PID 320 wrote to memory of 1880	320	windowsrc.exe	34
PID 320 wrote to memory of 1880	320	windowsrc.exe	34
PID 320 wrote to memory of 1880	320	windowsrc.exe	34
PID 320 wrote to memory of 1880	320	windowsrc.exe	34
PID 776 wrote to memory of 1416	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	36
PID 776 wrote to memory of 1416	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	36
PID 776 wrote to memory of 1416	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	36
PID 776 wrote to memory of 1416	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	36
PID 1416 wrote to memory of 1064	1416	cmd.exe	38
PID 1416 wrote to memory of 1064	1416	cmd.exe	38
PID 1416 wrote to memory of 1064	1416	cmd.exe	38
PID 1416 wrote to memory of 1064	1416	cmd.exe	38
PID 776 wrote to memory of 600	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	39
PID 776 wrote to memory of 600	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	39
PID 776 wrote to memory of 600	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	39
PID 776 wrote to memory of 600	776	288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe	39
PID 600 wrote to memory of 1676	600	cmd.exe	41
PID 600 wrote to memory of 1676	600	cmd.exe	41
PID 600 wrote to memory of 1676	600	cmd.exe	41
PID 600 wrote to memory of 1676	600	cmd.exe	41
PID 600 wrote to memory of 956	600	cmd.exe	42
PID 600 wrote to memory of 956	600	cmd.exe	42
PID 600 wrote to memory of 956	600	cmd.exe	42
PID 600 wrote to memory of 956	600	cmd.exe	42
PID 600 wrote to memory of 1976	600	cmd.exe	43
PID 600 wrote to memory of 1976	600	cmd.exe	43
PID 600 wrote to memory of 1976	600	cmd.exe	43
PID 600 wrote to memory of 1976	600	cmd.exe	43

C:\Users\Admin\AppData\Local\Temp\288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
"C:\Users\Admin\AppData\Local\Temp\288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe"
1⤵
- Loads dropped DLL
- Windows security modification
- Adds Run key to start application
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:776
- 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:1112
- 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:320
- - 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:1880
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1292
- 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:1416
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:1064
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\Q8xNiqgqSt77.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:600
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:1676
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:956
- - C:\Users\Admin\AppData\Local\Temp\288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe
    "C:\Users\Admin\AppData\Local\Temp\288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1976

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Modify Existing Service

T1031

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Disabling Security Tools

T1089

Install Root Certificate

T1130

Modify Registry

T1112

Credential Access

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Q8xNiqgqSt77.bat

Filesize
261B

MD5
1ae650964617d392e24e6f5272c039e4

SHA1
21eb4e52a9d698223ef7cd19810883a701f927a7

SHA256
6e5acb046bfb607186944f0911412421a2266007ae0533435847637031cc1630

SHA512
5ccd178cd2f8720ce6f50ed6b0a8060adbbcba7e72f5736e8dec97808eb0cf060c8dfb7b0dd48e97b1812dac526d64cb9ccd5335f9a373b953095ff730c5a84f

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

Filesize
683KB

MD5
497e3b749e37fa682a0cf5f5ec869296

SHA1
b6405eb80e48a075489dae999c3291eff5246112

SHA256
288cf51166bb6407c0f13c70a31fefba81ca381bc79dda54af39370ee479d47c

SHA512
86d137a1d8dd452c94c42293b2d2c05d3a10c017c2f1f6f18b2ca54c75925fcd0745d5e59e9deb9d533aeaf824a1e727513a2bf852d96c68e2c1f252ce84fd93

Download Submit
memory/320-62-0x0000000000B30000-0x0000000000BE0000-memory.dmp

Filesize
704KB

Download
memory/320-58-0x0000000000000000-mapping.dmp

Download
memory/600-69-0x0000000000000000-mapping.dmp

Download
memory/776-55-0x00000000753B1000-0x00000000753B3000-memory.dmp

Filesize
8KB

Download
memory/776-54-0x0000000001070000-0x0000000001120000-memory.dmp

Filesize
704KB

Download
memory/956-72-0x0000000000000000-mapping.dmp

Download
memory/1064-68-0x0000000000000000-mapping.dmp

Download
memory/1112-56-0x0000000000000000-mapping.dmp

Download
memory/1292-66-0x000000006EB20000-0x000000006F0CB000-memory.dmp

Filesize
5.7MB

Download
memory/1292-61-0x0000000000000000-mapping.dmp

Download
memory/1416-67-0x0000000000000000-mapping.dmp

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memory/1676-71-0x0000000000000000-mapping.dmp

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memory/1880-64-0x0000000000000000-mapping.dmp

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memory/1976-73-0x0000000000000000-mapping.dmp

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