quasar | d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b

Analysis

max time kernel
149s
max time network
148s
platform
windows7_x64
resource
win7v20201028
submitted
02-03-2021 11:10

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General

Target

d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe
Size

534KB
MD5

3eb993c8d8b647f850cfa469d57a2dec
SHA1

da5dc696590815cb6389c693a7edad6e65722c51
SHA256

d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b
SHA512

df2b679ea062146b3bb2be292a4ec09671e107abab7fbb7784aa9a78a22baa37e24220796c07b0abbe2cdf6de5b56707567c99ac73badceac075c93482611061

Score

10^/10

quasar venomrat evasion rat rootkit spyware stealer trojan

Malware Config

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.

resource	yara_rule
behavioral1/files/0x00050000000130fd-7.dat	disable_win_def
behavioral1/files/0x00050000000130fd-9.dat	disable_win_def
behavioral1/files/0x00050000000130fd-10.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 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

Executes dropped EXE 1 IoCs

pid	Process
416	Client.exe

Loads dropped DLL 1 IoCs

pid	Process
1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.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.

flow	ioc
2	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

pid	Process
1640	schtasks.exe
932	schtasks.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
964	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1492	powershell.exe
1492	powershell.exe
1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe
1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe
1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe
1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe
1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe
1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe
1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe
920	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe
Token: SeDebugPrivilege	1492	powershell.exe
Token: SeDebugPrivilege	416	Client.exe
Token: SeDebugPrivilege	416	Client.exe
Token: SeDebugPrivilege	920	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
416	Client.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 1724 wrote to memory of 1640	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	30
PID 1724 wrote to memory of 1640	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	30
PID 1724 wrote to memory of 1640	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	30
PID 1724 wrote to memory of 1640	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	30
PID 1724 wrote to memory of 416	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	32
PID 1724 wrote to memory of 416	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	32
PID 1724 wrote to memory of 416	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	32
PID 1724 wrote to memory of 416	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	32
PID 1724 wrote to memory of 1492	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	33
PID 1724 wrote to memory of 1492	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	33
PID 1724 wrote to memory of 1492	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	33
PID 1724 wrote to memory of 1492	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	33
PID 416 wrote to memory of 932	416	Client.exe	35
PID 416 wrote to memory of 932	416	Client.exe	35
PID 416 wrote to memory of 932	416	Client.exe	35
PID 416 wrote to memory of 932	416	Client.exe	35
PID 1724 wrote to memory of 316	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	37
PID 1724 wrote to memory of 316	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	37
PID 1724 wrote to memory of 316	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	37
PID 1724 wrote to memory of 316	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	37
PID 316 wrote to memory of 1556	316	cmd.exe	39
PID 316 wrote to memory of 1556	316	cmd.exe	39
PID 316 wrote to memory of 1556	316	cmd.exe	39
PID 316 wrote to memory of 1556	316	cmd.exe	39
PID 1724 wrote to memory of 1628	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	40
PID 1724 wrote to memory of 1628	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	40
PID 1724 wrote to memory of 1628	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	40
PID 1724 wrote to memory of 1628	1724	d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe	40
PID 1628 wrote to memory of 1688	1628	cmd.exe	42
PID 1628 wrote to memory of 1688	1628	cmd.exe	42
PID 1628 wrote to memory of 1688	1628	cmd.exe	42
PID 1628 wrote to memory of 1688	1628	cmd.exe	42
PID 1628 wrote to memory of 964	1628	cmd.exe	43
PID 1628 wrote to memory of 964	1628	cmd.exe	43
PID 1628 wrote to memory of 964	1628	cmd.exe	43
PID 1628 wrote to memory of 964	1628	cmd.exe	43
PID 1628 wrote to memory of 920	1628	cmd.exe	44
PID 1628 wrote to memory of 920	1628	cmd.exe	44
PID 1628 wrote to memory of 920	1628	cmd.exe	44
PID 1628 wrote to memory of 920	1628	cmd.exe	44

C:\Users\Admin\AppData\Local\Temp\d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe
"C:\Users\Admin\AppData\Local\Temp\d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe"
1⤵
- Loads dropped DLL
- Windows security modification
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1724
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "CheckerFortnite" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1640
- 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:416
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "CheckerFortnite" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:932
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1492
- 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:316
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:1556
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\BdnMdbHKu12w.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1628
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:1688
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:964
- - C:\Users\Admin\AppData\Local\Temp\d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe
    "C:\Users\Admin\AppData\Local\Temp\d9fffd6edeeaeb271645ebd329755660356ed84bbfdd773c7c3aa1d4b594904b.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:920

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Modify Existing Service

T1031

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

memory/416-12-0x0000000074D20000-0x000000007540E000-memory.dmp

Filesize
6.9MB

Download
memory/416-13-0x0000000000870000-0x0000000000871000-memory.dmp

Filesize
4KB

Download
memory/416-18-0x0000000004AF0000-0x0000000004AF1000-memory.dmp

Filesize
4KB

Download
memory/920-65-0x0000000074D20000-0x000000007540E000-memory.dmp

Filesize
6.9MB

Download
memory/920-66-0x0000000000AA0000-0x0000000000AA1000-memory.dmp

Filesize
4KB

Download
memory/920-68-0x0000000000490000-0x0000000000491000-memory.dmp

Filesize
4KB

Download
memory/1492-22-0x0000000005260000-0x0000000005261000-memory.dmp

Filesize
4KB

Download
memory/1492-42-0x0000000005630000-0x0000000005631000-memory.dmp

Filesize
4KB

Download
memory/1492-21-0x0000000000D00000-0x0000000000D01000-memory.dmp

Filesize
4KB

Download
memory/1492-19-0x0000000004850000-0x0000000004851000-memory.dmp

Filesize
4KB

Download
memory/1492-24-0x0000000004852000-0x0000000004853000-memory.dmp

Filesize
4KB

Download
memory/1492-27-0x0000000006000000-0x0000000006001000-memory.dmp

Filesize
4KB

Download
memory/1492-32-0x00000000060C0000-0x00000000060C1000-memory.dmp

Filesize
4KB

Download
memory/1492-34-0x0000000006100000-0x0000000006101000-memory.dmp

Filesize
4KB

Download
memory/1492-33-0x000000007EF30000-0x000000007EF31000-memory.dmp

Filesize
4KB

Download
memory/1492-41-0x00000000062A0000-0x00000000062A1000-memory.dmp

Filesize
4KB

Download
memory/1492-20-0x0000000004890000-0x0000000004891000-memory.dmp

Filesize
4KB

Download
memory/1492-56-0x0000000006320000-0x0000000006321000-memory.dmp

Filesize
4KB

Download
memory/1492-57-0x0000000006330000-0x0000000006331000-memory.dmp

Filesize
4KB

Download
memory/1492-17-0x0000000000B50000-0x0000000000B51000-memory.dmp

Filesize
4KB

Download
memory/1492-15-0x00000000761E1000-0x00000000761E3000-memory.dmp

Filesize
8KB

Download
memory/1492-16-0x0000000074D20000-0x000000007540E000-memory.dmp

Filesize
6.9MB

Download
memory/1724-2-0x0000000074D20000-0x000000007540E000-memory.dmp

Filesize
6.9MB

Download
memory/1724-5-0x0000000004910000-0x0000000004911000-memory.dmp

Filesize
4KB

Download
memory/1724-3-0x00000000009B0000-0x00000000009B1000-memory.dmp

Filesize
4KB

Download