quasar | 08fb091d9d284795239c1ffd5f06f339b8b6db726198f5325f4ae55c77199402

Analysis

max time kernel
123s
max time network
138s
platform
windows7_x64
resource
win7-20220414-en
submitted
03-05-2022 20:03

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General

Target

Rusher Hack/RusherHackInstaller.exe
Size

683KB
MD5

a8b9706ed1ca326d4673b88fed84db23
SHA1

72fb18cdcd67d83fe1484b8ff93ba477e8082f7d
SHA256

bfc55cb35294fba322924cd2fe7ab9e79875b2cca66419ee5ef6d675b895349c
SHA512

89c5706bba41e6b25ad1f4431eba26df9145c2292f0c42c64c688851c1882004814bf4444f8013efc1504b4bb2bbb4d11896fec7c2e42088604eedadd28ebb9b

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
6opnJj4VnPTLLOS9SdTg
install_name
windowsrc.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Registry Handler
subdirectory
bin

Signatures

Contains code to disable Windows Defender 6 IoCs

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

Processes:

resource	yara_rule
behavioral3/memory/868-54-0x0000000001030000-0x00000000010E0000-memory.dmp	disable_win_def
behavioral3/files/0x000b0000000122e0-57.dat	disable_win_def
behavioral3/files/0x000b0000000122e0-59.dat	disable_win_def
behavioral3/files/0x000b0000000122e0-60.dat	disable_win_def
behavioral3/memory/2028-62-0x0000000000840000-0x00000000008F0000-memory.dmp	disable_win_def
behavioral3/memory/888-74-0x00000000010F0000-0x00000000011A0000-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 6 IoCs

Processes:

resource	yara_rule
behavioral3/memory/868-54-0x0000000001030000-0x00000000010E0000-memory.dmp	family_quasar
behavioral3/files/0x000b0000000122e0-57.dat	family_quasar
behavioral3/files/0x000b0000000122e0-59.dat	family_quasar
behavioral3/files/0x000b0000000122e0-60.dat	family_quasar
behavioral3/memory/2028-62-0x0000000000840000-0x00000000008F0000-memory.dmp	family_quasar
behavioral3/memory/888-74-0x00000000010F0000-0x00000000011A0000-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
2028	windowsrc.exe

Loads dropped DLL 1 IoCs

Processes:

RusherHackInstaller.exe

pid	Process
868	RusherHackInstaller.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

RusherHackInstaller.exe

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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

RusherHackInstaller.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1819626980-2277161760-1023733287-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Registry Handler = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\Rusher Hack\\RusherHackInstaller.exe\""	RusherHackInstaller.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
1116	schtasks.exe
1688	schtasks.exe

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

Processes:

RusherHackInstaller.exe

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

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

Processes:

PING.EXE

pid	Process
1212	PING.EXE

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exeRusherHackInstaller.exeRusherHackInstaller.exe

pid	Process
1772	powershell.exe
868	RusherHackInstaller.exe
868	RusherHackInstaller.exe
868	RusherHackInstaller.exe
868	RusherHackInstaller.exe
868	RusherHackInstaller.exe
868	RusherHackInstaller.exe
868	RusherHackInstaller.exe
888	RusherHackInstaller.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

RusherHackInstaller.exepowershell.exewindowsrc.exeRusherHackInstaller.exe

description	pid	Process
Token: SeDebugPrivilege	868	RusherHackInstaller.exe
Token: SeDebugPrivilege	1772	powershell.exe
Token: SeDebugPrivilege	2028	windowsrc.exe
Token: SeDebugPrivilege	2028	windowsrc.exe
Token: SeDebugPrivilege	888	RusherHackInstaller.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

windowsrc.exe

pid	Process
2028	windowsrc.exe

Suspicious use of WriteProcessMemory 43 IoCs

Processes:

RusherHackInstaller.exewindowsrc.execmd.execmd.exe

description	pid	Process	procid_target
PID 868 wrote to memory of 1116	868	RusherHackInstaller.exe	29
PID 868 wrote to memory of 1116	868	RusherHackInstaller.exe	29
PID 868 wrote to memory of 1116	868	RusherHackInstaller.exe	29
PID 868 wrote to memory of 1116	868	RusherHackInstaller.exe	29
PID 868 wrote to memory of 2028	868	RusherHackInstaller.exe	31
PID 868 wrote to memory of 2028	868	RusherHackInstaller.exe	31
PID 868 wrote to memory of 2028	868	RusherHackInstaller.exe	31
PID 868 wrote to memory of 2028	868	RusherHackInstaller.exe	31
PID 868 wrote to memory of 1772	868	RusherHackInstaller.exe	32
PID 868 wrote to memory of 1772	868	RusherHackInstaller.exe	32
PID 868 wrote to memory of 1772	868	RusherHackInstaller.exe	32
PID 868 wrote to memory of 1772	868	RusherHackInstaller.exe	32
PID 2028 wrote to memory of 1688	2028	windowsrc.exe	34
PID 2028 wrote to memory of 1688	2028	windowsrc.exe	34
PID 2028 wrote to memory of 1688	2028	windowsrc.exe	34
PID 2028 wrote to memory of 1688	2028	windowsrc.exe	34
PID 868 wrote to memory of 672	868	RusherHackInstaller.exe	36
PID 868 wrote to memory of 672	868	RusherHackInstaller.exe	36
PID 868 wrote to memory of 672	868	RusherHackInstaller.exe	36
PID 868 wrote to memory of 672	868	RusherHackInstaller.exe	36
PID 672 wrote to memory of 1380	672	cmd.exe	38
PID 672 wrote to memory of 1380	672	cmd.exe	38
PID 672 wrote to memory of 1380	672	cmd.exe	38
PID 672 wrote to memory of 1380	672	cmd.exe	38
PID 868 wrote to memory of 568	868	RusherHackInstaller.exe	39
PID 868 wrote to memory of 568	868	RusherHackInstaller.exe	39
PID 868 wrote to memory of 568	868	RusherHackInstaller.exe	39
PID 868 wrote to memory of 568	868	RusherHackInstaller.exe	39
PID 568 wrote to memory of 744	568	cmd.exe	41
PID 568 wrote to memory of 744	568	cmd.exe	41
PID 568 wrote to memory of 744	568	cmd.exe	41
PID 568 wrote to memory of 744	568	cmd.exe	41
PID 568 wrote to memory of 1212	568	cmd.exe	42
PID 568 wrote to memory of 1212	568	cmd.exe	42
PID 568 wrote to memory of 1212	568	cmd.exe	42
PID 568 wrote to memory of 1212	568	cmd.exe	42
PID 568 wrote to memory of 888	568	cmd.exe	43
PID 568 wrote to memory of 888	568	cmd.exe	43
PID 568 wrote to memory of 888	568	cmd.exe	43
PID 568 wrote to memory of 888	568	cmd.exe	43
PID 568 wrote to memory of 888	568	cmd.exe	43
PID 568 wrote to memory of 888	568	cmd.exe	43
PID 568 wrote to memory of 888	568	cmd.exe	43

C:\Users\Admin\AppData\Local\Temp\Rusher Hack\RusherHackInstaller.exe
"C:\Users\Admin\AppData\Local\Temp\Rusher Hack\RusherHackInstaller.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:868
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Windows Registry Handler" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Rusher Hack\RusherHackInstaller.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1116
- C:\Users\Admin\AppData\Roaming\bin\windowsrc.exe
  "C:\Users\Admin\AppData\Roaming\bin\windowsrc.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2028
- - 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:1688
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1772
- 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:672
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:1380
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\pV3gp6LBrgby.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:568
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:744
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:1212
- - C:\Users\Admin\AppData\Local\Temp\Rusher Hack\RusherHackInstaller.exe
    "C:\Users\Admin\AppData\Local\Temp\Rusher Hack\RusherHackInstaller.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:888

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\pV3gp6LBrgby.bat

Filesize
228B

MD5
af93038f50afd0ff75900b94df946f7f

SHA1
d1fca840f28989907204e28f405c9597836ee05f

SHA256
a5744892b9b34283e43ef0d05689c077c75046d09a46e8e68ac4e9793d3f242b

SHA512
7ec85215e75266a0616686d25bef4793130f315c83f4a3917748102384f3cf5570966def30e69b31ea8dba25c386dd9df2a52eab478e0c7d84b1e66df8a9a4e1

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

Filesize
683KB

MD5
a8b9706ed1ca326d4673b88fed84db23

SHA1
72fb18cdcd67d83fe1484b8ff93ba477e8082f7d

SHA256
bfc55cb35294fba322924cd2fe7ab9e79875b2cca66419ee5ef6d675b895349c

SHA512
89c5706bba41e6b25ad1f4431eba26df9145c2292f0c42c64c688851c1882004814bf4444f8013efc1504b4bb2bbb4d11896fec7c2e42088604eedadd28ebb9b

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

Filesize
683KB

MD5
a8b9706ed1ca326d4673b88fed84db23

SHA1
72fb18cdcd67d83fe1484b8ff93ba477e8082f7d

SHA256
bfc55cb35294fba322924cd2fe7ab9e79875b2cca66419ee5ef6d675b895349c

SHA512
89c5706bba41e6b25ad1f4431eba26df9145c2292f0c42c64c688851c1882004814bf4444f8013efc1504b4bb2bbb4d11896fec7c2e42088604eedadd28ebb9b

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

Filesize
683KB

MD5
a8b9706ed1ca326d4673b88fed84db23

SHA1
72fb18cdcd67d83fe1484b8ff93ba477e8082f7d

SHA256
bfc55cb35294fba322924cd2fe7ab9e79875b2cca66419ee5ef6d675b895349c

SHA512
89c5706bba41e6b25ad1f4431eba26df9145c2292f0c42c64c688851c1882004814bf4444f8013efc1504b4bb2bbb4d11896fec7c2e42088604eedadd28ebb9b

Download Submit
memory/568-69-0x0000000000000000-mapping.dmp

Download
memory/672-67-0x0000000000000000-mapping.dmp

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memory/744-71-0x0000000000000000-mapping.dmp

Download
memory/868-55-0x0000000076421000-0x0000000076423000-memory.dmp

Filesize
8KB

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memory/868-54-0x0000000001030000-0x00000000010E0000-memory.dmp

Filesize
704KB

Download
memory/888-74-0x00000000010F0000-0x00000000011A0000-memory.dmp

Filesize
704KB

Download
memory/888-73-0x0000000000000000-mapping.dmp

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memory/1116-56-0x0000000000000000-mapping.dmp

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memory/1212-72-0x0000000000000000-mapping.dmp

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memory/1380-68-0x0000000000000000-mapping.dmp

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memory/1688-66-0x0000000000000000-mapping.dmp

Download
memory/1772-65-0x000000006EC20000-0x000000006F1CB000-memory.dmp

Filesize
5.7MB

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memory/1772-61-0x0000000000000000-mapping.dmp

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memory/2028-58-0x0000000000000000-mapping.dmp

Download
memory/2028-62-0x0000000000840000-0x00000000008F0000-memory.dmp

Filesize
704KB

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