quasar | 08fb091d9d284795239c1ffd5f06f339b8b6db726198f5325f4ae55c77199402

Analysis

max time kernel
141s
max time network
168s
platform
windows7_x64
resource
win7-20220414-en
submitted
03/05/2022, 20:03

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General

Target

Rusher Hack/Data/Installer.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 6 IoCs

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

resource	yara_rule
behavioral1/memory/1864-54-0x00000000002D0000-0x0000000000380000-memory.dmp	disable_win_def
behavioral1/files/0x00080000000144ad-57.dat	disable_win_def
behavioral1/files/0x00080000000144ad-59.dat	disable_win_def
behavioral1/files/0x00080000000144ad-60.dat	disable_win_def
behavioral1/memory/1948-61-0x0000000000EE0000-0x0000000000F90000-memory.dmp	disable_win_def
behavioral1/memory/1276-74-0x0000000000830000-0x00000000008E0000-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

resource	yara_rule
behavioral1/memory/1864-54-0x00000000002D0000-0x0000000000380000-memory.dmp	family_quasar
behavioral1/files/0x00080000000144ad-57.dat	family_quasar
behavioral1/files/0x00080000000144ad-59.dat	family_quasar
behavioral1/files/0x00080000000144ad-60.dat	family_quasar
behavioral1/memory/1948-61-0x0000000000EE0000-0x0000000000F90000-memory.dmp	family_quasar
behavioral1/memory/1276-74-0x0000000000830000-0x00000000008E0000-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
suricata: ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 3
suricata: ET MALWARE W32/Quasar 1.3/Venom RAT Connectivity Check 3
suricata

Executes dropped EXE 1 IoCs

pid	Process
1948	windowsrc.exe

Loads dropped DLL 1 IoCs

pid	Process
1864	Installer.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	Installer.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	Installer.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

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\\Local\\Temp\\Rusher Hack\\Data\\Installer.exe\""	Installer.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.

flow	ioc
1	ip-api.com
5	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

pid	Process
776	schtasks.exe
1964	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	Installer.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	Installer.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1052	PING.EXE

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1692	powershell.exe
1864	Installer.exe
1864	Installer.exe
1864	Installer.exe
1864	Installer.exe
1864	Installer.exe
1864	Installer.exe
1864	Installer.exe
1276	Installer.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1864	Installer.exe
Token: SeDebugPrivilege	1948	windowsrc.exe
Token: SeDebugPrivilege	1948	windowsrc.exe
Token: SeDebugPrivilege	1692	powershell.exe
Token: SeDebugPrivilege	1276	Installer.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1948	windowsrc.exe

Suspicious use of WriteProcessMemory 43 IoCs

description	pid	Process	procid_target
PID 1864 wrote to memory of 776	1864	Installer.exe	28
PID 1864 wrote to memory of 776	1864	Installer.exe	28
PID 1864 wrote to memory of 776	1864	Installer.exe	28
PID 1864 wrote to memory of 776	1864	Installer.exe	28
PID 1864 wrote to memory of 1948	1864	Installer.exe	30
PID 1864 wrote to memory of 1948	1864	Installer.exe	30
PID 1864 wrote to memory of 1948	1864	Installer.exe	30
PID 1864 wrote to memory of 1948	1864	Installer.exe	30
PID 1864 wrote to memory of 1692	1864	Installer.exe	31
PID 1864 wrote to memory of 1692	1864	Installer.exe	31
PID 1864 wrote to memory of 1692	1864	Installer.exe	31
PID 1864 wrote to memory of 1692	1864	Installer.exe	31
PID 1948 wrote to memory of 1964	1948	windowsrc.exe	33
PID 1948 wrote to memory of 1964	1948	windowsrc.exe	33
PID 1948 wrote to memory of 1964	1948	windowsrc.exe	33
PID 1948 wrote to memory of 1964	1948	windowsrc.exe	33
PID 1864 wrote to memory of 1772	1864	Installer.exe	35
PID 1864 wrote to memory of 1772	1864	Installer.exe	35
PID 1864 wrote to memory of 1772	1864	Installer.exe	35
PID 1864 wrote to memory of 1772	1864	Installer.exe	35
PID 1772 wrote to memory of 1288	1772	cmd.exe	37
PID 1772 wrote to memory of 1288	1772	cmd.exe	37
PID 1772 wrote to memory of 1288	1772	cmd.exe	37
PID 1772 wrote to memory of 1288	1772	cmd.exe	37
PID 1864 wrote to memory of 1172	1864	Installer.exe	38
PID 1864 wrote to memory of 1172	1864	Installer.exe	38
PID 1864 wrote to memory of 1172	1864	Installer.exe	38
PID 1864 wrote to memory of 1172	1864	Installer.exe	38
PID 1172 wrote to memory of 1636	1172	cmd.exe	40
PID 1172 wrote to memory of 1636	1172	cmd.exe	40
PID 1172 wrote to memory of 1636	1172	cmd.exe	40
PID 1172 wrote to memory of 1636	1172	cmd.exe	40
PID 1172 wrote to memory of 1052	1172	cmd.exe	41
PID 1172 wrote to memory of 1052	1172	cmd.exe	41
PID 1172 wrote to memory of 1052	1172	cmd.exe	41
PID 1172 wrote to memory of 1052	1172	cmd.exe	41
PID 1172 wrote to memory of 1276	1172	cmd.exe	42
PID 1172 wrote to memory of 1276	1172	cmd.exe	42
PID 1172 wrote to memory of 1276	1172	cmd.exe	42
PID 1172 wrote to memory of 1276	1172	cmd.exe	42
PID 1172 wrote to memory of 1276	1172	cmd.exe	42
PID 1172 wrote to memory of 1276	1172	cmd.exe	42
PID 1172 wrote to memory of 1276	1172	cmd.exe	42

C:\Users\Admin\AppData\Local\Temp\Rusher Hack\Data\Installer.exe
"C:\Users\Admin\AppData\Local\Temp\Rusher Hack\Data\Installer.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:1864
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Windows Registry Handler" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Rusher Hack\Data\Installer.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:776
- 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:1948
- - 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:1964
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1692
- 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:1772
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:1288
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\MrCL47UO3F2n.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1172
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:1636
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:1052
- - C:\Users\Admin\AppData\Local\Temp\Rusher Hack\Data\Installer.exe
    "C:\Users\Admin\AppData\Local\Temp\Rusher Hack\Data\Installer.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1276

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\MrCL47UO3F2n.bat

Filesize
223B

MD5
4fd88a341b9e54cb66607424a51e68dd

SHA1
b9bbaa1f3cbd4aab286f2af14897de55141b8802

SHA256
a741b0b727f0a3e53a2a0a9311c331927de4db406090ed62ddcaa105babb3ac0

SHA512
e2a7193dba40b51d27403df595c24dc1d144954a9fbd41890425203646fa32318a7b1a459e9670b6f92ae0fbea9e9b8092a4dbdae64da1a5bc754fe31cbc0c81

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/1276-74-0x0000000000830000-0x00000000008E0000-memory.dmp

Filesize
704KB

Download
memory/1692-66-0x000000006E740000-0x000000006ECEB000-memory.dmp

Filesize
5.7MB

Download
memory/1864-54-0x00000000002D0000-0x0000000000380000-memory.dmp

Filesize
704KB

Download
memory/1864-55-0x0000000075A61000-0x0000000075A63000-memory.dmp

Filesize
8KB

Download
memory/1948-61-0x0000000000EE0000-0x0000000000F90000-memory.dmp

Filesize
704KB

Download