quasar | defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19

Analysis

max time kernel
137s
max time network
149s
platform
windows7_x64
resource
win7-en-20211208
submitted
07/01/2022, 10:21

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General

Target

defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
Size

637KB
MD5

3ae1b43ae183a646db68834676be741c
SHA1

e50bb029949247457a6c9faa31e38f1fb9dfd6ae
SHA256

defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19
SHA512

eb4f887d7e73f8130ae6d2f7cf27e6921a304b4a94ca50e2e747b7f057dd7d3e882556edf27dd1fdb625d0b74afc7d000702a034f258609ded97cd7940abfe70

Score

10^/10

quasar venomrat krnl evasion rat rootkit spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

KRNL

127.0.0.1:4782

quadrad.duckdns.org:1604

Mutex

VNM_MUTEX_w5oFkfEj8KXNrXmElF

Attributes

encryption_key
HNAC3wR1K0TyDxzlsLfi
install_name
KRNL By IceBerg.exe
log_directory
Logs
reconnect_delay
100
startup_key
KRNL By IceBerg
subdirectory
Boostrapper

Signatures

Contains code to disable Windows Defender 9 IoCs

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

resource	yara_rule
behavioral1/memory/1772-54-0x0000000001360000-0x0000000001406000-memory.dmp	disable_win_def
behavioral1/memory/1772-55-0x0000000001360000-0x0000000001406000-memory.dmp	disable_win_def
behavioral1/files/0x00080000000121f5-59.dat	disable_win_def
behavioral1/files/0x00080000000121f5-61.dat	disable_win_def
behavioral1/files/0x00080000000121f5-62.dat	disable_win_def
behavioral1/memory/828-63-0x0000000000870000-0x0000000000916000-memory.dmp	disable_win_def
behavioral1/memory/828-64-0x0000000000870000-0x0000000000916000-memory.dmp	disable_win_def
behavioral1/memory/1512-81-0x0000000001360000-0x0000000001406000-memory.dmp	disable_win_def
behavioral1/memory/1512-80-0x0000000001360000-0x0000000001406000-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 9 IoCs

resource	yara_rule
behavioral1/memory/1772-54-0x0000000001360000-0x0000000001406000-memory.dmp	family_quasar
behavioral1/memory/1772-55-0x0000000001360000-0x0000000001406000-memory.dmp	family_quasar
behavioral1/files/0x00080000000121f5-59.dat	family_quasar
behavioral1/files/0x00080000000121f5-61.dat	family_quasar
behavioral1/files/0x00080000000121f5-62.dat	family_quasar
behavioral1/memory/828-63-0x0000000000870000-0x0000000000916000-memory.dmp	family_quasar
behavioral1/memory/828-64-0x0000000000870000-0x0000000000916000-memory.dmp	family_quasar
behavioral1/memory/1512-81-0x0000000001360000-0x0000000001406000-memory.dmp	family_quasar
behavioral1/memory/1512-80-0x0000000001360000-0x0000000001406000-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

Executes dropped EXE 1 IoCs

pid	Process
828	KRNL By IceBerg.exe

Loads dropped DLL 1 IoCs

pid	Process
1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.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	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.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
1428	schtasks.exe
992	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	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\A8985D3A65E5E5C4B2D7D66D40C6DD2FB19C5436\Blob = 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	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
912	PING.EXE

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1980	powershell.exe
1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
1512	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
Token: SeDebugPrivilege	828	KRNL By IceBerg.exe
Token: SeDebugPrivilege	828	KRNL By IceBerg.exe
Token: SeDebugPrivilege	1980	powershell.exe
Token: SeDebugPrivilege	1512	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe

Suspicious use of WriteProcessMemory 40 IoCs

description	pid	Process	procid_target
PID 1772 wrote to memory of 1428	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	28
PID 1772 wrote to memory of 1428	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	28
PID 1772 wrote to memory of 1428	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	28
PID 1772 wrote to memory of 1428	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	28
PID 1772 wrote to memory of 828	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	30
PID 1772 wrote to memory of 828	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	30
PID 1772 wrote to memory of 828	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	30
PID 1772 wrote to memory of 828	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	30
PID 1772 wrote to memory of 1980	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	31
PID 1772 wrote to memory of 1980	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	31
PID 1772 wrote to memory of 1980	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	31
PID 1772 wrote to memory of 1980	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	31
PID 828 wrote to memory of 992	828	KRNL By IceBerg.exe	33
PID 828 wrote to memory of 992	828	KRNL By IceBerg.exe	33
PID 828 wrote to memory of 992	828	KRNL By IceBerg.exe	33
PID 828 wrote to memory of 992	828	KRNL By IceBerg.exe	33
PID 1772 wrote to memory of 1948	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	35
PID 1772 wrote to memory of 1948	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	35
PID 1772 wrote to memory of 1948	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	35
PID 1772 wrote to memory of 1948	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	35
PID 1948 wrote to memory of 2012	1948	cmd.exe	37
PID 1948 wrote to memory of 2012	1948	cmd.exe	37
PID 1948 wrote to memory of 2012	1948	cmd.exe	37
PID 1948 wrote to memory of 2012	1948	cmd.exe	37
PID 1772 wrote to memory of 1760	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	38
PID 1772 wrote to memory of 1760	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	38
PID 1772 wrote to memory of 1760	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	38
PID 1772 wrote to memory of 1760	1772	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	38
PID 1760 wrote to memory of 1256	1760	cmd.exe	40
PID 1760 wrote to memory of 1256	1760	cmd.exe	40
PID 1760 wrote to memory of 1256	1760	cmd.exe	40
PID 1760 wrote to memory of 1256	1760	cmd.exe	40
PID 1760 wrote to memory of 912	1760	cmd.exe	41
PID 1760 wrote to memory of 912	1760	cmd.exe	41
PID 1760 wrote to memory of 912	1760	cmd.exe	41
PID 1760 wrote to memory of 912	1760	cmd.exe	41
PID 1760 wrote to memory of 1512	1760	cmd.exe	42
PID 1760 wrote to memory of 1512	1760	cmd.exe	42
PID 1760 wrote to memory of 1512	1760	cmd.exe	42
PID 1760 wrote to memory of 1512	1760	cmd.exe	42

C:\Users\Admin\AppData\Local\Temp\defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
"C:\Users\Admin\AppData\Local\Temp\defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe"
1⤵
- Loads dropped DLL
- Windows security modification
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1772
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "KRNL By IceBerg" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:1428
- C:\Users\Admin\AppData\Roaming\Boostrapper\KRNL By IceBerg.exe
  "C:\Users\Admin\AppData\Roaming\Boostrapper\KRNL By IceBerg.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:828
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "KRNL By IceBerg" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Boostrapper\KRNL By IceBerg.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:992
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1980
- 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:1948
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:2012
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\SM0n3rZOHDNj.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1760
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:1256
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:912
- - C:\Users\Admin\AppData\Local\Temp\defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
    "C:\Users\Admin\AppData\Local\Temp\defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1512

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/828-68-0x00000000047E0000-0x00000000047E1000-memory.dmp

Filesize
4KB

Download
memory/828-63-0x0000000000870000-0x0000000000916000-memory.dmp

Filesize
664KB

Download
memory/828-64-0x0000000000870000-0x0000000000916000-memory.dmp

Filesize
664KB

Download
memory/1512-83-0x0000000004BD0000-0x0000000004BD1000-memory.dmp

Filesize
4KB

Download
memory/1512-80-0x0000000001360000-0x0000000001406000-memory.dmp

Filesize
664KB

Download
memory/1512-81-0x0000000001360000-0x0000000001406000-memory.dmp

Filesize
664KB

Download
memory/1772-56-0x00000000762C1000-0x00000000762C3000-memory.dmp

Filesize
8KB

Download
memory/1772-54-0x0000000001360000-0x0000000001406000-memory.dmp

Filesize
664KB

Download
memory/1772-57-0x0000000004BD0000-0x0000000004BD1000-memory.dmp

Filesize
4KB

Download
memory/1772-55-0x0000000001360000-0x0000000001406000-memory.dmp

Filesize
664KB

Download
memory/1980-72-0x0000000002322000-0x0000000002324000-memory.dmp

Filesize
8KB

Download
memory/1980-71-0x0000000002321000-0x0000000002322000-memory.dmp

Filesize
4KB

Download
memory/1980-70-0x0000000002320000-0x0000000002321000-memory.dmp

Filesize
4KB

Download