quasar | defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19

Analysis

max time kernel
135s
max time network
143s
platform
windows10_x64
resource
win10-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 8 IoCs

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

resource	yara_rule
behavioral2/memory/3500-115-0x0000000000450000-0x00000000004F6000-memory.dmp	disable_win_def
behavioral2/memory/3500-116-0x0000000000450000-0x00000000004F6000-memory.dmp	disable_win_def
behavioral2/files/0x000500000001ab34-125.dat	disable_win_def
behavioral2/files/0x000500000001ab34-126.dat	disable_win_def
behavioral2/memory/4048-127-0x0000000000A20000-0x0000000000AC6000-memory.dmp	disable_win_def
behavioral2/memory/4048-129-0x0000000000A20000-0x0000000000AC6000-memory.dmp	disable_win_def
behavioral2/memory/1976-397-0x0000000000620000-0x00000000006C6000-memory.dmp	disable_win_def
behavioral2/memory/1976-398-0x0000000000620000-0x00000000006C6000-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 8 IoCs

resource	yara_rule
behavioral2/memory/3500-115-0x0000000000450000-0x00000000004F6000-memory.dmp	family_quasar
behavioral2/memory/3500-116-0x0000000000450000-0x00000000004F6000-memory.dmp	family_quasar
behavioral2/files/0x000500000001ab34-125.dat	family_quasar
behavioral2/files/0x000500000001ab34-126.dat	family_quasar
behavioral2/memory/4048-127-0x0000000000A20000-0x0000000000AC6000-memory.dmp	family_quasar
behavioral2/memory/4048-129-0x0000000000A20000-0x0000000000AC6000-memory.dmp	family_quasar
behavioral2/memory/1976-397-0x0000000000620000-0x00000000006C6000-memory.dmp	family_quasar
behavioral2/memory/1976-398-0x0000000000620000-0x00000000006C6000-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
4048	KRNL By IceBerg.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
8	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
4016	schtasks.exe
3292	schtasks.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2072	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
3192	powershell.exe
3192	powershell.exe
3192	powershell.exe
3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
1976	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
Token: SeDebugPrivilege	3192	powershell.exe
Token: SeDebugPrivilege	4048	KRNL By IceBerg.exe
Token: SeDebugPrivilege	4048	KRNL By IceBerg.exe
Token: SeDebugPrivilege	1976	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3500 wrote to memory of 4016	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	69
PID 3500 wrote to memory of 4016	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	69
PID 3500 wrote to memory of 4016	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	69
PID 3500 wrote to memory of 4048	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	71
PID 3500 wrote to memory of 4048	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	71
PID 3500 wrote to memory of 4048	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	71
PID 3500 wrote to memory of 3192	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	72
PID 3500 wrote to memory of 3192	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	72
PID 3500 wrote to memory of 3192	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	72
PID 4048 wrote to memory of 3292	4048	KRNL By IceBerg.exe	74
PID 4048 wrote to memory of 3292	4048	KRNL By IceBerg.exe	74
PID 4048 wrote to memory of 3292	4048	KRNL By IceBerg.exe	74
PID 3500 wrote to memory of 1100	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	76
PID 3500 wrote to memory of 1100	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	76
PID 3500 wrote to memory of 1100	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	76
PID 1100 wrote to memory of 2196	1100	cmd.exe	78
PID 1100 wrote to memory of 2196	1100	cmd.exe	78
PID 1100 wrote to memory of 2196	1100	cmd.exe	78
PID 3500 wrote to memory of 1472	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	79
PID 3500 wrote to memory of 1472	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	79
PID 3500 wrote to memory of 1472	3500	defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe	79
PID 1472 wrote to memory of 2308	1472	cmd.exe	81
PID 1472 wrote to memory of 2308	1472	cmd.exe	81
PID 1472 wrote to memory of 2308	1472	cmd.exe	81
PID 1472 wrote to memory of 2072	1472	cmd.exe	82
PID 1472 wrote to memory of 2072	1472	cmd.exe	82
PID 1472 wrote to memory of 2072	1472	cmd.exe	82
PID 1472 wrote to memory of 1976	1472	cmd.exe	83
PID 1472 wrote to memory of 1976	1472	cmd.exe	83
PID 1472 wrote to memory of 1976	1472	cmd.exe	83

C:\Users\Admin\AppData\Local\Temp\defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe
"C:\Users\Admin\AppData\Local\Temp\defbae45ea8e71f8a50123f382f4538afc9db836de09bab316464d4793394f19.exe"
1⤵
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3500
- 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:4016
- 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:4048
- - 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:3292
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3192
- 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:1100
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:2196
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\llPt1GVQb8ho.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1472
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:2308
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:2072
- - 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:1976

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

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/1976-397-0x0000000000620000-0x00000000006C6000-memory.dmp

Filesize
664KB

Download
memory/1976-398-0x0000000000620000-0x00000000006C6000-memory.dmp

Filesize
664KB

Download
memory/1976-399-0x0000000005510000-0x0000000005A0E000-memory.dmp

Filesize
5.0MB

Download
memory/1976-400-0x0000000005010000-0x00000000050A2000-memory.dmp

Filesize
584KB

Download
memory/1976-401-0x0000000004F90000-0x0000000004F91000-memory.dmp

Filesize
4KB

Download
memory/1976-402-0x00000000051B0000-0x0000000005216000-memory.dmp

Filesize
408KB

Download
memory/3192-373-0x00000000099C0000-0x00000000099DA000-memory.dmp

Filesize
104KB

Download
memory/3192-163-0x0000000007D30000-0x0000000007D96000-memory.dmp

Filesize
408KB

Download
memory/3192-133-0x0000000003220000-0x0000000003221000-memory.dmp

Filesize
4KB

Download
memory/3192-134-0x0000000004B30000-0x0000000004B66000-memory.dmp

Filesize
216KB

Download
memory/3192-136-0x0000000006FE0000-0x0000000006FE1000-memory.dmp

Filesize
4KB

Download
memory/3192-137-0x0000000006FE2000-0x0000000006FE3000-memory.dmp

Filesize
4KB

Download
memory/3192-138-0x0000000007620000-0x0000000007C48000-memory.dmp

Filesize
6.2MB

Download
memory/3192-139-0x0000000007580000-0x00000000075A2000-memory.dmp

Filesize
136KB

Download
memory/3192-140-0x0000000007C50000-0x0000000007CB6000-memory.dmp

Filesize
408KB

Download
memory/3192-141-0x0000000007D30000-0x0000000007D96000-memory.dmp

Filesize
408KB

Download
memory/3192-142-0x0000000007F80000-0x00000000082D0000-memory.dmp

Filesize
3.3MB

Download
memory/3192-144-0x0000000008390000-0x00000000083DB000-memory.dmp

Filesize
300KB

Download
memory/3192-143-0x0000000007DD0000-0x0000000007DEC000-memory.dmp

Filesize
112KB

Download
memory/3192-379-0x00000000099B0000-0x00000000099B8000-memory.dmp

Filesize
32KB

Download
memory/3192-374-0x00000000099B0000-0x00000000099B8000-memory.dmp

Filesize
32KB

Download
memory/3192-147-0x00000000086D0000-0x0000000008746000-memory.dmp

Filesize
472KB

Download
memory/3192-368-0x00000000099C0000-0x00000000099DA000-memory.dmp

Filesize
104KB

Download
memory/3192-175-0x0000000006FE3000-0x0000000006FE4000-memory.dmp

Filesize
4KB

Download
memory/3192-150-0x0000000003220000-0x0000000003221000-memory.dmp

Filesize
4KB

Download
memory/3192-158-0x0000000007620000-0x0000000007C48000-memory.dmp

Filesize
6.2MB

Download
memory/3192-159-0x0000000009500000-0x0000000009533000-memory.dmp

Filesize
204KB

Download
memory/3192-160-0x0000000009500000-0x0000000009533000-memory.dmp

Filesize
204KB

Download
memory/3192-161-0x0000000007580000-0x00000000075A2000-memory.dmp

Filesize
136KB

Download
memory/3192-162-0x0000000007C50000-0x0000000007CB6000-memory.dmp

Filesize
408KB

Download
memory/3192-132-0x0000000003220000-0x0000000003221000-memory.dmp

Filesize
4KB

Download
memory/3192-165-0x00000000086D0000-0x0000000008746000-memory.dmp

Filesize
472KB

Download
memory/3192-164-0x0000000008390000-0x00000000083DB000-memory.dmp

Filesize
300KB

Download
memory/3192-166-0x00000000094E0000-0x00000000094FE000-memory.dmp

Filesize
120KB

Download
memory/3192-174-0x000000007E990000-0x000000007E991000-memory.dmp

Filesize
4KB

Download
memory/3192-172-0x0000000009640000-0x00000000096E5000-memory.dmp

Filesize
660KB

Download
memory/3192-173-0x0000000009A10000-0x0000000009AA4000-memory.dmp

Filesize
592KB

Download
memory/3500-116-0x0000000000450000-0x00000000004F6000-memory.dmp

Filesize
664KB

Download
memory/3500-115-0x0000000000450000-0x00000000004F6000-memory.dmp

Filesize
664KB

Download
memory/3500-117-0x00000000051C0000-0x00000000056BE000-memory.dmp

Filesize
5.0MB

Download
memory/3500-118-0x0000000004DF0000-0x0000000004E82000-memory.dmp

Filesize
584KB

Download
memory/3500-119-0x0000000004CC0000-0x00000000051BE000-memory.dmp

Filesize
5.0MB

Download
memory/3500-120-0x00000000056C0000-0x0000000005726000-memory.dmp

Filesize
408KB

Download
memory/3500-121-0x0000000005CB0000-0x0000000005CC2000-memory.dmp

Filesize
72KB

Download
memory/3500-122-0x00000000060A0000-0x00000000060DE000-memory.dmp

Filesize
248KB

Download
memory/4048-145-0x0000000005570000-0x00000000055D6000-memory.dmp

Filesize
408KB

Download
memory/4048-127-0x0000000000A20000-0x0000000000AC6000-memory.dmp

Filesize
664KB

Download
memory/4048-135-0x0000000002C80000-0x0000000002C81000-memory.dmp

Filesize
4KB

Download
memory/4048-129-0x0000000000A20000-0x0000000000AC6000-memory.dmp

Filesize
664KB

Download
memory/4048-130-0x0000000005830000-0x0000000005D2E000-memory.dmp

Filesize
5.0MB

Download
memory/4048-131-0x00000000053D0000-0x0000000005462000-memory.dmp

Filesize
584KB

Download
memory/4048-169-0x0000000006760000-0x000000000676A000-memory.dmp

Filesize
40KB

Download
memory/4048-146-0x00000000053B0000-0x00000000053C2000-memory.dmp

Filesize
72KB

Download
memory/4048-148-0x00000000065C0000-0x00000000065FE000-memory.dmp

Filesize
248KB

Download