quasar | af1d446bb3abc47b5eacb7a00ebb1992be1c464cac5b0e4283b12f0500c3ad4e

General

Target

17e6bffaff1ea223913deb1bc78e74ae.exe
Size

534KB
MD5

17e6bffaff1ea223913deb1bc78e74ae
SHA1

67daf17f3c8f6d2169b24f9a3698921991bbba2f
SHA256

af1d446bb3abc47b5eacb7a00ebb1992be1c464cac5b0e4283b12f0500c3ad4e
SHA512

72086bdd67ce5c778a625d37d7069200747b70193742afee986ec3d58b3a4a5c95b206c91997faf5d3e46e7ab379955db5f033a8b10a4a4899ff6e6068c60ab6
SSDEEP

6144:l8fGABIgrx8kFYLTiMkbMaOcXL/Tb88ASigvCcD+6cfsfiTDpxUKl3Gy3V8/GV0S:EPx7FYPiMNA/flvCcqTsfGpxLl+u

Score

10^/10

quasar venomrat asdf evasion rat rootkit spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

asdf

C2

checkme12.freeddns.org:1604

Mutex

VNM_MUTEX_yidaALoSEROfTPWHwX

Attributes

encryption_key
TbfVFQWqb0uiZoBjJ9E9
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Venom Client Startup
subdirectory
UPX

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.

Processes:

resource	yara_rule
behavioral2/memory/4928-132-0x0000000000260000-0x00000000002EC000-memory.dmp	disable_win_def
C:\Users\Admin\AppData\Roaming\UPX\Client.exe	disable_win_def
C:\Users\Admin\AppData\Roaming\UPX\Client.exe	disable_win_def

Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs

evasion trojan

Modify Registry

T1112

Modify Existing Service

T1031

Disabling Security Tools

T1089

Processes:

17e6bffaff1ea223913deb1bc78e74ae.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection	17e6bffaff1ea223913deb1bc78e74ae.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	17e6bffaff1ea223913deb1bc78e74ae.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	17e6bffaff1ea223913deb1bc78e74ae.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	17e6bffaff1ea223913deb1bc78e74ae.exe

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 3 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4928-132-0x0000000000260000-0x00000000002EC000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\UPX\Client.exe	family_quasar
C:\Users\Admin\AppData\Roaming\UPX\Client.exe	family_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

Processes:

Client.exe

pid process

3096 Client.exe

pid	process
3096	Client.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

17e6bffaff1ea223913deb1bc78e74ae.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\Control Panel\International\Geo\Nation	17e6bffaff1ea223913deb1bc78e74ae.exe

Windows security modification 2 TTPs 2 IoCs

evasion trojan

Disabling Security Tools

T1089

Modify Registry

T1112

Processes:

17e6bffaff1ea223913deb1bc78e74ae.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features	17e6bffaff1ea223913deb1bc78e74ae.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows Defender\Features\TamperProtection = "0"	17e6bffaff1ea223913deb1bc78e74ae.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

10 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

4488 schtasks.exe
4900 schtasks.exe
Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery
T1018

Processes:

PING.EXE

pid process

1464 PING.EXE

flow	ioc
10	ip-api.com

pid	process
4488	schtasks.exe
4900	schtasks.exe

pid	process
1464	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

powershell.exe17e6bffaff1ea223913deb1bc78e74ae.exe17e6bffaff1ea223913deb1bc78e74ae.exe

pid	process
2872	powershell.exe
2872	powershell.exe
4928	17e6bffaff1ea223913deb1bc78e74ae.exe
4928	17e6bffaff1ea223913deb1bc78e74ae.exe
4928	17e6bffaff1ea223913deb1bc78e74ae.exe
4928	17e6bffaff1ea223913deb1bc78e74ae.exe
4928	17e6bffaff1ea223913deb1bc78e74ae.exe
4928	17e6bffaff1ea223913deb1bc78e74ae.exe
4928	17e6bffaff1ea223913deb1bc78e74ae.exe
4860	17e6bffaff1ea223913deb1bc78e74ae.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

17e6bffaff1ea223913deb1bc78e74ae.exepowershell.exeClient.exe17e6bffaff1ea223913deb1bc78e74ae.exe

description	pid	process
Token: SeDebugPrivilege	4928	17e6bffaff1ea223913deb1bc78e74ae.exe
Token: SeDebugPrivilege	2872	powershell.exe
Token: SeDebugPrivilege	3096	Client.exe
Token: SeDebugPrivilege	3096	Client.exe
Token: SeDebugPrivilege	4860	17e6bffaff1ea223913deb1bc78e74ae.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Client.exe

pid process

3096 Client.exe

pid	process
3096	Client.exe

Suspicious use of WriteProcessMemory 30 IoCs

Processes:

17e6bffaff1ea223913deb1bc78e74ae.exeClient.execmd.execmd.exe

description	pid	process	target process
PID 4928 wrote to memory of 4488	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	schtasks.exe
PID 4928 wrote to memory of 4488	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	schtasks.exe
PID 4928 wrote to memory of 4488	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	schtasks.exe
PID 4928 wrote to memory of 3096	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	Client.exe
PID 4928 wrote to memory of 3096	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	Client.exe
PID 4928 wrote to memory of 3096	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	Client.exe
PID 4928 wrote to memory of 2872	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	powershell.exe
PID 4928 wrote to memory of 2872	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	powershell.exe
PID 4928 wrote to memory of 2872	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	powershell.exe
PID 3096 wrote to memory of 4900	3096	Client.exe	schtasks.exe
PID 3096 wrote to memory of 4900	3096	Client.exe	schtasks.exe
PID 3096 wrote to memory of 4900	3096	Client.exe	schtasks.exe
PID 4928 wrote to memory of 4504	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	cmd.exe
PID 4928 wrote to memory of 4504	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	cmd.exe
PID 4928 wrote to memory of 4504	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	cmd.exe
PID 4504 wrote to memory of 1516	4504	cmd.exe	cmd.exe
PID 4504 wrote to memory of 1516	4504	cmd.exe	cmd.exe
PID 4504 wrote to memory of 1516	4504	cmd.exe	cmd.exe
PID 4928 wrote to memory of 3272	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	cmd.exe
PID 4928 wrote to memory of 3272	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	cmd.exe
PID 4928 wrote to memory of 3272	4928	17e6bffaff1ea223913deb1bc78e74ae.exe	cmd.exe
PID 3272 wrote to memory of 384	3272	cmd.exe	chcp.com
PID 3272 wrote to memory of 384	3272	cmd.exe	chcp.com
PID 3272 wrote to memory of 384	3272	cmd.exe	chcp.com
PID 3272 wrote to memory of 1464	3272	cmd.exe	PING.EXE
PID 3272 wrote to memory of 1464	3272	cmd.exe	PING.EXE
PID 3272 wrote to memory of 1464	3272	cmd.exe	PING.EXE
PID 3272 wrote to memory of 4860	3272	cmd.exe	17e6bffaff1ea223913deb1bc78e74ae.exe
PID 3272 wrote to memory of 4860	3272	cmd.exe	17e6bffaff1ea223913deb1bc78e74ae.exe
PID 3272 wrote to memory of 4860	3272	cmd.exe	17e6bffaff1ea223913deb1bc78e74ae.exe

C:\Users\Admin\AppData\Local\Temp\17e6bffaff1ea223913deb1bc78e74ae.exe
"C:\Users\Admin\AppData\Local\Temp\17e6bffaff1ea223913deb1bc78e74ae.exe"
1⤵
- Modifies Windows Defender Real-time Protection settings
- Checks computer location settings
- Windows security modification
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4928
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks" /create /tn "Venom Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\17e6bffaff1ea223913deb1bc78e74ae.exe" /rl HIGHEST /f
  2⤵
  - Creates scheduled task(s)
  PID:4488
- C:\Users\Admin\AppData\Roaming\UPX\Client.exe
  "C:\Users\Admin\AppData\Roaming\UPX\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:3096
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks" /create /tn "Venom Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\UPX\Client.exe" /rl HIGHEST /f
    3⤵
    - Creates scheduled task(s)
    PID:4900
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell" Get-MpPreference -verbose
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2872
- 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:4504
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
    3⤵
    PID:1516
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\79wvvXcR3PmB.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3272
- - C:\Windows\SysWOW64\chcp.com
    chcp 65001
    3⤵
    PID:384
- - C:\Windows\SysWOW64\PING.EXE
    ping -n 10 localhost
    3⤵
    - Runs ping.exe
    PID:1464
- - C:\Users\Admin\AppData\Local\Temp\17e6bffaff1ea223913deb1bc78e74ae.exe
    "C:\Users\Admin\AppData\Local\Temp\17e6bffaff1ea223913deb1bc78e74ae.exe"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4860

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Modify Existing Service

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Disabling Security Tools

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\17e6bffaff1ea223913deb1bc78e74ae.exe.log

Filesize
1KB

MD5
10eab9c2684febb5327b6976f2047587

SHA1
a12ed54146a7f5c4c580416aecb899549712449e

SHA256
f49dbd55029bfbc15134f7c6a4f967d6c39142c63f2e8f1f8c78fab108a2c928

SHA512
7e5fd90fffae723bd0c662a90e0730b507805f072771ee673d1d8c262dbf60c8a03ba5fe088f699a97c2e886380de158b2ccd59ee62e3d012dd6dd14ea9d0e50

Download Submit
C:\Users\Admin\AppData\Local\Temp\79wvvXcR3PmB.bat

Filesize
229B

MD5
5cff2ceddccffdc6c19200664127cff9

SHA1
89bbfde6856f16ea2c94d016b50c9db2d45c3e7a

SHA256
a12cd07d39c4dc618a382b97b5dd39c9d48bf167304986186a612616134350ee

SHA512
31a596d649c31595f50b5c84cd0c7265074d72e712158a515d158d11218bc6e4215a03d2486fb9e2f1914f00dc5c2772fc4b1f97dda0fb2222a411c675d0a0b2

Download Submit
C:\Users\Admin\AppData\Roaming\UPX\Client.exe

Filesize
534KB

MD5
17e6bffaff1ea223913deb1bc78e74ae

SHA1
67daf17f3c8f6d2169b24f9a3698921991bbba2f

SHA256
af1d446bb3abc47b5eacb7a00ebb1992be1c464cac5b0e4283b12f0500c3ad4e

SHA512
72086bdd67ce5c778a625d37d7069200747b70193742afee986ec3d58b3a4a5c95b206c91997faf5d3e46e7ab379955db5f033a8b10a4a4899ff6e6068c60ab6

Download Submit
C:\Users\Admin\AppData\Roaming\UPX\Client.exe

Filesize
534KB

MD5
17e6bffaff1ea223913deb1bc78e74ae

SHA1
67daf17f3c8f6d2169b24f9a3698921991bbba2f

SHA256
af1d446bb3abc47b5eacb7a00ebb1992be1c464cac5b0e4283b12f0500c3ad4e

SHA512
72086bdd67ce5c778a625d37d7069200747b70193742afee986ec3d58b3a4a5c95b206c91997faf5d3e46e7ab379955db5f033a8b10a4a4899ff6e6068c60ab6

Download Submit
memory/384-164-0x0000000000000000-mapping.dmp

Download
memory/1464-165-0x0000000000000000-mapping.dmp

Download
memory/1516-161-0x0000000000000000-mapping.dmp

Download
memory/2872-150-0x0000000006E50000-0x0000000006E82000-memory.dmp

Filesize
200KB

Download
memory/2872-154-0x0000000006F90000-0x0000000006FAA000-memory.dmp

Filesize
104KB

Download
memory/2872-159-0x00000000072B0000-0x00000000072B8000-memory.dmp

Filesize
32KB

Download
memory/2872-142-0x0000000000000000-mapping.dmp

Download
memory/2872-143-0x00000000022E0000-0x0000000002316000-memory.dmp

Filesize
216KB

Download
memory/2872-144-0x0000000004D80000-0x00000000053A8000-memory.dmp

Filesize
6.2MB

Download
memory/2872-145-0x0000000004D40000-0x0000000004D62000-memory.dmp

Filesize
136KB

Download
memory/2872-146-0x00000000054A0000-0x0000000005506000-memory.dmp

Filesize
408KB

Download
memory/2872-147-0x0000000005C90000-0x0000000005CAE000-memory.dmp

Filesize
120KB

Download
memory/2872-158-0x00000000072D0000-0x00000000072EA000-memory.dmp

Filesize
104KB

Download
memory/2872-157-0x00000000071C0000-0x00000000071CE000-memory.dmp

Filesize
56KB

Download
memory/2872-156-0x0000000007210000-0x00000000072A6000-memory.dmp

Filesize
600KB

Download
memory/2872-151-0x000000006FCE0000-0x000000006FD2C000-memory.dmp

Filesize
304KB

Download
memory/2872-152-0x0000000006240000-0x000000000625E000-memory.dmp

Filesize
120KB

Download
memory/2872-153-0x00000000075D0000-0x0000000007C4A000-memory.dmp

Filesize
6.5MB

Download
memory/2872-155-0x0000000007000000-0x000000000700A000-memory.dmp

Filesize
40KB

Download
memory/3096-149-0x00000000065A0000-0x00000000065AA000-memory.dmp

Filesize
40KB

Download
memory/3096-139-0x0000000000000000-mapping.dmp

Download
memory/3272-162-0x0000000000000000-mapping.dmp

Download
memory/4488-138-0x0000000000000000-mapping.dmp

Download
memory/4504-160-0x0000000000000000-mapping.dmp

Download
memory/4860-166-0x0000000000000000-mapping.dmp

Download
memory/4900-148-0x0000000000000000-mapping.dmp

Download
memory/4928-137-0x00000000060F0000-0x000000000612C000-memory.dmp

Filesize
240KB

Download
memory/4928-136-0x0000000005CC0000-0x0000000005CD2000-memory.dmp

Filesize
72KB

Download
memory/4928-135-0x0000000004E50000-0x0000000004EB6000-memory.dmp

Filesize
408KB

Download
memory/4928-134-0x0000000004D40000-0x0000000004DD2000-memory.dmp

Filesize
584KB

Download
memory/4928-132-0x0000000000260000-0x00000000002EC000-memory.dmp

Filesize
560KB

Download
memory/4928-133-0x00000000052F0000-0x0000000005894000-memory.dmp

Filesize
5.6MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads