quasar | 54e33e90fc6174e079fbb5d00abd7f3d2c8ad9bcc8c67910f3c21e4f31282aa0

Reason

Machine shutdown

General

Target

a6750a74736787e997cea380247a97f2_JaffaCakes118.exe
Size

485KB
MD5

a6750a74736787e997cea380247a97f2
SHA1

7d25daa8359e023f8bb3bdb4c4fa77c2eeb19195
SHA256

54e33e90fc6174e079fbb5d00abd7f3d2c8ad9bcc8c67910f3c21e4f31282aa0
SHA512

6d029e775fb53e086c4f97a4594c919c976a49a58ecd1495d7c007206c3ef01a7b4c650a792734b17ee291c68bb96bd1175d9d40e3c1226318bc8bffc7185b23
SSDEEP

12288:DVm5YyKReiCZp4o2ylxSyx9F7TPeBfoZ/mi:J8Yeimeyrr1elos

Score

10^/10

quasar venomrat svhost rat rootkit spyware stealer trojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

svhost

C2

myconect.ddns.net:6606

Mutex

VNM_MUTEX_ND6PULLW5ZVLwo1nwR

Attributes

encryption_key
yaa63tXY4j55os5llHHd
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Venom Client Startup
subdirectory
SubDir

Signatures

Contains code to disable Windows Defender 2 IoCs

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

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\$77-Venom.exe	disable_win_def
behavioral2/memory/732-18-0x0000000000DF0000-0x0000000000E7C000-memory.dmp	disable_win_def

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\$77-Venom.exe	family_quasar
behavioral2/memory/732-18-0x0000000000DF0000-0x0000000000E7C000-memory.dmp	family_quasar

VenomRAT
VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.
rat rootkit stealer venomrat

Checks computer location settings 2 TTPs 2 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

Processes:

a6750a74736787e997cea380247a97f2_JaffaCakes118.exe$77-Venom.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	a6750a74736787e997cea380247a97f2_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4124900551-4068476067-3491212533-1000\Control Panel\International\Geo\Nation	$77-Venom.exe

Executes dropped EXE 1 IoCs

Processes:

$77-Venom.exe

pid process

732 $77-Venom.exe

pid	process
732	$77-Venom.exe

Drops desktop.ini file(s) 2 IoCs

Processes:

a6750a74736787e997cea380247a97f2_JaffaCakes118.exe

description	ioc	process
File created	C:\Windows\assembly\Desktop.ini	a6750a74736787e997cea380247a97f2_JaffaCakes118.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	a6750a74736787e997cea380247a97f2_JaffaCakes118.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.

Processes:

flow ioc

9 api.ipify.org
2 ip-api.com

flow	ioc
9	api.ipify.org
2	ip-api.com

Drops file in Windows directory 3 IoCs

Processes:

a6750a74736787e997cea380247a97f2_JaffaCakes118.exe

description	ioc	process
File opened for modification	C:\Windows\assembly	a6750a74736787e997cea380247a97f2_JaffaCakes118.exe
File created	C:\Windows\assembly\Desktop.ini	a6750a74736787e997cea380247a97f2_JaffaCakes118.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	a6750a74736787e997cea380247a97f2_JaffaCakes118.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

Processes:

dw20.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

T1012

System Information Discovery

T1082

Processes:

dw20.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

dw20.exe$77-Venom.exe

description	pid	process
Token: SeRestorePrivilege	5112	dw20.exe
Token: SeBackupPrivilege	5112	dw20.exe
Token: SeBackupPrivilege	5112	dw20.exe
Token: SeBackupPrivilege	5112	dw20.exe
Token: SeDebugPrivilege	732	$77-Venom.exe
Token: SeDebugPrivilege	732	$77-Venom.exe

Suspicious use of WriteProcessMemory 9 IoCs

Processes:

a6750a74736787e997cea380247a97f2_JaffaCakes118.exe$77-Venom.exe

description	pid	process	target process
PID 3688 wrote to memory of 732	3688	a6750a74736787e997cea380247a97f2_JaffaCakes118.exe	$77-Venom.exe
PID 3688 wrote to memory of 732	3688	a6750a74736787e997cea380247a97f2_JaffaCakes118.exe	$77-Venom.exe
PID 3688 wrote to memory of 732	3688	a6750a74736787e997cea380247a97f2_JaffaCakes118.exe	$77-Venom.exe
PID 3688 wrote to memory of 5112	3688	a6750a74736787e997cea380247a97f2_JaffaCakes118.exe	dw20.exe
PID 3688 wrote to memory of 5112	3688	a6750a74736787e997cea380247a97f2_JaffaCakes118.exe	dw20.exe
PID 3688 wrote to memory of 5112	3688	a6750a74736787e997cea380247a97f2_JaffaCakes118.exe	dw20.exe
PID 732 wrote to memory of 792	732	$77-Venom.exe	cmd.exe
PID 732 wrote to memory of 792	732	$77-Venom.exe	cmd.exe
PID 732 wrote to memory of 792	732	$77-Venom.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\a6750a74736787e997cea380247a97f2_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\a6750a74736787e997cea380247a97f2_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Drops desktop.ini file(s)
- Drops file in Windows directory
- Suspicious use of WriteProcessMemory
PID:3688
- C:\Users\Admin\AppData\Roaming\$77-Venom.exe
  "C:\Users\Admin\AppData\Roaming\$77-Venom.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:732
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\Bjvwa1IgnHZE.bat" "
    3⤵
    PID:792
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
  dw20.exe -x -s 1528
  2⤵
  - Checks processor information in registry
  - Enumerates system info in registry
  - Suspicious use of AdjustPrivilegeToken
  PID:5112

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

3

T1012

System Information Discovery

4

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\$77-Venom.exe

Filesize
534KB

MD5
84c1dc6b428904cc2a6746653849df0f

SHA1
5cce4078427481f4d7456b5a4f3930ae6e706fb4

SHA256
bc24e3c5408fea0b6f9aa0deb56a4636a8d0b9a6054ff1033efa6ccfe04ba44a

SHA512
3b7a7607c3409b5ded563f2e1fcc0fa489c4465ab764d14a647b474968a025a95fa8ceb549fc70482b7b1dd935f66a41ada7b4910059786aafc870c5847a9245

Download Submit
memory/732-19-0x0000000005E00000-0x00000000063A4000-memory.dmp

Filesize
5.6MB

Download
memory/732-17-0x00000000720DE000-0x00000000720DF000-memory.dmp

Filesize
4KB

Download
memory/732-18-0x0000000000DF0000-0x0000000000E7C000-memory.dmp

Filesize
560KB

Download
memory/732-20-0x0000000005730000-0x00000000057C2000-memory.dmp

Filesize
584KB

Download
memory/732-25-0x00000000720D0000-0x0000000072880000-memory.dmp

Filesize
7.7MB

Download
memory/732-29-0x00000000058C0000-0x0000000005926000-memory.dmp

Filesize
408KB

Download
memory/732-30-0x0000000005DB0000-0x0000000005DC2000-memory.dmp

Filesize
72KB

Download
memory/732-31-0x00000000720DE000-0x00000000720DF000-memory.dmp

Filesize
4KB

Download
memory/732-32-0x00000000720D0000-0x0000000072880000-memory.dmp

Filesize
7.7MB

Download
memory/3688-2-0x0000000075050000-0x0000000075601000-memory.dmp

Filesize
5.7MB

Download
memory/3688-1-0x0000000075050000-0x0000000075601000-memory.dmp

Filesize
5.7MB

Download
memory/3688-0-0x0000000075052000-0x0000000075053000-memory.dmp

Filesize
4KB

Download
memory/3688-28-0x0000000075050000-0x0000000075601000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads