quasar | b4b4889b0d6ac058b3d39e62c9cb32fea0abb700b92e1e10325e0854470aac50

General

Target

b4b4889b0d6ac058b3d39e62c9cb32fea0abb700b92e1e10325e0854470aac50
Size

680KB
Sample

221130-wd2plabh37
MD5

3d9e3bf3109bfe73bccfb57e360fe465
SHA1

36bd2e71a35f678c8d1e8066e616706f2dcb8610
SHA256

b4b4889b0d6ac058b3d39e62c9cb32fea0abb700b92e1e10325e0854470aac50
SHA512

f24992b8f03df563eca83cce818a0d5af04094acde38af3d0acf1ec40ae87272156f56ab72121becbd82f77d296ad39b60939d2282e0167b11dcf3b33db43be7
SSDEEP

12288:a5393whFOBbosXQsI6f9fqAPzzEeEZchCBywRiaxJDj8DkIonQmP0Ove/diuHc:a53uhFzsAibzzEe9wRiaLSkI8QhOQ18

Score

10^/10

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

ajith

C2

23.105.131.178:7812

Mutex

VNM_MUTEX_NdVd2sPSSqFdo7I35g

Attributes

encryption_key
jyerms3KOWmt3C9DBFuq
install_name
Windows Defender Security.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows Update
subdirectory
SubDir

Targets

- Target
  
  b4b4889b0d6ac058b3d39e62c9cb32fea0abb700b92e1e10325e0854470aac50
- Size
  
  680KB
- MD5
  
  3d9e3bf3109bfe73bccfb57e360fe465
- SHA1
  
  36bd2e71a35f678c8d1e8066e616706f2dcb8610
- SHA256
  
  b4b4889b0d6ac058b3d39e62c9cb32fea0abb700b92e1e10325e0854470aac50
- SHA512
  
  f24992b8f03df563eca83cce818a0d5af04094acde38af3d0acf1ec40ae87272156f56ab72121becbd82f77d296ad39b60939d2282e0167b11dcf3b33db43be7
- SSDEEP
  
  12288:a5393whFOBbosXQsI6f9fqAPzzEeEZchCBywRiaxJDj8DkIonQmP0Ove/diuHc:a53uhFzsAibzzEe9wRiaLSkI8QhOQ18
Score

10^/10

quasar venomrat ajith evasion persistence rat rootkit spyware stealer trojan
- Contains code to disable Windows Defender
  A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.
- Modifies Windows Defender Real-time Protection settings
  evasion trojan
- Quasar RAT
  Quasar is an open source Remote Access Tool.
  trojan spyware quasar
- Quasar payload
- 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
- Checks computer location settings
  Looks up country code configured in the registry, likely geofence.
- Deletes itself
- Loads dropped DLL
- Windows security modification
  evasion trojan
- Adds Run key to start application
  persistence
- Looks up external IP address via web service
  Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext
behavioral1 behavioral2