njrat | 1968e3bcc004ba237691e2ae872b2938a289328c218c85dcad38c7e56b11cd85

General

Target

vir.exe
Size

311.5MB
Sample

240524-z4pdqsbe84
MD5

4f412bd6216ad15e1508afceafd7f3e4
SHA1

17ff12a5c482cb8e356930b69c6159e3431585ba
SHA256

1968e3bcc004ba237691e2ae872b2938a289328c218c85dcad38c7e56b11cd85
SHA512

320610fec9e9cf7df279c74322c2f052c6f17bdb22a8d7f25c8fce039603760bbd9c7d273b24193e2f87b11bbc9b4142b690c77c96fa3eaae24e468584bdde4a
SSDEEP

6291456:b2qVJw+odBeWFv1k4R4b0ewZkhT4ofHwJjvZDQPf2tLSkHjdHVeVM:Sr+WeSWgfecGT4RjvqP85xAK

Score

10^/10

Malware Config

Extracted

Family

quasar

Attributes

reconnect_delay
3000

Extracted

Family

quasar

Version

1.4.1

Botnet

romka

C2

jozzu420-51305.portmap.host:51305

Mutex

0445c342-b551-411c-9b80-cd437437f491

Attributes

encryption_key
E1BF1D99459F04CAF668F054744BC2C514B0A3D6
install_name
Romilyaa.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows 10 Boot
subdirectory
SubDir

Targets

- Target
  
  vir.exe
- Size
  
  311.5MB
- MD5
  
  4f412bd6216ad15e1508afceafd7f3e4
- SHA1
  
  17ff12a5c482cb8e356930b69c6159e3431585ba
- SHA256
  
  1968e3bcc004ba237691e2ae872b2938a289328c218c85dcad38c7e56b11cd85
- SHA512
  
  320610fec9e9cf7df279c74322c2f052c6f17bdb22a8d7f25c8fce039603760bbd9c7d273b24193e2f87b11bbc9b4142b690c77c96fa3eaae24e468584bdde4a
- SSDEEP
  
  6291456:b2qVJw+odBeWFv1k4R4b0ewZkhT4ofHwJjvZDQPf2tLSkHjdHVeVM:Sr+WeSWgfecGT4RjvqP85xAK
Score

10^/10

quasar umbral romka discovery evasion execution exploit persistence ransomware spyware stealer themida trojan upx
- Detect Umbral payload
- Quasar RAT
  Quasar is an open source Remote Access Tool.
  trojan spyware quasar
- Quasar payload
- UAC bypass
  evasion trojan
- Umbral
  Umbral stealer is an opensource moduler stealer written in C#.
  stealer umbral
- Windows security bypass
  evasion trojan
- Command and Scripting Interpreter: PowerShell
  Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
  execution
- Downloads MZ/PE file
- Drops file in Drivers directory
- Manipulates Digital Signatures
  Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.
- Modifies Windows Firewall
  evasion
- Possible privilege escalation attempt
  exploit
- .NET Reactor proctector
  Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.
- Checks computer location settings
  Looks up country code configured in the registry, likely geofence.
- Drops startup file
- Executes dropped EXE
- Loads dropped DLL
- Modifies file permissions
  discovery
- Registers COM server for autorun
  persistence
- Themida packer
  Detects Themida, an advanced Windows software protection system.
  themida
- UPX packed file
  Detects executables packed with UPX/modified UPX open source packer.
  upx
- Checks installed software on the system
  Looks up Uninstall key entries in the registry to enumerate software on the system.
  discovery
- Legitimate hosting services abused for malware hosting/C2
- Looks up external IP address via web service
  Uses a legitimate IP lookup service to find the infected system's external IP.
- AutoIT Executable
  AutoIT scripts compiled to PE executables.
- Drops file in System32 directory
- Sets desktop wallpaper using registry
  ransomware
- Suspicious use of SetThreadContext
behavioral1