bazarbackdoor

Target

230823-139hyshd3w_pw_infected.zip
Size

472KB
Sample

240814-as1j7asepc
MD5

e3af7d1463d266e02cd03ea7a3add2e4
SHA1

6456c0de00c86db5e7d061fbf7e19792d3dbbc4a
SHA256

8ef176944e54df85db028979ceb66b2b6e807b1615f4254c273d4b433caec0dd
SHA512

855e4ba5316a800113f6f410d37ba7e981c0f72bb23664c26e464777f2a0a96d8f651e77189af89e70be9d032a3a1b7b40b005bd60b9f6dc792c7588b3a8d9bb
SSDEEP

12288:ABgmK1z0D2TuzS4cu2LH6WhBO8RiKrDmlPPoSdERZIhp4TWo3:2BKqSt4AH6Whc2fqPoSdEDRWo3

Score

10^/10

Malware Config

Targets

- Target
  
  dl2.exe
- Size
  
  849KB
- MD5
  
  c2055b7fbaa041d9f68b9d5df9b45edd
- SHA1
  
  e4bd443bd4ce9029290dcd4bb47cb1a01f3b1b06
- SHA256
  
  342f04c4720590c40d24078d46d9b19d8175565f0af460598171d58f5ffc48f3
- SHA512
  
  18905b75938b8af9468b1aa3ffbae796a139c2762e623aa6ffb9ec2b293dd04aa1f90d1ed5a7dbda7853795a3688e368121a134c7f63e527a8e5e7679301a1dc
- SSDEEP
  
  12288:A3RY3yNqMRTF4q2rxHn2ot/81xpNQyjUXlmoe7ufjHAtjXD7r2:A3RY3R24q+xn/8Xp2yOl5fzQ/2
Score

10^/10

bazarbackdoor adware backdoor discovery evasion persistence privilege_escalation stealer trojan upx
- Adds autorun key to be loaded by Explorer.exe on startup
  persistence
- BazarBackdoor
  Stealthy backdoor targeting corporate networks, believed to be developed by Trickbot's authors.
  backdoor bazarbackdoor
- Modifies WinLogon for persistence
  persistence
- Boot or Logon Autostart Execution: Active Setup
  Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.
  persistence
- Downloads MZ/PE file
- Event Triggered Execution: AppInit DLLs
  Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
  persistence privilege_escalation
- Manipulates Digital Signatures
  Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.
- Tries to connect to .bazar domain
  Attempts to lookup or connect to a .bazar domain, used by BazarBackdoor, Trickbot, and potentially others.
- Executes dropped EXE
- Modifies file permissions
  discovery
- UPX packed file
  Detects executables packed with UPX/modified UPX open source packer.
  upx
- Unexpected DNS network traffic destination
  Network traffic to other servers than the configured DNS servers was detected on the DNS port.
- Checks installed software on the system
  Looks up Uninstall key entries in the registry to enumerate software on the system.
  discovery
- Checks whether UAC is enabled
  evasion trojan
- Creates a large amount of network flows
  This may indicate a network scan to discover remotely running services.
  discovery
- Installs/modifies Browser Helper Object
  BHOs are DLL modules which act as plugins for Internet Explorer.
  stealer adware
- Legitimate hosting services abused for malware hosting/C2
- Modifies WinLogon
  persistence
- AutoIT Executable
  AutoIT scripts compiled to PE executables.
- Suspicious use of SetThreadContext
behavioral1 behavioral2