avoslocker | f8e99bbacc62b0f72aa12f5f92e35607fa0382a881fe4a4b9476fc6b87a03c78 | Triage

Sharing

General

Target

f8e99bbacc62b0f72aa12f5f92e35607fa0382a881fe4a4b9476fc6b87a03c78
Size

807KB
Sample

240909-d24jzssbrf
MD5

8da384b2427b8397a5934182c159c257
SHA1

7bcd2d32a19c1ac7bd014dc9e64b806fdff5f5de
SHA256

f8e99bbacc62b0f72aa12f5f92e35607fa0382a881fe4a4b9476fc6b87a03c78
SHA512

3c4b1736efa48a4897769f12df488e60737523eaffc886ecfbd5b7191f058749bdb4a36feb067e8ca0ef418a7602b3390b6cf465412b88a4ba2fce8a4d670a89
SSDEEP

12288:0Z4s3rg9u/2/oT+NXtHLlP/O+OeO+OeNhBBhhBBAtHg9rjI+LXJ0ivlzkHBDsYAu:u4s+oT+NXBLi0rjFXvyHBlb6CZa8

Score

10^/10

avoslocker defense_evasion discovery evasion execution impact ransomware

Malware Config

Targets

- Target
  
  f8e99bbacc62b0f72aa12f5f92e35607fa0382a881fe4a4b9476fc6b87a03c78
- Size
  
  807KB
- MD5
  
  8da384b2427b8397a5934182c159c257
- SHA1
  
  7bcd2d32a19c1ac7bd014dc9e64b806fdff5f5de
- SHA256
  
  f8e99bbacc62b0f72aa12f5f92e35607fa0382a881fe4a4b9476fc6b87a03c78
- SHA512
  
  3c4b1736efa48a4897769f12df488e60737523eaffc886ecfbd5b7191f058749bdb4a36feb067e8ca0ef418a7602b3390b6cf465412b88a4ba2fce8a4d670a89
- SSDEEP
  
  12288:0Z4s3rg9u/2/oT+NXtHLlP/O+OeO+OeNhBBhhBBAtHg9rjI+LXJ0ivlzkHBDsYAu:u4s+oT+NXBLi0rjFXvyHBlb6CZa8
Score

10^/10

avoslocker defense_evasion discovery evasion execution impact ransomware
- Avoslocker Ransomware
  Avoslocker is a relatively new ransomware, that was observed in late June and early July, 2021.
  ransomware avoslocker
- Deletes shadow copies
  Ransomware often targets backup files to inhibit system recovery.
  ransomware defense_evasion impact execution
- Modifies boot configuration data using bcdedit
  ransomware evasion
- Renames multiple (8457) files with added filename extension
  This suggests ransomware activity of encrypting all the files on the system.
  ransomware
- Drops desktop.ini file(s)
- Enumerates connected drives
  Attempts to read the root path of hard drives other than the default C: drive.
- Sets desktop wallpaper using registry
  ransomware
behavioral1 behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

PowerShell

Windows Management Instrumentation

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

Indicator Removal

File Deletion

Modify Registry

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

System Location Discovery

System Language Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

Inhibit System Recovery

Tasks

static1

behavioral1

avoslockerdefense_evasiondiscoveryevasionexecutionimpactransomware

behavioral2

avoslockerdefense_evasiondiscoveryevasionexecutionimpactransomware