MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 8fe741671e4f7eff22dead5393a4fcfa06c7ee683649ea352a4787240b7c7a77. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.
Database Entry
VirLock
Vendor detections: 6
| SHA256 hash: | 8fe741671e4f7eff22dead5393a4fcfa06c7ee683649ea352a4787240b7c7a77 |
|---|---|
| SHA3-384 hash: | fa8e349ffb2e9530e6b0104476a3482520cf26f1005914d1155dec07c5fa71173026716fbbc22a25067c624114a75f22 |
| SHA1 hash: | e7f1427dd4e041ff5fa4111097b8fec3a5ccb300 |
| MD5 hash: | 967a74427ba55b5c20417975bff6b253 |
| humanhash: | north-diet-uniform-purple |
| File name: | 967a7442_by_Libranalysis |
| Download: | download sample |
| Signature | VirLock |
| File size: | 769'024 bytes |
| First seen: | 2021-05-05 10:08:02 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | a79e201072e4d77215f367bd43048e71 (1 x VirLock) |
| ssdeep | 12288:CCbL+ZOyhB4VhtqhAv8M6bKt14UgzB7HPblhsIUaW1uBfI1QBZgBZ/cnBlxtmLTm:TWoyD4Vhtqihv14h5YwZgBZ/cnB9oTm |
| Threatray | 208 similar samples on MalwareBazaar |
| TLSH | 9BF49D0AF65E64B6FE14F02C41A6A23E13D398E3757286704EC9EEF27E2A51B135C507 |
| Reporter |  Libranalysis |
Intelligence
File Origin
# of uploads :
1
# of downloads :
95
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Detection(s):
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a file
Creating a process from a recently created file
Creating a service
DNS request
Launching a service
Sending a UDP request
Creating a file in the Windows subdirectories
Searching for the window
Creating a file in the %temp% directory
Running batch commands
Deleting a recently created file
Launching a process
Creating a process with a hidden window
Sending an HTTP GET request
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun for a service
Enabling autorun
Brute forcing passwords of local accounts
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
Unknown
Detection:
malicious
Classification:
evad
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Changes security center settings (notifications, updates, antivirus, firewall)
Contains functionality to automate explorer (e.g. start an application)
Contains functionality to check if Internet connection is working
Contains functionality to detect hardware virtualization (CPUID execution measurement)
Creates an undocumented autostart registry key
Delayed program exit found
Detected unpacking (overwrites its own PE header)
Injects code into the Windows Explorer (explorer.exe)
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for submitted file
Tries to detect virtualization through RDTSC time measurements
Uses cmd line tools excessively to alter registry or file data
Behaviour
Behavior Graph:
Threat name:
Win32.Ransomware.VirLock
Status:
Malicious
First seen:
2021-05-05 10:08:31 UTC
AV detection:
44 of 47 (93.62%)
Threat level:
5/5
Verdict:
malicious
Similar samples:
+ 198 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
10/10
Tags:
evasion persistence ransomware spyware stealer trojan
Behaviour
Modifies registry key
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Drops file in Windows directory
Drops file in System32 directory
Adds Run key to start application
Checks computer location settings
Loads dropped DLL
Reads user/profile data of web browsers
Executes dropped EXE
Modifies extensions of user files
Modifies WinLogon for persistence
Modifies visibility of file extensions in Explorer
UAC bypass
Unpacked files
SH256 hash:
729d140140c3af5b46031f1a7652b159b08721afa80776f17afe73633800afc1
MD5 hash:
f848a48532cbc478c15234e75fc08e16
SHA1 hash:
3a49dc206a31770853e8307cc7d5b9cbe5739dcb
SH256 hash:
9d47a45d98ab187609c71cc4804be1878fdb69f64ddb43f7d2442cfa7294b56f
MD5 hash:
59b58fff1ee3923585c0e9b821f02ad3
SHA1 hash:
35e3505bf7ceb01eb2b5dd6f46550bfeae2fe136
SH256 hash:
fbd2d5454988af9d8571ddc67662436cf686ef60edf80bd98c4a298fe2523ae6
MD5 hash:
cfd20073c1d26ce721c03265c4c999ba
SHA1 hash:
2202c39983e7da21bac7ef55d2cb4fa21730c9dd
SH256 hash:
8fe741671e4f7eff22dead5393a4fcfa06c7ee683649ea352a4787240b7c7a77
MD5 hash:
967a74427ba55b5c20417975bff6b253
SHA1 hash:
e7f1427dd4e041ff5fa4111097b8fec3a5ccb300
Please note that we are no longer able to provide a coverage score for Virus Total.
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Comments
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MBC behaviors list (github.com/accidentalrebel/mbcscan):
============================================================
0) [B0009.029] Anti-Behavioral Analysis::Instruction Testing
1) [C0030.001] Data Micro-objective::MurmurHash::Non-Cryptographic Hash