MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 38ea0771a9037606de17efe07977a84d86dddee495250b50ffa3fa8879635f85. 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


Intelligence 6 IOCs YARA File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 38ea0771a9037606de17efe07977a84d86dddee495250b50ffa3fa8879635f85
SHA3-384 hash: 972dccf25ffd7e4560a862238a78eaf84b576e1e97e891d6792f358e3dbfbee417ed3db967ad65fd31ea523bb639375c
SHA1 hash: 11928139bfa4833835f05cd9b2133e9afda7e069
MD5 hash: 73f8198db045b7ae6a5e71ab7f1e96cd
humanhash: low-crazy-mike-video
File name:73f8198d_by_Libranalysis
Download: download sample
Signature VirLock
Create hunting rule
File size:1'460'224 bytes
First seen:2021-05-05 08:08:30 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 474a4602a9d1d2694f56ba8645fcb766 (1 x VirLock)
ssdeep 24576:dr5lEa05go59VcOgssCQKSoTHp2j64d4gfsuWCCHtOrlPCOYXTPSUcDu0nsrJ:dAgoDVcOqC/uj6498CCNOrlPijSUcS0g
Threatray 86 similar samples on MalwareBazaar
TLSH 1D6512443C41B413FC069CB70DF6F0A43A6722B3BD9106F1FE1E2A29D799A187C5AD69
Reporter Libranalysis


Avatar
Libranalysis
Uploaded as part of the sample sharing project

Intelligence

File Origin
# of uploads :
1
# of downloads :
100
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/150069/
Detection(s):
Win.Virus.Virlock-6332874-0
Create hunting rule

Win.Virus.Virlock-6803820-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a file
Creating a process from a recently created file
Creating a service
Launching a service
DNS request
Creating a file in the Windows subdirectories
Sending an HTTP GET request
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
Searching for the window
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
Link:
https://www.joesandbox.com/analysis/711645
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Changes the view of files in windows explorer (hidden files and folders)
Command shell drops VBS files
Contains functionality to automate explorer (e.g. start an application)
Contains functionality to check if Internet connection is working
Creates an undocumented autostart registry key
Delayed program exit found
Drops batch files with force delete cmd (self deletion)
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for submitted file
Sigma detected: WScript or CScript Dropper
Tries to detect virtualization through RDTSC time measurements
Uses cmd line tools excessively to alter registry or file data
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 404749 Sample: 73f8198d_by_Libranalysis Startdate: 05/05/2021 Architecture: WINDOWS Score: 100 115 Antivirus / Scanner detection for submitted sample 2->115 117 Multi AV Scanner detection for submitted file 2->117 119 Machine Learning detection for sample 2->119 121 Sigma detected: WScript or CScript Dropper 2->121 11 73f8198d_by_Libranalysis.exe 3 16 2->11         started        15 iAEAEMwg.exe 4 2->15         started        17 svchost.exe 2->17         started        20 naUMIkcM.exe 2->20         started        process3 dnsIp4 101 C:\Users\user\dAMMMgME\naUMIkcM.exe, PE32 11->101 dropped 103 C:\ProgramData\mmgkosQg\AYQMcQkk.exe, PE32 11->103 dropped 105 C:\ProgramData\cgoYgMgY\iAEAEMwg.exe, PE32 11->105 dropped 107 C:\Users\user\AppData\Local\...\HmAAIsck.bat, ASCII 11->107 dropped 141 Creates an undocumented autostart registry key 11->141 143 Uses cmd line tools excessively to alter registry or file data 11->143 145 Drops batch files with force delete cmd (self deletion) 11->145 22 cmd.exe 1 11->22         started        24 naUMIkcM.exe 12 11->24         started        27 AYQMcQkk.exe 7 11->27         started        30 3 other processes 11->30 147 Antivirus detection for dropped file 15->147 149 Machine Learning detection for dropped file 15->149 151 Tries to detect virtualization through RDTSC time measurements 15->151 153 Delayed program exit found 15->153 109 127.0.0.1 unknown unknown 17->109 file5 signatures6 process7 dnsIp8 32 73f8198d_by_Libranalysis.exe 4 22->32         started        36 conhost.exe 22->36         started        125 Antivirus detection for dropped file 24->125 127 Contains functionality to check if Internet connection is working 24->127 129 Machine Learning detection for dropped file 24->129 131 Contains functionality to automate explorer (e.g. start an application) 24->131 38 WerFault.exe 23 9 24->38         started        111 192.168.2.1 unknown unknown 27->111 133 Tries to detect virtualization through RDTSC time measurements 27->133 135 Delayed program exit found 27->135 40 naUMIkcM.exe 27->40         started        137 Changes the view of files in windows explorer (hidden files and folders) 30->137 42 conhost.exe 30->42         started        44 conhost.exe 30->44         started        46 conhost.exe 30->46         started        signatures9 process10 file11 91 C:\Users\user\AppData\Local\...\kccwUogc.bat, ASCII 32->91 dropped 113 Uses cmd line tools excessively to alter registry or file data 32->113 48 cmd.exe 1 32->48         started        50 cmd.exe 32->50         started        54 reg.exe 1 32->54         started        56 2 other processes 32->56 signatures12 process13 file14 58 73f8198d_by_Libranalysis.exe 48->58         started        62 conhost.exe 48->62         started        93 C:\Users\user\AppData\Local\Temp\file.vbs, ASCII 50->93 dropped 123 Command shell drops VBS files 50->123 64 conhost.exe 50->64         started        66 cscript.exe 50->66         started        68 conhost.exe 54->68         started        70 conhost.exe 56->70         started        72 conhost.exe 56->72         started        signatures15 process16 file17 99 C:\Users\user\AppData\Local\...\iWYQQgAI.bat, ASCII 58->99 dropped 139 Uses cmd line tools excessively to alter registry or file data 58->139 74 cmd.exe 58->74         started        76 reg.exe 58->76         started        78 reg.exe 58->78         started        80 reg.exe 58->80         started        signatures18 process19 process20 82 73f8198d_by_Libranalysis.exe 74->82         started        85 conhost.exe 74->85         started        87 conhost.exe 76->87         started        89 conhost.exe 78->89         started        file21 95 C:\Users\user\AppData\Local\...\TMoEQEco.bat, ASCII 82->95 dropped 97 C:\Users\user\...\73f8198d_by_Libranalysis, PE32 82->97 dropped
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/38ea0771a9037606de17efe07977a84d86dddee495250b50ffa3fa8879635f85/
Threat name:
Win32.Ransomware.VirLock
Create hunting rule
Status:
Malicious
First seen:
2021-05-05 08:09:15 UTC
AV detection:
45 of 47 (95.74%)
Threat level:
  5/5
Verdict:
malicious
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+ 76 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  10/10
Tags:
evasion persistence ransomware spyware stealer trojan
Link:
https://tria.ge/reports/210505-zmsmz44kya/
Behaviour
Modifies registry key
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of FindShellTrayWindow
Suspicious use of WriteProcessMemory
System policy modification
Enumerates physical storage devices
Drops file in Windows directory
Drops file in System32 directory
Adds Run key to start application
Checks whether UAC is enabled
Checks computer location settings
Deletes itself
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:
6ebb15b565c96c331e058072fac57a1cee4eace245ac9b0d93679d7430223504
MD5 hash:
b44b8cae8a7e376b8c38e1604457ce0a
SHA1 hash:
e1c3a2812dbaaec16eca532724f98e12a988a77e
Link:
https://www.unpac.me/results/420f9817-9f87-4633-ab8c-0b9a943bf871/
SH256 hash:
fb0f9d6ce196f44acb2f476c832c87b5738c72151b1a1d0da6504b51b198736c
MD5 hash:
461765b8587a63f6eeb0819699e62bf4
SHA1 hash:
0c27cd451afa1aa13aa98698c78325732fdca35e
Link:
https://www.unpac.me/results/420f9817-9f87-4633-ab8c-0b9a943bf871/
SH256 hash:
38ea0771a9037606de17efe07977a84d86dddee495250b50ffa3fa8879635f85
MD5 hash:
73f8198db045b7ae6a5e71ab7f1e96cd
SHA1 hash:
11928139bfa4833835f05cd9b2133e9afda7e069
Link:
https://www.unpac.me/results/420f9817-9f87-4633-ab8c-0b9a943bf871/
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.

Cape
Cape
https://www.capesandbox.com/analysis/150069/

Comments


Avatar
a̵c̵c̸i̵d̷e̵n̷t̴a̷l̴r̵e̷b̸e̴l̸ commented on 2021-05-05 09:03:47 UTC

============================================================
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