MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c4e65faf6f4523c62c3eaf6b319697a154af57683325960e787c043c321aedbb. 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


Stop


Vendor detections: 18


Intelligence 18 IOCs YARA 15 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c4e65faf6f4523c62c3eaf6b319697a154af57683325960e787c043c321aedbb
SHA3-384 hash: 560ea9aeb789df4309a14439204beb8522cea782b6b9c19899d736fccf6856e035e9f657f75a515d61686a7e2ace5012
SHA1 hash: e1e3345aaab10b5e8f9071d189d636fad9361963
MD5 hash: 6d4e85449029cd8bd2ca1b48c3f44f64
humanhash: butter-five-florida-fanta
File name:buildz.exe
Download: download sample
Signature Stop
Create hunting rule
File size:772'608 bytes
First seen:2023-08-24 16:37:54 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 2a0116df27e92a9910b42edcbfe45f8d (1 x Stop, 1 x Smoke Loader, 1 x LaplasClipper)
ssdeep 12288:5qPbLhJbGasZNLIiyU5tuw4MEImh4o2oTdu7NAJY:56HzbhUXuw4MmLFTD
Threatray 2'282 similar samples on MalwareBazaar
TLSH T1FDF4127176B2D072C46A09714838E5E8623F787256B44A4B3B381F3F5D303A99BE5B8D
TrID 37.3% (.EXE) Win64 Executable (generic) (10523/12/4)
17.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
16.0% (.EXE) Win32 Executable (generic) (4505/5/1)
7.3% (.ICL) Windows Icons Library (generic) (2059/9)
7.2% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon 0008100008040400 (1 x Stop)
Reporter dancho_danchev
Tags:exe Stop

Intelligence

File Origin
# of uploads :
1
# of downloads :
318
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
stop
Create hunting rule
ID:
1
File name:
buildz.exe
Verdict:
Malicious activity
Analysis date:
2023-08-24 16:38:47 UTC
Tags:
ransomware stop loader stealer vidar trojan arkei
Link:
https://app.any.run/tasks/3d1bf63a-40b8-4f42-8c47-bfa06b77374b

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
STOP
Create hunting rule
Link:
https://www.capesandbox.com/analysis/444570/
Detection(s):
Win.Packer.pkr_ce1a-9980177-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a custom TCP request
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Сreating synchronization primitives
Creating a file in the %temp% directory
Running batch commands
Creating a process with a hidden window
Query of malicious DNS domain
Sending a TCP request to an infection source
Result
Malware family:
n/a
Score:
  9/10
Tags:
n/a
Link:
https://dragonfly.certego.net/analysis/108487/overview
Behaviour
MalwareBazaar
CPUID_Instruction
SystemUptime
MeasuringTime
EvasionGetTickCount
EvasionQueryPerformanceCounter
CheckCmdLine
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
86%
Tags:
greyware packed
Link:
https://www.filescan.io/uploads/64e7876a2a89064e5599fb4d/reports/cecd4c88-a8f6-48a6-9196-30ec95fcbbe9/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/c4e65faf6f4523c62c3eaf6b319697a154af57683325960e787c043c321aedbb
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.
Malware family:
STOP Ransomware
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/63ba3719-9619-4eaa-a3d1-6e6aaa9bb265
Result
Threat name:
Djvu
Create hunting rule
Detection:
malicious
Classification:
rans.troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1296863
Signature
C2 URLs / IPs found in malware configuration
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Found malware configuration
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Yara detected Djvu Ransomware
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1296863 Sample: buildz.exe Startdate: 24/08/2023 Architecture: WINDOWS Score: 100 41 Found malware configuration 2->41 43 Malicious sample detected (through community Yara rule) 2->43 45 Multi AV Scanner detection for submitted file 2->45 47 3 other signatures 2->47 8 buildz.exe 2->8         started        11 buildz.exe 2->11         started        13 buildz.exe 2->13         started        15 buildz.exe 2->15         started        process3 signatures4 49 Detected unpacking (changes PE section rights) 8->49 51 Detected unpacking (overwrites its own PE header) 8->51 53 Injects a PE file into a foreign processes 8->53 17 buildz.exe 1 16 8->17         started        55 Multi AV Scanner detection for dropped file 11->55 57 Machine Learning detection for dropped file 11->57 21 buildz.exe 12 11->21         started        23 buildz.exe 12 13->23         started        25 buildz.exe 12 15->25         started        process5 dnsIp6 39 api.2ip.ua 162.0.217.254, 443, 49736, 49738 ACPCA Canada 17->39 35 C:\Users\user\AppData\Local\...\buildz.exe, PE32 17->35 dropped 27 buildz.exe 17->27         started        30 icacls.exe 17->30         started        file7 process8 signatures9 59 Injects a PE file into a foreign processes 27->59 32 buildz.exe 12 27->32         started        process10 dnsIp11 37 api.2ip.ua 32->37
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c4e65faf6f4523c62c3eaf6b319697a154af57683325960e787c043c321aedbb/
Threat name:
Win32.Trojan.SmokeLoader
Create hunting rule
Status:
Malicious
First seen:
2023-08-23 15:55:21 UTC
File Type:
PE (Exe)
Extracted files:
13
AV detection:
30 of 36 (83.33%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=yttf7l3piur4mlb6v5vtdfuxufkk6v3igmszmdtypqcdymq25w5q._file
Verdict:
malicious
Similar samples:
0ac65da52d7a63e098d05b33da91b1e26a9d6b2d47cb0b40112dba5020ea8dc5
Stop
0e43e010ea75b309f11c8f0d3b5469c3344f0424461c7e41633f06c816e52a9f
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30c76f05ef5f620e025fdbe3586002e54410ba8675bf8d5aa7e26a656a769fac
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484c5744d61f823650e0e4d8c6f4b0c7235a3ebab72af70ecaa8f15f11f4e0d2
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b400719f8b063e5bff8e3f21dc4853dc51ee2baabc61d0b4c85d791c7336ae9c
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Stop
+ 2'272 additional samples on MalwareBazaar
Result
Malware family:
vidar
Create hunting rule
Score:
  10/10
Tags:
family:djvu family:vidar botnet:562ce294a991b18054802a17b24ce0f9 discovery persistence ransomware spyware stealer
Link:
https://tria.ge/reports/230824-t5c47sfe5t/
Behaviour
Creates scheduled task(s)
Delays execution with timeout.exe
Modifies system certificate store
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses 2FA software files, possible credential harvesting
Adds Run key to start application
Looks up external IP address via web service
Executes dropped EXE
Loads dropped DLL
Modifies file permissions
Reads user/profile data of web browsers
Downloads MZ/PE file
Detected Djvu ransomware
Djvu Ransomware
Vidar
Malware Config
C2 Extraction:
http://zexeq.com/test1/get.php
https://t.me/buukcay
https://steamcommunity.com/profiles/76561199544211655
Unpacked files
SH256 hash:
67b65b7fef0778225ac61f37bd580f018a14a536cd4be8d52edf8c357bd55d1a
MD5 hash:
20628ced80e13512346ec0fd89dd4f98
SHA1 hash:
e56f6226f172fbdc87c7cc9eddae6782be4a568e
Detections:
djvu_ransomware
Create hunting rule
win_stop_auto
Create hunting rule
Link:
https://www.unpac.me/results/af2fa11b-ef44-4821-a79c-9f98e81cec1a/
Parent samples :
6822b497f3e38d94f3118a9310670f89e32c06f1ea88df09931887ac57880281
c4e65faf6f4523c62c3eaf6b319697a154af57683325960e787c043c321aedbb
SH256 hash:
c4e65faf6f4523c62c3eaf6b319697a154af57683325960e787c043c321aedbb
MD5 hash:
6d4e85449029cd8bd2ca1b48c3f44f64
SHA1 hash:
e1e3345aaab10b5e8f9071d189d636fad9361963
Link:
https://www.unpac.me/results/af2fa11b-ef44-4821-a79c-9f98e81cec1a/
Malware family:
Djvu
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c4e65faf6f45/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/c4e65faf6f4523c62c3eaf6b319697a154af57683325960e787c043c321aedbb

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerException__SetConsoleCtrl
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:maldoc_getEIP_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)
Rule name:MALWARE_Win_STOP
Create hunting rule
Author:ditekSHen
Description:Detects STOP ransomware
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:SHA512_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA384/SHA512 constants
Rule name:SUSP_XORed_URL_in_EXE
Create hunting rule
Author:Florian Roth (Nextron Systems)
Description:Detects an XORed URL in an executable
Reference:https://twitter.com/stvemillertime/status/1237035794973560834
Rule name:SUSP_XORed_URL_in_EXE_RID2E46
Create hunting rule
Author:Florian Roth
Description:Detects an XORed URL in an executable
Reference:https://twitter.com/stvemillertime/status/1237035794973560834
Rule name:Windows_Ransomware_Stop_1e8d48ff
Create hunting rule
Author:Elastic Security
Rule name:win_stop_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.stop.

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

Stop

Executable exe c4e65faf6f4523c62c3eaf6b319697a154af57683325960e787c043c321aedbb

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2615181/
Cape
Cape
https://www.capesandbox.com/analysis/444570/

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