MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 bb65532e8a52e282d98938031c0d75155082933524924d01de4246e12690cf9c. 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


KnightCrypt


Vendor detections: 10


Intelligence 10 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: bb65532e8a52e282d98938031c0d75155082933524924d01de4246e12690cf9c
SHA3-384 hash: 34bfa7648cae7dcdacd4e056dc2fa9ebaf6ef95c7e568415b5ce80d04a1739285a2f9afd851de7012d4b79539e0eae12
SHA1 hash: 2c4c0d875a2432d5590f32c64bdcfebddd9ccdd4
MD5 hash: 219e1bd62a715ebbe536ea581e0c1578
humanhash: bulldog-bravo-missouri-thirteen
File name:bj3n3ma8q7yc2tsbyv7s.exe
Download: download sample
Signature KnightCrypt
Create hunting rule
File size:1'165'432 bytes
First seen:2023-09-01 08:42:25 UTC
Last seen:2023-09-04 06:18:25 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 92ed8fb21c381a073a5e7ca35347f90e (13 x KnightCrypt)
ssdeep 12288:RBVVtkNBJOlMmXP0447OdMyogfJ7gwPueClVVRWM5YDh8xpoPPouMA+nkGGCp+D:CTcCG0447AMVgfdnTClVm4QPcGRD
Threatray 19 similar samples on MalwareBazaar
TLSH T16F459E17B69941E8D06AD1B4CB564132EA72BC510F34AADF0690B3192F7BEE46F3E710
TrID 63.5% (.EXE) Win64 Executable (generic) (10523/12/4)
12.2% (.EXE) OS/2 Executable (generic) (2029/13)
12.0% (.EXE) Generic Win/DOS Executable (2002/3)
12.0% (.EXE) DOS Executable Generic (2000/1)
Reporter 1ZRR4H
Tags:exe KnightCrypt

Intelligence

File Origin
# of uploads :
3
# of downloads :
290
Origin country :
CL CL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
bj3n3ma8q7yc2tsbyv7s.exe
Verdict:
No threats detected
Analysis date:
2023-09-01 08:43:08 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/3680c9f6-ff95-462c-a09a-c44a1435d52b

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/445584/
Detection(s):
SecuriteInfo.com.Trojan.Encoder.37908.7221.24387.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
DNS request
Sending a custom TCP request
Sending an HTTP GET request
Creating a file in the %AppData% subdirectories
Launching cmd.exe command interpreter
Creating a file in the %temp% directory
Launching a process
Creating a file in the mass storage device
Unauthorized injection to a system process
Encrypting user's files
Gathering data
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-debug control explorer greyware lolbin overlay packed phishing shell32
Link:
https://www.filescan.io/uploads/64f1a419b3b7d7c782d234c6/reports/acf9fde1-3817-4727-bfb2-b8a4ca538dc7/overview
Verdict:
Malicious
Labled as:
Win64/Agent.CUP trojan
Link:
https://www.hybrid-analysis.com/sample/bb65532e8a52e282d98938031c0d75155082933524924d01de4246e12690cf9c
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.
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/066385df-0fbc-4a3e-8cbd-8f7d84b8d632
Result
Threat name:
KnightCrypt
Create hunting rule
Detection:
malicious
Classification:
evad.rans.expl
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1301492
Signature
Antivirus detection for dropped file
Connects to many different private IPs (likely to spread or exploit)
Connects to many different private IPs via SMB (likely to spread or exploit)
Found hidden mapped module (file has been removed from disk)
Found ransom note / readme
Found Tor onion address
Injects code into the Windows Explorer (explorer.exe)
Machine Learning detection for dropped file
Maps a DLL or memory area into another process
Modifies existing user documents (likely ransomware behavior)
PE file contains section with special chars
System process connects to network (likely due to code injection or exploit)
Writes a notice file (html or txt) to demand a ransom
Writes to foreign memory regions
Yara detected KnightCrypt Ransomware
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1301492 Sample: bj3n3ma8q7yc2tsbyv7s.exe Startdate: 01/09/2023 Architecture: WINDOWS Score: 100 32 nginx.org 2->32 34 i.ibb.co 2->34 50 Antivirus detection for dropped file 2->50 52 Found ransom note / readme 2->52 54 Yara detected KnightCrypt Ransomware 2->54 56 3 other signatures 2->56 8 bj3n3ma8q7yc2tsbyv7s.exe 4 2->8         started        signatures3 process4 signatures5 58 Writes to foreign memory regions 8->58 60 Maps a DLL or memory area into another process 8->60 11 cmd.exe 2 8->11         started        process6 file7 30 C:\Users\user\AppData\Local\Temp\hstaymgt, PE32+ 11->30 dropped 62 Injects code into the Windows Explorer (explorer.exe) 11->62 64 Writes to foreign memory regions 11->64 66 Found hidden mapped module (file has been removed from disk) 11->66 68 Maps a DLL or memory area into another process 11->68 15 explorer.exe 33 38 11->15         started        20 conhost.exe 11->20         started        signatures8 process9 dnsIp10 36 192.168.2.100 unknown unknown 15->36 38 192.168.2.101 unknown unknown 15->38 40 98 other IPs or domains 15->40 22 C:\Users\user\How To Restore Your Files.txt, ASCII 15->22 dropped 24 C:\Users\user\Desktop\ZIPXYXWIOY.mp3, data 15->24 dropped 26 C:\Users\user\Desktop\...OWRVPQCCS.docx, data 15->26 dropped 28 10 other malicious files 15->28 dropped 42 System process connects to network (likely due to code injection or exploit) 15->42 44 Connects to many different private IPs via SMB (likely to spread or exploit) 15->44 46 Connects to many different private IPs (likely to spread or exploit) 15->46 48 3 other signatures 15->48 file11 signatures12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/bb65532e8a52e282d98938031c0d75155082933524924d01de4246e12690cf9c/
Threat name:
Win64.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2023-09-01 08:43:08 UTC
File Type:
PE+ (Exe)
Extracted files:
1
AV detection:
14 of 24 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xnsvglukklrifwmjhabrydlvcviifezvesje2ao6ijdocjuqz6oa._file
Verdict:
malicious
Similar samples:
0701df6ec96aaea2af21707445fdfd8812dd8b7c7e695b920eedca205518826c
KnightCrypt
08d8bd49d5248a1ceca14cd69f327f6685dbc44887aab5a14eb79c71baa123c1
KnightCrypt
3fbedfb9ae1e9bcef7983491124e3a50937f9c5209b7cfc2614197a2e8045cfb
KnightCrypt
5ebc114af099dbf4ce24cd2cad3e5ab783383d2217520e162fcc21feca88d3b9
KnightCrypt
66871cebfa92f04476679fb3b00a125f7eb43ea35cfb8b187b4aa2bbd0230c10
KnightCrypt
6ae637c07dea5f9186ac3e6090664fdbcf8523fe82a8a94d70ca2cf69db630e1
KnightCrypt
7aa4903001e55982d11c76c178d9006aaaf137c5a941067cc6bf1b91edde62a1
KnightCrypt
b287c0bc239b434b90eef01bcbd00ff48192b7cbeb540e568b8cdcdc26f90959
KnightCrypt
b6064f6936f72d1312f40f86f0cb889c6d0477c20f59c6c96c385c6287f701f7
KnightCrypt
e62d6e57a7ab153771d9c550062cc67f6d5befcc52286bd6f1543201f7088acd
KnightCrypt
+ 9 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  10/10
Tags:
ransomware
Link:
https://tria.ge/reports/230901-kmkxnadf4z/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Uses Volume Shadow Copy service COM API
Suspicious use of SetThreadContext
Drops desktop.ini file(s)
Enumerates connected drives
Renames multiple (205) files with added filename extension
Unpacked files
SH256 hash:
bb65532e8a52e282d98938031c0d75155082933524924d01de4246e12690cf9c
MD5 hash:
219e1bd62a715ebbe536ea581e0c1578
SHA1 hash:
2c4c0d875a2432d5590f32c64bdcfebddd9ccdd4
Link:
https://www.unpac.me/results/80aae4c4-b641-4611-87a8-9dce3cdaac31/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.58
Link:
https://yomi.yoroi.company/submissions/bb65532e8a52e282d98938031c0d75155082933524924d01de4246e12690cf9c

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:Check_OutputDebugStringA_iat
Create hunting rule
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:PE_Potentially_Signed_Digital_Certificate
Create hunting rule
Author:albertzsigovits
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

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/445584/

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