MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 7aa4903001e55982d11c76c178d9006aaaf137c5a941067cc6bf1b91edde62a1. 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: 9


Intelligence 9 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 7aa4903001e55982d11c76c178d9006aaaf137c5a941067cc6bf1b91edde62a1
SHA3-384 hash: 85df858381e24cba3eeacdb56c1e9b3a9fcff08a25bc582e2337f85a2f8aad355e84889caa55c9fc98e471206222e4e1
SHA1 hash: 9a23ea86a1d8ef5d197b90c3153f3896a651517c
MD5 hash: 08c16ed985828b4b6d70a5ffda6abc60
humanhash: failed-pluto-eight-alaska
File name:SecuriteInfo.com.Trojan.Win32.Inject.apcxr.9383.27557
Download: download sample
Signature KnightCrypt
Create hunting rule
File size:1'392'760 bytes
First seen:2023-08-29 21:37:04 UTC
Last seen:2023-09-04 06:18:03 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 92ed8fb21c381a073a5e7ca35347f90e (13 x KnightCrypt)
ssdeep 12288:mBVVtkNBJOlMmXP0447OdMyogfJ7gwPueClVVRWM5YDh8xpoP2ouMA+nkGGCp+yE:3TcCG0447AMVgfdnTClVm4Q2cGRAS
Threatray 13 similar samples on MalwareBazaar
TLSH T1FE556B07B69941E8D43AC1B0CA564332EE71BC950F34A9DF0690B3592F7BEE46B3A711
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)
File icon (PE):PE icon
dhash icon 40317969e9e96000 (17 x KnightCrypt, 1 x Knight)
Reporter SecuriteInfoCom
Tags:89-23-96-203 exe KnightCrypt

Intelligence

File Origin
# of uploads :
4
# of downloads :
292
Origin country :
FR FR
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
SecuriteInfo.com.Trojan.Win32.Inject.apcxr.9383.27557
Verdict:
No threats detected
Analysis date:
2023-08-29 21:37:54 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/c319bdb0-cf06-4983-a78a-573f59d8337e

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/445156/
Detection(s):
SecuriteInfo.com.Trojan.Win32.Inject.apcxr.9383.27557.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
Сreating synchronization primitives
Using the Windows Management Instrumentation requests
Launching a service
Creating a file
Changing a file
Modifies multiple files
Moving a recently created file
Creating a file in the mass storage device
Unauthorized injection to a system process
Forced shutdown of a browser
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/64ee653b2a47256e3a2e8116/reports/7049633e-a59f-47b5-afab-67b322c16dce/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/7aa4903001e55982d11c76c178d9006aaaf137c5a941067cc6bf1b91edde62a1
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/c9a180ff-8cd1-4235-9876-5d140fa7d346
Result
Threat name:
KnightCrypt
Create hunting rule
Detection:
malicious
Classification:
evad.rans.expl
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1299930
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 signatures2 2 Behavior Graph ID: 1299930 Sample: SecuriteInfo.com.Trojan.Win... Startdate: 30/08/2023 Architecture: WINDOWS Score: 100 44 Antivirus detection for dropped file 2->44 46 Found ransom note / readme 2->46 48 Yara detected KnightCrypt Ransomware 2->48 50 3 other signatures 2->50 7 SecuriteInfo.com.Trojan.Win32.Inject.apcxr.9383.27557.exe 4 2->7         started        process3 dnsIp4 40 nginx.org 7->40 42 i.ibb.co 7->42 60 Writes to foreign memory regions 7->60 62 Maps a DLL or memory area into another process 7->62 11 cmd.exe 2 7->11         started        15 svchost.exe 1 7->15         started        signatures5 process6 file7 32 C:\Users\user\AppData\Local\Temp\wnuhtomnyy, PE32+ 11->32 dropped 64 Injects code into the Windows Explorer (explorer.exe) 11->64 66 Writes to foreign memory regions 11->66 68 Found hidden mapped module (file has been removed from disk) 11->68 70 Maps a DLL or memory area into another process 11->70 17 explorer.exe 30 40 11->17         started        22 conhost.exe 11->22         started        signatures8 process9 dnsIp10 34 192.168.2.100 unknown unknown 17->34 36 192.168.2.101 unknown unknown 17->36 38 98 other IPs or domains 17->38 24 C:\Users\user\How To Restore Your Files.txt, ASCII 17->24 dropped 26 C:\Users\...\How To Restore Your Files.txt, ASCII 17->26 dropped 28 C:\Users\...\How To Restore Your Files.txt, ASCII 17->28 dropped 30 10 other malicious files 17->30 dropped 52 System process connects to network (likely due to code injection or exploit) 17->52 54 Connects to many different private IPs via SMB (likely to spread or exploit) 17->54 56 Connects to many different private IPs (likely to spread or exploit) 17->56 58 3 other signatures 17->58 file11 signatures12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/7aa4903001e55982d11c76c178d9006aaaf137c5a941067cc6bf1b91edde62a1/
Threat name:
Win64.Trojan.Synder
Create hunting rule
Status:
Malicious
First seen:
2023-08-29 13:50:57 UTC
File Type:
PE+ (Exe)
Extracted files:
3
AV detection:
10 of 24 (41.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=pksjamab4vmyfui4o3axrwiankvpcn6fvfaqm7ggx4nzd3o6mkqq._file
Verdict:
malicious
Similar samples:
04b99b0b9a0e98d04478003c86bf4fa3d20c56313c716b62e7be74ae7b95bf70
KnightCrypt
0701df6ec96aaea2af21707445fdfd8812dd8b7c7e695b920eedca205518826c
KnightCrypt
66871cebfa92f04476679fb3b00a125f7eb43ea35cfb8b187b4aa2bbd0230c10
KnightCrypt
6ae637c07dea5f9186ac3e6090664fdbcf8523fe82a8a94d70ca2cf69db630e1
KnightCrypt
b287c0bc239b434b90eef01bcbd00ff48192b7cbeb540e568b8cdcdc26f90959
KnightCrypt
e62d6e57a7ab153771d9c550062cc67f6d5befcc52286bd6f1543201f7088acd
KnightCrypt
e6ea06c6f7b53007e854e986734e79bb0dd84680611e9a3ee9e586cc7a964bd2
KnightCrypt
e728a9ec09d7e49171144459b742ee41dabaf206970d2a2260694204cd1f5161
KnightCrypt
fa70210641dbdb01ebd60ff4b1e39efeeaa16d4570ef97f9f20824f5adb7d43c
KnightCrypt
+ 3 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  10/10
Tags:
ransomware
Link:
https://tria.ge/reports/230829-1g2afsgb26/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Drops desktop.ini file(s)
Enumerates connected drives
Renames multiple (180) files with added filename extension
Unpacked files
SH256 hash:
7aa4903001e55982d11c76c178d9006aaaf137c5a941067cc6bf1b91edde62a1
MD5 hash:
08c16ed985828b4b6d70a5ffda6abc60
SHA1 hash:
9a23ea86a1d8ef5d197b90c3153f3896a651517c
Link:
https://www.unpac.me/results/b2aca84a-9d22-4773-878d-e3b6625d502e/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/7aa4903001e5/report/overview.html
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/7aa4903001e55982d11c76c178d9006aaaf137c5a941067cc6bf1b91edde62a1

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.

Web download

KnightCrypt

Executable exe 7aa4903001e55982d11c76c178d9006aaaf137c5a941067cc6bf1b91edde62a1

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/2708103/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/445156/

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