MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 641ff2543a55742d8e7af6c7b072feab364f7416c6ede15a70d8eeba8191139e. 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: 11


Intelligence 11 IOCs 1 YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 641ff2543a55742d8e7af6c7b072feab364f7416c6ede15a70d8eeba8191139e
SHA3-384 hash: b7c0ddabd913a2a5a73b189f9e86c54b941bd68f1774fa390cfee0825153ade734f0f355f1d89fc924f35dd77e5bdcc2
SHA1 hash: 3335059898f1a8140446f0d15ce45a1126283053
MD5 hash: daa41374292b2331fd7b675c32e46a2e
humanhash: venus-gee-minnesota-idaho
File name:daa41374292b2331fd7b675c32e46a2e.exe
Download: download sample
Signature Stop
Create hunting rule
File size:886'784 bytes
First seen:2021-05-29 07:11:24 UTC
Last seen:2021-05-29 07:53:53 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash c8e47f7be4ebb5701228fea37e8d0168 (4 x Stop, 2 x ArkeiStealer, 1 x RaccoonStealer)
ssdeep 24576:ZGV4wva2qHe5jrT2adffEDdjlep7mVR6eUo+/SG:RwSP+6effw5QqVR33wS
Threatray 205 similar samples on MalwareBazaar
TLSH 0215F130AA95C034F0F252BEC679AA7D9D3A7DA35B6440CB13D53ADA66306D3AC31707
Reporter abuse_ch
Tags:exe Stop


Avatar
abuse_ch
Stop C2:
http://34.105.230.174/

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
http://34.105.230.174/ https://threatfox.abuse.ch/ioc/66374/

Intelligence

File Origin
# of uploads :
2
# of downloads :
307
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
daa41374292b2331fd7b675c32e46a2e.exe
Verdict:
Suspicious activity
Analysis date:
2021-05-29 07:12:15 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/19c12efd-6f24-4251-b776-9e2c6fe629c7

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/163135/
Detection(s):
SecuriteInfo.com.Trojan.GenericKDZ.75538.25522.16137.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a window
Unauthorized injection to a recently created process
DNS request
Sending a custom TCP request
Creating a file
Launching a process
Creating a process with a hidden window
Adding an access-denied ACE
Deleting a recently created file
Sending an HTTP GET request
Creating a process from a recently created file
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Enabling autorun by creating a file
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:
Djvu
Create hunting rule
Detection:
malicious
Classification:
rans.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/794198
Signature
Contains functionality to inject code into remote processes
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Found ransom note / readme
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Modifies existing user documents (likely ransomware behavior)
Multi AV Scanner detection for domain / URL
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: 426594 Sample: 1JRbvAKTT9.exe Startdate: 29/05/2021 Architecture: WINDOWS Score: 100 54 Multi AV Scanner detection for domain / URL 2->54 56 Multi AV Scanner detection for submitted file 2->56 58 Found ransom note / readme 2->58 60 2 other signatures 2->60 8 1JRbvAKTT9.exe 2->8         started        11 1JRbvAKTT9.exe 2->11         started        13 1JRbvAKTT9.exe 2->13         started        15 1JRbvAKTT9.exe 2->15         started        process3 signatures4 64 Detected unpacking (changes PE section rights) 8->64 66 Detected unpacking (overwrites its own PE header) 8->66 68 Contains functionality to inject code into remote processes 8->68 17 1JRbvAKTT9.exe 1 16 8->17         started        70 Injects a PE file into a foreign processes 11->70 21 1JRbvAKTT9.exe 19 11->21         started        72 Multi AV Scanner detection for dropped file 13->72 74 Machine Learning detection for dropped file 13->74 24 1JRbvAKTT9.exe 12 13->24         started        26 1JRbvAKTT9.exe 12 15->26         started        process5 dnsIp6 48 api.2ip.ua 77.123.139.190, 443, 49735, 49741 VOLIA-ASUA Ukraine 17->48 36 C:\Users\user\AppData\...\1JRbvAKTT9.exe, PE32 17->36 dropped 38 C:\Users\...\1JRbvAKTT9.exe:Zone.Identifier, ASCII 17->38 dropped 28 1JRbvAKTT9.exe 17->28         started        31 icacls.exe 17->31         started        50 asvb.top 35.235.74.220, 49747, 80 GOOGLEUS United States 21->50 40 C:\_readme.txt, ASCII 21->40 dropped 42 C:\Users\user\Desktop\IZMFBFKMEB.png, data 21->42 dropped 44 C:\Users\user\Desktop\...\DQOFHVHTMG.docx, data 21->44 dropped 46 2 other malicious files 21->46 dropped 62 Modifies existing user documents (likely ransomware behavior) 21->62 file7 signatures8 process9 signatures10 76 Injects a PE file into a foreign processes 28->76 33 1JRbvAKTT9.exe 12 28->33         started        process11 dnsIp12 52 api.2ip.ua 33->52
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/641ff2543a55742d8e7af6c7b072feab364f7416c6ede15a70d8eeba8191139e/
Threat name:
Win32.Ransomware.Convagent
Create hunting rule
Status:
Malicious
First seen:
2021-05-29 07:12:10 UTC
AV detection:
20 of 47 (42.55%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=mqp7evb2kv2c3dt263d3a4x6vm3e65awy3w6cwtq3dxlvamrcopa._file
Verdict:
malicious
Similar samples:
0463b38f5b4a592a808c730ee27a29607fab41971d5cbad604a1559f1cf460dd
Stop
59db1c1bc14d72ef225926c9d5a5a5a704d79b22b720e4e7884b2da2825c9203
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869bd0ca39150a6e0f87609ca7e927211ba9cf636b69c33c3cd09db85922dd94
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88a30fa4dee34a4249544734b5323f180ba725a8582226a5b891c43e81b2c395
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afc40ccbfe32719ae9b39ce16275f27400faefefcf207641d06b61ddde622011
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dcbea2abd13caac137cf4b0075f1631d7db9ddbcf11f09563f8b163e43191363
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e130228c8ed44ad5e8963c25b57e0f5186b6ef4dd00287e3505cb6be51369c82
Stop
+ 195 additional samples on MalwareBazaar
Result
Malware family:
raccoon
Create hunting rule
Score:
  10/10
Tags:
family:raccoon botnet:1d76a465540f6a904ac9f1310fe3a3824b5b4549 discovery evasion persistence ransomware spyware stealer
Link:
https://tria.ge/reports/210529-nrgvta5jh2/
Behaviour
Delays execution with timeout.exe
Modifies system certificate store
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Checks installed software on the system
Looks up external IP address via web service
Loads dropped DLL
Modifies file permissions
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Disables Task Manager via registry modification
Downloads MZ/PE file
Drops file in Drivers directory
Executes dropped EXE
Modifies extensions of user files
Deletes Windows Defender Definitions
Raccoon
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/641ff2543a55742d8e7af6c7b072feab364f7416c6ede15a70d8eeba8191139e

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:Email_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:INDICATOR_SUSPICIOUS_Binary_References_Browsers
Create hunting rule
Author:ditekSHen
Description:Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.
Rule name:INDICATOR_SUSPICIOUS_EXE_Referenfces_Messaging_Clients
Create hunting rule
Author:ditekSHen
Description:Detects executables referencing many email and collaboration clients. Observed in information stealers
Rule name:MALWARE_Win_Raccoon
Create hunting rule
Author:ditekSHen
Description:Detects Raccoon/Racealer infostealer
Rule name:MALWARE_Win_STOP
Create hunting rule
Author:ditekSHen
Description:Detects STOP ransomware
Rule name:SUSP_XORed_URL_in_EXE
Create hunting rule
Author:Florian Roth
Description:Detects an XORed URL in an executable
Reference:https://twitter.com/stvemillertime/status/1237035794973560834
Rule name:win_raccoon_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator

File information

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

Web download

Stop

Executable exe 641ff2543a55742d8e7af6c7b072feab364f7416c6ede15a70d8eeba8191139e

(this sample)

Cape
Cape
https://www.capesandbox.com/analysis/163135/
  
URLhaus
https://urlhaus.abuse.ch/url/1256494/
  
Delivery method
Distributed via web download

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