MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fc330820899d3b38c7267818e1603b11c5e66b93a7ff5ec649f2ce033c1e3b66. 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


Stealc


Vendor detections: 18


Intelligence 18 IOCs YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fc330820899d3b38c7267818e1603b11c5e66b93a7ff5ec649f2ce033c1e3b66
SHA3-384 hash: 15eac75c6a60df57fbdc0461b66e6e0c3c30b7e863db51f3f2f676bd2753c19b72bf00d6b2c7710af59298dad7c7883e
SHA1 hash: f5fe23f6ccb233ddff4b77dc356b01c1c2fc5983
MD5 hash: d22f922c9b6e07fc161e1367264e29d8
humanhash: virginia-colorado-bulldog-arkansas
File name:ramos.exe
Download: download sample
Signature Stealc
Create hunting rule
File size:211'496 bytes
First seen:2024-08-11 21:25:51 UTC
Last seen:2024-08-11 22:22:25 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 3072:cPa5ECm4gXI65Dk25H3VZISd3j9d0h74X3f7AOi9A82aHFIxiIOuCheHkLXOTKYp:yhlI5293VZIw3JM7U3f1raHFIpURLGEO
TLSH T16D2412F203F6A22AC8B749F1F690D15A1D70A1637397C97620DEC6F98E32B50496C379
TrID 67.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.7% (.EXE) Win64 Executable (generic) (10523/12/4)
6.0% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.1% (.EXE) Win32 Executable (generic) (4504/4/1)
Reporter aachum
Tags:exe Stealc


Avatar
iamaachum
185.215.113.16/lava/ramos.exe

StealC C2: http://185.215.113.100/e2b1563c6670f193.php

Intelligence

File Origin
# of uploads :
4
# of downloads :
348
Origin country :
ES ES
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
ramos.exe
Verdict:
Malicious activity
Analysis date:
2024-08-11 21:27:52 UTC
Tags:
stealer stealc loader
Link:
https://app.any.run/tasks/18649eae-fe36-4f9f-a751-2aeaf1df570e

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Win32.PWSX-gen.25277.27283.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66b92c6baa5b40be0aa00696
Tags:
Encryption Static
Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a file
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Connection attempt to an infection source
Unauthorized injection to a system process
Sending an HTTP GET request to an infection source
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
overlay packed
Link:
https://www.filescan.io/uploads/66b92c6ae565ee98cf3ec92d/reports/0fda3845-994f-4618-80a9-602e8fd6557e/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/fc330820899d3b38c7267818e1603b11c5e66b93a7ff5ec649f2ce033c1e3b66
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:
Stealc
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/eecd4915-9a7b-4015-8039-ebf2394068c1
Result
Threat name:
Stealc, Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1491298
Signature
.NET source code contains very large array initializations
AI detected suspicious sample
Allocates memory in foreign processes
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Contains functionality to inject code into remote processes
Found evasive API chain (may stop execution after checking locale)
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Injects a PE file into a foreign processes
Machine Learning detection for sample
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Sample uses string decryption to hide its real strings
Searches for specific processes (likely to inject)
Tries to harvest and steal Bitcoin Wallet information
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to steal Crypto Currency Wallets
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected Powershell download and execute
Yara detected Stealc
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1491298 Sample: ramos.exe Startdate: 11/08/2024 Architecture: WINDOWS Score: 100 28 171.39.242.20.in-addr.arpa 2->28 32 Multi AV Scanner detection for domain / URL 2->32 34 Found malware configuration 2->34 36 Antivirus detection for URL or domain 2->36 38 10 other signatures 2->38 7 ramos.exe 1 2->7         started        signatures3 process4 file5 18 C:\Users\user\AppData\Local\...\ramos.exe.log, ASCII 7->18 dropped 40 Contains functionality to inject code into remote processes 7->40 42 Writes to foreign memory regions 7->42 44 Allocates memory in foreign processes 7->44 46 Injects a PE file into a foreign processes 7->46 11 RegAsm.exe 34 7->11         started        16 RegAsm.exe 7->16         started        signatures6 process7 dnsIp8 30 185.215.113.100, 49707, 80 WHOLESALECONNECTIONSNL Portugal 11->30 20 C:\ProgramData\nss3.dll, PE32 11->20 dropped 22 C:\Users\user\AppData\...\vcruntime140[1].dll, PE32 11->22 dropped 24 C:\Users\user\AppData\...\softokn3[1].dll, PE32 11->24 dropped 26 9 other files (none is malicious) 11->26 dropped 48 Tries to steal Mail credentials (via file / registry access) 11->48 50 Found many strings related to Crypto-Wallets (likely being stolen) 11->50 52 Tries to harvest and steal ftp login credentials 11->52 58 3 other signatures 11->58 54 Found evasive API chain (may stop execution after checking locale) 16->54 56 Searches for specific processes (likely to inject) 16->56 file9 signatures10
Score:
92%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/fc330820899d3b38c7267818e1603b11c5e66b93a7ff5ec649f2ce033c1e3b66
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fc330820899d3b38c7267818e1603b11c5e66b93a7ff5ec649f2ce033c1e3b66/
Threat name:
ByteCode-MSIL.Trojan.StealC
Create hunting rule
Status:
Malicious
First seen:
2024-08-11 21:26:11 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
23 of 24 (95.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7qzqqiejtu5trrzgpamocyb3chc6m24tu77v5rsj6lhagpa6hnta._file
Verdict:
malicious
Result
Malware family:
stealc
Create hunting rule
Score:
  10/10
Tags:
family:stealc botnet:kora discovery stealer
Link:
https://tria.ge/reports/240811-z96j7sygkr/
Behaviour
Suspicious use of WriteProcessMemory
Program crash
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Stealc
Malware Config
C2 Extraction:
http://185.215.113.100
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/9a65509c-8b20-4980-b26d-d0c521c053fa
Unpacked files
SH256 hash:
37257ddb1a6f309a6e9d147b5fc2551a9cae3a0e52b191b18d9465bfcb5c18eb
MD5 hash:
278ee1426274818874556aa18fd02e3a
SHA1 hash:
185a2761330024dec52134df2c8388c461451acb
Detections:
stealc
Create hunting rule
Link:
https://www.unpac.me/results/b9f80f6b-715e-4543-a789-5a8d3fe75540/
Parent samples :
37257ddb1a6f309a6e9d147b5fc2551a9cae3a0e52b191b18d9465bfcb5c18eb
fc330820899d3b38c7267818e1603b11c5e66b93a7ff5ec649f2ce033c1e3b66
853abd09d09a18a6a9e41f208dd45409f94fe1823eb94dedc1df28f68c9ef0c6
062f57bb9fc936ebb60a9d6862ac59c89b9dda88150d75143c5994a1c2151af9
a495a730cbb5eaa4bca30fe6dad501e7c8d2aeb1754b5686a8f94619c5e5c313
f42a16db7490876328b155b2dbb963ac8012c28963fafae0049530e15461c1e4
SH256 hash:
fc330820899d3b38c7267818e1603b11c5e66b93a7ff5ec649f2ce033c1e3b66
MD5 hash:
d22f922c9b6e07fc161e1367264e29d8
SHA1 hash:
f5fe23f6ccb233ddff4b77dc356b01c1c2fc5983
Link:
https://www.unpac.me/results/b9f80f6b-715e-4543-a789-5a8d3fe75540/
Malware family:
Stealc
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/fc330820899d/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/fc330820899d3b38c7267818e1603b11c5e66b93a7ff5ec649f2ce033c1e3b66

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:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_imphash
Create hunting rule
Rule name:PE_Potentially_Signed_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Web download

Stealc

Executable exe fc330820899d3b38c7267818e1603b11c5e66b93a7ff5ec649f2ce033c1e3b66

(this sample)

  
Link
https://tria.ge/240811-z5hmksshjb
  
Dropped by
PrivateLoader
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3079150/
  
URLhaus
https://urlhaus.abuse.ch/url/3099831/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (GUARD_CF)high

Comments