MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 aff20c28bd7188b03932a3ca44c307de9df1ec97c69d41ff3c6153e31d077b47. 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: 14


Intelligence 14 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: aff20c28bd7188b03932a3ca44c307de9df1ec97c69d41ff3c6153e31d077b47
SHA3-384 hash: e2839b66851e44b2ce9c79c0537a95bb2d7789fa83b8044d9391170dfd0d2acb9af4df901f6ec130d129736a216bf6e9
SHA1 hash: d5e6f7bffb60fa6f231bee4763a331ee24b6ff7c
MD5 hash: 57a80d7e7f4ed41e5bb11364220136d5
humanhash: mississippi-eighteen-west-snake
File name:file
Download: download sample
Signature Stealc
Create hunting rule
File size:2'475'008 bytes
First seen:2024-07-15 22:50:36 UTC
Last seen:2024-07-24 17:54:31 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 001806c33a6e9fe5fbff34bdbd79b591 (112 x Stealc, 9 x MarsStealer, 1 x Amadey)
ssdeep 49152:CaPzQMiYR361Fvh0LH+D9xQjgCEMVEMDyOeAZOaONpQ+Z/Pj+EXFqhxYSp3ENE:CaPsrYRKrhAHS9YgCEMVEk9ONyVEXkzZ
TLSH T1A0B5332947483F92E491F7B3F0834A296CBB3C5CBC69F185784F292545BDE1CBA29835
TrID 27.1% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
20.8% (.EXE) Win16 NE executable (generic) (5038/12/1)
18.6% (.EXE) Win32 Executable (generic) (4504/4/1)
8.5% (.ICL) Windows Icons Library (generic) (2059/9)
8.3% (.EXE) OS/2 Executable (generic) (2029/13)
Reporter Bitsight
Tags:exe Stealc


Avatar
Bitsight
url: http://77.91.77.81/stealc/random.exe

Intelligence

File Origin
# of uploads :
15
# of downloads :
386
Origin country :
US US
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
aff20c28bd7188b03932a3ca44c307de9df1ec97c69d41ff3c6153e31d077b47.exe
Verdict:
Malicious activity
Analysis date:
2024-07-15 22:53:34 UTC
Tags:
stealer stealc
Link:
https://app.any.run/tasks/bb5ff08d-ee2f-483a-93bb-4e543ea90827

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
PUA.Win.Packer.EnigmaProtector-9852682-0
Create hunting rule

Verdict:
Clean
Score:
99.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6695a7d784e955866872b95cwin7simulatehigh_evasion
Tags:
n/a
Result
Verdict:
Malware
Maliciousness:

Behaviour
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Launching a process
Connection attempt to an infection source
Sending an HTTP GET request to an infection source
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
enigma lolbin microsoft_visual_cc packed packed shell32
Link:
https://www.filescan.io/uploads/6695a7d74cee8c9113b65371/reports/1b0f9ac5-187a-4155-9811-585da2c5df5d/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/aff20c28bd7188b03932a3ca44c307de9df1ec97c69d41ff3c6153e31d077b47
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:
Malicious
Link:
https://analyze.intezer.com/analyses/b74aa5fe-19ee-472f-bc79-c8256196222c
Result
Threat name:
Amadey, Mars Stealer, Stealc, Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1473915
Signature
AI detected suspicious sample
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
Binary is likely a compiled AutoIt script file
C2 URLs / IPs found in malware configuration
Detected unpacking (changes PE section rights)
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Hides threads from debuggers
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
PE file contains section with special chars
PE file has nameless sections
Sample uses string decryption to hide its real strings
Snort IDS alert for network traffic
Tries to detect process monitoring tools (Task Manager, Process Explorer etc.)
Tries to detect sandboxes / dynamic malware analysis system (registry check)
Tries to detect sandboxes and other dynamic analysis tools (window names)
Tries to detect virtualization through RDTSC time measurements
Tries to evade debugger and weak emulator (self modifying code)
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)
Yara detected Amadeys stealer DLL
Yara detected Mars stealer
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: 1473915 Sample: file.exe Startdate: 16/07/2024 Architecture: WINDOWS Score: 100 73 youtube-ui.l.google.com 2->73 75 www.youtube.com 2->75 77 33 other IPs or domains 2->77 103 Snort IDS alert for network traffic 2->103 105 Found malware configuration 2->105 107 Antivirus detection for URL or domain 2->107 109 16 other signatures 2->109 11 file.exe 37 2->11         started        16 explorti.exe 2->16         started        18 explorti.exe 2->18         started        20 firefox.exe 2->20         started        signatures3 process4 dnsIp5 85 85.28.47.30, 49710, 49726, 80 GES-ASRU Russian Federation 11->85 87 77.91.77.81, 49713, 49725, 49728 FOTONTELECOM-TRANSIT-ASFOTONTELECOMISPRU Russian Federation 11->87 55 C:\Users\user\AppData\...\CFBAFBFIEH.exe, PE32 11->55 dropped 57 C:\Users\user\AppData\...\softokn3[1].dll, PE32 11->57 dropped 59 C:\Users\user\AppData\Local\...\nss3[1].dll, PE32 11->59 dropped 61 12 other files (8 malicious) 11->61 dropped 111 Detected unpacking (changes PE section rights) 11->111 113 Tries to steal Mail credentials (via file / registry access) 11->113 115 Found many strings related to Crypto-Wallets (likely being stolen) 11->115 123 4 other signatures 11->123 22 cmd.exe 1 11->22         started        24 cmd.exe 2 11->24         started        117 Hides threads from debuggers 16->117 119 Tries to detect sandboxes / dynamic malware analysis system (registry check) 16->119 121 Tries to detect process monitoring tools (Task Manager, Process Explorer etc.) 16->121 26 firefox.exe 20->26         started        file6 signatures7 process8 dnsIp9 29 CFBAFBFIEH.exe 4 22->29         started        33 conhost.exe 22->33         started        35 conhost.exe 24->35         started        79 services.addons.mozilla.org 18.65.39.4, 443, 49814 MIT-GATEWAYSUS United States 26->79 81 youtube-ui.l.google.com 142.250.186.78, 443, 49756, 49757 GOOGLEUS United States 26->81 83 9 other IPs or domains 26->83 37 firefox.exe 26->37         started        39 firefox.exe 26->39         started        41 firefox.exe 26->41         started        process10 file11 71 C:\Users\user\AppData\Local\...\explorti.exe, PE32 29->71 dropped 133 Antivirus detection for dropped file 29->133 135 Detected unpacking (changes PE section rights) 29->135 137 Machine Learning detection for dropped file 29->137 139 5 other signatures 29->139 43 explorti.exe 19 29->43         started        signatures12 process13 dnsIp14 89 77.91.77.82, 49724, 49727, 49729 FOTONTELECOM-TRANSIT-ASFOTONTELECOMISPRU Russian Federation 43->89 63 C:\Users\user\AppData\...\4d2188bd3a.exe, PE32 43->63 dropped 65 C:\Users\user\AppData\...\33b41628e8.exe, PE32 43->65 dropped 67 C:\Users\user\AppData\Local\...\random[1].exe, PE32 43->67 dropped 69 C:\Users\user\AppData\Local\...\random[1].exe, PE32 43->69 dropped 125 Antivirus detection for dropped file 43->125 127 Detected unpacking (changes PE section rights) 43->127 129 Tries to detect sandboxes and other dynamic analysis tools (window names) 43->129 131 5 other signatures 43->131 48 33b41628e8.exe 12 43->48         started        51 4d2188bd3a.exe 1 43->51         started        file15 signatures16 process17 signatures18 91 Antivirus detection for dropped file 48->91 93 Multi AV Scanner detection for dropped file 48->93 95 Detected unpacking (changes PE section rights) 48->95 97 Hides threads from debuggers 48->97 99 Binary is likely a compiled AutoIt script file 51->99 101 Machine Learning detection for dropped file 51->101 53 firefox.exe 51->53         started        process19
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/aff20c28bd7188b03932a3ca44c307de9df1ec97c69d41ff3c6153e31d077b47
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/aff20c28bd7188b03932a3ca44c307de9df1ec97c69d41ff3c6153e31d077b47/
Threat name:
Win32.Trojan.Stealc
Create hunting rule
Status:
Malicious
First seen:
2024-07-15 22:51:06 UTC
File Type:
PE (Exe)
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=v7zaykf5ogelaojsupfejqyh32o7d3exy2oud7z4mfj6ghihpndq._file
Verdict:
malicious
Result
Malware family:
stealc
Create hunting rule
Score:
  10/10
Tags:
family:amadey family:stealc botnet:4dd39d botnet:funny discovery evasion spyware stealer trojan
Link:
https://tria.ge/reports/240715-2ssywstaqr/
Behaviour
Checks processor information in registry
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Enumerates physical storage devices
Drops file in Windows directory
AutoIT Executable
Suspicious use of NtSetInformationThreadHideFromDebugger
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Checks BIOS information in registry
Checks computer location settings
Executes dropped EXE
Identifies Wine through registry keys
Loads dropped DLL
Reads data files stored by FTP clients
Reads user/profile data of web browsers
Downloads MZ/PE file
Identifies VirtualBox via ACPI registry values (likely anti-VM)
Amadey
Stealc
Malware Config
C2 Extraction:
http://85.28.47.30
http://77.91.77.82
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/a6d06e7b-1bfe-44dd-b9fb-3fa06182517e
Unpacked files
SH256 hash:
aff20c28bd7188b03932a3ca44c307de9df1ec97c69d41ff3c6153e31d077b47
MD5 hash:
57a80d7e7f4ed41e5bb11364220136d5
SHA1 hash:
d5e6f7bffb60fa6f231bee4763a331ee24b6ff7c
Link:
https://www.unpac.me/results/7e7797b6-fae9-425f-92b2-c48166e02129/
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/aff20c28bd7188b03932a3ca44c307de9df1ec97c69d41ff3c6153e31d077b47

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:maldoc_getEIP_method_1
Create hunting rule
Author:Didier Stevens (https://DidierStevens.com)

File information

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

Web download

Stealc

Executable exe aff20c28bd7188b03932a3ca44c307de9df1ec97c69d41ff3c6153e31d077b47

(this sample)

  
Dropped by
Amadey
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2908698/
  
URLhaus
https://urlhaus.abuse.ch/url/2909131/
  
URLhaus
https://urlhaus.abuse.ch/url/2909129/

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 (HIGH_ENTROPY_VA)high
CHECK_NXMissing Non-Executable Memory Protectioncritical
Reviews
IDCapabilitiesEvidence
SHELL_APIManipulates System Shellshell32.dll::ShellExecuteA
WIN_BASE_APIUses Win Base APIkernel32.dll::LoadLibraryA
WIN_BASE_IO_APICan Create Filesversion.dll::GetFileVersionInfoA

Comments