MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 21be34122cdc4d173da4d143dd3d1930307086feabd72f6285f453d33e564337. 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
LummaStealer
Vendor detections: 15
| SHA256 hash: | 21be34122cdc4d173da4d143dd3d1930307086feabd72f6285f453d33e564337 |
|---|---|
| SHA3-384 hash: | 23eba77e0a2f1c4faa4089754da34b227e2a306dbcda5ec678c696cbcf58d45e8dcf390ec7fc09be40a5f6ceb9bb661e |
| SHA1 hash: | b876f5b34f55710be213606a090c14f47b016025 |
| MD5 hash: | e296fef4f52b909a14e9696ff9aff138 |
| humanhash: | beer-seven-arkansas-victor |
| File name: | CrystalUpd.exe |
| Download: | download sample |
| Signature | LummaStealer |
| File size: | 1'131'008 bytes |
| First seen: | 2025-07-19 13:50:57 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 3ede490b8d432fdd3ffdf674c3393047 (32 x LummaStealer, 3 x DarkCloud, 2 x Vidar) |
| ssdeep | 24576:bagOdyCGcoTMukPM0XnAd9MpSHQCfneL0XnAd9MpSHQCfneM:2gORPM0wgpSXGL0wgpSXGM |
| Threatray | 672 similar samples on MalwareBazaar |
| TLSH | T1B735F106E26155EAE87701B98562A546F877B8228730AFDF03D4E7320F177E06E3DB25 |
| TrID | 63.5% (.EXE) Win64 Executable (generic) (10522/11/4) 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) |
| Magika | pebin |
| Reporter |  abuse_ch |
| Tags: | exe LummaStealer |
Intelligence
File Origin
# of uploads :
1
# of downloads :
34
Origin country :
SEVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
CrystalUpd.exe
Verdict:
Malicious activity
Analysis date:
2025-07-18 19:09:28 UTC
Tags:
lumma stealer loader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Lumma
Verdict:
Malicious
Score:
70%
Tags:
malware
Result
Verdict:
Malware
Maliciousness:
Behaviour
Launching a process
Creating a window
Sending a custom TCP request
DNS request
Connection attempt
Behavior that indicates a threat
Forced shutdown of a system process
Query of malicious DNS domain
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
fingerprint microsoft_visual_cc obfuscated packed packed packer_detected similar-threat
Verdict:
Malicious
Labled as:
Lazy.Generic
Verdict:
Suspicious
Result
Threat name:
LummaC Stealer
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Signature
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Contains functionality to inject code into remote processes
Found malware configuration
Injects a PE file into a foreign processes
Multi AV Scanner detection for submitted file
Sample uses string decryption to hide its real strings
Sigma detected: Silenttrinity Stager Msbuild Activity
Suricata IDS alerts for network traffic
Writes to foreign memory regions
Yara detected LummaC Stealer
Behaviour
Behavior Graph:
Score:
100%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
4 match(es)
Tags:
Executable PE (Portable Executable) Win 64 Exe x64
Verdict:
Malicious
Threat:
Win64.PUA.Heuristic
Threat name:
Win64.Trojan.LummaStealer
Status:
Malicious
First seen:
2025-07-18 19:09:29 UTC
File Type:
PE+ (Exe)
AV detection:
19 of 24 (79.17%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
lummastealer
Similar samples:
+ 662 additional samples on MalwareBazaar
Result
Malware family:
lumma
Score:
10/10
Tags:
family:lumma discovery stealer
Behaviour
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Lumma Stealer, LummaC
Lumma family
Malware Config
C2 Extraction:
https://skdgh.top/riwq
https://gigohe.top/diau
https://unxyng.top/zpld
https://trbxlj.top/atiw
https://cooawbi.top/dpla
https://ourkbpw.top/aoti
https://gehkmx.top/xkaj
https://sacrp.top/amnt
https://dktnd.top/xuqi
https://gigohe.top/diau
https://unxyng.top/zpld
https://trbxlj.top/atiw
https://cooawbi.top/dpla
https://ourkbpw.top/aoti
https://gehkmx.top/xkaj
https://sacrp.top/amnt
https://dktnd.top/xuqi
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
21be34122cdc4d173da4d143dd3d1930307086feabd72f6285f453d33e564337
MD5 hash:
e296fef4f52b909a14e9696ff9aff138
SHA1 hash:
b876f5b34f55710be213606a090c14f47b016025
Please note that we are no longer able to provide a coverage score for Virus Total.
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: | DebuggerCheck__API |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | golang_bin_JCorn_CSC846 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| Rule name: | pe_detect_tls_callbacks |
|---|
| Rule name: | Sus_Obf_Enc_Spoof_Hide_PE |
|---|---|
| Author: | XiAnzheng |
| Description: | Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP) |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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
| ID | Title | Severity |
|---|---|---|
| CHECK_AUTHENTICODE | Missing Authenticode | high |
| CHECK_DLL_CHARACTERISTICS | Missing dll Security Characteristics (GUARD_CF) | high |
Reviews
| ID | Capabilities | Evidence |
|---|---|---|
| WIN32_PROCESS_API | Can Create Process and Threads | KERNEL32.dll::CloseHandle KERNEL32.dll::CreateThread |
| WIN_BASE_API | Uses Win Base API | KERNEL32.dll::TerminateProcess KERNEL32.dll::LoadLibraryExW KERNEL32.dll::GetSystemInfo KERNEL32.dll::GetStartupInfoW KERNEL32.dll::GetCommandLineA KERNEL32.dll::GetCommandLineW |
| WIN_BASE_EXEC_API | Can Execute other programs | KERNEL32.dll::WriteConsoleW KERNEL32.dll::FreeConsole KERNEL32.dll::ReadConsoleW KERNEL32.dll::SetStdHandle KERNEL32.dll::GetConsoleMode KERNEL32.dll::GetConsoleOutputCP |
| WIN_BASE_IO_API | Can Create Files | KERNEL32.dll::CreateFileW |
| WIN_USER_API | Performs GUI Actions | USER32.dll::CreateWindowExW |
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