MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 d42b4e9bd0c54df09c9c1925b7eb41f6a877963ededdd0dd463e3d16dfe6cd5d. 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
RustyStealer
Vendor detections: 12
| SHA256 hash: | d42b4e9bd0c54df09c9c1925b7eb41f6a877963ededdd0dd463e3d16dfe6cd5d |
|---|---|
| SHA3-384 hash: | 61e43428803b0326a85a9d8645d6014c52c46016d3b0480e55f49e2e0fed8cf57f4487c8b465658e8f5524ceaeec2c2a |
| SHA1 hash: | 5b6596b52612dfc2b81f892f14d9f2b7eea3bd16 |
| MD5 hash: | b569a16bfa06be57b8902e291c6ac9ed |
| humanhash: | mango-sweet-lima-wyoming |
| File name: | holycat.exe |
| Download: | download sample |
| Signature | RustyStealer |
| File size: | 6'673'440 bytes |
| First seen: | 2025-11-27 12:26:43 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 75159da4c2d1c6aa321aaa87bffc5a7e (1 x RustyStealer) |
| ssdeep | 98304:OlEQxYuUFESkjTm98vjgdR6lHc7Nnva0Vn:OlEQ9jHji6lHE |
| TLSH | T1D7668D03E6A419EDCA9FD638C58E9336FB353C894236EBEB0564D7352D12A829F1C714 |
| TrID | 44.4% (.EXE) Win64 Executable (generic) (10522/11/4) 21.3% (.EXE) Win16 NE executable (generic) (5038/12/1) 8.7% (.ICL) Windows Icons Library (generic) (2059/9) 8.5% (.EXE) OS/2 Executable (generic) (2029/13) 8.4% (.EXE) Generic Win/DOS Executable (2002/3) |
| Magika | pebin |
| Reporter |  kernelv0id |
| Tags: | exe HolyCat Ransomware Rust RustyStealer |
Intelligence
File Origin
# of uploads :
1
# of downloads :
439
Origin country :
DEVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
holycat.exe
Verdict:
No threats detected
Analysis date:
2025-10-25 17:09:01 UTC
Tags:
discord
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Detection(s):
Verdict:
Malicious
Score:
90.2%
Tags:
injection obfusc virus
Result
Verdict:
Clean
Maliciousness:
Behaviour
DNS request
Connection attempt
Sending a custom TCP request
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
anti-debug base64 crypt crypto obfuscated overlay overlay packed packed ransomware vmprotect
Verdict:
Malicious
Labled as:
Trojan.Generic
Verdict:
Malicious
File Type:
exe x64
First seen:
2025-10-25T14:06:00Z UTC
Last seen:
2025-11-29T10:08:00Z UTC
Hits:
~10
Verdict:
Suspicious
Score:
98%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
4 match(es)
Tags:
Executable PE (Portable Executable) PE File Layout Win 64 Exe x64
Verdict:
Malicious
Threat:
Trojan-Ransom.Win64.Agent
Threat name:
Win64.Malware.Heuristic
Status:
Malicious
First seen:
2025-10-25 17:02:52 UTC
File Type:
PE+ (Exe)
AV detection:
20 of 36 (55.56%)
Threat level:
2/5
Detection(s):
Malicious file
Result
Malware family:
n/a
Score:
6/10
Tags:
ransomware
Behaviour
Sets desktop wallpaper using registry
Legitimate hosting services abused for malware hosting/C2
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
d42b4e9bd0c54df09c9c1925b7eb41f6a877963ededdd0dd463e3d16dfe6cd5d
MD5 hash:
b569a16bfa06be57b8902e291c6ac9ed
SHA1 hash:
5b6596b52612dfc2b81f892f14d9f2b7eea3bd16
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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: | command_and_control |
|---|---|
| Author: | CD_R0M_ |
| Description: | This rule searches for common strings found by malware using C2. Based on a sample used by a Ransomware group |
| Rule name: | CP_Script_Inject_Detector |
|---|---|
| Author: | DiegoAnalytics |
| Description: | Detects attempts to inject code into another process across PE, ELF, Mach-O binaries |
| Rule name: | dependsonpythonailib |
|---|---|
| Author: | Tim Brown |
| Description: | Hunts for dependencies on Python AI libraries |
| Rule name: | DetectEncryptedVariants |
|---|---|
| Author: | Zinyth |
| Description: | Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded |
| Rule name: | dsc |
|---|---|
| Author: | Aaron DeVera |
| Description: | Discord domains |
| Rule name: | FreddyBearDropper |
|---|---|
| Author: | Dwarozh Hoshiar |
| Description: | Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip. |
| Rule name: | golang_bin_JCorn_CSC846 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| Rule name: | INDICATOR_SUSPICIOUS_EXE_DiscordURL |
|---|---|
| Author: | ditekSHen |
| Description: | Detects executables Discord URL observed in first stage droppers |
| Rule name: | pe_detect_tls_callbacks |
|---|
| Rule name: | ProgramLanguage_Rust |
|---|---|
| Author: | albertzsigovits |
| Description: | Application written in Rust programming language |
| Rule name: | RANSOMWARE |
|---|---|
| Author: | ToroGuitar |
| Rule name: | reverse_http |
|---|---|
| Author: | CD_R0M_ |
| Description: | Identify strings with http reversed (ptth) |
| Rule name: | Rustyloader_mem_loose |
|---|---|
| Author: | James_inthe_box |
| Description: | Corroded buerloader |
| Reference: | https://app.any.run/tasks/83064edd-c7eb-4558-85e8-621db72b2a24 |
| Rule name: | SEH__vectored |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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