MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 2efc21de99c30e29a0f972ef4c1ded7a0fee92bcdbe8ea6c261aba3f43a795cf. 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
Threat unknown
Vendor detections: 9
| SHA256 hash: | 2efc21de99c30e29a0f972ef4c1ded7a0fee92bcdbe8ea6c261aba3f43a795cf |
|---|---|
| SHA3-384 hash: | 7c263a81100613f2f9c8fd6fb86873e6170309699106661b56fc157d4998acbe6d95e2d0cb4cc2228f228500dc21dd71 |
| SHA1 hash: | 4efdf57b8108ae266839ef74a146e5026a35f076 |
| MD5 hash: | b56ed0b812f066e5ce7d6dec37c864ff |
| humanhash: | friend-alanine-lion-april |
| File name: | utnttdvn |
| Download: | download sample |
| File size: | 2'037'748 bytes |
| First seen: | 2026-11-05 16:00:10 UTC |
| Last seen: | 2026-11-05 16:24:44 UTC |
| File type: | elf |
| MIME type: | application/x-executable |
| ssdeep | 49152:CTZ4rO2b/DSR+z3DUkgqt+uyNDU7cnTnyYNG5Y8tEL:WZ4rOKz30qtWMQyYNAWL |
| TLSH | T1469533D6C16D5C3A0F5BC29EB37A6201C8A4199E82E97CC8D06DB9CF5FB3409D9C5287 |
| TrID | 50.1% (.) ELF Executable and Linkable format (Linux) (4022/12) 49.8% (.O) ELF Executable and Linkable format (generic) (4000/1) |
| Magika | elf |
| Reporter |  abuse_ch |
| Tags: | elf UPX |
UPX packed
This file is packed with UPX. We have therefore unpacked the file. Below is furhter information about the unpacked (de-compressed) file.
| File size (compressed) : | 2'037'748 bytes |
|---|---|
| File size (de-compressed) : | 5'189'784 bytes |
| Format: | linux/i386 |
| Unpacked file: | 5adc75b946277b510d3b860eb5b730218808d3663a43cdbf48194f7bd73291da |
Intelligence
File Origin
# of uploads :
2
# of downloads :
76
Origin country :
DEVendor Threat Intelligence
Verdict:
Unknown
Threat level:
2.5/10
Confidence:
100%
Tags:
packed upx
Verdict:
Malicious
File Type:
elf.32.le
Status:
terminated
Behavior Graph:
Verdict:
Unknown
Result
Threat name:
n/a
Detection:
malicious
Classification:
troj.evad
Score:
80 / 100
Signature
Drops files in suspicious directories
Drops invisible ELF files
Executes the "crontab" command typically for achieving persistence
Modifies the '.bashrc' or '.bash_profile' file typically for persisting actions
Multi AV Scanner detection for submitted file
Protects files from modification
Sample is packed with UPX
Sample tries to persist itself using cron
Writes identical ELF files to multiple locations
Behaviour
Behavior Graph:
Threat name:
Linux.Trojan.Multiverze
Status:
Malicious
First seen:
2026-11-05 13:49:18 UTC
File Type:
ELF32 Little (Exe)
AV detection:
7 of 24 (29.17%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
n/a
Score:
7/10
Tags:
defense_evasion discovery execution linux persistence privilege_escalation upx
Behaviour
Enumerates kernel/hardware configuration
Reads runtime system information
System Network Configuration Discovery
Writes file to shm directory
Writes file to tmp directory
Reads system network configuration
Modifies Bash startup script
UPX packed file
Creates/modifies Cron job
Creates/modifies environment variables
Enumerates active TCP sockets
Enumerates running processes
Modifies init.d
Modifies systemd
Write file to user bin folder
Writes file to system bin folder
File and Directory Permissions Modification
Malware Family:
mirai
Malicious:
True
Tags:
persistence detect-debug-environment self-delete elf upx
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: | CP_Script_Inject_Detector |
|---|---|
| Author: | DiegoAnalytics |
| Description: | Detects attempts to inject code into another process across PE, ELF, Mach-O binaries |
| Rule name: | ELF_IoT_DVR_Botnet_Hama_UPX |
|---|---|
| Author: | Serhii Kocherhan |
| Description: | Detects packed and unpacked ELF IoT/DVR botnet variants targeting UPX compression structures and uncompressed code |
| Rule name: | exploit_any_poppopret |
|---|---|
| Author: | Jeff White [karttoon@gmail.com] @noottrak |
| Description: | Identify POP -> POP -> RET opcodes for quick ROP Gadget creation in target binaries. |
| Rule name: | GoBinTest |
|---|
| Rule name: | golang_binary_string |
|---|---|
| Description: | Golang strings present |
| Rule name: | ProgramLanguage_Golang |
|---|---|
| Author: | albertzsigovits |
| Description: | Application written in Golang programming language |
| Rule name: | SUSP_ELF_LNX_UPX_Compressed_File |
|---|---|
| Author: | Florian Roth (Nextron Systems) |
| Description: | Detects a suspicious ELF binary with UPX compression |
| Reference: | Internal Research |
| Rule name: | TH_Generic_MassHunt_Linux_Malware_2026_CYFARE |
|---|---|
| Author: | CYFARE |
| Description: | Generic Linux malware mass-hunt rule - 2026 |
| Reference: | https://cyfare.net/ |
| Rule name: | UPXProtectorv10x2 |
|---|---|
| Author: | malware-lu |
| Rule name: | upx_packed_elf_v1 |
|---|---|
| Author: | RandomMalware |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Web download
elf 2efc21de99c30e29a0f972ef4c1ded7a0fee92bcdbe8ea6c261aba3f43a795cf
(this sample)
Delivery method
Distributed via web download
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