MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 e73c81b0befddfe58f2472dd3a2468d102caacc7cd71a7793b732efa3fdd05d1. 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
Efimer
Vendor detections: 9
| SHA256 hash: | e73c81b0befddfe58f2472dd3a2468d102caacc7cd71a7793b732efa3fdd05d1 |
|---|---|
| SHA3-384 hash: | 47c68b79b2f6bf6a7a0f8fe6d9b7545979de72d1e908db267de74b9de2cede8088cc6d420f5db0ebd940ad5ee5419bfe |
| SHA1 hash: | 9d0462015be177d700801a1316b8d983d80a4b2c |
| MD5 hash: | 78e88d6e7810b936cb1091a196685dcc |
| humanhash: | moon-oklahoma-september-oxygen |
| File name: | default.dat |
| Download: | download sample |
| Signature | Efimer |
| File size: | 14'313'040 bytes |
| First seen: | 2026-07-24 10:52:12 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | dcaf48c1f10b0efa0a4472200f3850ed (521 x Efimer, 60 x BlankGrabber, 23 x SalatStealer) |
| ssdeep | 393216:qg2QZc3Ftsi6vN9EYtMhXMCHWUjXCcuI3/PGTAI:qgzc3/sQRhXMb8X/H/O7 |
| TLSH | T17FE633482ED1167FDA728439EDA21946E4E1B4360733C9CF87A847A67F671E48D3D322 |
| TrID | 37.0% (.EXE) Win64 Executable (generic) (6522/11/2) 28.6% (.EXE) Win16 NE executable (generic) (5038/12/1) 11.5% (.EXE) OS/2 Executable (generic) (2029/13) 11.3% (.EXE) Generic Win/DOS Executable (2002/3) 11.3% (.EXE) DOS Executable (generic) (2000/1) |
| Magika | pebin |
| dhash icon | 71f0e4d4e6e4f070 (2 x Efimer) |
| Reporter |  aachum |
| Tags: | ClickFix Efimer exe |
Intelligence
File Origin
# of uploads :
1
# of downloads :
160
Origin country :
ESVendor Threat Intelligence
Malware configuration found for:
PyInstaller
Details
Detection:
n/a
Detection(s):
Result
Verdict:
Clean
Maliciousness:
Behaviour
Creating a file in the %temp% subdirectories
Restart of the analyzed sample
Creating a window
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
anti-debug expand installer-heuristic lolbin masquerade microsoft_visual_cc overlay packed packed packed pyinstaller reconnaissance
Verdict:
Malicious
Labled as:
Yogi.Generic
Verdict:
Malicious
File Type:
exe x64
First seen:
2026-07-24T08:06:00Z UTC
Last seen:
2026-07-26T02:10:00Z UTC
Hits:
~10
Verdict:
Unknown
Gathering data
Score:
100%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable PDB Path PE (Portable Executable) PE File Layout Win 64 Exe x64
Threat name:
Win64.Trojan.Yogi
Status:
Malicious
First seen:
2026-07-24 10:53:55 UTC
File Type:
PE+ (Exe)
Extracted files:
482
AV detection:
13 of 24 (54.17%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
n/a
Score:
8/10
Tags:
execution pyarmor pyinstaller
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Executes a command shell one-liner
Loads dropped DLL
Command and Scripting Interpreter: PowerShell
Unpacked files
SH256 hash:
e73c81b0befddfe58f2472dd3a2468d102caacc7cd71a7793b732efa3fdd05d1
MD5 hash:
78e88d6e7810b936cb1091a196685dcc
SHA1 hash:
9d0462015be177d700801a1316b8d983d80a4b2c
SH256 hash:
05a1c88bf7fc3d0a8bc2a0f4d762c38891b354735812574d63b7960c6f6e7d02
MD5 hash:
56cab12d3698acec8f2c4cb59c7e739a
SHA1 hash:
f5a6d9b32c450c596616caa5f545a06ff2f33e69
SH256 hash:
36585912e5eaf83ba9fea0631534f690ccdc2d7ba91537166fe53e56c221e153
MD5 hash:
862f820c3251e4ca6fc0ac00e4092239
SHA1 hash:
ef96d84b253041b090c243594f90938e9a487a9a
SH256 hash:
a5c6a329698490a035133433928d04368ce6285bb91a9d074fc285de4c9a32a4
MD5 hash:
16855ebef31c5b1ebe767f1c617645b3
SHA1 hash:
315521f3a748abfa35cd4d48e8dd09d0556d989b
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: | DebuggerCheck__API |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DebuggerException__SetConsoleCtrl |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | Detect_PyInstaller |
|---|---|
| Author: | Obscurity Labs LLC |
| Description: | Detects PyInstaller compiled executables across platforms |
| Rule name: | golang_bin_JCorn_CSC846 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| Rule name: | PyInstaller |
|---|---|
| Author: | @bartblaze |
| Description: | Identifies executable converted using PyInstaller. This rule by itself does NOT necessarily mean the detected file is malicious. |
| Rule name: | TH_AntiVM_MassHunt_Win_Malware_2026_CYFARE |
|---|---|
| Author: | CYFARE |
| Description: | Detects Windows malware employing anti-VM / anti-sandbox evasion techniques across VMware, VirtualBox, Hyper-V, QEMU, Xen, and generic sandbox environments |
| Reference: | https://cyfare.net/ |
| Rule name: | upxHook |
|---|---|
| Author: | @r3dbU7z |
| Description: | Detect artifacts from 'upxHook' - modification of UPX packer |
| Reference: | https://bazaar.abuse.ch/sample/6352be8aa5d8063673aa428c3807228c40505004320232a23d99ebd9ef48478a/ |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Web download
Delivery method
Distributed via web download
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