MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 c5837dc167fdf9498d4d9784b9c991d1499123fb336b3414b00a6f0afdae8ac2. 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
Cosmu
Vendor detections: 13
| SHA256 hash: | c5837dc167fdf9498d4d9784b9c991d1499123fb336b3414b00a6f0afdae8ac2 |
|---|---|
| SHA3-384 hash: | e769e4e6b2c4c7b5f7d3139246660ff7ffaa450b302f768bfac7ede4811f27928f42b742c01405a6e3029b24e0bfb4c0 |
| SHA1 hash: | 4a8e4df33b8c1b89aaa243759639eeb3f1116d6b |
| MD5 hash: | 1bdb1a11c5a812b6031ea267af9fcf3d |
| humanhash: | spaghetti-twenty-leopard-shade |
| File name: | WebInstaller.exe |
| Download: | download sample |
| Signature | Cosmu |
| File size: | 1'545'755 bytes |
| First seen: | 2026-06-05 17:45:35 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 5aa33c577ffd8431ff254de85dee5e7b (45 x Cosmu) |
| ssdeep | 6144:iFlKgzelZNQSBQGH/CSpWqTUoAXjiU4bz:lfBQGH6Sf4oAX+U4 |
| TLSH | T14865F1417EE2D8B3D0429A315CB68BA197377D13AA75D203F79D0B4B2E713849B7A312 |
| TrID | 50.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13) 10.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 10.5% (.EXE) Win64 Executable (generic) (6522/11/2) 8.1% (.EXE) Win16 NE executable (generic) (5038/12/1) 7.2% (.EXE) Win32 Executable (generic) (4504/4/1) |
| Magika | pebin |
| Reporter |  qemped |
| Tags: | Cosmu exe |
Intelligence
File Origin
# of uploads :
1
# of downloads :
127
Origin country :
IDVendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
c5837dc167fdf9498d4d9784b9c991d1499123fb336b3414b00a6f0afdae8ac2.zip
Verdict:
No threats detected
Analysis date:
2026-06-05 17:53:11 UTC
Tags:
arch-exec
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
99.9%
Tags:
teslacrypt cosmu
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a file
Modifying an executable file
Moving a recently created file
Creating a file in the %temp% directory
Enabling the 'hidden' option for recently created files
Creating a file in the Program Files subdirectories
Moving a file to the Program Files subdirectory
Replacing executable files
Infecting executable files
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug fingerprint installer-heuristic microsoft_visual_cc overlay packed reconnaissance
Verdict:
Malicious
Labled as:
Agent.NLP worm
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-06-05T14:31:00Z UTC
Last seen:
2026-06-05T14:47:00Z UTC
Hits:
~10
Detections:
HEUR:Virus.Win32.Generic HEUR:Trojan.Win32.Bingoml.gen
Malware family:
Emotet
Verdict:
Malicious
Score:
100%
Verdict:
Malware
File Type:
PE
Gathering data
Verdict:
Malicious
Threat:
Family.COSMU
Threat name:
Win32.Virus.Emdup
Status:
Malicious
First seen:
2026-06-05 17:46:18 UTC
File Type:
PE (Exe)
AV detection:
22 of 23 (95.65%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
cosmu
Score:
10/10
Tags:
family:cosmu discovery worm
Behaviour
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Enumerates connected drives
Detects Cosmu payload
Family: Cosmu
Unpacked files
SH256 hash:
c5837dc167fdf9498d4d9784b9c991d1499123fb336b3414b00a6f0afdae8ac2
MD5 hash:
1bdb1a11c5a812b6031ea267af9fcf3d
SHA1 hash:
4a8e4df33b8c1b89aaa243759639eeb3f1116d6b
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: | golang_bin_JCorn_CSC846 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| 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: | VECT_Ransomware |
|---|---|
| Author: | Mustafa Bakhit |
| Description: | Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments. |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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