MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 ef99ea97c4c73ddaecd5e1dd916c4ad2be4ad57313df192e245d992f6b6f363d. 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
Expiro
Vendor detections: 18
| SHA256 hash: | ef99ea97c4c73ddaecd5e1dd916c4ad2be4ad57313df192e245d992f6b6f363d |
|---|---|
| SHA3-384 hash: | edeec40a6aa3f459ba628afb9b81bcd977ae4482579d8ea56b554b5388b594b866829dcaddae78ba462e6ba118f0f4a0 |
| SHA1 hash: | 39aa99ffe8442ec3ff1918834902abb8398e283d |
| MD5 hash: | 03d937fffd1812da9ba7d282322059eb |
| humanhash: | violet-hydrogen-oven-saturn |
| File name: | TransportLabel_8026772448.exe |
| Download: | download sample |
| Signature | Expiro |
| File size: | 1'397'760 bytes |
| First seen: | 2025-10-17 12:47:00 UTC |
| Last seen: | 2025-11-06 10:45:36 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger) |
| ssdeep | 24576:t07AfxAjt6j0C2wzBFJFhnF4Q7hL8GAaUQYzCxPk75+onR:t0AxAjt64C2wzLJFD4Q7hLm5QW6PC59R |
| Threatray | 746 similar samples on MalwareBazaar |
| TLSH | T1305523084542F387DA0A17B11A72F1B11B38AFDAF621F6279EDE3CDB75A9F104C05692 |
| TrID | 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 10.2% (.EXE) Win64 Executable (generic) (10522/11/4) 6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.3% (.EXE) Win32 Executable (generic) (4504/4/1) 2.0% (.ICL) Windows Icons Library (generic) (2059/9) |
| Magika | pebin |
| Reporter |  James_inthe_box |
| Tags: | exe Expiro |
Intelligence
File Origin
# of uploads :
2
# of downloads :
100
Origin country :
USVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
TransportLabel_8026772448.exe
Verdict:
Malicious activity
Analysis date:
2025-10-17 12:47:43 UTC
Tags:
m0yv sinkhole darkcloud
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
DarkCloud
Verdict:
Malicious
Score:
99.9%
Tags:
dropper virus msil
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Creating a process with a hidden window
Launching a process
Creating a file
Сreating synchronization primitives
Creating a file in the %AppData% directory
Modifying a system executable file
Launching a service
Creating a file in the %AppData% subdirectories
Reading critical registry keys
Searching for synchronization primitives
Loading a system driver
Sending a custom TCP request
Creating a file in the system32 subdirectories
Connection attempt to an infection source
Modifying an executable file
Modifying a system file
Creating a file in the Windows subdirectories
Using the Windows Management Instrumentation requests
Enabling autorun for a service
Stealing user critical data
Query of malicious DNS domain
Adding an exclusion to Microsoft Defender
Unauthorized injection to a system process
Infecting executable files
Sending an HTTP POST request to an infection source
Sending an HTTP GET request to an infection source
Verdict:
Suspicious
Threat level:
5/10
Confidence:
100%
Tags:
masquerade packed
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-10-16T14:07:00Z UTC
Last seen:
2025-10-19T11:00:00Z UTC
Hits:
~1000
Detections:
Trojan.Agent.HTTP.C&C Trojan-PSW.Win32.Stelega.sb Trojan.MSIL.Taskun.sb Trojan.Kryplod.UDP.C&C PDM:Trojan.Win32.Generic HEUR:Virus.Win32.Generic HEUR:Trojan.Win64.Kryplod.pef Trojan.MSIL.Crypt.sb HEUR:Trojan-PSW.MSIL.Agensla.gen Virus.Win64.Moiva.a Virus.Win32.Moiva.a Trojan-PSW.Win32.Stealer.sb Trojan-PSW.Win32.DarkCloud.sb Trojan.Agentb.UDP.ServerRequest
Malware family:
Agent Tesla
Verdict:
Malicious
Score:
100%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.45 Win 32 Exe x86
Verdict:
Malicious
Threat:
Family.DARKCLOUD
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Status:
Malicious
First seen:
2025-10-16 19:06:24 UTC
File Type:
PE (.Net Exe)
Extracted files:
12
AV detection:
25 of 37 (67.57%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
unc_loader_037
darkcloudstealer
Similar samples:
+ 736 additional samples on MalwareBazaar
Result
Malware family:
darkcloud
Score:
10/10
Tags:
family:darkcloud discovery execution ransomware spyware stealer
Behaviour
Checks SCSI registry key(s)
Checks processor information in registry
Modifies data under HKEY_USERS
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: LoadsDriver
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Volume Shadow Copy service COM API
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Drops file in Windows directory
Drops file in System32 directory
Suspicious use of SetThreadContext
Enumerates connected drives
Checks computer location settings
Executes dropped EXE
Reads user/profile data of web browsers
Command and Scripting Interpreter: PowerShell
DarkCloud
Darkcloud family
Verdict:
Unknown
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
ef99ea97c4c73ddaecd5e1dd916c4ad2be4ad57313df192e245d992f6b6f363d
MD5 hash:
03d937fffd1812da9ba7d282322059eb
SHA1 hash:
39aa99ffe8442ec3ff1918834902abb8398e283d
SH256 hash:
9caa062d6a84e29b7d9b4c7a129a7bd5f65712b83108239091b26be1abdb9053
MD5 hash:
5c1db73699f3ef958082e72a272d2379
SHA1 hash:
991286efd75f315b22bf73b473802a4785ca8261
SH256 hash:
1b2346a25ca678e2c29e31f9d3fd20849c45d2ea8242db97908dfc685584c841
MD5 hash:
491dcec372dd0e204c4d684d320d5c9f
SHA1 hash:
5bc0f0af3b665cad795541dabc6de2082f67cd09
Detections:
INDICATOR_SUSPICIOUS_Binary_References_Browsers
INDICATOR_SUSPICIOUS_EXE_SQLQuery_ConfidentialDataStore
INDICATOR_SUSPICIOUS_EXE_TelegramChatBot
MALWARE_Win_A310Logger
MALWARE_Win_DarkCloud
SH256 hash:
c116f5588acbd08feb0b9c40d814b9d6ba30fed15d0435ba3f122d847a2f54ec
MD5 hash:
19eeb0ed4808127c15a2044f2edbda51
SHA1 hash:
a7d035c97bd8c5ed50b316a9f08681dcbcffb0f6
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
SUSP_OBF_NET_Reactor_Indicators_Jan24
SH256 hash:
b6781edd819929c2fe8b41985314c4eaed3c35ce05a61cdf911da3f09de53074
MD5 hash:
69fe9dc75c1792830f0a6d2525d05b22
SHA1 hash:
ae712836721804406194a813b91c7dd9f122d28c
SH256 hash:
abdd6f31a909b0b10e30ced74a1f6f037adf1f61a8a842048dbc254d6f076169
MD5 hash:
c33a7f0e25bb3f4d3c19fc8441e9d12b
SHA1 hash:
0286b277e97b9f7c217a0d029e8144f8e20b40b9
Malware family:
DarkCloud
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: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | pe_imphash |
|---|
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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