MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 f8803ee53c63c55de0b2c1edec8cf5e03dfac5423eea4c4b81a5085685152c1e. 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
OskiStealer
Vendor detections: 11
| SHA256 hash: | f8803ee53c63c55de0b2c1edec8cf5e03dfac5423eea4c4b81a5085685152c1e |
|---|---|
| SHA3-384 hash: | 0022d0e57142e06c2842ebceaf8186849c8ff2ae266ba13687ff91e626dda717ac3491e2a3af06aa6227ec678f227348 |
| SHA1 hash: | 41fb38edbf12ef8a8045208b8874d091d9dfad68 |
| MD5 hash: | 3c977d476dc54e6fbd498f078d2aa0bf |
| humanhash: | indigo-asparagus-moon-table |
| File name: | NeworderWJO-002,pdf.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 649'728 bytes |
| First seen: | 2021-05-14 12:45:17 UTC |
| Last seen: | 2021-05-14 13:01:25 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger) |
| ssdeep | 12288:mL79sIfwv0lC57+Vf0cI5ma19UbLshe+NHP0AJcV7iIPgQC65y6lk:479sIYvpcI4sssXNHPjJcNPgMI |
| Threatray | 1'194 similar samples on MalwareBazaar |
| TLSH | 70D4F1233BE4C68CD5BE5B764521814483B1B657E623E71EAD0861AD8CB37C2C6173EB |
| Reporter |  abuse_ch |
| Tags: | exe OskiStealer |
Indicators Of Compromise (IOCs)
Below is a list of indicators of compromise (IOCs) associated with this malware samples.
| IOC | ThreatFox Reference |
|---|---|
| http://45.133.1.223/6.jpg | https://threatfox.abuse.ch/ioc/41037/ |
| http://45.133.1.223/1.jpg | https://threatfox.abuse.ch/ioc/41038/ |
| http://45.133.1.223/2.jpg | https://threatfox.abuse.ch/ioc/41039/ |
| http://45.133.1.223/3.jpg | https://threatfox.abuse.ch/ioc/41040/ |
| http://45.133.1.223/4.jpg | https://threatfox.abuse.ch/ioc/41041/ |
| http://45.133.1.223/5.jpg | https://threatfox.abuse.ch/ioc/41042/ |
| http://45.133.1.223/7.jpg | https://threatfox.abuse.ch/ioc/41043/ |
Intelligence
File Origin
# of uploads :
2
# of downloads :
112
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
NeworderWJO-002,pdf.exe
Verdict:
Malicious activity
Analysis date:
2021-05-14 12:50:24 UTC
Tags:
trojan stealer vidar loader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Vidar
Result
Verdict:
Malware
Maliciousness:
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
Oski Snake Keylogger Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
Allocates memory in foreign processes
Creates files in alternative data streams (ADS)
DLL side loading technique detected
Downloads files with wrong headers with respect to MIME Content-Type
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
May check the online IP address of the machine
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to steal Crypto Currency Wallets
Tries to steal Mail credentials (via file access)
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected Beds Obfuscator
Yara detected Oski Stealer
Yara detected Snake Keylogger
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Status:
Malicious
First seen:
2021-05-14 12:46:08 UTC
AV detection:
20 of 29 (68.97%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Similar samples:
+ 1'184 additional samples on MalwareBazaar
Result
Malware family:
oski
Score:
10/10
Tags:
family:oski infostealer spyware
Behaviour
Checks processor information in registry
Kills process with taskkill
NTFS ADS
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Loads dropped DLL
Downloads MZ/PE file
Executes dropped EXE
Oski
Malware Config
C2 Extraction:
45.133.1.223
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: | 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.
Comments
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MBC behaviors list (github.com/accidentalrebel/mbcscan):
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0) [C0027.001] Cryptography Micro-objective::AES::Encrypt Data