MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 fd16c60e634e807f6bbb7c3e6e12a4231b7b34851eb98d6da2f178b6125c536f. 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: 12
| SHA256 hash: | fd16c60e634e807f6bbb7c3e6e12a4231b7b34851eb98d6da2f178b6125c536f |
|---|---|
| SHA3-384 hash: | 15d38efa1265b28d94312b607c2784dc1cc3c447adb8f4850a712e5148890778975d143c1e91e0de67a3db4d580f2751 |
| SHA1 hash: | a75840830a4a95f779809f4d52ad7328de9e4c6f |
| MD5 hash: | 3c0aae14c733b8f3b5f15d3f066e343d |
| humanhash: | washington-jersey-music-violet |
| File name: | Doc_PO-8122021-753.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 1'124'352 bytes |
| First seen: | 2021-08-16 14:59:28 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'741 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger) |
| ssdeep | 12288:O/8XZuGwgtGb74uChgDCe83dHY3XJEkKBiy8CalBmNWab9UXvBJZQ63GvIZDgQ:O/g5g74nGDCJxWXSfBihmECSfBJ |
| Threatray | 2'601 similar samples on MalwareBazaar |
| TLSH | T17835703C29FD263FC0A6D675CBE28C13B00168AF7121AD5594C7172E532AA5376C72BE |
| dhash icon | 70f0eab2e0ecf070 (15 x AgentTesla, 9 x Loki, 7 x Formbook) |
| Reporter |  malwarelabnet |
| Tags: | exe oski OskiStealer |
Intelligence
File Origin
# of uploads :
1
# of downloads :
134
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Vidar
Result
Verdict:
Malware
Maliciousness:
Behaviour
DNS request
Creating a window
Sending a UDP request
Launching the default Windows debugger (dwwin.exe)
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.
Malware family:
Oski Stealer
Verdict:
Malicious
Result
Threat name:
Oski Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
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
Machine Learning detection for sample
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
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 steal Crypto Currency Wallets
Yara detected AntiVM3
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Status:
Malicious
First seen:
2021-08-13 08:02:05 UTC
AV detection:
23 of 28 (82.14%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Similar samples:
+ 2'591 additional samples on MalwareBazaar
Result
Malware family:
oski
Score:
10/10
Tags:
family:oski discovery infostealer spyware stealer suricata
Behaviour
Checks processor information in registry
Kills process with taskkill
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Deletes itself
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Oski
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
Malware Config
C2 Extraction:
kckark.xyz
Unpacked files
SH256 hash:
a2b01aecd59adae815adeea7acd1f3c249bab5da12e01d10708f7807c0acc41b
MD5 hash:
54297cfa996149b0305b8c0777f42cc1
SHA1 hash:
ab164f3f32c6762dabb8b3322ebd757c8832e28c
SH256 hash:
33ac6b8012ce739e72022086b5d39b7fc030c20fa72988f76957685509d5c041
MD5 hash:
83f8ae95a7e6f016f6b00482588086e6
SHA1 hash:
70392939d6d60a913b51084ec1d98eaae8ca4868
SH256 hash:
f627dc3b869d2e6cdbae8384fd2a8b6a0f09a678dc95306f38f32614be6d6856
MD5 hash:
192515ef7d44c00aebbc7e4802c43a86
SHA1 hash:
6fb2671bb37fc9e7cd49e564be88dd92ef956acf
Detections:
win_oski_g0
win_oski_auto
SH256 hash:
fd16c60e634e807f6bbb7c3e6e12a4231b7b34851eb98d6da2f178b6125c536f
MD5 hash:
3c0aae14c733b8f3b5f15d3f066e343d
SHA1 hash:
a75840830a4a95f779809f4d52ad7328de9e4c6f
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: | 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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