MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 d9fa9a6d2f94da43ceb1e54df2cac4e099d6700ad52db757e5cbbece821e73d9. 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: 9
| SHA256 hash: | d9fa9a6d2f94da43ceb1e54df2cac4e099d6700ad52db757e5cbbece821e73d9 |
|---|---|
| SHA3-384 hash: | 3caaee74181d7fc624c194ed289abddf80293bc933bef92165082796ae4200e3c12a34966ba4b9cb6a43244d0e2c6055 |
| SHA1 hash: | db9efd2c26760ce555c1c31ca8d80d1731b26771 |
| MD5 hash: | 92d6baf79e990130a1db2175731d4e46 |
| humanhash: | winner-snake-crazy-item |
| File name: | d9fa9a6d2f94da43ceb1e54df2cac4e099d6700ad52db757e5cbbece821e73d9 |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 702'464 bytes |
| First seen: | 2021-08-24 22:50:39 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger) |
| ssdeep | 12288:PsIi50Ynk0H5sQH0YDMr1se/fRlA6EiNxcBO3XF02kLxEz33n5+mEJqyOx4:PtiKY/OQUwekXCcBmF3WS3Jta7O4 |
| TLSH | T16CE412881AE8553BC93DAD7CD0A6AB41C2F0C0A55283F3267EC8DDEE97857C81745B87 |
| Reporter |  AndreGironda |
| 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://ck7.mooo.com/6.jpg | https://threatfox.abuse.ch/ioc/194051/ |
| http://ck7.mooo.com/1.jpg | https://threatfox.abuse.ch/ioc/194052/ |
| http://ck7.mooo.com/2.jpg | https://threatfox.abuse.ch/ioc/194053/ |
| http://ck7.mooo.com/3.jpg | https://threatfox.abuse.ch/ioc/194054/ |
| http://ck7.mooo.com/4.jpg | https://threatfox.abuse.ch/ioc/194055/ |
| http://ck7.mooo.com/5.jpg | https://threatfox.abuse.ch/ioc/194056/ |
| http://ck7.mooo.com/7.jpg | https://threatfox.abuse.ch/ioc/194057/ |
Intelligence
File Origin
# of uploads :
1
# of downloads :
105
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
d9fa9a6d2f94da43ceb1e54df2cac4e099d6700ad52db757e5cbbece821e73d9
Verdict:
Malicious activity
Analysis date:
2021-08-24 22:52:16 UTC
Tags:
trojan stealer vidar loader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Sending a custom TCP request
Sending a UDP request
Unauthorized injection to a recently created process
Creating a file
DNS request
Connection attempt
Deleting a recently created file
Reading critical registry keys
Replacing files
Delayed writing of the file
Running batch commands
Creating a process with a hidden window
Using the Windows Management Instrumentation requests
Searching for the window
Stealing user critical data
Launching a tool to kill processes
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Malicious
Result
Threat name:
Oski Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
Downloads files with wrong headers with respect to MIME Content-Type
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Injects a PE file into a foreign processes
Machine Learning detection for sample
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 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:
2021-08-24 22:51:12 UTC
AV detection:
25 of 46 (54.35%)
Threat level:
5/5
Detection(s):
Suspicious file
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 behavior: EnumeratesProcesses
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
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:
ck7.mooo.com
Unpacked files
SH256 hash:
e8fd915f6c176308283f7567c4b2cbdbdcf617328492c9d09fcfd6364a6ddfba
MD5 hash:
2a000e68693fc94e1c93d7649712eb2f
SHA1 hash:
e5a8846d7161c3464987acb8c6ae610cafef4da1
Detections:
win_oski_g0
win_oski_auto
SH256 hash:
6912e4bedd1288f116e968f0a79d9797f6d6bd24d45a5f10c52e20f9d33b8c61
MD5 hash:
03bde4a82ad64c0f314985232fbca3fa
SHA1 hash:
e8d0b6339e94192eaaca32c812f914e60576dca6
SH256 hash:
7b82ef67319cf926fedd28e2f74ffba0eb32a04ee4ab630c9500bf78bda18b20
MD5 hash:
2b37c7816d53bc4f66b1ef8beb775561
SHA1 hash:
f3c4cc62f579f86b636d25cd5d55b9fb89d8cccc
SH256 hash:
d9fa9a6d2f94da43ceb1e54df2cac4e099d6700ad52db757e5cbbece821e73d9
MD5 hash:
92d6baf79e990130a1db2175731d4e46
SHA1 hash:
db9efd2c26760ce555c1c31ca8d80d1731b26771
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: | MALWARE_Win_Vidar |
|---|---|
| Author: | ditekSHen |
| Description: | Detects Vidar / ArkeiStealer |
| Rule name: | pe_imphash |
|---|
| Rule name: | pe_imphash |
|---|
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | Vidar |
|---|---|
| Author: | kevoreilly |
| Description: | Vidar Payload |
| Rule name: | win_oski_auto |
|---|---|
| Author: | Felix Bilstein - yara-signator at cocacoding dot com |
| Description: | Detects win.oski. |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
xlsx 7b82ef67319cf926fedd28e2f74ffba0eb32a04ee4ab630c9500bf78bda18b20
Dropping
SHA256 7b82ef67319cf926fedd28e2f74ffba0eb32a04ee4ab630c9500bf78bda18b20
Delivery method
Other
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