MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 8e07cf5e12ed70918b410fdb95fdf6905c191df169df5fdf994daac99c8bd359. 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: | 8e07cf5e12ed70918b410fdb95fdf6905c191df169df5fdf994daac99c8bd359 |
|---|---|
| SHA3-384 hash: | bfea664ecf78c1edfb37e015276a6f76b4a22822327c81e9ded93fbf94908135205debf7d8875c2cdf2acc361f308a16 |
| SHA1 hash: | 5fb7a4fc46659b510fbcbb51d9e08bdf08490b62 |
| MD5 hash: | 406171ecbe8c3d96852acef91ec2e6db |
| humanhash: | apart-bacon-november-colorado |
| File name: | 406171ecbe8c3d96852acef91ec2e6db |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 584'704 bytes |
| First seen: | 2021-07-28 19:22:32 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:B5tM+E02iNv4sxxrMAbU3Sg9r28R1g9lHQI0uS:vbE01usjMMuSg96WIjV |
| Threatray | 2'224 similar samples on MalwareBazaar |
| TLSH | T10CC46934135B0A63E276D6B29154E6C1FEA0D9D3A3C1CF09BA8369CB1D22703159EE5F |
| Reporter |  zbetcheckin |
| Tags: | 32 exe OskiStealer |
Intelligence
File Origin
# of uploads :
1
# of downloads :
105
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
DOCUMENT4.xlsx
Verdict:
Malicious activity
Analysis date:
2021-07-28 14:53:07 UTC
Tags:
encrypted exploit CVE-2017-11882 loader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Detection(s):
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.
Verdict:
Malicious
Result
Threat name:
Oski Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
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 dropped file
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
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
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Gathering data
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Status:
Malicious
First seen:
2021-07-28 07:54:25 UTC
AV detection:
19 of 28 (67.86%)
Threat level:
5/5
Verdict:
malicious
Similar samples:
+ 2'214 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
Creates scheduled task(s)
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
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:
fair.le-pearl.com
Unpacked files
SH256 hash:
f75990347fda8a47994e5795732fb687a56e3251ccc940e3906602fce86913cc
MD5 hash:
39b19ae55220c0800936fc799b0a1dec
SHA1 hash:
2af489e1d36e7bbdcb21465f522a086a0ceeb2c1
SH256 hash:
6aedda3af32b788435d84fd22e021e765df1183ca0f919ccc8a1ceed07a51afc
MD5 hash:
938183693f26c78eaae82fbd60e5ad8c
SHA1 hash:
3d39fd1e213c1ac0978c2cb30e2b576117acef41
Detections:
win_oski_g0
win_oski_auto
SH256 hash:
c362729899c5956cfa9fc3bcf9b21ac72066a1b84a497ceb1281f76e2f55c54b
MD5 hash:
0327d1374a5ce015ad9c83c5de76e823
SHA1 hash:
e521349d9e96a4191248747c42c78b6f88fc8f63
SH256 hash:
8e07cf5e12ed70918b410fdb95fdf6905c191df169df5fdf994daac99c8bd359
MD5 hash:
406171ecbe8c3d96852acef91ec2e6db
SHA1 hash:
5fb7a4fc46659b510fbcbb51d9e08bdf08490b62
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.
Web download
Delivery method
Distributed via web download
Comments
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