MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 fc55c796977aaab2254fd98cd04595c9eab86f459f3288f5f33d8fc9f050fdc4. 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: 13
| SHA256 hash: | fc55c796977aaab2254fd98cd04595c9eab86f459f3288f5f33d8fc9f050fdc4 |
|---|---|
| SHA3-384 hash: | d5a63be5bb469cacf2569357d9c66ffa13c94839613a20f8b3453214b452c3230291567c1a7362f205033c0ff37f50e5 |
| SHA1 hash: | 6f01b319ed22984cccc2edce62742f869bbccd34 |
| MD5 hash: | 818856f62f9ef72ae5d9c51877a9b365 |
| humanhash: | august-winner-oscar-bakerloo |
| File name: | 818856f62f9ef72ae5d9c51877a9b365.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 576'000 bytes |
| First seen: | 2021-12-22 02:45:31 UTC |
| Last seen: | 2021-12-22 05:13:20 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger) |
| ssdeep | 12288:IxcBuSK3dVLU0Qmx5AQU6492/g73Z1sEbuvq1l65xWHqtGG:ICUSK3dVRXW9241swuvbbGG |
| TLSH | T162C4CE4232AC5F16DB78BBF96AB4A35033B07D762923E24D5DC971CA2436B814D70E27 |
| File icon (PE): |  |
| dhash icon | b3b3333969693b3b (69 x Formbook, 63 x AgentTesla, 26 x Loki) |
| 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://jessecoltd.ir/6.jpg | https://threatfox.abuse.ch/ioc/280082/ |
| http://jessecoltd.ir/1.jpg | https://threatfox.abuse.ch/ioc/280083/ |
| http://jessecoltd.ir/2.jpg | https://threatfox.abuse.ch/ioc/280084/ |
| http://jessecoltd.ir/3.jpg | https://threatfox.abuse.ch/ioc/280085/ |
| http://jessecoltd.ir/4.jpg | https://threatfox.abuse.ch/ioc/280086/ |
| http://jessecoltd.ir/5.jpg | https://threatfox.abuse.ch/ioc/280087/ |
| http://jessecoltd.ir/7.jpg | https://threatfox.abuse.ch/ioc/280088/ |
Intelligence
File Origin
# of uploads :
2
# of downloads :
224
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
818856f62f9ef72ae5d9c51877a9b365.exe
Verdict:
Malicious activity
Analysis date:
2021-12-22 02:47:40 UTC
Tags:
trojan stealer vidar loader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
DNS request
Unauthorized injection to a recently created process
Creating a file
Reading critical registry keys
Delayed writing of the file
Сreating synchronization primitives
Running batch commands
Creating a process with a hidden window
Stealing user critical data
Launching a tool to kill processes
Verdict:
Malicious
Threat level:
10/10
Confidence:
100%
Tags:
evasive obfuscated packed
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 Stealer Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
C2 URLs / IPs found in malware configuration
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
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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.Pwsx
Status:
Malicious
First seen:
2021-12-22 02:46:09 UTC
File Type:
PE (.Net Exe)
Extracted files:
10
AV detection:
21 of 27 (77.78%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Result
Malware family:
oski
Score:
10/10
Tags:
family:oski discovery infostealer spyware stealer
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
Malware Config
C2 Extraction:
jessecoltd.ir
Unpacked files
SH256 hash:
65788ef426aa20f0b70f12a78a390e9853a3905e7ffb45b5e2d3dd95b9784809
MD5 hash:
86ccc0e5b2351ba0bbcf60c5007813fc
SHA1 hash:
a7adb863bcba69257ef0a71b7a37d9997fa06c9f
SH256 hash:
becbc1b05321dc51b2e50fcbb6c2be8da96c2648bebc11638701a69f22b226d8
MD5 hash:
f6b589c57ed54d122c17eace179999e7
SHA1 hash:
712c69f3b4c46d3909f7251b9d2ad7675b00fccd
Detections:
win_oski_g0
win_oski_auto
Parent samples :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 hash:
9f5763966bacdc6de3944a6e06a49b05869c38f2e98b32cb93b483a480a6ffff
MD5 hash:
3418c620c4b9dd4533a88f1ba5ec3ff1
SHA1 hash:
12f6aaf1c90030c4063d42a27b2e7000a08b6e74
SH256 hash:
fc55c796977aaab2254fd98cd04595c9eab86f459f3288f5f33d8fc9f050fdc4
MD5 hash:
818856f62f9ef72ae5d9c51877a9b365
SHA1 hash:
6f01b319ed22984cccc2edce62742f869bbccd34
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.
Web download
Delivery method
Distributed via web download
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