MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 27cd376e2cadfbc6a07f01b0168e20ba22ea6d181d510c7316b758f85c72442a. 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


Intelligence 11 IOCs YARA 2 File information Comments
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SHA256 hash: 27cd376e2cadfbc6a07f01b0168e20ba22ea6d181d510c7316b758f85c72442a
SHA3-384 hash: d25dfaf4667c70c54f453978ee13bbbc7a76c99c51e7a93e933c752cafa9c5381b154a7fe94a8758940723f884391f1f
SHA1 hash: e7e9a38bba03ba858083eea322271016afeee1dd
MD5 hash: 72fa05be3392be5638758ee698836ffb
humanhash: avocado-juliet-missouri-failed
File name:REVISED OT STATMENT.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:24'064 bytes
First seen:2022-06-06 11:35:14 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'748 x AgentTesla, 19'643 x Formbook, 12'245 x SnakeKeylogger)
ssdeep 192:02/XBYDbfRAma5X1T+YbCTYpBQ9oGR6H1iS2W/5owhtFhseU5LIlz:XXBIJcX1T+YbCT2GAH1zFRXUlI
Threatray 5'271 similar samples on MalwareBazaar
TLSH T168B2F914E3E5C175CDE61AF6DD226180822A6D048D625A0FA447331E7EF324CE9DEBF2
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon b1b1b17964989c06 (31 x SnakeKeylogger, 4 x AgentTesla, 3 x XWorm)
Reporter malwarelabnet
Tags:exe oski OskiStealer

Intelligence

File Origin
# of uploads :
1
# of downloads :
318
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
vidar
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ID:
1
File name:
REVISED OT STATMENT.exe
Verdict:
Malicious activity
Analysis date:
2022-06-06 11:54:34 UTC
Tags:
trojan stealer vidar loader
Link:
https://app.any.run/tasks/74e22ca7-cf20-4569-b86a-5c0a280f5b4f

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/277013/
Detection(s):
SecuriteInfo.com.W32.AIDetectNet.01.31718.2589.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Сreating synchronization primitives
Creating a file in the %AppData% directory
Launching a process
Creating a file
Reading critical registry keys
Delayed writing of the file
Running batch commands
Creating a process with a hidden window
Query of malicious DNS domain
Sending a TCP request to an infection source
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Stealing user critical data
Launching a tool to kill processes
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/629de687816de95910e0e612/reports/39ccdda2-328f-4164-a37d-89697575b7d3/overview
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.
Malware family:
AVEMARIA
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/4c37f68b-d81b-4799-80be-fa04b61ee8ed
Result
Threat name:
Oski Stealer, Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1007314
Signature
.NET source code contains potential unpacker
DLL side loading technique detected
Downloads files with wrong headers with respect to MIME Content-Type
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
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
Snort IDS alert for network traffic
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
Writes to foreign memory regions
Yara detected Costura Assembly Loader
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 639811 Sample: REVISED OT STATMENT.exe Startdate: 06/06/2022 Architecture: WINDOWS Score: 100 74 Snort IDS alert for network traffic 2->74 76 Malicious sample detected (through community Yara rule) 2->76 78 Multi AV Scanner detection for submitted file 2->78 80 9 other signatures 2->80 8 REVISED OT STATMENT.exe 16 5 2->8         started        13 Msword.exe 14 3 2->13         started        15 Msword.exe 2 2->15         started        process3 dnsIp4 66 chibuzorbaby.com 142.4.0.135, 443, 49761, 49775 UNIFIEDLAYER-AS-1US United States 8->66 68 unitech.co.vu 8->68 48 C:\Users\user\AppData\Roaming\Msword.exe, PE32 8->48 dropped 50 C:\Users\user\...\Msword.exe:Zone.Identifier, ASCII 8->50 dropped 52 C:\Users\user\...\REVISED OT STATMENT.exe.log, ASCII 8->52 dropped 88 Writes to foreign memory regions 8->88 90 Injects a PE file into a foreign processes 8->90 17 MSBuild.exe 196 8->17         started        22 svchost.exe 8->22         started        70 unitech.co.vu 13->70 92 Machine Learning detection for dropped file 13->92 24 Msword.exe 13->24         started        72 unitech.co.vu 15->72 26 Msword.exe 15->26         started        file5 signatures6 process7 dnsIp8 54 unitech.co.vu 17->54 56 chibuzorbaby.com 17->56 40 C:\ProgramData\sqlite3.dll, PE32 17->40 dropped 42 C:\ProgramData\vcruntime140.dll, PE32 17->42 dropped 44 C:\ProgramData\softokn3.dll, PE32 17->44 dropped 46 4 other files (none is malicious) 17->46 dropped 82 DLL side loading technique detected 17->82 84 Tries to steal Crypto Currency Wallets 17->84 28 cmd.exe 22->28         started        58 unitech.co.vu 24->58 60 chibuzorbaby.com 24->60 30 cmd.exe 24->30         started        62 unitech.co.vu 26->62 64 chibuzorbaby.com 26->64 86 Tries to harvest and steal browser information (history, passwords, etc) 26->86 file9 signatures10 process11 process12 32 conhost.exe 28->32         started        34 taskkill.exe 28->34         started        36 conhost.exe 30->36         started        38 taskkill.exe 30->38         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/27cd376e2cadfbc6a07f01b0168e20ba22ea6d181d510c7316b758f85c72442a/
Threat name:
ByteCode-MSIL.Downloader.Wagex
Create hunting rule
Status:
Malicious
First seen:
2022-06-06 06:06:59 UTC
File Type:
PE (.Net Exe)
Extracted files:
8
AV detection:
17 of 26 (65.38%)
Threat level:
  3/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=e7gto3rmvx54nid7agybndraxirou3iydviqy4yww5mpqxdsiqva._file
Verdict:
malicious
Label(s):
masslogger
Create hunting rule
Similar samples:
191db013c67081442ef5e75edd00c2572f6ec9d7f629ddac9bba8942722c061d
OskiStealer
1a2bc82de6e0c26030a3600c836329329dbcf1d4d84e031a90dd7df5355ed612
OskiStealer
41257a21d27bcb773bb43e7b23c918d5ea4135a868b915d0fb738cd5c19af256
OskiStealer
8399c97b606bb6613f99006964a47064e402e6489574b85db7a9872f601886b2
OskiStealer
b8868eb87c7cb945704e2d0b8ec2ebdc890cd6df12f9ef0a7295582c7fd0cf1f
OskiStealer
fabe67cd06d71d24a03fe0d11e62e975de4c58903bcbc35f48a3a566970c228c
OskiStealer
+ 5'261 additional samples on MalwareBazaar
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski infostealer persistence spyware suricata
Link:
https://tria.ge/reports/220606-nqkmvafge8/
Behaviour
Checks processor information in registry
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Program crash
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Adds Run key to start application
Loads dropped DLL
Downloads MZ/PE file
Oski
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)
suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt) M2
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil
suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern
Malware Config
C2 Extraction:
unitech.co.vu
Unpacked files
SH256 hash:
27cd376e2cadfbc6a07f01b0168e20ba22ea6d181d510c7316b758f85c72442a
MD5 hash:
72fa05be3392be5638758ee698836ffb
SHA1 hash:
e7e9a38bba03ba858083eea322271016afeee1dd
Link:
https://www.unpac.me/results/e4eb6bf4-7808-4d81-b60b-a70f5015129e/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/27cd376e2cad/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.35
Link:
https://yomi.yoroi.company/submissions/27cd376e2cadfbc6a07f01b0168e20ba22ea6d181d510c7316b758f85c72442a

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
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Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Cape
Cape
https://www.capesandbox.com/analysis/277013/

Comments