MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 cc4c6be7a609aaaabf82ae1cd164c567ff7f7cc1ebdb59175d0ae1ecbac74b5c. 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: | cc4c6be7a609aaaabf82ae1cd164c567ff7f7cc1ebdb59175d0ae1ecbac74b5c |
|---|---|
| SHA3-384 hash: | b7a41323586471fa0ad54f130eb2f58912b13761196c334d636d283faaf5c67addd507c6476e9982954e0188939b26d7 |
| SHA1 hash: | 0c15f00e4afd24e1e09e43b3c2c6d711a60b2806 |
| MD5 hash: | 470dac4893d3f15bce96543d2e023658 |
| humanhash: | oklahoma-neptune-fifteen-december |
| File name: | gunzipped.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 254'588 bytes |
| First seen: | 2021-04-30 14:06:17 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | ea4e67a31ace1a72683a99b80cf37830 (70 x Formbook, 63 x GuLoader, 54 x Loki) |
| ssdeep | 6144:lPXIKW/3/SlOz6FATGiC3GIjloilH2bSt2iE:aKcSgRTnilmil2f |
| Threatray | 1'741 similar samples on MalwareBazaar |
| TLSH | 1244126A36A0C0BBCB7645701D7646A1BFE5D6101270824BF380FB9D7A457D38E9F8D2 |
| 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://bestbundledealer.com/6.jpg | https://threatfox.abuse.ch/ioc/26715/ |
| http://bestbundledealer.com/1.jpg | https://threatfox.abuse.ch/ioc/26716/ |
| http://bestbundledealer.com/2.jpg | https://threatfox.abuse.ch/ioc/26717/ |
| http://bestbundledealer.com/3.jpg | https://threatfox.abuse.ch/ioc/26718/ |
| http://bestbundledealer.com/4.jpg | https://threatfox.abuse.ch/ioc/26719/ |
| http://bestbundledealer.com/5.jpg | https://threatfox.abuse.ch/ioc/26720/ |
| http://bestbundledealer.com/7.jpg | https://threatfox.abuse.ch/ioc/26721/ |
Intelligence
File Origin
# of uploads :
1
# of downloads :
117
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a file in the %temp% directory
Creating a file
Sending a UDP request
Creating a file in the %AppData% subdirectories
Unauthorized injection to a recently created process
DNS request
Connection attempt
Deleting a recently created file
Reading critical registry keys
Replacing files
Creating a window
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
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Stealing user critical data
Launching a tool to kill processes
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.
Result
Threat name:
Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Downloads files with wrong headers with respect to MIME Content-Type
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Machine Learning detection for dropped file
Machine Learning detection for sample
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Crypto Currency Wallets
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Threat name:
Win32.Trojan.Generic
Status:
Suspicious
First seen:
2021-04-30 14:07:12 UTC
AV detection:
15 of 28 (53.57%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Similar samples:
+ 1'731 additional samples on MalwareBazaar
Result
Malware family:
oski
Score:
10/10
Tags:
family:oski discovery infostealer persistence spyware stealer
Behaviour
Checks processor information in registry
Kills process with taskkill
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Adds Run key to start application
Checks installed software on the system
Deletes itself
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Oski
Unpacked files
SH256 hash:
2a12c0ad367e86bf5f1b59b12825128dc50c712bc606a7b59c89ccf3cb90e48f
MD5 hash:
76c77d7c169c256b1e70fddf6c3753c3
SHA1 hash:
eb456a20de82853176bb1ce74cfe433ec990fd0d
SH256 hash:
cc4c6be7a609aaaabf82ae1cd164c567ff7f7cc1ebdb59175d0ae1ecbac74b5c
MD5 hash:
470dac4893d3f15bce96543d2e023658
SHA1 hash:
0c15f00e4afd24e1e09e43b3c2c6d711a60b2806
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: | Vidar |
|---|---|
| Author: | kevoreilly |
| Description: | Vidar Payload |
| Rule name: | win_oski_auto |
|---|---|
| Author: | Felix Bilstein - yara-signator at cocacoding dot com |
| Description: | autogenerated rule brought to you by yara-signator |
| Rule name: | win_oski_g0 |
|---|---|
| Author: | Slavo Greminger, SWITCH-CERT |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Comments
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MBC behaviors list (github.com/accidentalrebel/mbcscan):
============================================================
0) [C0032.001] Data Micro-objective::CRC32::Checksum
1) [C0026.002] Data Micro-objective::XOR::Encode Data
4) [C0046] File System Micro-objective::Create Directory
5) [C0048] File System Micro-objective::Delete Directory
6) [C0047] File System Micro-objective::Delete File
7) [C0049] File System Micro-objective::Get File Attributes
8) [C0051] File System Micro-objective::Read File
9) [C0050] File System Micro-objective::Set File Attributes
10) [C0052] File System Micro-objective::Writes File
11) [E1510] Impact::Clipboard Modification
12) [C0036.004] Operating System Micro-objective::Create Registry Key::Registry
13) [C0036.002] Operating System Micro-objective::Delete Registry Key::Registry
14) [C0036.003] Operating System Micro-objective::Open Registry Key::Registry
15) [C0036.005] Operating System Micro-objective::Query Registry Key::Registry
16) [C0036.006] Operating System Micro-objective::Query Registry Value::Registry
17) [C0017] Process Micro-objective::Create Process
18) [C0038] Process Micro-objective::Create Thread