MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 fb30ae8d4bcce71593ae5da2277634ad9ccf2964f1dc7f9997872b498753aa74. 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: 7


Intelligence 7 IOCs 7 YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: fb30ae8d4bcce71593ae5da2277634ad9ccf2964f1dc7f9997872b498753aa74
SHA3-384 hash: ff81b9a17ec65bbe36235d7317dab97d025d1c0a4a62a4016ff26535f390cd7760a1c36959e18670521fcd88051ef3d2
SHA1 hash: d3eff2720f7222908dab81df323a4e772f973e64
MD5 hash: 587019a76119966735b206753a44b53c
humanhash: nitrogen-artist-stream-leopard
File name:RFL0784510200.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:295'408 bytes
First seen:2021-06-14 04:05:37 UTC
Last seen:2021-06-14 04:49:24 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'608 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 6144:Ik0gWQ4beFld7Oi9wDwV3BHfckvDHgxg9VVigpS2Vl2kO8keicG1h431U1:Ik0S4iHdKi9wDwZ1frgxg9SD2LW841ak
TLSH 4954F12653872141C8C60BBABCD1CC5AB5FEF750051F0EE3795E2E3FC558986AB22927
Reporter abuse_ch
Tags:exe OskiStealer


Avatar
abuse_ch
OskiStealer C2:
http://209.141.59.251/6.jpg

Indicators Of Compromise (IOCs)

Below is a list of indicators of compromise (IOCs) associated with this malware samples.

IOCThreatFox Reference
http://209.141.59.251/6.jpg https://threatfox.abuse.ch/ioc/104375/
http://209.141.59.251/1.jpg https://threatfox.abuse.ch/ioc/104376/
http://209.141.59.251/2.jpg https://threatfox.abuse.ch/ioc/104377/
http://209.141.59.251/3.jpg https://threatfox.abuse.ch/ioc/104378/
http://209.141.59.251/4.jpg https://threatfox.abuse.ch/ioc/104379/
http://209.141.59.251/5.jpg https://threatfox.abuse.ch/ioc/104380/
http://209.141.59.251/7.jpg https://threatfox.abuse.ch/ioc/104381/

Intelligence

File Origin
# of uploads :
2
# of downloads :
130
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFL0784510200.exe
Verdict:
No threats detected
Analysis date:
2021-06-14 04:09:32 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/3cf37acc-f691-4618-8dae-9dea4ee179be

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.835.22807.13125.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Launching the default Windows debugger (dwwin.exe)
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
Link:
https://analyze.intezer.com/analyses/fbee54e0-6a4e-4f2e-aca9-0f38781864fc
Result
Threat name:
Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/801469
Signature
Allocates memory in foreign processes
Creates an undocumented autostart registry key
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
Writes to foreign memory regions
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 433864 Sample: RFL0784510200.exe Startdate: 14/06/2021 Architecture: WINDOWS Score: 100 41 Found malware configuration 2->41 43 Multi AV Scanner detection for dropped file 2->43 45 Multi AV Scanner detection for submitted file 2->45 47 8 other signatures 2->47 8 RFL0784510200.exe 22 2->8         started        process3 file4 23 C:\Users\user\AppData\Roaming\...\notpad.exe, PE32 8->23 dropped 25 C:\Users\user\AppData\...\RFL0784510200.exe, PE32 8->25 dropped 27 C:\Users\user\...\notpad.exe:Zone.Identifier, ASCII 8->27 dropped 29 2 other malicious files 8->29 dropped 49 Creates an undocumented autostart registry key 8->49 51 Writes to foreign memory regions 8->51 53 Allocates memory in foreign processes 8->53 55 Injects a PE file into a foreign processes 8->55 12 RFL0784510200.exe 193 8->12         started        signatures5 process6 dnsIp7 39 209.141.59.251, 49721, 80 PONYNETUS United States 12->39 31 C:\ProgramData\vcruntime140.dll, PE32 12->31 dropped 33 C:\ProgramData\sqlite3.dll, PE32 12->33 dropped 35 C:\ProgramData\softokn3.dll, PE32 12->35 dropped 37 4 other files (none is malicious) 12->37 dropped 57 Multi AV Scanner detection for dropped file 12->57 59 Machine Learning detection for dropped file 12->59 61 Tries to harvest and steal browser information (history, passwords, etc) 12->61 63 Tries to steal Crypto Currency Wallets 12->63 17 cmd.exe 1 12->17         started        file8 signatures9 process10 process11 19 taskkill.exe 1 17->19         started        21 conhost.exe 17->21         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/fb30ae8d4bcce71593ae5da2277634ad9ccf2964f1dc7f9997872b498753aa74/
Threat name:
ByteCode-MSIL.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2021-06-14 01:48:37 UTC
AV detection:
7 of 46 (15.22%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=7myk5dklzttrle5olwrco5ruvwom6kle6hoh7gmxq4vutb2tvj2a._file
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski discovery infostealer spyware stealer
Link:
https://tria.ge/reports/210614-lz8tw7623n/
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
Deletes itself
Loads dropped DLL
Reads user/profile data of web browsers
Downloads MZ/PE file
Oski
Malware Config
C2 Extraction:
209.141.59.251
Unpacked files
SH256 hash:
ee16d346c87bb4e1031f7b53d6a9ba9d6f31655ebf258480285d63c531f36524
MD5 hash:
922468ad5247688438a1ce9bf027ada9
SHA1 hash:
df146fabbd5e7a057e968be452585cac11d0ffac
Link:
https://www.unpac.me/results/35824aec-76cd-484e-9f92-f17480369937/
SH256 hash:
1fe4ad309be26ef7d648a9c23ebb24a5d88fe28cdab3f901e83380dd33c7d5f3
MD5 hash:
8460c207825f838d906a728b529e0621
SHA1 hash:
4687659adddc3b0e9dee5b10d991a46478fcf9d0
Link:
https://www.unpac.me/results/35824aec-76cd-484e-9f92-f17480369937/
SH256 hash:
fb30ae8d4bcce71593ae5da2277634ad9ccf2964f1dc7f9997872b498753aa74
MD5 hash:
587019a76119966735b206753a44b53c
SHA1 hash:
d3eff2720f7222908dab81df323a4e772f973e64
Link:
https://www.unpac.me/results/35824aec-76cd-484e-9f92-f17480369937/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/fb30ae8d4bcce71593ae5da2277634ad9ccf2964f1dc7f9997872b498753aa74

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:INDICATOR_KB_CERT_1f3216f428f850be2c66caa056f6d821
Create hunting rule
Author:ditekSHen
Description:Detects executables signed with stolen, revoked or invalid certificates
Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:pe_imphash
Create hunting rule
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.

Comments