MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 e2d736aa3991b4b9d09ec99401ea45bea6cc317f3470e2a71105f1aac46d1ff8. 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: 12


Intelligence 12 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: e2d736aa3991b4b9d09ec99401ea45bea6cc317f3470e2a71105f1aac46d1ff8
SHA3-384 hash: 8d5c5aec0091dff76e1be151f36e9f207ed68bc17444de4e8c7ee21ea0cd04f7fde9493bee251dcff38afce3e74c7637
SHA1 hash: 773464014e40c178ee942dc8d19b68c509aed75b
MD5 hash: d62ad50b65151ada3167c117ff91f71c
humanhash: aspen-alaska-charlie-alabama
File name:d62ad50b65151ada3167c117ff91f71c.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:696'320 bytes
First seen:2022-01-21 14:37:59 UTC
Last seen:2022-01-21 17:12:45 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'653 x AgentTesla, 19'464 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 12288:o0/wQKpQ4Dj8ps9ILdVyELBPxdurgN9lq6+ievYF:9UpQ4f4zLKELpfN+6+ievYF
Threatray 3'584 similar samples on MalwareBazaar
TLSH T1CAE4D04133F88B45C4BE8BF648710490177EBE1AA874E71F6EA1B1DF0DB1B819A26753
File icon (PE):PE icon
dhash icon 1efef2c2e4a0e0e0 (16 x AgentTesla, 3 x Formbook, 3 x Loki)
Reporter abuse_ch
Tags:exe OskiStealer

Intelligence

File Origin
# of uploads :
2
# of downloads :
273
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Vidar
Create hunting rule
Link:
https://www.capesandbox.com/analysis/221513/
Detection(s):
SecuriteInfo.com.Trojan.Siggen16.37153.24768.5517.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
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
Using the Windows Management Instrumentation requests
Stealing user critical data
Launching a tool to kill processes
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
expand.exe ftp.exe obfuscated packed remote.exe shell32.dll
Link:
https://www.filescan.io/uploads/61eac554f81da814af962faa/reports/74b6c69e-07a0-4147-85b2-19327b837368/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:
Oski Stealer
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/96c0fb8d-8166-4d4d-8f1e-3489f4f9a1bd
Result
Threat name:
Oski Stealer Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/925257
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
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)
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:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 557740 Sample: ozvNe1q1vF.exe Startdate: 21/01/2022 Architecture: WINDOWS Score: 100 38 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->38 40 Found malware configuration 2->40 42 Antivirus detection for URL or domain 2->42 44 10 other signatures 2->44 8 ozvNe1q1vF.exe 3 2->8         started        process3 file4 26 C:\Users\user\AppData\...\ozvNe1q1vF.exe.log, ASCII 8->26 dropped 11 ozvNe1q1vF.exe 196 8->11         started        16 ozvNe1q1vF.exe 8->16         started        18 ozvNe1q1vF.exe 8->18         started        process5 dnsIp6 36 modexdeals.ir 104.21.62.142, 49763, 80 CLOUDFLARENETUS United States 11->36 28 C:\ProgramData\vcruntime140.dll, PE32 11->28 dropped 30 C:\ProgramData\sqlite3.dll, PE32 11->30 dropped 32 C:\ProgramData\softokn3.dll, PE32 11->32 dropped 34 4 other files (none is malicious) 11->34 dropped 46 Tries to harvest and steal browser information (history, passwords, etc) 11->46 48 Tries to steal Crypto Currency Wallets 11->48 20 cmd.exe 1 11->20         started        file7 signatures8 process9 process10 22 taskkill.exe 1 20->22         started        24 conhost.exe 20->24         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/e2d736aa3991b4b9d09ec99401ea45bea6cc317f3470e2a71105f1aac46d1ff8/
Threat name:
ByteCode-MSIL.Trojan.Oskistealer
Create hunting rule
Status:
Malicious
First seen:
2022-01-21 14:38:14 UTC
File Type:
PE (.Net Exe)
Extracted files:
54
AV detection:
19 of 28 (67.86%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=4lltnkrzsg2ltue6zgkad2sfx2tmyml7gryofjyraxy2vrdnd74a._file
Verdict:
malicious
Similar samples:
469bb0b552b4d40a4f7d1334f69c121826b2a0ff3eeab0b69b97f836818d97a2
OskiStealer
76d739008009934a9aacb4e62c3fa45d01d8a38320857f073c9a4db4e6046640
OskiStealer
9b4952dc2d34aba59e87c0c185358a57acb0fd071d63fc2af6c6c9ae8952be37
OskiStealer
aced60ae902ad2acddb74c078406a2f9d669609f6571505754d4b78e3b439305
OskiStealer
becbc1b05321dc51b2e50fcbb6c2be8da96c2648bebc11638701a69f22b226d8
OskiStealer
d9a8ff42d8a53247338920a5d7c8f2ecbb512d9e81334e68d1c54a6cc46c5351
OskiStealer
f7a423c9fd6cf87566b34d2dab352a81821ba3737864cc1abec2593429965300
OskiStealer
+ 3'574 additional samples on MalwareBazaar
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski discovery infostealer spyware stealer
Link:
https://tria.ge/reports/220121-rzqr1ahgf3/
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:
modexdeals.ir
Unpacked files
SH256 hash:
0deb2743990b60931b1e53860f7da5c569716ff1e33a74231fa8385012d112ba
MD5 hash:
919164a94f9234c991134a1e749ed52b
SHA1 hash:
e116fee480efabf5d9184764d7422557b0dbaed4
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/30bedf46-4a39-4348-99f5-3ea0ee44e8ee/
Parent samples :
aced60ae902ad2acddb74c078406a2f9d669609f6571505754d4b78e3b439305
0cf47ee37fd8ac01c75b6ea18f80d2647df7dee7235e5e22891bc8b3e8587a28
ab65d6eee8d3fef8fa8709054023cc39a0ab2b532245f61681f3e318908e6357
f7a423c9fd6cf87566b34d2dab352a81821ba3737864cc1abec2593429965300
e2d736aa3991b4b9d09ec99401ea45bea6cc317f3470e2a71105f1aac46d1ff8
f4112faf7476b5132e97e1822ab118742924603900d01370ce0c66dfcbc1e41b
SH256 hash:
28821c71a596fa774400f7941b072de440fa25015a7742934318f3dbf31bc9ac
MD5 hash:
e4ea69661dcc6c21203451b372205fb3
SHA1 hash:
916f6fa82dd420757922aa35fd55f90a41405122
Link:
https://www.unpac.me/results/30bedf46-4a39-4348-99f5-3ea0ee44e8ee/
SH256 hash:
b094430d82ea5b31510b25ffadd0810ebb8b17094319fd29e1968f93b2319cd3
MD5 hash:
ed3630f32582fef7eb4dd7a306beffd3
SHA1 hash:
87d6bb24ba7be0680d0056985af0cfcc8987bc6e
Link:
https://www.unpac.me/results/30bedf46-4a39-4348-99f5-3ea0ee44e8ee/
SH256 hash:
e2d736aa3991b4b9d09ec99401ea45bea6cc317f3470e2a71105f1aac46d1ff8
MD5 hash:
d62ad50b65151ada3167c117ff91f71c
SHA1 hash:
773464014e40c178ee942dc8d19b68c509aed75b
Link:
https://www.unpac.me/results/30bedf46-4a39-4348-99f5-3ea0ee44e8ee/
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/e2d736aa3991b4b9d09ec99401ea45bea6cc317f3470e2a71105f1aac46d1ff8

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
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.

Web download

OskiStealer

Executable exe e2d736aa3991b4b9d09ec99401ea45bea6cc317f3470e2a71105f1aac46d1ff8

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1970259/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/221513/

Comments