MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 35f377ad1b6647c04b0967c7825c96360fe035ae7b0fac43380a1cccc8969d85. 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: 15


Intelligence 15 IOCs 1 YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 35f377ad1b6647c04b0967c7825c96360fe035ae7b0fac43380a1cccc8969d85
SHA3-384 hash: c0700dbe08b8b40bcc713e29d1292fb619a96ac2dc0845f67e722bd95fd538fc2bd6ce121ae681e2d9cb853183c6d48f
SHA1 hash: 10168e940adfc2040de3fda89b324b2b97b6d011
MD5 hash: 63436b01bd2affa65b7556ff4042325b
humanhash: undress-nineteen-violet-one
File name:SecuriteInfo.com.Trojan.Siggen17.51840.26709.6924
Download: download sample
Signature OskiStealer
Create hunting rule
File size:545'792 bytes
First seen:2022-05-17 07:39:30 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:FnBYv43YglA/5/AeIzNKnCPBpGsvUzeKH4EJZkw9A:Fc8YOq4eSQCPBUsvUzTH4Ev19A
Threatray 4'297 similar samples on MalwareBazaar
TLSH T137C41340A1E8C335EAFA5671683B89184DF6F4026152FB6A1DD6B0EF0CB3F064E5297D
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 c0b0c6c8a896a0c0 (20 x AgentTesla, 19 x Formbook, 12 x Loki)
Reporter SecuriteInfoCom
Tags:exe OskiStealer

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://unitech.co.vu/6.jpg https://threatfox.abuse.ch/ioc/574605/

Intelligence

File Origin
# of uploads :
1
# of downloads :
217
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
vidar
Create hunting rule
ID:
1
File name:
SecuriteInfo.com.Trojan.Siggen17.51840.26709.6924
Verdict:
Malicious activity
Analysis date:
2022-05-18 07:22:06 UTC
Tags:
trojan stealer vidar loader
Link:
https://app.any.run/tasks/1e8504eb-0d1d-4270-9e8b-77100accad48

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Vidar
Create hunting rule
Link:
https://www.capesandbox.com/analysis/271372/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a process from a recently created file
Creating a process with a hidden window
Launching a process
Creating a file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed replace.exe
Link:
https://www.filescan.io/uploads/6283515322b733139c246570/reports/0c7ebfab-b354-47fe-b0f1-d76429983b28/overview
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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/70eb425c-6b1b-474d-b00d-f134e540981c
Result
Threat name:
Oski Stealer, Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/995587
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
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
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
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
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected Generic Downloader
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 628089 Sample: SecuriteInfo.com.Trojan.Sig... Startdate: 17/05/2022 Architecture: WINDOWS Score: 100 53 Snort IDS alert for network traffic 2->53 55 Found malware configuration 2->55 57 Malicious sample detected (through community Yara rule) 2->57 59 15 other signatures 2->59 8 SecuriteInfo.com.Trojan.Siggen17.51840.26709.exe 7 2->8         started        process3 file4 31 C:\Users\user\AppData\Roaming\PhBNVZ.exe, PE32 8->31 dropped 33 C:\Users\user\...\PhBNVZ.exe:Zone.Identifier, ASCII 8->33 dropped 35 C:\Users\user\AppData\Local\...\tmpC9AE.tmp, XML 8->35 dropped 37 SecuriteInfo.com.T...51840.26709.exe.log, ASCII 8->37 dropped 61 Uses schtasks.exe or at.exe to add and modify task schedules 8->61 63 Adds a directory exclusion to Windows Defender 8->63 65 Injects a PE file into a foreign processes 8->65 12 SecuriteInfo.com.Trojan.Siggen17.51840.26709.exe 196 8->12         started        17 powershell.exe 25 8->17         started        19 schtasks.exe 1 8->19         started        signatures5 process6 dnsIp7 47 chibuzorbaby.com 142.4.0.135, 49770, 49781, 80 UNIFIEDLAYER-AS-1US United States 12->47 49 192.168.2.1 unknown unknown 12->49 51 unitech.co.vu 12->51 39 C:\ProgramData\vcruntime140.dll, PE32 12->39 dropped 41 C:\ProgramData\sqlite3.dll, PE32 12->41 dropped 43 C:\ProgramData\softokn3.dll, PE32 12->43 dropped 45 4 other files (none is malicious) 12->45 dropped 67 Tries to harvest and steal browser information (history, passwords, etc) 12->67 69 Tries to steal Crypto Currency Wallets 12->69 21 cmd.exe 12->21         started        23 conhost.exe 17->23         started        25 conhost.exe 19->25         started        file8 signatures9 process10 process11 27 conhost.exe 21->27         started        29 taskkill.exe 21->29         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/35f377ad1b6647c04b0967c7825c96360fe035ae7b0fac43380a1cccc8969d85/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-05-16 03:16:45 UTC
File Type:
PE (.Net Exe)
Extracted files:
6
AV detection:
14 of 26 (53.85%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=gxzxpli3mzd4asyjm7dyexewgyh6annopmh2yqzybiomzsewtwcq._file
Verdict:
malicious
Similar samples:
11810610b0fcbfe0edc318d79ede6dcbb2c4b34dccbace91d3775001187c3c96
OskiStealer
14a2149ffb9dc7a2bfa96e92ee4d7052222d5550431ffebc471b31859b397024
OskiStealer
1c53cbedc20ce9cf5b5e69fac6211133faa197f85b214a865f71cf4e0879dd99
OskiStealer
48d338ba06ada3da080eeeddb8a267b1b677dc9c3670f13e333ec8c73ff1b02c
OskiStealer
5b934219ee24cde16acffda6640ac940cfd7f6bdcb93aad90919c89e84343727
OskiStealer
6107e3ec5898ce2f80b04ee16b3a41107a0733339cded01cf8c5ade5fc105472
OskiStealer
8399c97b606bb6613f99006964a47064e402e6489574b85db7a9872f601886b2
OskiStealer
95e67dec1a50e9a83fbb5b430c1b21b851e1f0aa8da0ee9efbece3085ad4c462
OskiStealer
aec9eb81f2a2837488165119d41da8eec94607b9bde0b729f811ced008ad95cb
OskiStealer
+ 4'287 additional samples on MalwareBazaar
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski discovery infostealer spyware stealer suricata
Link:
https://tria.ge/reports/220517-jhkknabcgp/
Behaviour
Checks processor information in registry
Creates scheduled task(s)
Kills process with taskkill
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks installed software on the system
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks computer location settings
Loads dropped DLL
Reads user/profile data of web browsers
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:
46a579e2d98e1f324edbc77c24969060b2d8f757c90342ac5dc17a4eb440cbee
MD5 hash:
f179a4cb476d9d4b047d8707b5dccb6f
SHA1 hash:
cbc7400c959b6507663a3ab1cb145dc375bdf151
Link:
https://www.unpac.me/results/bff25507-fa45-4174-801e-a26b9c2b025c/
SH256 hash:
80dc00d0eb0dafde089f7d506b8c1fa1a0b9c2239a7af24d7cb5a740dd73f274
MD5 hash:
050f77606b7c019c02856b3a01828aad
SHA1 hash:
ab4c3ed92591341bc7c55c566f3dbc36a2235657
Link:
https://www.unpac.me/results/bff25507-fa45-4174-801e-a26b9c2b025c/
SH256 hash:
709fdbef8932044e42231f14888aa12b12ddc571e6daba8af86d624a39fa63bf
MD5 hash:
a7a6647650fe0204d1ab042824d638be
SHA1 hash:
a1194aba19ab6190a412073fe1918cd1b559aacf
Link:
https://www.unpac.me/results/bff25507-fa45-4174-801e-a26b9c2b025c/
SH256 hash:
29c14233e9f39489fb1ea7a21c39c916059f2532ea8b1c015f00c84624409576
MD5 hash:
a6071f6bec8bb24bdf9d4275b6587d0e
SHA1 hash:
01c4909c79daa8fe1f47a4a501900354a40c5f90
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/bff25507-fa45-4174-801e-a26b9c2b025c/
Parent samples :
03e727533b2ca8ed0dd10444ce7e95ef19334124fb3014fb090784b2371957b9
35f377ad1b6647c04b0967c7825c96360fe035ae7b0fac43380a1cccc8969d85
95e67dec1a50e9a83fbb5b430c1b21b851e1f0aa8da0ee9efbece3085ad4c462
5b934219ee24cde16acffda6640ac940cfd7f6bdcb93aad90919c89e84343727
b990b5f072914cba8f10f88932ce5be9feff9760f7a1a20d562f885915ca9423
cd238eae8acd5aaece92a1c264437fedea2fd7088df8353d81cdfd6af037e69b
SH256 hash:
35f377ad1b6647c04b0967c7825c96360fe035ae7b0fac43380a1cccc8969d85
MD5 hash:
63436b01bd2affa65b7556ff4042325b
SHA1 hash:
10168e940adfc2040de3fda89b324b2b97b6d011
Link:
https://www.unpac.me/results/bff25507-fa45-4174-801e-a26b9c2b025c/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/35f377ad1b66/report/overview.html
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/35f377ad1b6647c04b0967c7825c96360fe035ae7b0fac43380a1cccc8969d85

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.

Cape
Cape
https://www.capesandbox.com/analysis/271372/

Comments