MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 758353a1ee13e2b4e82bd4ebfa6df47a12a3ac2d488d9602bb89700a4dc6b997. 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 7 YARA 3 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 758353a1ee13e2b4e82bd4ebfa6df47a12a3ac2d488d9602bb89700a4dc6b997
SHA3-384 hash: a1542eda240ef65d2af92df5542ff88388790cf1ff36867c6fbf7ab672b8cda790a327b476208827c36a5e8da48a0356
SHA1 hash: f560b9b2d7cd4d2429534579f28ce37b0b9bb8f1
MD5 hash: 1903d35890dd11315dcc8f9035baf6f8
humanhash: pip-uncle-idaho-victor
File name:P.O# 70058629.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:250'515 bytes
First seen:2021-05-11 00:46:08 UTC
Last seen:2021-05-11 02:50:21 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash ced282d9b261d1462772017fe2f6972b (127 x Formbook, 113 x GuLoader, 70 x RemcosRAT)
ssdeep 6144:L9X0GgaejoDOW+htlAvwPThVWyizGn5ZlDhT1AYTDFxee++lfttDKpKDyji:l0Va+5tFThV1+G5YUDW3Kfn+KDyji
Threatray 5'953 similar samples on MalwareBazaar
TLSH 683412560E60FEF3E4B606325DBB8A2FDFC5925810A52B0753644F5EBE139C78B1E281
Reporter abuse_ch
Tags:exe OskiStealer


Avatar
abuse_ch
OskiStealer C2:
http://31.210.21.193/6.jpg

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://31.210.21.193/6.jpg https://threatfox.abuse.ch/ioc/35058/
http://31.210.21.193/1.jpg https://threatfox.abuse.ch/ioc/35059/
http://31.210.21.193/2.jpg https://threatfox.abuse.ch/ioc/35060/
http://31.210.21.193/3.jpg https://threatfox.abuse.ch/ioc/35061/
http://31.210.21.193/4.jpg https://threatfox.abuse.ch/ioc/35062/
http://31.210.21.193/5.jpg https://threatfox.abuse.ch/ioc/35063/
http://31.210.21.193/7.jpg https://threatfox.abuse.ch/ioc/35064/

Intelligence

File Origin
# of uploads :
3
# of downloads :
134
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Vidar
Create hunting rule
Link:
https://www.capesandbox.com/analysis/154603/
Detection(s):
SecuriteInfo.com.Gen.Variant.Androm.29.13.4516.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file in the %temp% directory
Creating a file
Modifying a system executable file
Sending a UDP request
Deleting a recently created file
Reading critical registry keys
Replacing files
Delayed writing of the file
DNS request
Sending an HTTP GET request
Changing the Zone.Identifier stream
Creating a process from a recently created file
Creating a process with a hidden window
Running batch commands
Using the Windows Management Instrumentation requests
Searching for the window
Unauthorized injection to a recently created process
Stealing user critical data
Unauthorized injection to a recently created process by context flags manipulation
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:
AgentTesla Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/777983
Signature
Creates files in alternative data streams (ADS)
Detected unpacking (changes PE section rights)
Detected unpacking (creates a PE file in dynamic memory)
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
Posts data to a JPG file (protocol mismatch)
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal ftp login credentials
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Crypto Currency Wallets
Tries to steal Mail credentials (via file access)
Yara detected AgentTesla
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 410379 Sample: P.O# 70058629.exe Startdate: 11/05/2021 Architecture: WINDOWS Score: 100 49 Found malware configuration 2->49 51 Detected unpacking (changes PE section rights) 2->51 53 Detected unpacking (overwrites its own PE header) 2->53 55 9 other signatures 2->55 8 P.O# 70058629.exe 18 2->8         started        process3 file4 33 C:\Users\user\AppData\Local\...\y332e.dll, PE32 8->33 dropped 73 Maps a DLL or memory area into another process 8->73 12 P.O# 70058629.exe 200 8->12         started        signatures5 process6 dnsIp7 45 31.210.21.193, 49736, 80 PLUSSERVER-ASN1DE Netherlands 12->45 47 premcogroup.com 162.214.101.129, 49741, 80 UNIFIEDLAYER-AS-1US United States 12->47 35 C:\Users\user\AppData\Local\...\suited[1].exe, PE32 12->35 dropped 37 C:\ProgramData\300538058227.exe, PE32 12->37 dropped 39 C:\...\300538058227.exe:Zone.Identifier, ASCII 12->39 dropped 41 7 other files (none is malicious) 12->41 dropped 75 Creates files in alternative data streams (ADS) 12->75 77 Tries to harvest and steal browser information (history, passwords, etc) 12->77 79 Tries to steal Crypto Currency Wallets 12->79 17 300538058227.exe 18 12->17         started        21 cmd.exe 1 12->21         started        file8 signatures9 process10 file11 31 C:\Users\user\AppData\...\evc0u3o20qb7.dll, PE32 17->31 dropped 57 Detected unpacking (changes PE section rights) 17->57 59 Detected unpacking (creates a PE file in dynamic memory) 17->59 61 Detected unpacking (overwrites its own PE header) 17->61 63 4 other signatures 17->63 23 300538058227.exe 2 17->23         started        27 taskkill.exe 1 21->27         started        29 conhost.exe 21->29         started        signatures12 process13 dnsIp14 43 smtp.privateemail.com 199.193.7.228, 49764, 587 NAMECHEAP-NETUS United States 23->43 65 Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc) 23->65 67 Tries to steal Mail credentials (via file access) 23->67 69 Tries to harvest and steal ftp login credentials 23->69 71 Tries to harvest and steal browser information (history, passwords, etc) 23->71 signatures15
Detection:
agenttesla
Create hunting rule
Link:
https://mwdb.cert.pl/sample/758353a1ee13e2b4e82bd4ebfa6df47a12a3ac2d488d9602bb89700a4dc6b997/
Threat name:
Win32.Trojan.SpyNoon
Create hunting rule
Status:
Malicious
First seen:
2021-05-11 00:46:19 UTC
AV detection:
22 of 47 (46.81%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=owbvhipocprlj2bl2tv7u3pupijkhlbnjcgzmav3rfyautogxglq._file
Verdict:
malicious
Label(s):
agenttesla
Create hunting rule
Similar samples:
244cc88debf6465b93584d1f63c592c52bd029deec2f24fc4a3328725838d239
OskiStealer
3aeccf51ec935646a4987a1683d5dd8a251d171d326041282759753e371dff4f
OskiStealer
604e8bce3d31f5e04fe9622cedeb0696a69b9cb7f262a9bb33009ede20df100a
OskiStealer
69fe5bb4b975f9437b6c3bcf3f07dc807a8f2e848f1e0c5802012295b06a742c
OskiStealer
9b26547086a1489e5534452021694af3a565fe76926e671112be4852947a5d27
OskiStealer
a68ec0c26f99b4f59d0abbd7cc98de6d9136ffe0d822d8056476d356121e5011
OskiStealer
c0ff93ef4930a7dc2d95a6ee490fecdddcbe946e479b1d4fdb47285245b28675
OskiStealer
cb24694242c1c1618678711184ab8abe6a1335d348f3549d2b568d99f793bf28
OskiStealer
cc4c6be7a609aaaabf82ae1cd164c567ff7f7cc1ebdb59175d0ae1ecbac74b5c
OskiStealer
db127ccf5ea69c0bc3888efe5ae2a532c5f5590a2f589f049139fcf63f5e8062
OskiStealer
+ 5'943 additional samples on MalwareBazaar
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla family:oski discovery infostealer keylogger spyware stealer trojan
Link:
https://tria.ge/reports/210511-97wvqkl8rj/
Behaviour
Checks processor information in registry
Kills process with taskkill
NTFS ADS
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
NSIS installer
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Checks installed software on the system
Loads dropped DLL
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
Downloads MZ/PE file
Executes dropped EXE
AgentTesla Payload
AgentTesla
Oski
Malware Config
C2 Extraction:
31.210.21.193
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/758353a1ee13e2b4e82bd4ebfa6df47a12a3ac2d488d9602bb89700a4dc6b997

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
Create hunting rule
Author:ditekSHen
Description:Detects Vidar / ArkeiStealer
Rule name:Vidar
Create hunting rule
Author:kevoreilly
Description:Vidar Payload
Rule name:win_oski_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator

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/154603/

Comments


Avatar
a̵c̵c̸i̵d̷e̵n̷t̴a̷l̴r̵e̷b̸e̴l̸ commented on 2021-05-11 00:59:34 UTC

============================================================
MBC behaviors list (github.com/accidentalrebel/mbcscan):
============================================================
0) [B0001.032] Anti-Behavioral Analysis::Timing/Delay Check GetTickCount
1) [C0032.001] Data Micro-objective::CRC32::Checksum
2) [C0026.002] Data Micro-objective::XOR::Encode Data
5) [C0045] File System Micro-objective::Copy File
6) [C0046] File System Micro-objective::Create Directory
7) [C0048] File System Micro-objective::Delete Directory
8) [C0047] File System Micro-objective::Delete File
9) [C0049] File System Micro-objective::Get File Attributes
10) [C0051] File System Micro-objective::Read File
11) [C0050] File System Micro-objective::Set File Attributes
12) [C0052] File System Micro-objective::Writes File
13) [E1510] Impact::Clipboard Modification
14) [C0034.001] Operating System Micro-objective::Set Variable::Environment Variable
15) [C0036.004] Operating System Micro-objective::Create Registry Key::Registry
16) [C0036.002] Operating System Micro-objective::Delete Registry Key::Registry
17) [C0036.007] Operating System Micro-objective::Delete Registry Value::Registry
18) [C0036.003] Operating System Micro-objective::Open Registry Key::Registry
19) [C0036.005] Operating System Micro-objective::Query Registry Key::Registry
20) [C0036.006] Operating System Micro-objective::Query Registry Value::Registry
21) [C0036.001] Operating System Micro-objective::Set Registry Key::Registry
22) [C0017] Process Micro-objective::Create Process
23) [C0038] Process Micro-objective::Create Thread
24) [C0018] Process Micro-objective::Terminate Process