MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 9b26547086a1489e5534452021694af3a565fe76926e671112be4852947a5d27. 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: 8


Intelligence 8 IOCs 1 YARA 7 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 9b26547086a1489e5534452021694af3a565fe76926e671112be4852947a5d27
SHA3-384 hash: 88d7d675d63963ced5af45384c60461597e399570dd59d3352b6de420cea6a2f1f01f7832383cf522c886d4511a6fc5e
SHA1 hash: 02f9a41a35cc4794456fbc48b8e0245e622eab69
MD5 hash: e05e738dcb98a9f8c125138b492f82e5
humanhash: item-william-seven-carpet
File name:e05e738dcb98a9f8c125138b492f82e5.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:390'456 bytes
First seen:2021-04-26 06:21:06 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'653 x AgentTesla, 19'464 x Formbook, 12'205 x SnakeKeylogger)
ssdeep 6144:MHQYxtfUeAIQHuA36cd92HPNh7C9UKjn+TvhRG:DYxeeAItC669ar7CeVpA
Threatray 1'034 similar samples on MalwareBazaar
TLSH F484A178FDFF6985C210DE3A66AC705A06E19C58CE9B837BE0D472A47E30DC81A4651F
Reporter abuse_ch
Tags:exe OskiStealer


Avatar
abuse_ch
OskiStealer C2:
http://osiq.icu/6.jpg

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://osiq.icu/6.jpg https://threatfox.abuse.ch/ioc/10018/

Intelligence

File Origin
# of uploads :
1
# of downloads :
129
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
e05e738dcb98a9f8c125138b492f82e5.exe
Verdict:
No threats detected
Analysis date:
2021-04-26 06:24:44 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/43b155bf-2c15-4a78-a254-ee1a26924fad

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/144214/
Detection(s):
SecuriteInfo.com.Trojan.MSIL.Inject.9666.7294.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
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.
Result
Threat name:
Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/697371
Signature
Creates an undocumented autostart registry key
Downloads files with wrong headers with respect to MIME Content-Type
Found many strings related to Crypto-Wallets (likely being stolen)
Injects a PE file into a foreign processes
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 Costura Assembly Loader
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 397607 Sample: BzRAchaxHS.exe Startdate: 26/04/2021 Architecture: WINDOWS Score: 100 41 Multi AV Scanner detection for dropped file 2->41 43 Multi AV Scanner detection for submitted file 2->43 45 Yara detected Vidar stealer 2->45 47 5 other signatures 2->47 8 BzRAchaxHS.exe 8 2->8         started        process3 file4 23 C:\Users\user\AppData\Roaming\...\notpad.exe, PE32 8->23 dropped 25 C:\Users\user\AppData\...\BzRAchaxHS.exe, PE32 8->25 dropped 27 C:\Users\...\BzRAchaxHS.exe:Zone.Identifier, ASCII 8->27 dropped 29 C:\Users\user\AppData\...\BzRAchaxHS.exe.log, ASCII 8->29 dropped 49 Creates an undocumented autostart registry key 8->49 51 Writes to foreign memory regions 8->51 53 Injects a PE file into a foreign processes 8->53 12 BzRAchaxHS.exe 193 8->12         started        signatures5 process6 dnsIp7 39 osiq.icu 45.15.143.157, 49747, 80 DEDIPATH-LLCUS Latvia 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 55 Multi AV Scanner detection for dropped file 12->55 57 Tries to harvest and steal browser information (history, passwords, etc) 12->57 59 Tries to steal Crypto Currency Wallets 12->59 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/9b26547086a1489e5534452021694af3a565fe76926e671112be4852947a5d27/
Threat name:
Win32.Trojan.Pwsx
Create hunting rule
Status:
Malicious
First seen:
2021-04-26 06:22:09 UTC
AV detection:
7 of 47 (14.89%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=tmtfi4egufej4vjuiuqcc2kk6oswl7twsjxgoeisxzefffd2lutq._file
Verdict:
malicious
Similar samples:
40afa1e323be151d0d7a38c72f771b0b9e909f49ddade942d4260a5e29e5ec2f
OskiStealer
5069de588ac1f23d1cfa14c3ee61e5bc351d0314a5bbac248a5210a9db7e5a8c
OskiStealer
5389a958986f6ceccaa9e44006852becbccabfb07f126d69e6b031227fb0b487
OskiStealer
614ea8187654128fc27a51455ab3c8fdbb6d398382cd4d825cf795dbbf5d7966
OskiStealer
69fe5bb4b975f9437b6c3bcf3f07dc807a8f2e848f1e0c5802012295b06a742c
OskiStealer
b2a66114f2afb03bd4087e7fc37d6c89ff7f3d3bd48d751dc9334a5a746f7c37
OskiStealer
c0ff93ef4930a7dc2d95a6ee490fecdddcbe946e479b1d4fdb47285245b28675
OskiStealer
d217032899487162688fa6c3855e13040b074de38d9c57c91b47c1190842edc2
OskiStealer
d40dedd7f637a1ef9703b582a6d536469d1cf62bddc1a462a9cceeb7f9194f13
OskiStealer
d5825a48b525fa8f664ff98a98aec5164bbccab0a1bad2d17bb2aafebd148ffa
OskiStealer
+ 1'024 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/210426-4x58baadvs/
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
Unpacked files
SH256 hash:
ebb4c7a8527658d4f02f6242d0a4a518e5881ac4b89ee7036cc8464214a66811
MD5 hash:
9766c14be8e0d0a3e027c63fa097b55b
SHA1 hash:
c96561c8f8aa14db919676b8e84bccb581436db7
Link:
https://www.unpac.me/results/bde71e4c-d545-43d0-ac8e-7ea35f8d4931/
SH256 hash:
5a63a5027a07bce00098e33e673f61749afd7af0029645d64d4680c2ec3c0225
MD5 hash:
2888834013b405be23eed01595f647e9
SHA1 hash:
704c2b62e7de695c6482f58d9fe4d0d064796c37
Link:
https://www.unpac.me/results/bde71e4c-d545-43d0-ac8e-7ea35f8d4931/
SH256 hash:
64ab079f46d1af5e9c9804b929e31d90bde1003585017218b6964bdb20ad8375
MD5 hash:
e7adf5ed1982d6bc2ca710c425352d59
SHA1 hash:
011b372dbb6cc577e1393a4c43c28728314e38b3
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/bde71e4c-d545-43d0-ac8e-7ea35f8d4931/
SH256 hash:
9b26547086a1489e5534452021694af3a565fe76926e671112be4852947a5d27
MD5 hash:
e05e738dcb98a9f8c125138b492f82e5
SHA1 hash:
02f9a41a35cc4794456fbc48b8e0245e622eab69
Link:
https://www.unpac.me/results/bde71e4c-d545-43d0-ac8e-7ea35f8d4931/
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/9b26547086a1489e5534452021694af3a565fe76926e671112be4852947a5d27

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:dsc
Create hunting rule
Author:Aaron DeVera
Description:Discord domains
Rule name:INDICATOR_KB_CERT_04f131322cc31d92c849fca351d2f141
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: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
Rule name:win_oski_g0
Create hunting rule
Author:Slavo Greminger, SWITCH-CERT

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Web download

OskiStealer

Executable exe 9b26547086a1489e5534452021694af3a565fe76926e671112be4852947a5d27

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1169803/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/144214/

Comments