MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 71ba20bdd899fde2a4e2967bc6c719f2c96146cc80c3dd8953431cb82d4df199. 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: 9


Intelligence 9 IOCs 7 YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 71ba20bdd899fde2a4e2967bc6c719f2c96146cc80c3dd8953431cb82d4df199
SHA3-384 hash: c84763af38ffb2e90320ca009cdc904950d56b82d9a8bb62150092995f9f0f9fedf4ceb5a3b3ba78e555d05c148c140f
SHA1 hash: 2448b57e97a917d01993c89b901ad2c21d413792
MD5 hash: 059e79d36927bb230e90376aa7528015
humanhash: arizona-failed-double-romeo
File name:DHL_119040 Beleg.ppt
Download: download sample
Signature OskiStealer
Create hunting rule
File size:82'944 bytes
First seen:2021-07-16 15:17:42 UTC
Last seen:2021-07-26 10:35:39 UTC
File type:PowerPoint file ppt
MIME type:application/vnd.ms-powerpoint
ssdeep 768:EvV9mdLakIT0fSCmwypPtV2RLcicHw6no37p8hcjo:ENemwypPGkHV
TLSH T104839455B285D1AAC07A4E368DDAD2FE7734FC409D11C32B3294732F2D7A6918F12AC4
Reporter lowmal3
Tags:aggah DHL haggah OskiStealer ppt

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://103.153.76.164/we/bles//6.jpg https://threatfox.abuse.ch/ioc/160806/
http://103.153.76.164/we/bles//1.jpg https://threatfox.abuse.ch/ioc/160807/
http://103.153.76.164/we/bles//2.jpg https://threatfox.abuse.ch/ioc/160808/
http://103.153.76.164/we/bles//3.jpg https://threatfox.abuse.ch/ioc/160809/
http://103.153.76.164/we/bles//4.jpg https://threatfox.abuse.ch/ioc/160810/
http://103.153.76.164/we/bles//5.jpg https://threatfox.abuse.ch/ioc/160811/
http://103.153.76.164/we/bles//7.jpg https://threatfox.abuse.ch/ioc/160812/

Intelligence

File Origin
# of uploads :
4
# of downloads :
265
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
DHL_119040 Beleg.ppt
Verdict:
Malicious activity
Analysis date:
2021-07-16 15:18:57 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/39a90543-30d8-4a49-af8e-c78b10e95d4a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
TwinWave.EvilDoc.DOCXSTRGOOD.HTTPS
Create hunting rule

Result
Verdict:
Malicious
File Type:
Legacy PowerPoint File with Macro
Link:
https://app.docguard.net/71ba20bdd899fde2a4e2967bc6c719f2c96146cc80c3dd8953431cb82d4df199/results/dashboard
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/71ba20bdd899fde2a4e2967bc6c719f2c96146cc80c3dd8953431cb82d4df199
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Macro Contains Suspicious String
Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...
Macro with DLL Reference
Detected macro logic that will load additional functionality from Dynamically Linked Libraries (DLLs). While not explicitly malicious, this is a common tactic for accessing APIs that are not otherwised exposed via Visual Basic for Applications (VBA).
Result
Threat name:
Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
expl.evad.troj.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/817551
Signature
Creates a scheduled task launching mshta.exe (likely to bypass HIPS)
DLL side loading technique detected
Document contains an embedded VBA macro which may execute processes
Document contains an embedded VBA macro with suspicious strings
Document contains an embedded VBA with functions possibly related to WSH operations (process, registry, environment, or keystrokes)
Document exploit detected (process start blacklist hit)
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
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for submitted file
Posts data to a JPG file (protocol mismatch)
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: MSHTA Spawning Windows Shell
Sigma detected: Suspicious Process Start Without DLL
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
Writes or reads registry keys via WMI
Writes registry values via WMI
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected MSILLoadEncryptedAssembly
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 449962 Sample: DHL_119040 Beleg.ppt Startdate: 16/07/2021 Architecture: WINDOWS Score: 100 99 Multi AV Scanner detection for domain / URL 2->99 101 Found malware configuration 2->101 103 Multi AV Scanner detection for submitted file 2->103 105 15 other signatures 2->105 11 cmd.exe 4 2 2->11         started        13 powershell.exe 2->13         started        17 powershell.exe 2->17         started        19 2 other processes 2->19 process3 dnsIp4 21 POWERPNT.EXE 11 19 11->21         started        24 conhost.exe 11->24         started        91 192.168.2.1 unknown unknown 13->91 125 Writes to foreign memory regions 13->125 127 Injects a PE file into a foreign processes 13->127 26 RegSvcs.exe 13->26         started        29 conhost.exe 13->29         started        93 ia801405.us.archive.org 207.241.228.145, 443, 49742, 49750 INTERNET-ARCHIVEUS United States 17->93 31 RegSvcs.exe 17->31         started        34 conhost.exe 17->34         started        36 RegSvcs.exe 17->36         started        signatures5 process6 dnsIp7 73 C:\Users\user\...\~$DHL_119040 Beleg.ppt, data 21->73 dropped 75 C:\Users\user\...\DHL_119040 Beleg.ppt.LNK, MS 21->75 dropped 38 mshta.exe 2 57 21->38         started        77 C:\ProgramData\sqlite3.dll, PE32 26->77 dropped 79 C:\ProgramData\vcruntime140.dll, PE32 26->79 dropped 81 C:\ProgramData\softokn3.dll, PE32 26->81 dropped 83 4 other files (none is malicious) 26->83 dropped 115 Tries to harvest and steal browser information (history, passwords, etc) 26->115 117 DLL side loading technique detected 26->117 119 Tries to steal Crypto Currency Wallets 26->119 42 cmd.exe 26->42         started        97 103.153.76.164, 49744, 49752, 49753 TWIDC-AS-APTWIDCLimitedHK unknown 31->97 44 cmd.exe 31->44         started        file8 signatures9 process10 dnsIp11 85 blogspot.l.googleusercontent.com 142.250.184.193, 443, 49726 GOOGLEUS United States 38->85 87 bitly.com 67.199.248.14, 443, 49724, 49725 GOOGLE-PRIVATE-CLOUDUS United States 38->87 89 4 other IPs or domains 38->89 107 Uses schtasks.exe or at.exe to add and modify task schedules 38->107 109 Creates a scheduled task launching mshta.exe (likely to bypass HIPS) 38->109 111 Writes or reads registry keys via WMI 38->111 113 Writes registry values via WMI 38->113 46 powershell.exe 15 17 38->46         started        50 schtasks.exe 1 38->50         started        52 conhost.exe 42->52         started        54 taskkill.exe 42->54         started        56 conhost.exe 44->56         started        58 taskkill.exe 44->58         started        signatures12 process13 dnsIp14 95 ia801405.us.archive.org 46->95 129 Writes to foreign memory regions 46->129 131 Injects a PE file into a foreign processes 46->131 60 RegSvcs.exe 46->60         started        63 conhost.exe 46->63         started        65 conhost.exe 50->65         started        signatures15 process16 signatures17 121 DLL side loading technique detected 60->121 123 Tries to steal Crypto Currency Wallets 60->123 67 cmd.exe 60->67         started        process18 process19 69 conhost.exe 67->69         started        71 taskkill.exe 67->71         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/71ba20bdd899fde2a4e2967bc6c719f2c96146cc80c3dd8953431cb82d4df199/
Threat name:
Binary.Trojan.Valyria
Create hunting rule
Status:
Malicious
First seen:
2021-07-16 15:18:03 UTC
AV detection:
3 of 46 (6.52%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=og5cbpoyth66fjhcsz54nryz6lewcrwmqdb53cktimolqlkn6gmq._file
Result
Malware family:
oski
Create hunting rule
Score:
  10/10
Tags:
family:oski infostealer macro spyware
Link:
https://tria.ge/reports/210716-asz6da2a46/
Behaviour
Checks processor information in registry
Creates scheduled task(s)
Enumerates system info in registry
Kills process with taskkill
Modifies Internet Explorer settings
Modifies registry class
Modifies system certificate store
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Accesses cryptocurrency files/wallets, possible credential harvesting
Process spawned suspicious child process
Loads dropped DLL
Blocklisted process makes network request
Downloads MZ/PE file
Oski
Process spawned unexpected child process
Malware Config
C2 Extraction:
103.153.76.164/we/bles/
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/71ba20bdd899fde2a4e2967bc6c719f2c96146cc80c3dd8953431cb82d4df199

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_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:TA505_Maldoc_21Nov_2
Create hunting rule
Author:Arkbird_SOLG
Description:invitation (1).xls
Reference:https://twitter.com/58_158_177_102/status/1197432303057637377

File information

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

Malspam

OskiStealer

PowerPoint file ppt 71ba20bdd899fde2a4e2967bc6c719f2c96146cc80c3dd8953431cb82d4df199

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments