MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5e90997364ac5c40a3c374faa4a11c74e9d040e42c10a2dcab169818e1d717b5. 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: 7


Intelligence 7 IOCs 7 YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 5e90997364ac5c40a3c374faa4a11c74e9d040e42c10a2dcab169818e1d717b5
SHA3-384 hash: 1ecb280333756f6ca53a9be2da43d523d19e5c07aff7f4f7574de6628d6dc00a963c1c193ffec9c7a9579eadbfe385a4
SHA1 hash: 3c1ec410dcdb4992e58c20a215354fb3714b2b28
MD5 hash: 0e444899ae75dd87e33621fd953ed450
humanhash: virginia-march-three-oven
File name:IMG602741105.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:230'712 bytes
First seen:2021-05-03 14:01:07 UTC
Last seen:2021-05-03 15:02:34 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 6144:6RuVYrRG55tfUeAIQHuA36cdWFc/TVSMWiG:SuPXeeAItC66WFIVZ
Threatray 93 similar samples on MalwareBazaar
TLSH 363402405AD8CB0EC5300A3AEEF5D238BB30BF01A821E6C75D5FF2965735B64B458E5A
Reporter abuse_ch
Tags:exe OskiStealer


Avatar
abuse_ch
OskiStealer C2:
http://198.98.49.140/6.jpg

Indicators Of Compromise (IOCs)

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

IOCThreatFox Reference
http://198.98.49.140/6.jpg https://threatfox.abuse.ch/ioc/28249/
http://198.98.49.140/1.jpg https://threatfox.abuse.ch/ioc/28250/
http://198.98.49.140/2.jpg https://threatfox.abuse.ch/ioc/28251/
http://198.98.49.140/3.jpg https://threatfox.abuse.ch/ioc/28252/
http://198.98.49.140/4.jpg https://threatfox.abuse.ch/ioc/28253/
http://198.98.49.140/5.jpg https://threatfox.abuse.ch/ioc/28254/
http://198.98.49.140/7.jpg https://threatfox.abuse.ch/ioc/28255/

Intelligence

File Origin
# of uploads :
3
# of downloads :
103
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/148523/
Detection(s):
SecuriteInfo.com.Artemis0E444899AE75.4610.26449.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
DNS request
Sending an HTTP GET request
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/708012
Signature
Creates an undocumented autostart registry key
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
Posts data to a JPG file (protocol mismatch)
Sigma detected: BlueMashroom DLL Load
Sigma detected: EvilNum Golden Chickens Deployment via OCX Files
Sigma detected: Koadic Execution
Sigma detected: NotPetya Ransomware Activity
Sigma detected: Raccine Uninstall
Sigma detected: System File Execution Location Anomaly
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Crypto Currency Wallets
Writes to foreign memory regions
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 402925 Sample: IMG602741105.exe Startdate: 03/05/2021 Architecture: WINDOWS Score: 100 42 Found malware configuration 2->42 44 Yara detected Vidar stealer 2->44 46 Sigma detected: BlueMashroom DLL Load 2->46 48 8 other signatures 2->48 8 IMG602741105.exe 15 8 2->8         started        process3 dnsIp4 38 launcher.worldofwarcraft.com 137.221.106.103, 49724, 80 BLIZZARDEU United Kingdom 8->38 24 C:\Users\user\AppData\...\IMG602741105.exe, PE32 8->24 dropped 26 C:\Users\...\IMG602741105.exe:Zone.Identifier, ASCII 8->26 dropped 28 C:\Users\user\AppData\Roaming\...\notpad.exe, PE32 8->28 dropped 50 Creates an undocumented autostart registry key 8->50 52 Writes to foreign memory regions 8->52 54 Injects a PE file into a foreign processes 8->54 13 IMG602741105.exe 193 8->13         started        file5 signatures6 process7 dnsIp8 40 198.98.49.140, 49736, 80 PONYNETUS United States 13->40 30 C:\ProgramData\vcruntime140.dll, PE32 13->30 dropped 32 C:\ProgramData\sqlite3.dll, PE32 13->32 dropped 34 C:\ProgramData\softokn3.dll, PE32 13->34 dropped 36 4 other files (none is malicious) 13->36 dropped 56 Tries to harvest and steal browser information (history, passwords, etc) 13->56 58 Tries to steal Crypto Currency Wallets 13->58 18 cmd.exe 1 13->18         started        file9 signatures10 process11 process12 20 taskkill.exe 1 18->20         started        22 conhost.exe 18->22         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/5e90997364ac5c40a3c374faa4a11c74e9d040e42c10a2dcab169818e1d717b5/
Threat name:
ByteCode-MSIL.Trojan.Chapak
Create hunting rule
Status:
Malicious
First seen:
2021-05-03 14:02:10 UTC
AV detection:
18 of 29 (62.07%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=l2ijs43evroebi6dot5kjii4otu5aqhefqikfxflc2mbryoxc62q._file
Verdict:
unknown
Similar samples:
1860347130f68ba0d084750816ca0fc532b8647d89e36ff53c0355e73a46d332
OskiStealer
37f87d9529b496054bc82c319a8908fc82f7704a7de3bc0353a6474995aa02e3
OskiStealer
60ef6cebb8be31d48b6d182a5df9597a74e0978c3bae05a43167775deba9199c
OskiStealer
654fee180d29661e28f504f62affb32a366e1ba97b01cc8de69854e8bc032b63
OskiStealer
916bd03b40de6bfa498311e3a70d3e98c50e8255fd413d446daab77951224856
OskiStealer
9f8e2f4d984a481f05c45de6fd4991d8f912166fe3ffa1d299a3719e2e7e82c1
OskiStealer
d5e1923de474408cc5f31650c36345027663f0411bef1e1ef4fa3a2d56bc5d42
OskiStealer
df3dccb8f35520888aad04bdbcba5c3c6e74ff7eac793cb65f2cf45d9be8203d
OskiStealer
ea31b5ce4282473fcb609cdc4c66649b2e79bbe96125b35954c015266f22a95c
OskiStealer
f98f307a6a414fcbe42e1017d720f1ed8c9e0df21b703f74e94dbe1afa8b32ff
OskiStealer
+ 83 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/210503-gwyvbn5wva/
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:
188bd0ae605d3cb14279b9fc4c3dbcc8619e96eddc8ab1743c716d7dbae73466
MD5 hash:
bfa60af37152184aa9ab35927cdbfd54
SHA1 hash:
9fb2c87c10f850f76bf37200cbe96aa72f52fe89
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/f53052ec-f2c9-48e6-8039-60c22c49e925/
Parent samples :
5e90997364ac5c40a3c374faa4a11c74e9d040e42c10a2dcab169818e1d717b5
04739bba7ef80f72f47dd22eb66b9fddb6f48b5c3744b1f9cc6018615aa11bd6
SH256 hash:
96ddb3e43d7408fbc638085ac5ef6da7a56474b46d33ceadc9515813045d8e48
MD5 hash:
e12d00bf21f33bd07d086224219f13ca
SHA1 hash:
8c69fa934a64e6cbf522167bd4e414c36cac0322
Link:
https://www.unpac.me/results/f53052ec-f2c9-48e6-8039-60c22c49e925/
SH256 hash:
32f37430bc3733f6eadcdbbd5afe2acd21a2d65c3671dcf09b2adb1d62214549
MD5 hash:
30312fb17a5f0a3c958a5bf014b96187
SHA1 hash:
81ad1d2b03121e9d034756018433c165d0712737
Link:
https://www.unpac.me/results/f53052ec-f2c9-48e6-8039-60c22c49e925/
SH256 hash:
5e90997364ac5c40a3c374faa4a11c74e9d040e42c10a2dcab169818e1d717b5
MD5 hash:
0e444899ae75dd87e33621fd953ed450
SHA1 hash:
3c1ec410dcdb4992e58c20a215354fb3714b2b28
Link:
https://www.unpac.me/results/f53052ec-f2c9-48e6-8039-60c22c49e925/
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/5e90997364ac5c40a3c374faa4a11c74e9d040e42c10a2dcab169818e1d717b5

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: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/148523/

Comments