MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 37f87d9529b496054bc82c319a8908fc82f7704a7de3bc0353a6474995aa02e3. 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 YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 37f87d9529b496054bc82c319a8908fc82f7704a7de3bc0353a6474995aa02e3
SHA3-384 hash: c1f4381184601af6634815fe84e2b5006d9043bfbda40bee23e1711b87196700d02902844c2d77fab3d0c701148d2776
SHA1 hash: 62ddaabfa34733a114afd3668c29feaf9dc96502
MD5 hash: 2b4a1bcc464360c350c05bf9fbb18ce3
humanhash: cold-lima-jupiter-charlie
File name:2b4a1bcc464360c350c05bf9fbb18ce3.exe
Download: download sample
Signature OskiStealer
Create hunting rule
File size:230'200 bytes
First seen:2021-05-03 06:09:42 UTC
Last seen:2021-05-03 13:06:01 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'741 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 6144:Mwyua/xTCGQtfUeAIQHuA36cd0NkS0tO8Q:5yR5TCGQeeAItC6606VtO8Q
Threatray 101 similar samples on MalwareBazaar
TLSH 672401419AD89709C4360A76A9F5C134FB70EF00AC31D6D72C5FF2AA477AB84741CE6A
Reporter abuse_ch
Tags:exe OskiStealer

Intelligence

File Origin
# of uploads :
3
# of downloads :
121
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/148245/
Detection(s):
SecuriteInfo.com.Artemis2B4A1BCC4643.18471.10347.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
DNS request
Sending an HTTP GET request
Sending a UDP 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:
80 / 100
Link:
https://www.joesandbox.com/analysis/707120
Signature
Creates an undocumented autostart registry key
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
Writes to foreign memory regions
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/37f87d9529b496054bc82c319a8908fc82f7704a7de3bc0353a6474995aa02e3/
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2021-05-03 05:12:17 UTC
AV detection:
14 of 47 (29.79%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=g74h3fjjwslaks6ifqyzvcii7sbpo4ckpxr3ya2tuzdutfnkalrq._file
Verdict:
unknown
Similar samples:
381d4a53dc6d69491c703d2f35888b64a675c2b3de8f6572720828dd428a359b
OskiStealer
59a7beab1c7583b7995b157e9e87beb6fa0785c49784bf0b9d13bd143a696541
OskiStealer
654fee180d29661e28f504f62affb32a366e1ba97b01cc8de69854e8bc032b63
OskiStealer
82426d67e219a1d9ac41d9bd9e3d4a74beb90472176320a5ace56d295ce3dd9c
OskiStealer
9f8e2f4d984a481f05c45de6fd4991d8f912166fe3ffa1d299a3719e2e7e82c1
OskiStealer
d5e1923de474408cc5f31650c36345027663f0411bef1e1ef4fa3a2d56bc5d42
OskiStealer
df3dccb8f35520888aad04bdbcba5c3c6e74ff7eac793cb65f2cf45d9be8203d
OskiStealer
ea31b5ce4282473fcb609cdc4c66649b2e79bbe96125b35954c015266f22a95c
OskiStealer
f98f307a6a414fcbe42e1017d720f1ed8c9e0df21b703f74e94dbe1afa8b32ff
OskiStealer
fb91f67073fef8d391ccb08c31183ff2ff00e8a8ca0f71fb5bfce17fb0ddbd26
OskiStealer
+ 91 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-cdt1f3d9te/
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:
834f819f3cca9b9aae6e51f46f4e8b1b9970afc5739542b5d33498275c9613db
MD5 hash:
3df71bc08c264f8be0e9f1bf78210c01
SHA1 hash:
f72661fc7115e17f421ee65e867fbb1515ed4e8d
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/abaa5088-ae88-4ec8-843a-256b4305c24a/
Parent samples :
a5c9be9bcb214e69a39285a634f95e43fdf1ad10536bcc9bce84be7edb48cb31
37f87d9529b496054bc82c319a8908fc82f7704a7de3bc0353a6474995aa02e3
SH256 hash:
32f37430bc3733f6eadcdbbd5afe2acd21a2d65c3671dcf09b2adb1d62214549
MD5 hash:
30312fb17a5f0a3c958a5bf014b96187
SHA1 hash:
81ad1d2b03121e9d034756018433c165d0712737
Link:
https://www.unpac.me/results/abaa5088-ae88-4ec8-843a-256b4305c24a/
SH256 hash:
8552d8c54e35d54f51fde1195135cf6c43e8315aa7cd8ebae54b8fa6aaea759f
MD5 hash:
916a62d393702fe2b255786101823967
SHA1 hash:
31fdbbb49c7275d96e6294451b72fb9131d8f7ac
Link:
https://www.unpac.me/results/abaa5088-ae88-4ec8-843a-256b4305c24a/
SH256 hash:
37f87d9529b496054bc82c319a8908fc82f7704a7de3bc0353a6474995aa02e3
MD5 hash:
2b4a1bcc464360c350c05bf9fbb18ce3
SHA1 hash:
62ddaabfa34733a114afd3668c29feaf9dc96502
Link:
https://www.unpac.me/results/abaa5088-ae88-4ec8-843a-256b4305c24a/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/37f87d9529b496054bc82c319a8908fc82f7704a7de3bc0353a6474995aa02e3

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.

Web download

OskiStealer

Executable exe 37f87d9529b496054bc82c319a8908fc82f7704a7de3bc0353a6474995aa02e3

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1187704/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/148245/

Comments