MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 242acd2bd4415b211de8afd058570aac478e1c257d31e908a2823b8fb3788ede. 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: 12


Intelligence 12 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 242acd2bd4415b211de8afd058570aac478e1c257d31e908a2823b8fb3788ede
SHA3-384 hash: d61d90d51664e6bec791ee27d7d35de8ac87324c3277d319db0560a20347d062a447cecd992f679e72c20ed5fe0d452b
SHA1 hash: be7905986d224b15517c5b41d4fc30fec309bd8e
MD5 hash: 7cdabce07469c95df2bfe4bb692757d5
humanhash: april-cat-high-avocado
File name:DOC98374933_JULY2021.EXE
Download: download sample
Signature OskiStealer
Create hunting rule
File size:1'181'184 bytes
First seen:2021-07-22 12:00:42 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'741 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:L0GiqKFs/QF1NnQKO4DvL7hcomsEZPBUzOlCNmQOk09lIhZ2B9syaUVKnplRjG0R:B6F9FHnQKOO6z59lymqkcmzahpr7R
Threatray 1'713 similar samples on MalwareBazaar
TLSH T13D455C2AB303D080FE6D15B2CDE4FBF0051BFC2BCA0E991715953E96B477AAE1676142
dhash icon 71f0f0d4ccccf070 (8 x AgentTesla, 3 x Formbook, 2 x SnakeKeylogger)
Reporter cocaman
Tags:exe OskiStealer

Intelligence

File Origin
# of uploads :
1
# of downloads :
122
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
DOC98374933_JULY2021.EXE
Verdict:
Malicious activity
Analysis date:
2021-07-22 12:08:46 UTC
Tags:
trojan stealer vidar loader phishing
Link:
https://app.any.run/tasks/5b188b00-ee14-4eb3-97f0-195ac27df2ac

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Vidar
Create hunting rule
Link:
https://www.capesandbox.com/analysis/173300/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.935-1.UNOFFICIAL
Create hunting rule

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.
Malware family:
Oski Stealer
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/b25cd604-e5a5-4194-95e6-67824e31c507
Result
Threat name:
Oski Vidar
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/820090
Signature
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
Machine Learning detection for sample
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Posts data to a JPG file (protocol mismatch)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Crypto Currency Wallets
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Download SVG
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/242acd2bd4415b211de8afd058570aac478e1c257d31e908a2823b8fb3788ede/
Threat name:
ByteCode-MSIL.Trojan.Tnega
Create hunting rule
Status:
Malicious
First seen:
2021-07-22 12:01:06 UTC
File Type:
PE (.Net Exe)
Extracted files:
18
AV detection:
17 of 28 (60.71%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=eqvm2k6uifnschpiv7ifqvykvrdy4hbfpuy6scfcqi5y7m3yr3pa._file
Verdict:
malicious
Similar samples:
0768e83e8d36f21ea90867dcf3935ee48795daf2e4a0017979e752b865c95d9e
OskiStealer
12f5634cd28b25f6dcde9a1d7902d64ab4ded48b50e06e4ec0f583e03a156125
OskiStealer
138ccd9e494958214619110418407a634db9d8b073be4ffcd7d23083b58fb945
OskiStealer
37f96df377557cad9bdb2caa4064bbf4dd862e935a64e1d802d445358695e15c
OskiStealer
3cabdecbde62bcbd0f3528e45decf78d85e1b1d827a9cd19bb3cc1371d0cacae
OskiStealer
4b550c500aae1686f38edfc7e28fe3a7939b997e01ee73a432c0caa7ea69892b
OskiStealer
5f55898f4f260025ec6507f92ed128dcd90f5f83d14b507282352f4c79fb71bc
OskiStealer
b2454961c84e927b086719e0bae8016bee823e17402fb0feca8bda4e63ff009c
OskiStealer
c41aa6d6eeac57851b0a00a619609ed764072881b85b7dad25ac30f2856eda43
OskiStealer
f2fcd49dd7ce2e64415e73f5276e813e90d53dea18f5fba68e1c8b55e0c1f631
OskiStealer
+ 1'703 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/210722-bk613gyw8e/
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
Malware Config
C2 Extraction:
kckark.xyz
Unpacked files
SH256 hash:
f627dc3b869d2e6cdbae8384fd2a8b6a0f09a678dc95306f38f32614be6d6856
MD5 hash:
192515ef7d44c00aebbc7e4802c43a86
SHA1 hash:
6fb2671bb37fc9e7cd49e564be88dd92ef956acf
Detections:
win_oski_g0
Create hunting rule
win_oski_auto
Create hunting rule
Link:
https://www.unpac.me/results/e8b6d9eb-d2c1-4876-86b9-444637537bc7/
Parent samples :
242acd2bd4415b211de8afd058570aac478e1c257d31e908a2823b8fb3788ede
06c8a1e6544aede327bad32a5732d5bcfff143da73da01d34938efbe917e3289
fd16c60e634e807f6bbb7c3e6e12a4231b7b34851eb98d6da2f178b6125c536f
f5abfba489bfcef9819f0ca20cd54efc779d6091f6462b6083c363636739f41b
SH256 hash:
83d9e44d9a311ea6fdbcbd09fdc816a2067806dcacf24beb5ee786191b1a3ea1
MD5 hash:
b1a7b752b6638ee03cffe5a1dde9213e
SHA1 hash:
52d215a173d2f293990f8c12fc7f4a86330a29cb
Link:
https://www.unpac.me/results/e8b6d9eb-d2c1-4876-86b9-444637537bc7/
SH256 hash:
6435eed8f47713a54aaf21758cd215c6392dc6082c6a9260db2df5915d9a790a
MD5 hash:
1759146e914c8302fdcca321eb8da9dd
SHA1 hash:
4a8aa5cebbb52541a562b0a23fcd71759de1bb4a
Link:
https://www.unpac.me/results/e8b6d9eb-d2c1-4876-86b9-444637537bc7/
SH256 hash:
f444097b2ebf690d6fe0c65b35ae3335a3891bc37eaf34739ebe1c02a1b8c054
MD5 hash:
936bbc2a638f15057e773a3fa40778c9
SHA1 hash:
05ea65e4e6c0787829cd5aa939ea28281c3b0a7b
Link:
https://www.unpac.me/results/e8b6d9eb-d2c1-4876-86b9-444637537bc7/
SH256 hash:
242acd2bd4415b211de8afd058570aac478e1c257d31e908a2823b8fb3788ede
MD5 hash:
7cdabce07469c95df2bfe4bb692757d5
SHA1 hash:
be7905986d224b15517c5b41d4fc30fec309bd8e
Link:
https://www.unpac.me/results/e8b6d9eb-d2c1-4876-86b9-444637537bc7/
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/242acd2bd4415b211de8afd058570aac478e1c257d31e908a2823b8fb3788ede

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:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

OskiStealer

iso 9bafab21d172a1a4c7cc88eb44ca8292a8f96f812d7b4c71b706479f22690b7a

OskiStealer

Executable exe 242acd2bd4415b211de8afd058570aac478e1c257d31e908a2823b8fb3788ede

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 9bafab21d172a1a4c7cc88eb44ca8292a8f96f812d7b4c71b706479f22690b7a
Cape
Cape
https://www.capesandbox.com/analysis/173300/

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