MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 a59fbc4f9903ed18c989e87bc83073b463310ffe6c90a43c53400739719d0aae. 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
| SHA256 hash: | a59fbc4f9903ed18c989e87bc83073b463310ffe6c90a43c53400739719d0aae |
|---|---|
| SHA3-384 hash: | 7b5733012acdfa31343bb38a357ec2a6ef07739973f64a3bf5fef3a0421593194c8871ac156b306f4c50f56594f35cfe |
| SHA1 hash: | 74e5c60af59a50757abc29942c888fa43e854204 |
| MD5 hash: | d32bc982566fbb8d81d3012779d3c320 |
| humanhash: | oranges-vermont-sink-ink |
| File name: | FLP_1037850047.exe |
| Download: | download sample |
| Signature | OskiStealer |
| File size: | 388'920 bytes |
| First seen: | 2021-05-06 14:12:37 UTC |
| Last seen: | 2021-05-06 15:03:44 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'608 x Formbook, 12'242 x SnakeKeylogger) |
| ssdeep | 6144:PwOdf/UYtfUeAIQHuA36cdbYMPsCIZlqV5hkvLRG:PwI/JeeAItC66bnPUZlckTA |
| Threatray | 37 similar samples on MalwareBazaar |
| TLSH | 0084A178FDFF6985C610DE3A666DB05A06E19C18CE8B837BE0D472A47E30DC81A4651F |
| Reporter |  starsSk87264403 |
| Tags: | OskiStealer |
Intelligence
File Origin
# of uploads :
2
# of downloads :
135
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
FLP_1037850047.doc
Verdict:
Malicious activity
Analysis date:
2021-04-26 05:28:58 UTC
Tags:
ole-embedded exploit CVE-2017-11882
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Result
Verdict:
Clean
Maliciousness:
Behaviour
Sending a UDP request
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.
Result
Threat name:
Oski Vidar
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
Creates an undocumented autostart registry key
Found malware configuration
Found many strings related to Crypto-Wallets (likely being stolen)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
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)
Yara detected Costura Assembly Loader
Yara detected Oski Stealer
Yara detected Vidar stealer
Behaviour
Behavior Graph:
Threat name:
ByteCode-MSIL.Trojan.AgenteslaPacker
Status:
Malicious
First seen:
2021-04-26 06:37:20 UTC
AV detection:
23 of 29 (79.31%)
Threat level:
5/5
Verdict:
suspicious
Similar samples:
+ 27 additional samples on MalwareBazaar
Result
Malware family:
oski
Score:
10/10
Tags:
family:oski discovery infostealer spyware stealer
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
Reads user/profile data of web browsers
Oski
Malware Config
C2 Extraction:
duiy.xyz
Unpacked files
SH256 hash:
ebb4c7a8527658d4f02f6242d0a4a518e5881ac4b89ee7036cc8464214a66811
MD5 hash:
9766c14be8e0d0a3e027c63fa097b55b
SHA1 hash:
c96561c8f8aa14db919676b8e84bccb581436db7
SH256 hash:
fc71a6f7e6ae70e2bcf4c5fa6b9b8696596ac30aa3d49a9b01cedcda1364ab81
MD5 hash:
0f6fd567b0f378d9430dec6a82c1e30e
SHA1 hash:
383c12e88eed8148d110dde5dc189b1e571136da
SH256 hash:
a4b8f0881830c136366acebfce7779fb7c1328b42b4f0845428d9dd4efa320dd
MD5 hash:
08ad7f0fcf363b98a72a781f94cd03d8
SHA1 hash:
316fec387dbc897200c3448cee6955fe9283acc2
Detections:
win_oski_g0
win_oski_auto
SH256 hash:
a59fbc4f9903ed18c989e87bc83073b463310ffe6c90a43c53400739719d0aae
MD5 hash:
d32bc982566fbb8d81d3012779d3c320
SHA1 hash:
74e5c60af59a50757abc29942c888fa43e854204
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
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 |
|---|---|
| Author: | Aaron DeVera |
| Description: | Discord domains |
| Rule name: | INDICATOR_KB_CERT_04f131322cc31d92c849fca351d2f141 |
|---|---|
| Author: | ditekSHen |
| Description: | Detects executables signed with stolen, revoked or invalid certificates |
| Rule name: | INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu |
|---|---|
| Author: | ditekSHen |
| Description: | Detect executables with stomped PE compilation timestamp that is greater than local current time |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Web download
Delivery method
Distributed via web download
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