MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 639a212bfefa5d7da9a6a25a583c205e68fbd87d99cf18de3d03575fcd4212a1. 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


UmbralStealer


Vendor detections: 8


Intelligence 8 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 639a212bfefa5d7da9a6a25a583c205e68fbd87d99cf18de3d03575fcd4212a1
SHA3-384 hash: fc6612a801d2b72c3bf65e6f400a671f11d8707a51dbf373ecd5031b622cfb2ea0c1ca3f62123aa0ea62cfc423ada88f
SHA1 hash: 00e4ff56153d226695fb3f10161cd6a49c570e63
MD5 hash: b6bf61f935699a6580e59d238228cd6b
humanhash: sweet-victor-oranges-artist
File name:Umbral.exe
Download: download sample
Signature UmbralStealer
Create hunting rule
File size:221'696 bytes
First seen:2023-05-20 15:31:21 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 3072:JmpcjvqySgPAZ+D9Cocawot18PeXQB4WKnHki0sMXSl8eN7sQ+4XaZcGTSYW:0cWoPA8Rrt18FenHk7y8eNYzpS
Threatray 4 similar samples on MalwareBazaar
TLSH T150245B182BBC8A13E26F8BBD95B102AB4B70F103F819F74E5D4899F82466742F945F53
TrID 60.4% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.8% (.SCR) Windows screen saver (13097/50/3)
8.7% (.EXE) Win64 Executable (generic) (10523/12/4)
5.4% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.1% (.EXE) Win16 NE executable (generic) (5038/12/1)
Reporter JaffaCakes118
Tags:UmbralStealer

Intelligence

File Origin
# of uploads :
1
# of downloads :
107
Origin country :
GB GB
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Umbral.exe
Verdict:
No threats detected
Analysis date:
2023-05-20 15:33:21 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/a793dc54-a619-475c-841a-86936e4af7ec

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.IL.Trojan.MSILZilla.27419.7971.9774.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
DNS request
Sending a custom TCP request
Launching a process
Using the Windows Management Instrumentation requests
Creating a window
Creating a file in the %temp% subdirectories
Creating a file
Sending an HTTP GET request
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
anti-vm anti-vm cmd.exe fingerprint hacktool lolbin packed rat wmic.exe
Link:
https://www.filescan.io/uploads/6468e7f62c9b4b5d2f1c95d9/reports/fb440880-e4b2-40fa-aac7-afbb098d7b68/overview
Verdict:
Malicious
Labled as:
IL:Trojan.MSILZilla
Link:
https://www.hybrid-analysis.com/sample/639a212bfefa5d7da9a6a25a583c205e68fbd87d99cf18de3d03575fcd4212a1
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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/19555947-ddfa-48f7-a8dc-373aa68a7957
Result
Threat name:
Umbral Stealer
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/1238068
Signature
Adds a directory exclusion to Windows Defender
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
May check the online IP address of the machine
Multi AV Scanner detection for submitted file
Tries to harvest and steal browser information (history, passwords, etc)
Yara detected Umbral Stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 871060 Sample: Umbral.exe Startdate: 20/05/2023 Architecture: WINDOWS Score: 80 34 discord.com 2->34 38 Malicious sample detected (through community Yara rule) 2->38 40 Multi AV Scanner detection for submitted file 2->40 42 Yara detected Umbral Stealer 2->42 44 Machine Learning detection for sample 2->44 8 Umbral.exe 15 8 2->8         started        signatures3 process4 dnsIp5 36 ip-api.com 208.95.112.1, 49698, 80 TUT-ASUS United States 8->36 46 May check the online IP address of the machine 8->46 48 Tries to harvest and steal browser information (history, passwords, etc) 8->48 50 Adds a directory exclusion to Windows Defender 8->50 12 powershell.exe 17 8->12         started        14 powershell.exe 12 8->14         started        16 powershell.exe 9 8->16         started        18 5 other processes 8->18 signatures6 process7 process8 20 conhost.exe 12->20         started        22 conhost.exe 14->22         started        24 conhost.exe 16->24         started        26 conhost.exe 18->26         started        28 conhost.exe 18->28         started        30 conhost.exe 18->30         started        32 2 other processes 18->32
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/639a212bfefa5d7da9a6a25a583c205e68fbd87d99cf18de3d03575fcd4212a1/
Threat name:
ByteCode-MSIL.Trojan.Zilla
Create hunting rule
Status:
Malicious
First seen:
2023-05-20 15:32:06 UTC
File Type:
PE (.Net Exe)
AV detection:
17 of 37 (45.95%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=moncck767jox3kngujnfqpbalzupxwd5thhrrxr5anlv7tkcckqq._file
Verdict:
malicious
Similar samples:
6dd21975f4cab86ed7af322c38e9825971e13cc0b826e278f56d2e411ad4f6f8
UmbralStealer
7e9fc9546b1c8892e6ddb754bdea3a38a892c186c8f6969e2780d3edfac6eb46
UmbralStealer
9847293a0884f10d049ad0f0dcd5dd09625e85effe5f00f33ab42c09be313836
UmbralStealer
dc1fac12b351fb002bdb989e60717c36e2bd50c6c96b449fbffeb347c47622a5
UmbralStealer
Result
Malware family:
n/a
Score:
  7/10
Tags:
spyware stealer
Link:
https://tria.ge/reports/230520-syl8vsdb36/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Program crash
Legitimate hosting services abused for malware hosting/C2
Looks up external IP address via web service
Reads user/profile data of web browsers
Unpacked files
SH256 hash:
639a212bfefa5d7da9a6a25a583c205e68fbd87d99cf18de3d03575fcd4212a1
MD5 hash:
b6bf61f935699a6580e59d238228cd6b
SHA1 hash:
00e4ff56153d226695fb3f10161cd6a49c570e63
Link:
https://www.unpac.me/results/5b83d3a9-5ff2-44cd-b541-d555c0e01038/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/639a212bfefa/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.35
Link:
https://yomi.yoroi.company/submissions/639a212bfefa5d7da9a6a25a583c205e68fbd87d99cf18de3d03575fcd4212a1

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:Disable_Defender
Create hunting rule
Author:iam-py-test
Description:Detect files disabling or modifying Windows Defender, Windows Firewall, or Microsoft Smartscreen
Rule name:Discord_APIs
Create hunting rule
Rule name:INDICATOR_SUSPICIOUS_EXE_WMI_EnumerateVideoDevice
Create hunting rule
Author:ditekSHen
Description:Detects executables attemping to enumerate video devices using WMI
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.

Comments