MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4a44c42f10efc602ac922a21f3b069c25fed87777135750989b7a6aa6f21f942. 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


Chaos


Vendor detections: 12


Intelligence 12 IOCs YARA 8 File information Comments
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SHA256 hash: 4a44c42f10efc602ac922a21f3b069c25fed87777135750989b7a6aa6f21f942
SHA3-384 hash: d00be679d37a7a7e909044341ad10cdb48eb15596155bda574ac945be68ace8d27d8802d9b47854b61be8894279e7317
SHA1 hash: 93d282e523221476f237589cf504c117ca6335fc
MD5 hash: 5f53595bf1d56ecd376b76514ac8039e
humanhash: thirteen-texas-lion-sink
File name:a.exe
Download: download sample
Signature Chaos
Create hunting rule
File size:27'136 bytes
First seen:2022-05-13 16:15:15 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'658 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 384:FtWZPzzxAm1vM5bqlx7fwgrPiEDNDDmolQ/xEVeLlJq8flfOy5o91/xR0eV82vk:s7zxAmwmrTwLEZ4qgho92w82s
Threatray 1'740 similar samples on MalwareBazaar
TLSH T1FDC2E54877FA5A39F6FF5F7828F260124771B952DD1DE74E0C8D41890C23B8C8DA0AA6
TrID 72.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.4% (.EXE) Win64 Executable (generic) (10523/12/4)
6.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.4% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.EXE) OS/2 Executable (generic) (2029/13)
Reporter James_inthe_box
Tags:Chaos exe

Intelligence

File Origin
# of uploads :
1
# of downloads :
381
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
a.exe
Verdict:
Malicious activity
Analysis date:
2022-05-13 16:10:23 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/0f901eb5-4689-4fe0-9854-1c7eac8c64cd

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Chaos
Create hunting rule
Link:
https://www.capesandbox.com/analysis/270472/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Searching for synchronization primitives
Creating a file
Creating a window
Launching a service
DNS request
Creating a file in the system32 subdirectories
Creating a process from a recently created file
Moving a recently created file
Running batch commands
Creating a process with a hidden window
Launching a process
Creating a file in the Windows subdirectories
Using the Windows Management Instrumentation requests
Changing a file
Creating a file in the %temp% directory
Unauthorized injection to a recently created process
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cmd.exe control.exe hydracrypt obfuscated packed ransomware replace.exe
Link:
https://www.filescan.io/uploads/627e841bce11c3e7ab098afb/reports/49cf691f-5d7c-410d-a67a-0dccd14ef34e/overview
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:
CHAOS Ransomware
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/b4db5c22-19ff-4c0c-a207-91380159dbb8
Result
Threat name:
Chaos
Create hunting rule
Detection:
malicious
Classification:
rans.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/993748
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Changes security center settings (notifications, updates, antivirus, firewall)
Contains functionality to disable the Task Manager (.Net Source)
Creates files inside the volume driver (system volume information)
Deletes shadow drive data (may be related to ransomware)
Deletes the backup plan of Windows
Disables the Windows task manager (taskmgr)
Drops PE files with benign system names
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
May disable shadow drive data (uses vssadmin)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Uses bcdedit to modify the Windows boot settings
Yara detected Chaos Ransomware
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 626240 Sample: a.exe Startdate: 13/05/2022 Architecture: WINDOWS Score: 100 80 Malicious sample detected (through community Yara rule) 2->80 82 Antivirus / Scanner detection for submitted sample 2->82 84 Multi AV Scanner detection for submitted file 2->84 86 4 other signatures 2->86 8 a.exe 5 2->8         started        12 svchost.exe 2->12         started        15 svchost.exe 2->15         started        17 12 other processes 2->17 process3 dnsIp4 70 C:\Users\user\AppData\Roaming\svchost.exe, PE32 8->70 dropped 72 C:\Users\user\AppData\Local\...\a.exe.log, ASCII 8->72 dropped 104 Drops PE files with benign system names 8->104 19 svchost.exe 2 267 8->19         started        76 192.168.2.1 unknown unknown 12->76 106 Deletes shadow drive data (may be related to ransomware) 12->106 108 Uses bcdedit to modify the Windows boot settings 12->108 23 cmd.exe 12->23         started        25 cmd.exe 12->25         started        27 cmd.exe 12->27         started        110 Changes security center settings (notifications, updates, antivirus, firewall) 15->110 29 MpCmdRun.exe 15->29         started        78 127.0.0.1 unknown unknown 17->78 74 C:\Users\user\AppData\...\svchost.exe.log, ASCII 17->74 dropped file5 signatures6 process7 file8 66 C:\...\Chkdsk20200722194816.log.qn8s, data 19->66 dropped 68 C:\...\Chkdsk20200722194816.log, very 19->68 dropped 88 Antivirus detection for dropped file 19->88 90 Multi AV Scanner detection for dropped file 19->90 92 Creates files inside the volume driver (system volume information) 19->92 102 2 other signatures 19->102 31 cmd.exe 1 19->31         started        34 cmd.exe 1 19->34         started        36 cmd.exe 1 19->36         started        94 May disable shadow drive data (uses vssadmin) 23->94 96 Deletes shadow drive data (may be related to ransomware) 23->96 38 conhost.exe 23->38         started        40 vssadmin.exe 23->40         started        42 WMIC.exe 23->42         started        98 Uses bcdedit to modify the Windows boot settings 25->98 46 3 other processes 25->46 100 Deletes the backup plan of Windows 27->100 48 2 other processes 27->48 44 conhost.exe 29->44         started        signatures9 process10 signatures11 112 May disable shadow drive data (uses vssadmin) 31->112 114 Deletes shadow drive data (may be related to ransomware) 31->114 116 Uses bcdedit to modify the Windows boot settings 31->116 50 WMIC.exe 1 31->50         started        52 conhost.exe 31->52         started        54 vssadmin.exe 1 31->54         started        56 bcdedit.exe 8 1 34->56         started        58 bcdedit.exe 7 1 34->58         started        60 conhost.exe 34->60         started        118 Deletes the backup plan of Windows 36->118 62 conhost.exe 36->62         started        64 wbadmin.exe 3 36->64         started        process12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4a44c42f10efc602ac922a21f3b069c25fed87777135750989b7a6aa6f21f942/
Threat name:
ByteCode-MSIL.Ransomware.FileCoder
Create hunting rule
Status:
Malicious
First seen:
2022-05-13 16:14:55 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
22 of 26 (84.62%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=jjcmilyq57daflesfiq7hmdjyjp63b3xoe2xkcmjw6tku3zb7fba._file
Verdict:
malicious
Label(s):
ryuk
Create hunting rule
Similar samples:
076ef4ca884b774579713f120329d8c3b7b973f41ff17a50f221cd3d3bbf1377
Chaos
2e0aa995df9b6a99e37601b1d7dea6fb85f6c7130980a8c2a275370efb6f0236
Chaos
36e08c2df39cd84d8969a95de6a6882fbc954e7ca31a5a5d4be8ec33cfa84649
Chaos
543e39242762d61e740f9c22c173f914cf01dd88c22ad61e65d2c18d9f5162ca
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7ff02d597c1d6d81252edc66749f979c3f61b5e2ebd76ecbbec75859c21baf83
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d9771a04128e50870a96bc7ac8605982205011b723810a04a3411a1ac7eba05d
Chaos
+ 1'730 additional samples on MalwareBazaar
Result
Malware family:
chaos
Create hunting rule
Score:
  10/10
Tags:
family:chaos evasion persistence ransomware spyware stealer
Link:
https://tria.ge/reports/220513-tqsakshbh6/
Behaviour
Checks SCSI registry key(s)
Interacts with shadow copies
Modifies registry class
Opens file in notepad (likely ransom note)
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Adds Run key to start application
Drops desktop.ini file(s)
Checks computer location settings
Drops startup file
Reads user/profile data of web browsers
Deletes backup catalog
Disables Task Manager via registry modification
Executes dropped EXE
Modifies extensions of user files
Deletes shadow copies
Modifies boot configuration data using bcdedit
Chaos
Chaos Ransomware
Unpacked files
SH256 hash:
4a44c42f10efc602ac922a21f3b069c25fed87777135750989b7a6aa6f21f942
MD5 hash:
5f53595bf1d56ecd376b76514ac8039e
SHA1 hash:
93d282e523221476f237589cf504c117ca6335fc
Link:
https://www.unpac.me/results/1d8d7341-6356-484f-8cef-b170fdf9e559/
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/4a44c42f10efc602ac922a21f3b069c25fed87777135750989b7a6aa6f21f942

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:Destructive_Ransomware_Gen1
Create hunting rule
Author:Florian Roth
Description:Detects destructive malware
Reference:http://blog.talosintelligence.com/2018/02/olympic-destroyer.html
Rule name:Destructive_Ransomware_Gen1_RID31CB
Create hunting rule
Author:Florian Roth
Description:Detects destructive malware
Reference:http://blog.talosintelligence.com/2018/02/olympic-destroyer.html
Rule name:INDICATOR_SUSPICIOUS_GENRansomware
Create hunting rule
Author:ditekSHen
Description:detects command variations typically used by ransomware
Rule name:INDICATOR_SUSPICOUS_EXE_References_VEEAM
Create hunting rule
Author:ditekSHen
Description:Detects executables containing many references to VEEAM. Observed in ransomware
Rule name:MALWARE_Win_Chaos
Create hunting rule
Author:ditekSHen
Description:Detects Chaos ransomware
Rule name:pe_imphash
Create hunting rule
Rule name:Redline_Stealer_Monitor
Create hunting rule
Description:Detects RedLine Stealer Variants
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.

  
Delivery method
Other
Cape
Cape
https://www.capesandbox.com/analysis/270472/

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