MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ce07dc9b67f4e91fb0254421599c3344f60732b99c24d39d4f2a5b8e93da56ef. 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



SilentBuilder


Vendor detections: 11


Maldoc score: 5


Intelligence 11 IOCs YARA 10 File information Comments

SHA256 hash: ce07dc9b67f4e91fb0254421599c3344f60732b99c24d39d4f2a5b8e93da56ef
SHA3-384 hash: 741788edba184efe877ca4595a2ee1ce0800584855cb26dd7bd6dc71b0f33041ce77c9400209d533342999495542a61c
SHA1 hash: 823814c91d8c75933f0f49cda5b07ac14e484390
MD5 hash: aeb9b7f6fb7bac0deac61db8295e1d3c
humanhash: venus-fanta-mirror-equal
File name:order_list_fe99087.xls
Download: download sample
Signature SilentBuilder
File size:226'816 bytes
First seen:2021-02-10 07:48:41 UTC
Last seen:2021-02-10 10:15:52 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 6144:5k3hbdlylKsgqopeJBWhZFVE+W2NdAPIHtjQA3MOfSRFvkf3isQaoNVwTpNGc8sp:ANjQONfS3veiQ2eTXxS
TLSH 5E24015BB1A7C982D90607749AB18B22B71FFC152FD64302B309F72C2ABDDD48943957
Reporter abuse_ch
Tags:SilentBuilder xls


Avatar
abuse_ch
Malspam distributing SilentBuilder:

HELO: slot0.sdemendietasa.ga
Sending IP: 45.89.125.212
From: Maia al Mina <maia@oman.gov>
Subject: axh Purchase Order
Attachment: order_list_fe99087.xls

Payload URLs:
http://urgfuid.gq/o/o.exe
http://urgfuid.gq/z/z.exe

Office OLE Information


This malware samples appears to be an Office document. The following table provides more information about this document using oletools and oledump.

OLE id
Maldoc score: 5
Application name is Microsoft Excel
Office document is in OLE format
OLE dump

MalwareBazaar was able to identify 3 sections in this file using oledump:

Section IDSection sizeSection name
1288 bytesDocumentSummaryInformation
2224 bytesSummaryInformation
3222190 bytesWorkbook
OLE vba

MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:

TypeKeywordDescription
AutoExecAuto_OpenRuns when the Excel Workbook is opened
IOCz.exeExecutable file name
SuspiciousEXECMay run an executable file or a system
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence


File Origin
# of uploads :
2
# of downloads :
118
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
order_list_fe99087.xls
Verdict:
Malicious activity
Analysis date:
2021-02-10 07:59:01 UTC
Tags:
macros macros40 trojan rat redline loader

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/vnd.ms-excel
Has a screenshot:
False
Contains macros:
True
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a process with a hidden window
DNS request
Sending an HTTP GET request
Creating a file
Moving a file to the %AppData% directory
Creating a process from a recently created file
Sending an HTTP POST request
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Reading critical registry keys
Creating a file in the %temp% directory
Deleting a recently created file
Setting a keyboard event handler
Stealing user critical data
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Office File
Document image
Document image
Result
Verdict:
MALICIOUS
Details
Excel 4.0 Macro
Document contains Excel 4.0 macros (XLM). A valid, albeit dated feature, this document should be treated with suspicion.
Macro Execution Coercion
Detected a document that appears to social engineer the user into activating embedded logic.
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Result
Threat name:
Hidden Macro 4.0 RedLine
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Signature
Antivirus detection for dropped file
Bypasses PowerShell execution policy
Contains functionality to log keystrokes (.Net Source)
Detected unpacking (overwrites its own PE header)
Document exploit detected (process start blacklist hit)
Drops PE files to the document folder of the user
Found Excel 4.0 Macro with suspicious formulas
Found many strings related to Crypto-Wallets (likely being stolen)
Found obfuscated Excel 4.0 Macro
Installs a global keyboard hook
Machine Learning detection for dropped file
Malicious sample detected (through community Yara rule)
May check the online IP address of the machine
Multi AV Scanner detection for submitted file
Obfuscated command line found
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Powershell drops PE file
Queries sensitive disk information (via WMI, Win32_DiskDrive, often done to detect virtual machines)
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Searches for Windows Mail specific files
Sigma detected: Microsoft Office Product Spawning Windows Shell
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Tries to harvest and steal browser information (history, passwords, etc)
Uses known network protocols on non-standard ports
Yara detected RedLine Stealer
Behaviour
Behavior Graph:
behaviorgraph top1 signatures2 2 Behavior Graph ID: 351010 Sample: order_list_fe99087.xls Startdate: 10/02/2021 Architecture: WINDOWS Score: 100 43 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->43 45 Malicious sample detected (through community Yara rule) 2->45 47 Multi AV Scanner detection for submitted file 2->47 49 12 other signatures 2->49 8 EXCEL.EXE 84 29 2->8         started        process3 signatures4 59 Obfuscated command line found 8->59 61 Document exploit detected (process start blacklist hit) 8->61 11 powershell.exe 7 8->11         started        13 powershell.exe 12 7 8->13         started        18 powershell.exe 7 8->18         started        process5 dnsIp6 20 z.exe 12 24 11->20         started        41 urgfuid.gq 194.156.98.99, 49165, 49172, 80 ADCDATACOM-AS-APADCDATACOMHK Russian Federation 13->41 31 C:\Users\user\Documents\z.exe, PE32 13->31 dropped 69 Drops PE files to the document folder of the user 13->69 71 Powershell drops PE file 13->71 file7 signatures8 process9 dnsIp10 33 urgfuid.gq 20->33 35 api.ip.sb 20->35 37 4 other IPs or domains 20->37 29 C:\Users\user\AppData\Local\Temp\o.exe, PE32 20->29 dropped 51 Detected unpacking (overwrites its own PE header) 20->51 53 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 20->53 55 Queries sensitive disk information (via WMI, Win32_DiskDrive, often done to detect virtual machines) 20->55 57 2 other signatures 20->57 25 o.exe 12 3 20->25         started        file11 signatures12 process13 dnsIp14 39 ipecho.net 216.239.32.21, 49174, 80 GOOGLEUS United States 25->39 63 Antivirus detection for dropped file 25->63 65 Machine Learning detection for dropped file 25->65 67 Installs a global keyboard hook 25->67 signatures15
Threat name:
Document-Word.Downloader.EncDoc
Status:
Malicious
First seen:
2021-02-10 07:32:35 UTC
AV detection:
15 of 29 (51.72%)
Threat level:
  3/5
Result
Malware family:
redline
Score:
  10/10
Tags:
family:redline discovery infostealer macro ransomware spyware xlm
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Checks installed software on the system
Loads dropped DLL
Reads user/profile data of web browsers
Blocklisted process makes network request
Executes dropped EXE
Process spawned unexpected child process
RedLine
RedLine Payload
Malware Config
Dropper Extraction:
http://urgfuid.gq/z/z.exe
Please note that we are no longer able to provide a coverage score for Virus Total.

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:ach_ZLoader_xls_20201029
Author:abuse.ch
Description:Detects ZLoader XLS
Rule name:Email_stealer_bin_mem
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:Excel_Hidden_Macro_Sheet
Rule name:INDICATOR_OLE_Excel4Macros_DL2
Author:ditekSHen
Description:Detects OLE Excel 4 Macros documents acting as downloaders
Rule name:IPPort_combo_mem
Author:James_inthe_box
Description:IP and port combo
Rule name:Select_from_enumeration
Author:James_inthe_box
Description:IP and port combo
Rule name:SharedStrings
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:SUSP_Excel4Macro_AutoOpen
Author:John Lambert @JohnLaTwC
Description:Detects Excel4 macro use with auto open / close
Rule name:UAC_bypass_bin_mem
Author:James_inthe_box
Description:UAC bypass in files like avemaria
Rule name:ZloaderXLSBehavior

File information


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

Malspam

SilentBuilder

Excel file xls ce07dc9b67f4e91fb0254421599c3344f60732b99c24d39d4f2a5b8e93da56ef

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments