MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6a1b9e55c38540cb6dc0ec8f678585bc5274d1b07e76826a96f120ed5fed044e. 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: 12


Maldoc score: 7


Intelligence 12 IOCs YARA 4 File information Comments

SHA256 hash: 6a1b9e55c38540cb6dc0ec8f678585bc5274d1b07e76826a96f120ed5fed044e
SHA3-384 hash: 839b265793b5b1dd0d5aed0fbfb103173ee58b641f1ffa7397c047a3864a16f9a3aec5386367993177e30b27c53b5006
SHA1 hash: d150c33c8242416d08f5bb275055db8b4cff2a91
MD5 hash: 0858f38cf3f12518757b215b994a9865
humanhash: lemon-beryllium-oregon-gee
File name:tmphy_2iepy
Download: download sample
Signature SilentBuilder
File size:159'128 bytes
First seen:2022-01-27 18:41:16 UTC
Last seen:2022-02-01 05:57:23 UTC
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 3072:zs+Hyms0k3hbdlylKsgqopeJBWhZFGkE+cMLxAAIb4UgCEqM5mheHRAjNKnlGIz/:o+Hyms0k3hbdlylKsgqopeJBWhZFVE+P
TLSH T1AFF3BFE663A6C984DF15433E8CF2071A3767EC625BE71747A304732A6DB1EA48D0352B
Reporter Cryptolaemus1
Tags:Emotet epoch4 SilentBuilder xlsx

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: 7
OLE dump

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

Section IDSection sizeSection name
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
3147373 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
IOC91.240.118.168IPv4 address
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)
SuspiciousXLM macroXLM macro found. It may contain malicious code

Intelligence


File Origin
# of uploads :
39
# of downloads :
200
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
tmphy_2iepy
Verdict:
Malicious activity
Analysis date:
2022-01-27 20:08:08 UTC
Tags:
macros macros40 emotet-doc emotet trojan

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

Behaviour
DNS request
Sending a custom TCP request
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Searching for the window
Launching a process
Running batch commands by exploiting the app vulnerability
Sending an HTTP GET request to an infection source
Result
Verdict:
Malicious
File Type:
Legacy Excel File
Payload URLs
URL
File name
http://91.240.118.168/zqqw/zaas/fe.html
Macro1
Document image
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cmd cmd.exe macros macros-on-open mshta mshta.exe stripped
Label:
Malicious
Suspicious Score:
7.9/10
Score Malicious:
79%
Score Benign:
21%
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.
IPv4 Dotted Quad URL
A URL was detected referencing a direct IP address, as opposed to a domain name.
Macro Execution Coercion
Detected a document that appears to social engineer the user into activating embedded logic.
MSHTA Pivot
Macro may contain a pivot to an external URL resource via MSHTA.
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Threat name:
Document-Excel.Trojan.Emotet
Status:
Malicious
First seen:
2022-01-27 18:42:15 UTC
File Type:
Document
Extracted files:
8
AV detection:
16 of 28 (57.14%)
Threat level:
  5/5
Result
Malware family:
n/a
Score:
  10/10
Tags:
macro xlm
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Blocklisted process makes network request
Process spawned unexpected child process
Malware Config
Dropper Extraction:
http://91.240.118.168/zqqw/zaas/fe.html
http://91.240.118.168/zqqw/zaas/fe.png
Malware family:
Verdict:
Malicious
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:Excel_Hidden_Macro_Sheet
Rule name:INDICATOR_OLE_Excel4Macros_DL2
Author:ditekSHen
Description:Detects OLE Excel 4 Macros documents acting as downloaders
Rule name:Qbot
Author:Dhanunjaya
Description:Yara Rule to Detect Qbot
Rule name:SUSP_Excel4Macro_AutoOpen
Author:John Lambert @JohnLaTwC
Description:Detects Excel4 macro use with auto open / close

File information


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

Comments