🤲🏼 NEW | abuse.ch Community Hub! Earn recognition 🏅 for the malware intelligence you share, climb the leaderboards 📈, and connect with like-minded contributors who share your hunting focus 🤝. Ready to unlock your profile? Go to the Community Hub →

MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c5a7c8cd2cb80268ee70e781bf2e1688b03ad75b8b13df18e64434960bc3a5ac. 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


ZLoader


Vendor detections: 6


Maldoc score: 5


Intelligence 6 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c5a7c8cd2cb80268ee70e781bf2e1688b03ad75b8b13df18e64434960bc3a5ac
SHA3-384 hash: 600cb2ec98921b6e5fa8298eba02db2f22616a9f0f311118d6ceb37b11c72bedcb65566ece90395d4a3f88c1ff2b1240
SHA1 hash: a2e1b9f9cc3bde43b1e7d08880cde381ff34c23d
MD5 hash: 378df42df361ab47525171fa2264721f
humanhash: network-winter-happy-september
File name:SecuriteInfo.com.Heur.31942.25563
Download: download sample
Signature ZLoader
Create hunting rule
File size:46'080 bytes
First seen:2020-10-31 02:52:15 UTC
Last seen:Never
File type:Excel file xlsx
MIME type:application/vnd.ms-excel
ssdeep 768:d1Qk3hOdsylKlgxopeiBNhZFGzE+cL2kdAJT+KiHeL8WTkrAaUF/L/COkwwlK5/A:Yk3hOdsylKlgxopeiBNhZFGzE+cL2kdn
TLSH 052374F3AF96DD75CA1883794C6747A0A313EC5167AB83873281F6393FB1BB05906186
Reporter SecuriteInfoCom
Tags:ZLoader

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 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
SuspiciousHex StringsHex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)
SuspiciousBase64 StringsBase64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all)

Intelligence

File Origin
# of uploads :
1
# of downloads :
160
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Heur.31942.25563.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.ZloaderUnicodeRoadToNoWhere.20200720.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.ZloaderUnicodeRoadToNoWherePartDuex.20200730.UNOFFICIAL
Create hunting rule

TwinwWave.EvilDoc.ZloaderBackToBasom.20201026.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Creating a file
Creating a process with a hidden window
Deleting a recently created file
Replacing files
Launching a process
Possible injection to a system process
Launching a process by exploiting the app vulnerability
Creating a process from a recently created file
Result
Threat name:
Hidden Macro 4.0
Create hunting rule
Detection:
malicious
Classification:
spre.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/517413
Signature
Document exploit detected (creates forbidden files)
Document exploit detected (process start blacklist hit)
Found Excel 4.0 Macro with suspicious formulas
Injects code into the Windows Explorer (explorer.exe)
Microsoft Office drops suspicious files
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Potential malicious VBS script found (has network functionality)
Potential malicious VBS script found (suspicious strings)
System process connects to network (likely due to code injection or exploit)
Yara detected VBS Launcher Generic
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 307815 Sample: SecuriteInfo.com.Heur.31942.25563 Startdate: 31/10/2020 Architecture: WINDOWS Score: 100 39 Multi AV Scanner detection for submitted file 2->39 41 Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros) 2->41 43 Yara detected VBS Launcher Generic 2->43 45 3 other signatures 2->45 6 EXCEL.EXE 60 27 2->6         started        10 explorer.exe 2->10         started        12 explorer.exe 2 2->12         started        14 explorer.exe 2->14         started        process3 file4 31 C:\Users\Public\zh0EhJL.vbs, ASCII 6->31 dropped 33 C:\Users\Public\D90T.vbs, ASCII 6->33 dropped 47 Document exploit detected (creates forbidden files) 6->47 49 Injects code into the Windows Explorer (explorer.exe) 6->49 51 Document exploit detected (process start blacklist hit) 6->51 53 Microsoft Office drops suspicious files 6->53 16 explorer.exe 1 6->16         started        18 explorer.exe 1 6->18         started        20 explorer.exe 1 6->20         started        22 wscript.exe 4 1 10->22         started        27 wscript.exe 1 12->27         started        29 wscript.exe 14->29         started        signatures5 process6 dnsIp7 37 longisland.casa 104.27.135.179, 443, 49167 CLOUDFLARENETUS United States 22->37 35 C:\Users\Public\RPW.html, HTML 22->35 dropped 55 System process connects to network (likely due to code injection or exploit) 22->55 file8 signatures9
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c5a7c8cd2cb80268ee70e781bf2e1688b03ad75b8b13df18e64434960bc3a5ac/
Threat name:
Document-Excel.Trojan.ZLoader
Create hunting rule
Status:
Malicious
First seen:
2020-10-30 17:45:28 UTC
AV detection:
17 of 29 (58.62%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ywt4rtjmxabgr3tq46a36lqwrcydvv23rmj56ghgiq2jmc6duwwa._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
n/a
Link:
https://tria.ge/reports/201031-pj93crhrv6/
Behaviour
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Checks processor information in registry
Suspicious use of FindShellTrayWindow
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Trojan
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/c5a7c8cd2cb80268ee70e781bf2e1688b03ad75b8b13df18e64434960bc3a5ac

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:Email_stealer_bin_mem
Create hunting rule
Author:James_inthe_box
Description:Email in files like avemaria
Rule name:IPPort_combo_mem
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:Select_from_enumeration
Create hunting rule
Author:James_inthe_box
Description:IP and port combo
Rule name:SharedStrings
Create hunting rule
Author:Katie Kleemola
Description:Internal names found in LURK0/CCTV0 samples
Rule name:UAC_bypass_bin_mem
Create hunting rule
Author:James_inthe_box
Description:UAC bypass in files like avemaria

File information

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

Comments