MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ca9e8b79b78e098ae0cd88816c4c0170b574f97688f2f69d72a4c542a965d60f. 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 8 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ca9e8b79b78e098ae0cd88816c4c0170b574f97688f2f69d72a4c542a965d60f
SHA3-384 hash: e8d5d9d5e143dbd69cbb62bb7e7ecf4c9ab56493fbf0b9e5cf8ae4c79f66f8919a972aa600d5262c432d2fc740f0d079
SHA1 hash: ba9070d5bb7b6bb7d6cf09fe4d8a74dba1e60db7
MD5 hash: 6cc7df2d44bf2220b450de714b835f93
humanhash: burger-lake-hotel-fillet
File name:agreement (26).xls
Download: download sample
Signature SilentBuilder
Create hunting rule
File size:40'448 bytes
First seen:2021-02-04 07:29:51 UTC
Last seen:2021-02-04 10:16:10 UTC
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 768:+QcKoSsxz1PDZLDZjlbR868O8KldzH3RP7uDphYHceXVhca+fMHLtyeGxcbB8ORp:+QcKoSsxz1PDZLDZjlbR868O8KlVH3B1
TLSH E60382AAF71DDC19E904473A06E34AAA2B27FC454F630787369CF70A5FB5D804A1361B
Reporter fabjer
Tags:SilentBuilder xls

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
14096 bytesDocumentSummaryInformation
24096 bytesSummaryInformation
330504 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
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 :
116
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
agreement (26).xls
Verdict:
Malicious activity
Analysis date:
2021-02-04 07:32:25 UTC
Tags:
macros
Link:
https://app.any.run/tasks/b9effece-b864-46e2-972d-9832ac0447b1

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
Detection(s):
TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.DLLREGISTERSERVER.200327.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DOCXSTRGOOD.AOEX4.BITSNEEDEDFOR.DLLREGISTERSERVER.200416.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.QakbotTheDuck.20200928.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.Excel4MagicPalmersArcade.20201207.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.Excel4MacroLuresWatchingTheDectives.20210115.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.XLSLOLBINHammerToFall.20201218.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
DNS request
Creating a process with a hidden window
Sending a custom TCP request by exploiting the app vulnerability
Launching a process by exploiting the app vulnerability
Result
Verdict:
Malicious
File Type:
Legacy Office File
Link:
https://app.docguard.net/ca9e8b79b78e098ae0cd88816c4c0170b574f97688f2f69d72a4c542a965d60f/results/dashboard
Payload URLs
URL
File name
https://sujalamcropcare.com/ds/0302.gif
WorkBook
Result
Verdict:
MALICIOUS
Details
Autostarting Excel Macro Sheet
Excel contains Macrosheet logic that will trigger automatically upon document open.
Result
Threat name:
Hidden Macro 4.0
Create hunting rule
Detection:
malicious
Classification:
expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/598827
Signature
Document exploit detected (drops PE files)
Document exploit detected (process start blacklist hit)
Document exploit detected (UrlDownloadToFile)
Found Excel 4.0 Macro with suspicious formulas
Injects code into the Windows Explorer (explorer.exe)
Machine Learning detection for dropped file
Maps a DLL or memory area into another process
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Office process drops PE file
Overwrites code with unconditional jumps - possibly settings hooks in foreign process
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: Schedule REGSVR windows binary
Uses schtasks.exe or at.exe to add and modify task schedules
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 348449 Sample: agreement (26).xls Startdate: 04/02/2021 Architecture: WINDOWS Score: 100 40 Multi AV Scanner detection for dropped file 2->40 42 Sigma detected: Schedule REGSVR windows binary 2->42 44 Multi AV Scanner detection for submitted file 2->44 46 7 other signatures 2->46 9 EXCEL.EXE 89 46 2->9         started        14 taskeng.exe 1 2->14         started        process3 dnsIp4 38 sujalamcropcare.com 116.206.105.72, 443, 49165 PUBLIC-DOMAIN-REGISTRYUS Seychelles 9->38 34 C:\Users\user\AppData\Local\...\0302[1].gif, PE32 9->34 dropped 54 Document exploit detected (process start blacklist hit) 9->54 56 Document exploit detected (UrlDownloadToFile) 9->56 16 rundll32.exe 9->16         started        18 regsvr32.exe 14->18         started        20 regsvr32.exe 14->20         started        file5 signatures6 process7 process8 22 rundll32.exe 16->22         started        25 regsvr32.exe 18->25         started        27 regsvr32.exe 20->27         started        signatures9 48 Overwrites code with unconditional jumps - possibly settings hooks in foreign process 22->48 50 Injects code into the Windows Explorer (explorer.exe) 22->50 52 Maps a DLL or memory area into another process 22->52 29 explorer.exe 8 1 22->29         started        process10 file11 36 C:\dsjyr\vdbud.nki, PE32 29->36 dropped 32 schtasks.exe 29->32         started        process12
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ca9e8b79b78e098ae0cd88816c4c0170b574f97688f2f69d72a4c542a965d60f/
Threat name:
Document-Word.Trojan.TrojamAbracadabra
Create hunting rule
Status:
Malicious
First seen:
2021-02-04 07:30:08 UTC
AV detection:
18 of 29 (62.07%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=zkpiw6nxryeyvygnrcawytaboc2xj6lwrdzpnhlsutcufklf2yhq._file
Result
Malware family:
qakbot
Create hunting rule
Score:
  10/10
Tags:
family:qakbot botnet:tr campaign:1612175155 banker macro stealer trojan xlm
Link:
https://tria.ge/reports/210204-wacbhchn5n/
Behaviour
Checks SCSI registry key(s)
Checks processor information in registry
Creates scheduled task(s)
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Program crash
Loads dropped DLL
Process spawned unexpected child process
Qakbot/Qbot
Malware Config
C2 Extraction:
89.3.198.238:443
172.78.30.215:443
85.52.72.32:2222
76.110.113.71:995
106.51.52.111:443
75.67.192.125:443
172.115.177.204:2222
197.45.110.165:995
82.76.47.211:443
45.77.115.208:443
45.32.211.207:443
144.202.38.185:443
207.246.116.237:995
149.28.101.90:995
149.28.101.90:8443
207.246.116.237:8443
144.202.38.185:2222
45.32.211.207:8443
149.28.101.90:443
149.28.101.90:2222
207.246.116.237:443
207.246.77.75:995
149.28.98.196:2222
149.28.99.97:443
149.28.99.97:995
149.28.99.97:2222
45.63.107.192:2222
45.63.107.192:443
144.202.38.185:995
45.32.211.207:2222
207.246.116.237:2222
207.246.77.75:2222
207.246.77.75:443
45.77.115.208:2222
207.246.77.75:8443
149.28.98.196:995
149.28.98.196:443
45.63.107.192:995
45.32.211.207:995
184.189.122.72:443
80.227.5.69:443
175.141.219.71:443
202.188.138.162:443
77.27.174.49:995
92.59.35.196:2222
81.97.154.100:443
45.77.115.208:995
45.77.115.208:8443
85.58.200.50:2222
86.97.8.63:443
50.240.77.238:22
203.198.96.37:443
24.50.118.93:443
190.85.91.154:443
176.181.247.197:443
41.205.16.1:443
78.63.226.32:443
184.179.14.130:22
193.248.221.184:2222
82.12.157.95:995
172.87.157.235:3389
51.9.198.164:2222
151.242.62.59:32103
70.126.76.75:443
160.3.187.114:443
69.58.147.82:2078
64.121.114.87:443
50.244.112.106:443
76.25.142.196:443
188.25.63.105:443
2.50.2.216:443
80.11.173.82:8443
83.110.103.152:443
140.82.49.12:443
84.72.35.226:443
71.88.193.17:443
74.77.162.33:443
68.186.192.69:443
46.153.119.255:995
213.60.147.140:443
216.201.162.158:443
81.88.254.62:443
196.151.252.84:443
105.186.102.16:443
71.187.170.235:443
68.225.60.77:995
95.77.223.148:443
105.198.236.101:443
81.214.126.173:2222
83.110.108.181:2222
202.184.20.119:443
83.110.12.140:2222
75.136.40.155:443
79.129.121.81:995
37.211.90.175:995
80.11.5.65:2222
85.132.36.111:2222
90.101.117.122:2222
105.96.8.96:443
86.236.77.68:2222
151.33.227.106:443
197.161.154.132:443
115.133.243.6:443
86.98.93.124:2078
156.223.24.221:443
50.29.166.232:995
2.232.253.79:995
2.7.69.217:2222
106.250.150.98:443
47.22.148.6:443
68.131.107.37:443
173.21.10.71:2222
31.5.21.66:995
78.182.229.147:443
69.123.179.70:443
75.118.1.141:443
144.139.47.206:443
45.46.53.140:2222
70.54.25.76:2222
75.136.26.147:443
144.139.166.18:443
67.6.12.4:443
76.111.128.194:443
98.240.24.57:443
216.150.207.100:2222
71.74.12.34:443
71.197.126.250:443
98.121.187.78:443
47.196.192.184:443
74.222.204.82:995
74.68.144.202:443
67.165.206.193:993
71.182.142.63:443
109.12.111.14:443
68.129.194.130:443
31.57.48.136:443
94.53.92.42:443
65.27.228.247:443
71.14.110.199:443
84.247.55.190:8443
67.8.103.21:443
105.198.236.99:443
78.97.207.104:443
27.223.92.142:995
24.152.219.253:995
161.199.180.159:443
77.211.30.202:995
199.19.117.131:443
86.220.60.133:2222
96.37.113.36:993
Dropper Extraction:
https://sujalamcropcare.com/ds/0302.gif
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/ca9e8b79b78e098ae0cd88816c4c0170b574f97688f2f69d72a4c542a965d60f

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:INDICATOR_DOC_PhishingPatterns
Create hunting rule
Author:ditekSHen
Description:Detects OLE, RTF, PDF and OOXML (decompressed) documents with common phishing strings
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:SUSP_EnableContent_String_Gen
Create hunting rule
Author:Florian Roth
Description:Detects suspicious string that asks to enable active content in Office Doc
Reference:Internal Research
Rule name:SUSP_Excel4Macro_AutoOpen
Create hunting rule
Author:John Lambert @JohnLaTwC
Description:Detects Excel4 macro use with auto open / close
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.

Malspam

SilentBuilder

Excel file xls ca9e8b79b78e098ae0cd88816c4c0170b574f97688f2f69d72a4c542a965d60f

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments