MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 75f423b4e6ca17c94dda8104d745642ca61a0a54a38bf29e3ca55b9d0fec7d66. 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
GuLoader
Vendor detections: 9
Maldoc score: 31
| SHA256 hash: | 75f423b4e6ca17c94dda8104d745642ca61a0a54a38bf29e3ca55b9d0fec7d66 |
|---|---|
| SHA3-384 hash: | af6391266567e2665a14ae9d1d6026b9b2e4c2d7e764bc9989d89855fa687a0ef10a28100aaef5f8ffc3bbbd03004ca0 |
| SHA1 hash: | e2c705f99df3ec3a2afb4946f7dcb7b7be459a83 |
| MD5 hash: | e0f53bee25d377088bd3ec927c86b10f |
| humanhash: | two-six-oranges-oregon |
| File name: | Pago.xls |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 146'432 bytes |
| First seen: | 2021-07-28 15:59:48 UTC |
| Last seen: | 2021-07-28 16:50:00 UTC |
| File type: |  xls |
| MIME type: | application/vnd.ms-excel |
| ssdeep | 3072:hFxEtjPOtioVjDGUU1qfDlaGGx+cL2QnA/RFsfHepKxiFv99vnhOeJyHKOG7bpAs:3xEtjPOtioVjDGUU1qfDlavx+W2QnAbF |
| TLSH | T10DE39EA27690F916D94563310CEFD7F62736BC015EA78347338AB72E6E332D0894365A |
| Reporter |  abuse_ch |
| Tags: | GuLoader 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: 31 |
| Application name is Microsoft Excel |
| Office document is in OLE format |
| Office document contains VBA Macros |
OLE dump
MalwareBazaar was able to identify 17 sections in this file using oledump:
| Section ID | Section size | Section name |
|---|---|---|
| 1 | 107 bytes | CompObj |
| 2 | 244 bytes | DocumentSummaryInformation |
| 3 | 208 bytes | SummaryInformation |
| 4 | 102645 bytes | Workbook |
| 5 | 578 bytes | _VBA_PROJECT_CUR/PROJECT |
| 6 | 128 bytes | _VBA_PROJECT_CUR/PROJECTwm |
| 7 | 824 bytes | _VBA_PROJECT_CUR/VBA/Module1 |
| 8 | 985 bytes | _VBA_PROJECT_CUR/VBA/Sheet1 |
| 9 | 985 bytes | _VBA_PROJECT_CUR/VBA/Sheet2 |
| 10 | 985 bytes | _VBA_PROJECT_CUR/VBA/Sheet3 |
| 11 | 15812 bytes | _VBA_PROJECT_CUR/VBA/ThisWorkbook |
| 12 | 9866 bytes | _VBA_PROJECT_CUR/VBA/_VBA_PROJECT |
| 13 | 2518 bytes | _VBA_PROJECT_CUR/VBA/__SRP_0 |
| 14 | 310 bytes | _VBA_PROJECT_CUR/VBA/__SRP_1 |
| 15 | 988 bytes | _VBA_PROJECT_CUR/VBA/__SRP_2 |
| 16 | 1470 bytes | _VBA_PROJECT_CUR/VBA/__SRP_3 |
| 17 | 614 bytes | _VBA_PROJECT_CUR/VBA/dir |
OLE vba
MalwareBazaar was able to extract and deobfuscate VBA script(s) the following information from OLE objects embedded in this file using olevba:
| Type | Keyword | Description |
|---|---|---|
| AutoExec | Workbook_Open | Runs when the Excel Workbook is opened |
| Suspicious | Environ | May read system environment variables |
| Suspicious | open | May open a file |
| Suspicious | Write | May write to a file (if combined with Open) |
| Suspicious | adodb.stream | May create a text file |
| Suspicious | SaveToFile | May create a text file |
| Suspicious | Shell | May run an executable file or a system command |
| Suspicious | vbNormalFocus | May run an executable file or a system command |
| Suspicious | WScript.Shell | May run an executable file or a system command |
| Suspicious | CreateObject | May create an OLE object |
| Suspicious | Shell.Application | May run an application (if combined with CreateObject) |
| Suspicious | microsoft.xmlhttp | May download files from the Internet |
| Suspicious | Chr | May attempt to obfuscate specific strings (use option --deobf to deobfuscate) |
| Suspicious | Xor | May attempt to obfuscate specific strings (use option --deobf to deobfuscate) |
| Suspicious | Hex Strings | Hex-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) |
| Suspicious | Base64 Strings | Base64-encoded strings were detected, may be used to obfuscate strings (option --decode to see all) code and P-code are different, this may have been used to hide malicious code |
Intelligence
File Origin
# of uploads :
2
# of downloads :
247
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Pago.xls
Verdict:
No threats detected
Analysis date:
2021-07-28 16:04:20 UTC
Tags:
macros macros-on-open
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:
n/a
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Document image
Image:
Result
Verdict:
MALICIOUS
Link:
Details
Macro with Startup Hook
Detected macro logic that will automatically execute on document open. Most malware contains some execution hook.
Macro with File System Write
Detected macro logic that can write data to the file system.
Shell.Application Object
Detected the instantiation of Shell Application object within the macro.
Macro Contains Suspicious String
Detected a macro with a suspicious string. Suspicious strings include privileged function calls, obfuscations, odd registry keys, etc...
Document With Minimal Content
Document contains less than 1 kilobyte of semantic information.
Result
Threat name:
GuLoader
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
Antivirus / Scanner detection for submitted sample
C2 URLs / IPs found in malware configuration
Contains functionality to detect hardware virtualization (CPUID execution measurement)
Document contains an embedded VBA macro with suspicious strings
Document contains an embedded VBA with functions possibly related to ADO stream file operations
Document contains an embedded VBA with functions possibly related to HTTP operations
Document contains an embedded VBA with functions possibly related to WSH operations (process, registry, environment, or keystrokes)
Document contains an embedded VBA with hexadecimal encoded strings
Document contains VBA stomped code (only p-code) potentially bypassing AV detection
Document exploit detected (creates forbidden files)
Document exploit detected (drops PE files)
Document exploit detected (process start blacklist hit)
Found malware configuration
Machine Learning detection for dropped file
Machine Learning detection for sample
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office process drops PE file
Sigma detected: MS Office Product Spawning Exe in User Dir
Tries to detect virtualization through RDTSC time measurements
Yara detected GuLoader
Behaviour
Behavior Graph:
Gathering data
Threat name:
Script-Macro.Trojan.Wacatac
Status:
Malicious
First seen:
2021-07-28 16:00:10 UTC
AV detection:
21 of 46 (45.65%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
guloader
Score:
10/10
Tags:
family:guloader downloader macro macro_on_action
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Suspicious behavior: AddClipboardFormatListener
Suspicious use of FindShellTrayWindow
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Loads dropped DLL
Downloads MZ/PE file
Executes dropped EXE
Guloader,Cloudeye
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
Delivery method
Distributed via e-mail attachment
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