MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a1f309adfabcda9c7f1badc025f7756f7dd8ff9da3529dee09044df6e7d177df. 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


QuasarRAT


Vendor detections: 11


Maldoc score: 25


Intelligence 11 IOCs YARA File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a1f309adfabcda9c7f1badc025f7756f7dd8ff9da3529dee09044df6e7d177df
SHA3-384 hash: cf68e4af5f421345cf36202346d84af9c7c1d4dfa75a36f49acedc3f08e6b056cb313db2a497d0530b84ee11b282267b
SHA1 hash: 4a7f399ac4e8420b73a8274003eac6a1ffc31fb0
MD5 hash: 271ba3d36cd7425438355af48c600e20
humanhash: winner-september-finch-cola
File name:Comprobante de pago.xls
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:111'616 bytes
First seen:2021-10-23 05:27:04 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 3072:nrxEtjPOtioVjDGUU1qfDlaGGx+cL2QnAT1DvjwPNohB7V3VrPFNO7X2z0JLjbax:rxEtjPOtioVjDGUU1qfDlavx+W2QnATx
TLSH T1CEB38D657650C812D688077B1CF2C6DA7B23BC52AEBA83073594F73E5FB62E0D902617
Reporter abuse_ch
Tags:QuasarRAT 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: 25
OLE dump

MalwareBazaar was able to identify 19 sections in this file using oledump:

Section IDSection sizeSection name
1107 bytesCompObj
2244 bytesDocumentSummaryInformation
3208 bytesSummaryInformation
476238 bytesWorkbook
5572 bytes_VBA_PROJECT_CUR/PROJECT
6128 bytes_VBA_PROJECT_CUR/PROJECTwm
7960 bytes_VBA_PROJECT_CUR/VBA/Module1
8985 bytes_VBA_PROJECT_CUR/VBA/Sheet1
9985 bytes_VBA_PROJECT_CUR/VBA/Sheet2
10985 bytes_VBA_PROJECT_CUR/VBA/Sheet3
1110393 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
126851 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
132720 bytes_VBA_PROJECT_CUR/VBA/__SRP_0
14319 bytes_VBA_PROJECT_CUR/VBA/__SRP_1
152112 bytes_VBA_PROJECT_CUR/VBA/__SRP_2
16158 bytes_VBA_PROJECT_CUR/VBA/__SRP_3
1784 bytes_VBA_PROJECT_CUR/VBA/__SRP_4
18104 bytes_VBA_PROJECT_CUR/VBA/__SRP_5
19613 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:

TypeKeywordDescription
AutoExecWorkbook_OpenRuns when the Excel Workbook is opened
SuspiciousOpenMay open a file
SuspiciousWriteMay write to a file (if combined with Open)
Suspiciousadodb.streamMay create a text file
SuspiciousSaveToFileMay create a text file
SuspiciousShellMay run an executable file or a system command
SuspiciousWScript.ShellMay run an executable file or a system command
SuspiciousCreateObjectMay create an OLE object
SuspiciousShell.ApplicationMay run an application (if combined with CreateObject)
Suspiciousmicrosoft.xmlhttpMay download files from the Internet
SuspiciousChrMay attempt to obfuscate specific strings (use option --deobf to deobfuscate)
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 :
539
Origin country :
n/a
Vendor Threat Intelligence
Detection:
QuasarRAT
Create hunting rule
Link:
https://www.capesandbox.com/analysis/199545/
Detection(s):
Xls.Macro.Obfuscation-9804250-0
Create hunting rule

MiscreantPunch.EvilMacro.DL.170224.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.CROAndTheTangerineDream.M1.20200630.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.CROAndTheTangerineDream.M2.20200630.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.StatusIsLikeAFriend.20210201.UNOFFICIAL
Create hunting rule

TwinWave.EvilDoc.DidntIBlowYourMindThisTime.20210922.UNOFFICIAL
Create hunting rule

Sanesecurity.Badmacro.Doc.wsc.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/a1f309adfabcda9c7f1badc025f7756f7dd8ff9da3529dee09044df6e7d177df/results/dashboard
Document image
Image:
Download PNG
Document image
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
evasive macros macros-on-open vbastomped
Link:
https://www.filescan.io/uploads/61739d64db358dd15ed88863/reports/99271575-ec30-42dd-a78b-4c7da2bd3a49/overview
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/a1f309adfabcda9c7f1badc025f7756f7dd8ff9da3529dee09044df6e7d177df
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:
Quasar
Create hunting rule
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/875574
Signature
.NET source code contains potential unpacker
.NET source code references suspicious native API functions
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Connects to many ports of the same IP (likely port scanning)
Creates an undocumented autostart registry key
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 exploit detected (creates forbidden files)
Document exploit detected (drops PE files)
Document exploit detected (process start blacklist hit)
Found malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
May check the online IP address of the machine
Office process drops PE file
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Sigma detected: MS Office Product Spawning Exe in User Dir
Writes to foreign memory regions
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 508006 Sample: Comprobante de pago.xls Startdate: 23/10/2021 Architecture: WINDOWS Score: 100 37 Found malware configuration 2->37 39 Malicious sample detected (through community Yara rule) 2->39 41 Antivirus detection for URL or domain 2->41 43 15 other signatures 2->43 7 EXCEL.EXE 57 24 2->7         started        process3 dnsIp4 33 www.sriva.com.mx 3.227.195.104, 443, 49167 AMAZON-AESUS United States 7->33 21 C:\Users\user\AppData\...\ONEYIEYG.exe, PE32 7->21 dropped 23 C:\Users\user\AppData\...\gnfxngjm[1].exe, PE32 7->23 dropped 53 Document exploit detected (creates forbidden files) 7->53 12 ONEYIEYG.exe 12 3 7->12         started        file5 signatures6 process7 dnsIp8 35 45.133.1.84, 49168, 80 DEDIPATH-LLCUS Netherlands 12->35 25 C:\Users\user\AppData\Roaming\...\iccsr.exe, PE32 12->25 dropped 27 C:\Users\user\AppData\Local\...\ONEYIEYG.exe, PE32 12->27 dropped 55 Creates an undocumented autostart registry key 12->55 57 Machine Learning detection for dropped file 12->57 59 Writes to foreign memory regions 12->59 61 2 other signatures 12->61 17 ONEYIEYG.exe 12->17         started        file9 signatures10 process11 dnsIp12 29 ildriendfrirotoi.zapto.org 194.5.98.74, 49170, 61790 DANILENKODE Netherlands 17->29 31 ip-api.com 208.95.112.1, 49169, 80 TUT-ASUS United States 17->31 45 May check the online IP address of the machine 17->45 47 Machine Learning detection for dropped file 17->47 49 Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines) 17->49 51 Hides that the sample has been downloaded from the Internet (zone.identifier) 17->51 signatures13
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a1f309adfabcda9c7f1badc025f7756f7dd8ff9da3529dee09044df6e7d177df/
Threat name:
Script-Macro.Trojan.Valyria
Create hunting rule
Status:
Malicious
First seen:
2021-10-23 05:28:04 UTC
AV detection:
22 of 44 (50.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=uhzqtlp2xtnjy7y3vxacl53vn565r745unjj33qjarg7nz6ro7pq._file
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar botnet:criok macro macro_on_action spyware trojan
Link:
https://tria.ge/reports/211023-f51cvadagl/
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
Office loads VBA resources, possible macro or embedded object present
Suspicious use of SetThreadContext
Looks up external IP address via web service
Loads dropped DLL
Downloads MZ/PE file
Executes dropped EXE
Quasar Payload
Quasar RAT
Malware Config
C2 Extraction:
ildriendfrirotoi.zapto.org:61790
fruitingsuccess.ignorelist.com:61789
Malware family:
Quasar
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/a1f309adfabc/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
iSpy Keylogger
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/a1f309adfabcda9c7f1badc025f7756f7dd8ff9da3529dee09044df6e7d177df

File information

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

Malspam

QuasarRAT

Excel file xls a1f309adfabcda9c7f1badc025f7756f7dd8ff9da3529dee09044df6e7d177df

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/199545/

Comments