MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a907be84fd31c3e486573199a29ebc2624310b18a4872ffe5ab9f45d74af58ec. 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: 31


Intelligence 11 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a907be84fd31c3e486573199a29ebc2624310b18a4872ffe5ab9f45d74af58ec
SHA3-384 hash: a83a11fc7f37aa888cbd46645635d809fd74ecac8fd5cf3609f2be06358048fb02f09e5d9622ce746181ac7e6b2d79c1
SHA1 hash: a6f6704592671ecd3aa231f5253174d350262795
MD5 hash: f2ee53e7d74a14975f8a6b9cd728a156
humanhash: magazine-three-white-charlie
File name:Envio .xls
Download: download sample
Signature QuasarRAT
Create hunting rule
File size:180'736 bytes
First seen:2021-12-14 16:06:00 UTC
Last seen:Never
File type:Excel file xls
MIME type:application/vnd.ms-excel
ssdeep 3072:4RxEtjPOtioVjDGUU1qfDlaGGx+cL2QnAfphqGswK/R3pCMxIJlUKl5tqhrenAjs:OxEtjPOtioVjDGUU1qfDlavx+W2QnAaP
TLSH T11904BF127694C946C95C43F50C92CAEE6E26FD399D9A479F31947F3E3F762A08C0360A
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: 31
OLE dump

MalwareBazaar was able to identify 17 sections in this file using oledump:

Section IDSection sizeSection name
1107 bytesCompObj
2244 bytesDocumentSummaryInformation
3208 bytesSummaryInformation
4143072 bytesWorkbook
5633 bytes_VBA_PROJECT_CUR/PROJECT
6128 bytes_VBA_PROJECT_CUR/PROJECTwm
7833 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
1112672 bytes_VBA_PROJECT_CUR/VBA/ThisWorkbook
127124 bytes_VBA_PROJECT_CUR/VBA/_VBA_PROJECT
132846 bytes_VBA_PROJECT_CUR/VBA/__SRP_0
14318 bytes_VBA_PROJECT_CUR/VBA/__SRP_1
151888 bytes_VBA_PROJECT_CUR/VBA/__SRP_2
16348 bytes_VBA_PROJECT_CUR/VBA/__SRP_3
17612 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
SuspiciousEnvironMay read system environment variables
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
SuspiciousvbNormalFocusMay 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)
SuspiciousXorMay 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) code and P-code are different, this may have been used to hide malicious code

Intelligence

File Origin
# of uploads :
1
# of downloads :
161
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Envio .xls
Verdict:
No threats detected
Analysis date:
2021-12-14 18:01:37 UTC
Tags:
macros macros-on-open
Link:
https://app.any.run/tasks/fa953b46-b1ff-4c9d-9064-4495545d9a77

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/214016/
Detection(s):
TwinWave.EvilDoc.StatusIsLikeAFriend.20210201.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Office.Macro-13.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Office.Macro-11.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
DNS request
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% subdirectories
Sending an HTTP GET request
Unauthorized injection to a recently created process
Sending a custom TCP request by exploiting the app vulnerability
Creating a process from a recently created file
Result
Verdict:
Malicious
File Type:
Legacy Excel File with Macro
Link:
https://app.docguard.net/a907be84fd31c3e486573199a29ebc2624310b18a4872ffe5ab9f45d74af58ec/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/61b8c0f2db84542d41beb536/reports/d9d4b78f-c6aa-4b01-8bae-be595bdf3090/overview
Result
Verdict:
MALICIOUS
Link:
https://labs.inquest.net/dfi/sha256/a907be84fd31c3e486573199a29ebc2624310b18a4872ffe5ab9f45d74af58ec
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/907203
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 dropped file
C2 URLs / IPs found in malware configuration
Connects to many ports of the same IP (likely port scanning)
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 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
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
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Writes to foreign memory regions
Yara detected Quasar RAT
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 539689 Sample: Envio .xls Startdate: 14/12/2021 Architecture: WINDOWS Score: 100 57 Found malware configuration 2->57 59 Malicious sample detected (through community Yara rule) 2->59 61 Antivirus detection for dropped file 2->61 63 18 other signatures 2->63 7 EXCEL.EXE 12 19 2->7         started        12 wimserv.exe 12 1 2->12         started        14 wimserv.exe 2->14         started        process3 dnsIp4 43 tractorandinas.com 192.185.115.3, 443, 49165, 49166 UNIFIEDLAYER-AS-1US United States 7->43 45 www.tractorandinas.com 7->45 33 C:\Users\user\AppData\Roaming\...\BBBDVR.exe, PE32 7->33 dropped 35 C:\Users\user\...\omibbghfhfarpiv[1].exe, PE32 7->35 dropped 73 Document exploit detected (creates forbidden files) 7->73 16 BBBDVR.exe 13 3 7->16         started        47 www.tractorandinas.com 12->47 37 C:\Users\user\AppData\Local\...\wimserv.exe, PE32 12->37 dropped 75 Antivirus detection for dropped file 12->75 77 Machine Learning detection for dropped file 12->77 79 Writes to foreign memory regions 12->79 21 wimserv.exe 12->21         started        49 www.tractorandinas.com 14->49 81 Allocates memory in foreign processes 14->81 83 Injects a PE file into a foreign processes 14->83 23 wimserv.exe 14->23         started        file5 signatures6 process7 dnsIp8 39 www.tractorandinas.com 16->39 41 tractorandinas.com 16->41 29 C:\Users\user\AppData\Roaming\...\wimserv.exe, PE32 16->29 dropped 31 C:\Users\user\AppData\Local\Temp\BBBDVR.exe, PE32 16->31 dropped 65 Antivirus detection for dropped file 16->65 67 Machine Learning detection for dropped file 16->67 69 Writes to foreign memory regions 16->69 71 2 other signatures 16->71 25 BBBDVR.exe 16->25         started        file9 signatures10 process11 dnsIp12 51 artedriendfrim.hopto.org 2.56.56.62, 49168, 49171, 61857 GBTCLOUDUS Netherlands 25->51 53 famesurvelizerditis.sytes.net 25->53 55 2 other IPs or domains 25->55 85 Antivirus detection for dropped file 25->85 87 May check the online IP address of the machine 25->87 89 Machine Learning detection for dropped file 25->89 91 2 other signatures 25->91 signatures13
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a907be84fd31c3e486573199a29ebc2624310b18a4872ffe5ab9f45d74af58ec/
Threat name:
Script-Macro.Trojan.Valyria
Create hunting rule
Status:
Malicious
First seen:
2021-12-14 16:06:12 UTC
File Type:
Document
Extracted files:
29
AV detection:
23 of 45 (51.11%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ved35bh5ghb6jbsxggm2fhv4eysdccyyusds77s2xh2f25fpldwa._file
Result
Malware family:
quasar
Create hunting rule
Score:
  10/10
Tags:
family:quasar macro macro_on_action persistence spyware trojan
Link:
https://tria.ge/reports/211214-tj4p2ahadr/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Modifies Internet Explorer settings
Modifies data under HKEY_USERS
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Enumerates physical storage devices
Suspicious use of SetThreadContext
Adds Run key to start application
Looks up external IP address via web service
Executes dropped EXE
Quasar Payload
Quasar RAT
Malware family:
Quasar
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/a907be84fd31/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/a907be84fd31c3e486573199a29ebc2624310b18a4872ffe5ab9f45d74af58ec

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:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
Rule name:ta505_halo_generated
Create hunting rule
Author:Halogen Generated Rule, Corsin Camichel

File information

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

Malspam

QuasarRAT

Excel file xls a907be84fd31c3e486573199a29ebc2624310b18a4872ffe5ab9f45d74af58ec

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/214016/

Comments