MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 98820c48f104e5644529c8e9b012e7c2de6aca35aca322b342ccd23aefdedc96. 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


Formbook


Vendor detections: 7


Intelligence 7 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 98820c48f104e5644529c8e9b012e7c2de6aca35aca322b342ccd23aefdedc96
SHA3-384 hash: 415a455a8c24a16b3b2114887a0e6aa361943479fcd3e63214fa4c352dab72182863b684c1ff1a4dd36e4e927d2a799e
SHA1 hash: c84541b348be3a6d2b0cd585dc576cb4f98317b1
MD5 hash: 59915e5d986c0cb37b96c8e2201a7840
humanhash: colorado-skylark-stream-butter
File name:Tax Invoice.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'070'080 bytes
First seen:2021-03-03 07:48:57 UTC
Last seen:2021-03-03 09:39:05 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'452 x Formbook, 12'201 x SnakeKeylogger)
ssdeep 24576:BDE4wmI+09uCFZgptBd5zWw2XFfNzEWLnKRWu3/bz:Byu46Bd5zWwkF1FLKRtH
TLSH 7B35ADE816A87CD8F1B1DF3079F82592A2F9B573D60DE9493466D2F9701A891CB70338
Reporter abuse_ch
Tags:exe FormBook


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: [139.59.1.152]
Sending IP: 139.59.1.152
From: sangyoung.ka@samsung.com
Subject: Tax Invoice
Attachment: Tax Invoice.z (contains "Tax Invoice.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
132
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
59915e5d986c0cb37b96c8e2201a7840
Verdict:
Suspicious activity
Analysis date:
2021-03-03 06:50:31 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/ea5e9490-f508-4f1d-99c1-66a18dc2236b

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/121282/
Detection(s):
SecuriteInfo.com.Trojan.Win32.Save.a.166.5567.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/625717
Signature
.NET source code contains very large strings
Binary contains a suspicious time stamp
C2 URLs / IPs found in malware configuration
Found malware configuration
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM_3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 361852 Sample: Tax Invoice.exe Startdate: 03/03/2021 Architecture: WINDOWS Score: 100 31 www.hollandhousedesigns.design 2->31 33 hollandhousedesigns.design 2->33 41 Found malware configuration 2->41 43 Malicious sample detected (through community Yara rule) 2->43 45 Multi AV Scanner detection for submitted file 2->45 47 10 other signatures 2->47 11 Tax Invoice.exe 3 2->11         started        signatures3 process4 file5 29 C:\Users\user\AppData\...\Tax Invoice.exe.log, ASCII 11->29 dropped 57 Injects a PE file into a foreign processes 11->57 15 Tax Invoice.exe 11->15         started        signatures6 process7 signatures8 59 Modifies the context of a thread in another process (thread injection) 15->59 61 Maps a DLL or memory area into another process 15->61 63 Sample uses process hollowing technique 15->63 65 Queues an APC in another process (thread injection) 15->65 18 explorer.exe 15->18 injected process9 dnsIp10 35 hollandhousedesigns.design 34.102.136.180, 49744, 49752, 80 GOOGLEUS United States 18->35 37 shops.myshopify.com 23.227.38.74, 49736, 80 CLOUDFLARENETUS Canada 18->37 39 5 other IPs or domains 18->39 49 System process connects to network (likely due to code injection or exploit) 18->49 22 wscript.exe 18->22         started        signatures11 process12 signatures13 51 Modifies the context of a thread in another process (thread injection) 22->51 53 Maps a DLL or memory area into another process 22->53 55 Tries to detect virtualization through RDTSC time measurements 22->55 25 cmd.exe 1 22->25         started        process14 process15 27 conhost.exe 25->27         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/98820c48f104e5644529c8e9b012e7c2de6aca35aca322b342ccd23aefdedc96/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-03-03 07:49:12 UTC
AV detection:
14 of 47 (29.79%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=tcbayshratswirjjzdu3aexhylpgvsrvvsrsfm2cztjdv3663sla._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook rat spyware stealer trojan
Link:
https://tria.ge/reports/210303-4nqax8qpae/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Deletes itself
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.hollandhousedesigns.design/vns/
Unpacked files
SH256 hash:
9fab623a32ce59d9a775e7278435800794184291a9c4a69fe92f3980d089e5b5
MD5 hash:
76df99f9753c8191470c7ae9b4f87661
SHA1 hash:
7f2e69d571ce4652d053f0d05624cf608fb2689a
Link:
https://www.unpac.me/results/f91f5870-0643-4f6c-a9e8-f994c78da51f/
SH256 hash:
98820c48f104e5644529c8e9b012e7c2de6aca35aca322b342ccd23aefdedc96
MD5 hash:
59915e5d986c0cb37b96c8e2201a7840
SHA1 hash:
c84541b348be3a6d2b0cd585dc576cb4f98317b1
Link:
https://www.unpac.me/results/f91f5870-0643-4f6c-a9e8-f994c78da51f/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.35
Link:
https://yomi.yoroi.company/submissions/98820c48f104e5644529c8e9b012e7c2de6aca35aca322b342ccd23aefdedc96

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time

File information

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

Malspam

Formbook

z 5986c97bc725fe0811085090b62e0288fd6cf6b16e25b3f1c91bbc3f9bafd21e

Formbook

Executable exe 98820c48f104e5644529c8e9b012e7c2de6aca35aca322b342ccd23aefdedc96

(this sample)

  
Dropped by
MD5 3400e9da6b74a2147e3844edf739d19b
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/121282/
  
Dropped by
SHA256 5986c97bc725fe0811085090b62e0288fd6cf6b16e25b3f1c91bbc3f9bafd21e

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