MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c. 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: 10


Intelligence 10 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c
SHA3-384 hash: 1942540f36805b4ad7cf5f5a62494e39ca95b7dd4001fe3db0bdb62778a7903cd136175e0de71dab75a78a512dc3a41f
SHA1 hash: da3f2a6fb40d243ece92534253c79c2669bd4e69
MD5 hash: 6e1476a40e4f1b65294f5ff5df9f99d7
humanhash: mexico-mississippi-lamp-vegan
File name:triage_dropped_file
Download: download sample
Signature Formbook
Create hunting rule
File size:840'704 bytes
First seen:2021-09-20 12:50:23 UTC
Last seen:2021-09-20 14:25:54 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:MBGiY6HGeFuL/LlsOTb7SSYCkdfejQ0hu8s9Tc9wEFqiOxtmtiK5ocFh4x:MA6meFuL/LlTYXRp0Q8s9Tf13+FocFc
TLSH T1A205C0202264C26AE1FBE73CD4229471CB3EF987A036D99E5DC3D9DA0D25341851BF6B
File icon (PE):PE icon
dhash icon a6591878d162e41b (9 x AgentTesla, 7 x Formbook, 2 x SnakeKeylogger)
Reporter malwarelabnet
Tags:exe FormBook xloader

Intelligence

File Origin
# of uploads :
2
# of downloads :
193
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
triage_dropped_file
Verdict:
Malicious activity
Analysis date:
2021-09-20 12:50:54 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/34dcd70c-1cf7-4f30-ab3b-1e7c4a2c3c03

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/189440/
Detection(s):
SecuriteInfo.com.Trojan.Siggen9.48175.30759.23704.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Using the Windows Management Instrumentation requests
Creating a window
Enabling autorun with the shell\open\command registry branches
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/4588c862-7896-40cd-88ac-9bc586f5aaf4
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/854041
Signature
.NET source code contains potential unpacker
Injects a PE file into a foreign processes
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)
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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 AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 486472 Sample: triage_dropped_file Startdate: 20/09/2021 Architecture: WINDOWS Score: 100 33 www.livinwoodbridgefarms.com 2->33 35 www.hrtaro.com 2->35 37 livinwoodbridgefarms.com 2->37 45 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->45 47 Malicious sample detected (through community Yara rule) 2->47 49 Multi AV Scanner detection for submitted file 2->49 51 4 other signatures 2->51 11 triage_dropped_file.exe 3 3 2->11         started        signatures3 process4 file5 31 C:\Users\user\...\triage_dropped_file.exe.log, ASCII 11->31 dropped 65 Tries to detect virtualization through RDTSC time measurements 11->65 67 Injects a PE file into a foreign processes 11->67 15 triage_dropped_file.exe 11->15         started        18 triage_dropped_file.exe 11->18         started        signatures6 process7 signatures8 69 Modifies the context of a thread in another process (thread injection) 15->69 71 Maps a DLL or memory area into another process 15->71 73 Sample uses process hollowing technique 15->73 75 Queues an APC in another process (thread injection) 15->75 20 explorer.exe 15->20 injected process9 dnsIp10 39 consultantadvisors.com 50.87.248.44, 49803, 80 UNIFIEDLAYER-AS-1US United States 20->39 41 diepraxiskommunikation.com 81.169.145.78, 49772, 80 STRATOSTRATOAGDE Germany 20->41 43 15 other IPs or domains 20->43 53 System process connects to network (likely due to code injection or exploit) 20->53 55 Performs DNS queries to domains with low reputation 20->55 24 control.exe 20->24         started        signatures11 process12 signatures13 57 Self deletion via cmd delete 24->57 59 Modifies the context of a thread in another process (thread injection) 24->59 61 Maps a DLL or memory area into another process 24->61 63 Tries to detect virtualization through RDTSC time measurements 24->63 27 cmd.exe 1 24->27         started        process14 process15 29 conhost.exe 27->29         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-09-20 07:18:32 UTC
AV detection:
19 of 28 (67.86%)
Threat level:
  5/5
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:euzn loader rat
Link:
https://tria.ge/reports/210920-p3gx6aebe3/
Behaviour
Gathers network information
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Deletes itself
Xloader Payload
Xloader
Malware Config
C2 Extraction:
http://www.heser.net/euzn/
Unpacked files
SH256 hash:
e86f8321145d76c1d4dea6b6078bd199bc465aa1a1350667a2a622ebd5c09573
MD5 hash:
87fe8cd2bd5e5743c2206ac8eb983678
SHA1 hash:
205e2e983ffc60f77f80687c332d26a7d96b442a
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/3db3c78e-a3a7-4f7d-9763-d72795835a98/
Parent samples :
a0d1e3fbe11fcbbea9dcad1880e23ea531c01c20fbbf383174cd420349657a01
a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c
662ae2a76488e0f775884f0c19daa286c910f2e72acb414a5f820b655ef42565
3dafcb39d7cc251c9a8212a8e745e0d72f2c530bf699a9168a379fa25e36ec38
7b5de7135bd7e3c2eb98a94977c138597d357def8a9851a8df3ee442f83ec737
6446736e3662120e1fe4c3518bc8e6d14553f6b0b27aaf1fc5676e1f73a50c33
17ed64707506c917be6329e1cbe94548d761d218dc8e2d624eab99565acc055d
9508c04b4c1dd578c8c3b8597a68bb73548b107edcbb37f13909a18d85f78b3a
SH256 hash:
cac8b347040a359c02ae5e658d3d76230c7dd7eb33505605ed0b9bc49ff268c7
MD5 hash:
71a894ff252c767b80d65ab1e54fda2b
SHA1 hash:
bcc4ff628585ca28b8b0f2c30e63049b910d4d49
Link:
https://www.unpac.me/results/3db3c78e-a3a7-4f7d-9763-d72795835a98/
SH256 hash:
ea93df0eaa88e983ab442ebdd7c715fc0500163a59ee4c7f6e2328d909d28c51
MD5 hash:
e622cc7c0b481d6fbb4eb09a8e06cef4
SHA1 hash:
a054d65c813f16c5d5993c19bae9707637dec8c0
Link:
https://www.unpac.me/results/3db3c78e-a3a7-4f7d-9763-d72795835a98/
SH256 hash:
afc3dc65bce2d2fab784673a9bd1592793fd779ffc6b554c8ac7a4b2f0ae746f
MD5 hash:
4030441887d964e9f08cf04c661a8eea
SHA1 hash:
3afb70e304901e82324818e3a0700f13e495ec9d
Link:
https://www.unpac.me/results/3db3c78e-a3a7-4f7d-9763-d72795835a98/
SH256 hash:
a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c
MD5 hash:
6e1476a40e4f1b65294f5ff5df9f99d7
SHA1 hash:
da3f2a6fb40d243ece92534253c79c2669bd4e69
Link:
https://www.unpac.me/results/3db3c78e-a3a7-4f7d-9763-d72795835a98/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.65
Link:
https://yomi.yoroi.company/submissions/a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c

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:pe_imphash
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Web download

Formbook

Executable exe a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1634770/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/189440/

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