MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b2f4176efc7fb22a1958f63af6f3029b8d4fdbecb98625828822d471a6a137b4. 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: 11


Intelligence 11 IOCs YARA 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b2f4176efc7fb22a1958f63af6f3029b8d4fdbecb98625828822d471a6a137b4
SHA3-384 hash: 36725d2997ea3b56c3772a992ec3f31b4f8e003df97ceacea90f6c7cafc51d73e8062d084d62be1caf3f685224334936
SHA1 hash: a8841adc11f8846a494bc54940f4edb9d4cbecc0
MD5 hash: a27577cef313450cf362d2dae973c543
humanhash: ceiling-bakerloo-july-minnesota
File name:rtgs_pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:314'880 bytes
First seen:2020-12-17 08:36:24 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'747 x AgentTesla, 19'638 x Formbook, 12'244 x SnakeKeylogger)
ssdeep 6144:MaN4ve9njqYpGhsc9pZtir0TJGiuAxYi9FkdwbI:Mc4venuwGn/oAZuAKcmdy
Threatray 3'293 similar samples on MalwareBazaar
TLSH 3C641241E78C6777D5DF1977A8E3E342D6E2E2671482E74FB9C202140A43FEE929190B
Reporter abuse_ch
Tags:exe FormBook


Avatar
abuse_ch
Malspam distributing Formbook:

HELO: bear.chiroro.net
Sending IP: 211.125.117.93
From: RAJEEV RASTOGI<rajeevmech@lntecc.com>
Reply-To: <rajeevmech@lntecc.com>
Subject: RTGS payment
Attachment: rtgs.rar (contains "rtgs_pdf.exe")

Intelligence

File Origin
# of uploads :
1
# of downloads :
119
Origin country :
n/a
Vendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching the default Windows debugger (dwwin.exe)
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Result
Verdict:
MALICIOUS
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/565263
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Hides that the sample has been downloaded from the Internet (zone.identifier)
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)
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
Uses ipconfig to lookup or modify the Windows network settings
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 331719 Sample: rtgs_pdf.exe Startdate: 17/12/2020 Architecture: WINDOWS Score: 100 36 www.dsr.cool 2->36 38 www.charlessbridge.com 2->38 40 2 other IPs or domains 2->40 48 Malicious sample detected (through community Yara rule) 2->48 50 Antivirus / Scanner detection for submitted sample 2->50 52 Multi AV Scanner detection for submitted file 2->52 54 6 other signatures 2->54 11 rtgs_pdf.exe 5 2->11         started        signatures3 process4 file5 34 C:\Users\user\AppData\...\rtgs_pdf.exe.log, ASCII 11->34 dropped 64 Tries to detect virtualization through RDTSC time measurements 11->64 66 Hides that the sample has been downloaded from the Internet (zone.identifier) 11->66 68 Injects a PE file into a foreign processes 11->68 15 rtgs_pdf.exe 11->15         started        18 WerFault.exe 20 9 11->18         started        signatures6 process7 file8 70 Modifies the context of a thread in another process (thread injection) 15->70 72 Maps a DLL or memory area into another process 15->72 74 Sample uses process hollowing technique 15->74 76 Queues an APC in another process (thread injection) 15->76 21 explorer.exe 15->21 injected 32 C:\ProgramData\Microsoft\...\Report.wer, Little-endian 18->32 dropped signatures9 process10 dnsIp11 42 www.alodolu.com 156.241.53.23, 49761, 80 XIAOZHIYUN1-AS-APICIDCNETWORKUS Seychelles 21->42 44 popuplomi.com 50.97.186.164, 49762, 80 SOFTLAYERUS United States 21->44 46 14 other IPs or domains 21->46 56 System process connects to network (likely due to code injection or exploit) 21->56 25 ipconfig.exe 21->25         started        signatures12 process13 signatures14 58 Modifies the context of a thread in another process (thread injection) 25->58 60 Maps a DLL or memory area into another process 25->60 62 Tries to detect virtualization through RDTSC time measurements 25->62 28 cmd.exe 1 25->28         started        process15 process16 30 conhost.exe 28->30         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b2f4176efc7fb22a1958f63af6f3029b8d4fdbecb98625828822d471a6a137b4/
Threat name:
ByteCode-MSIL.Backdoor.Crysan
Create hunting rule
Status:
Malicious
First seen:
2020-12-17 06:44:56 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=wl2bo3x4p6zcugky6y5pn4yctogu7w7mxgdclauielkhdjvbg62a._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
0110a52c51d060db8c4b9f3d654340fdf954bd7ceb47956e235ebe5921a57df4
Formbook
29c9884d02cba2c6ab0a72af878c9f1c2768d96b912f5847608fc040f5f98083
Formbook
319795a056019b583b556b445052ec4c33446a75b7310af85bf15be00b2cf94e
Formbook
3571d3ca49f3c593d4b34f2d7bd9aa8ab2b0bfb99111a2a2561a0d25d494fa2f
Formbook
38a0bf5c98a42c67d5612b0b377c51725caedc64b19f9c4d20f0ebc6fe972c0d
Formbook
63cdf6732c057eee9626cae35b73e53dbc35b1c7231c573e8c672372074ac926
Formbook
7cea909eb4fef13fdeee846b808200826a8de0292ba555bcc4fefdde642dbb55
Formbook
84cb3c9404d520f05f868b550697de2803c587b02fc156764c953a12a227e4d7
Formbook
8daa411eb30ad00d9be98b72d66343cd681616040c1b825a4b35bfc2a27ee1de
Formbook
bc1a39fab39f372baddb7b2b12553e4c687a099d605892704daefdae5ed4995f
Formbook
+ 3'283 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:formbook family:xloader loader rat spyware stealer trojan
Link:
https://tria.ge/reports/201217-3q2js1a5f2/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Program crash
Drops file in Windows directory
Suspicious use of SetThreadContext
Drops desktop.ini file(s)
Deletes itself
Xloader Payload
Formbook
Xloader
Malware Config
C2 Extraction:
http://www.fhmaluxury.com/rerx/
Unpacked files
SH256 hash:
b2f4176efc7fb22a1958f63af6f3029b8d4fdbecb98625828822d471a6a137b4
MD5 hash:
a27577cef313450cf362d2dae973c543
SHA1 hash:
a8841adc11f8846a494bc54940f4edb9d4cbecc0
Link:
https://www.unpac.me/results/b5c4fac2-da38-4b13-b47c-e38288e72993/
SH256 hash:
466afd21f607dd6354d7b5df76630e666ebdac8307fd73c746dc6e595b7849c6
MD5 hash:
edec024941db641ffe8ae3e29418dbf0
SHA1 hash:
120f4c2609408b0f5fced8e69911b96aaedf4a8d
Link:
https://www.unpac.me/results/b5c4fac2-da38-4b13-b47c-e38288e72993/
SH256 hash:
32df75ef3a1a17762569f99e7b4009454a5c5c4f3c2da13491120f468c7fd7a8
MD5 hash:
8ac230606e0a385736481baf1afecf09
SHA1 hash:
661e9b28ab525a680df93d976c3fdb1cdc0f192c
Link:
https://www.unpac.me/results/b5c4fac2-da38-4b13-b47c-e38288e72993/
SH256 hash:
d3e099f04a35445338e403bf8bf4cd2ff17fd30eabd355cb7d9e03762c198e9b
MD5 hash:
0e3da18d77255074e40d41b764b06cb1
SHA1 hash:
aab3a6665f09003f9fa4c6c8bb4bf3967ed8bf34
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/b5c4fac2-da38-4b13-b47c-e38288e72993/
Parent samples :
b2f4176efc7fb22a1958f63af6f3029b8d4fdbecb98625828822d471a6a137b4
c79c943ee3380a0bbce2f3665c40ae1e46b0ca42effde611924b3d51d7b625be
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Remcos
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b2f4176efc7fb22a1958f63af6f3029b8d4fdbecb98625828822d471a6a137b4

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:crime_win32_ransom_avaddon_1
Create hunting rule
Author:@VK_Intel
Description:Detects Avaddon ransomware
Reference:https://twitter.com/VK_Intel/status/1300944441390370819

File information

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

Malspam

Formbook

rar b863487ca0af85c82ef6d4d07646e3c940afecef49ff81e2ad20c8f4063b33f5

Formbook

Executable exe b2f4176efc7fb22a1958f63af6f3029b8d4fdbecb98625828822d471a6a137b4

(this sample)

  
Dropped by
MD5 5da2c36a1abb902cd71f14f87d0baa36
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 b863487ca0af85c82ef6d4d07646e3c940afecef49ff81e2ad20c8f4063b33f5

Comments