MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 53c4fbd222a3aba4620b29b93114f02cd13a7dd7aff01a10e702fa2221ebe6f9. 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: 12


Intelligence 12 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 53c4fbd222a3aba4620b29b93114f02cd13a7dd7aff01a10e702fa2221ebe6f9
SHA3-384 hash: 4c3025f572bb26af10a8918634e0ed9642227ea1f563917136520eb7a9dabaf4e2f32a119238d6e2e5d4f8fed778bae3
SHA1 hash: d10e53ecab33850a5b8ecc10b699a46c52dd1162
MD5 hash: bc9aa18d2144f9383d36fe9376046a40
humanhash: december-ack-berlin-uranus
File name:Letter of Intent.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:699'904 bytes
First seen:2021-09-02 13:20:17 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'746 x AgentTesla, 19'628 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 6144:rNUZhLksFJLgGVAQO7oLhHLw+IVkfq4oen5NDDLBxh7bfK6BNnhoOFp6POpXaHNH:reZhwkV1HVIV743vDjRbfLBjHpXaAQY
Threatray 8'777 similar samples on MalwareBazaar
TLSH T1D9E41B3E19FE23279176C7D5CBE48823F6D098AF3233A96467D747264316A4634C322E
Reporter GovCERT_CH
Tags:exe FormBook xloader

Intelligence

File Origin
# of uploads :
1
# of downloads :
236
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Letter of Intent.exe
Verdict:
Malicious activity
Analysis date:
2021-09-02 16:42:54 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/df3e04d2-3064-43a0-8ace-cb43bd4275c8

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/184774/
Detection(s):
SecuriteInfo.com.Trojan.Siggen9.48175.29617.6225.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Launching a process
Creating a file
Launching cmd.exe command interpreter
Forced shutdown of a system process
Unauthorized injection to a system process
Malware family:
NanoCoreRAT
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/0198fc00-5492-4c67-9c8a-674fb84f6761
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/844131
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Found malware configuration
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
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Sigma detected: CMSTP Execution Process Creation
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
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 476569 Sample: Letter of Intent.exe Startdate: 02/09/2021 Architecture: WINDOWS Score: 100 33 www.masterygene.com 2->33 35 www.imbracesupportprogram.com 2->35 37 825610.parkingcrew.net 2->37 45 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->45 47 Found malware configuration 2->47 49 Malicious sample detected (through community Yara rule) 2->49 51 9 other signatures 2->51 11 Letter of Intent.exe 3 2->11         started        signatures3 process4 file5 31 C:\Users\user\...\Letter of Intent.exe.log, ASCII 11->31 dropped 63 Writes to foreign memory regions 11->63 65 Allocates memory in foreign processes 11->65 67 Injects a PE file into a foreign processes 11->67 15 RegSvcs.exe 11->15         started        18 RegSvcs.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 77 Tries to detect virtualization through RDTSC time measurements 18->77 process9 dnsIp10 39 www.zbarsoni.xyz 20->39 41 www.youressentialwellbeing.com 156.242.151.99, 49730, 80 POWERLINE-AS-APPOWERLINEDATACENTERHK Seychelles 20->41 43 8 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 cmstp.exe 20->24         started        signatures11 process12 signatures13 57 Modifies the context of a thread in another process (thread injection) 24->57 59 Maps a DLL or memory area into another process 24->59 61 Tries to detect virtualization through RDTSC time measurements 24->61 27 cmd.exe 1 24->27         started        process14 process15 29 conhost.exe 27->29         started       
Detection:
xloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/53c4fbd222a3aba4620b29b93114f02cd13a7dd7aff01a10e702fa2221ebe6f9/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-09-02 10:26:19 UTC
AV detection:
16 of 28 (57.14%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=kpcpxurcuov2iyqlfg4tcfhqftitu7oxv7ybuehhal5ceipl434q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
24133d4dad6ae66b6b08df65dd8e1d66e589c0fbc2ae770320eafa4d7079231e
Formbook
55f06aa36a715afaa715697f490114fdaaa854f1a62d24d8df024fdc95cd1435
Formbook
5955bf6676d1f4d7e9e12f2201674381535d24bd88bd480feda425839841ecaf
Formbook
a728204cf53dff3c0f93facfa43a189166caf917e31e85c3ff3b773ecf0cb9b6
Formbook
b5a2c6ad35eae14ca13d811a3a1a445fabee8a8aa63625f25520375a20fe44bd
Formbook
d2ebab1807dd44bad7b61ac4b53e5d4e8dcdd1daa20d521c778400610fc1a252
Formbook
e38f60c9ff210681232148c43db51f11967e6360940b50a646c8edb472fb1c42
Formbook
fdd78bbf6d05b69fbdcaa24727822f1ec7e9b652266ac34ed69916537e6aeff2
Formbook
+ 8'767 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:m6ss loader rat
Link:
https://tria.ge/reports/210902-qlnj2saac3/
Behaviour
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
Xloader Payload
Xloader
Malware Config
C2 Extraction:
http://www.datingexrt.com/m6ss/
Unpacked files
SH256 hash:
352d741aed964442581e1bcd713c31845b4551d177bed271a9af8a49258eba39
MD5 hash:
5293c52f5fa8c7228db0afb565090107
SHA1 hash:
cbae4b46f1bd9aadac4a9f5f57b18fd0c42edc09
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/5e1bcc81-65ca-4d47-8fa4-87320b3f837b/
SH256 hash:
758763d712c27c53a8b85de07582c9a250638b557e8dcfbae7c278f810241ac1
MD5 hash:
8b7d29dc138f646510a835ffc76e6796
SHA1 hash:
bff289517dc53acc9e172e3445fc87d82f8ee351
Link:
https://www.unpac.me/results/5e1bcc81-65ca-4d47-8fa4-87320b3f837b/
SH256 hash:
c6c137695acedc351fc8bdd9f5d5c715686162e060afc9f1f44b85689893e76f
MD5 hash:
691a964160c871e3f723215bd879ac8d
SHA1 hash:
b9d35029c2297ad79c2a307a05a093ca3fe34771
Link:
https://www.unpac.me/results/5e1bcc81-65ca-4d47-8fa4-87320b3f837b/
SH256 hash:
53c4fbd222a3aba4620b29b93114f02cd13a7dd7aff01a10e702fa2221ebe6f9
MD5 hash:
bc9aa18d2144f9383d36fe9376046a40
SHA1 hash:
d10e53ecab33850a5b8ecc10b699a46c52dd1162
Link:
https://www.unpac.me/results/5e1bcc81-65ca-4d47-8fa4-87320b3f837b/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/53c4fbd222a3/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.81
Link:
https://yomi.yoroi.company/submissions/53c4fbd222a3aba4620b29b93114f02cd13a7dd7aff01a10e702fa2221ebe6f9

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

Malspam

Formbook

Executable exe 53c4fbd222a3aba4620b29b93114f02cd13a7dd7aff01a10e702fa2221ebe6f9

(this sample)

  
Dropped by
xloader
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/184774/

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