MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 cb5d83a08a825fccf4a52e24c65f51b995ec34053194d7ff749fced8cc5d3fc6. 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: 13


Intelligence 13 IOCs YARA 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: cb5d83a08a825fccf4a52e24c65f51b995ec34053194d7ff749fced8cc5d3fc6
SHA3-384 hash: 9f5bce55b32732424f8e68e0a167901fd80281317e03acc968036f15c6fef28a5cb61c6cbfd061bb0744230f385b1069
SHA1 hash: 972660f1b3506bcf31a3e0ff034ff3bb3a9e1f39
MD5 hash: b11c5b1e7446dd3f2675612b2d956357
humanhash: cup-colorado-sierra-muppet
File name:Arrival Notice.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:742'400 bytes
First seen:2021-08-31 12:52:56 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 6144:Xwv3TNcC1lK1pgMafFTc3sk6Fx8saQdjwdonKMICD4M1nJEQKgRJR1Y0M:XS2wlKnHUFTwws+udwBfFXBJR1Y5
Threatray 8'660 similar samples on MalwareBazaar
TLSH T1FBF4FB7F19BDA127A175C2F58BE38413F0018BAF31206925B6D647164327A7AB5F332E
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
213
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Arrival Notice.exe
Verdict:
Malicious activity
Analysis date:
2021-08-31 16:13:01 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/81c063d8-d1dc-41bb-bd28-ca6b915164e3

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/184204/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
DNS request
Sending a UDP request
Unauthorized injection to a recently created process
Creating a file
Launching a process
Launching cmd.exe command interpreter
Forced shutdown of a system process
Unauthorized injection to a system process
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/c50e924c-4d97-432e-bc8a-debbb9442b86
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/842631
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
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
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
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: 475059 Sample: Arrival Notice.exe Startdate: 31/08/2021 Architecture: WINDOWS Score: 100 31 www.pain.party 2->31 33 pain.party 2->33 35 www.amrjewelryboutique.com 2->35 43 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->43 45 Found malware configuration 2->45 47 Malicious sample detected (through community Yara rule) 2->47 49 9 other signatures 2->49 11 Arrival Notice.exe 3 2->11         started        signatures3 process4 file5 29 C:\Users\user\...\Arrival Notice.exe.log, ASCII 11->29 dropped 61 Injects a PE file into a foreign processes 11->61 15 Arrival Notice.exe 11->15         started        signatures6 process7 signatures8 63 Modifies the context of a thread in another process (thread injection) 15->63 65 Maps a DLL or memory area into another process 15->65 67 Sample uses process hollowing technique 15->67 69 Queues an APC in another process (thread injection) 15->69 18 explorer.exe 15->18 injected process9 dnsIp10 37 www.stresscription.com 91.195.240.117, 49723, 80 SEDO-ASDE Germany 18->37 39 www.firmament.one 74.208.236.217, 49717, 80 ONEANDONE-ASBrauerstrasse48DE United States 18->39 41 8 other IPs or domains 18->41 51 System process connects to network (likely due to code injection or exploit) 18->51 22 control.exe 18->22         started        signatures11 process12 signatures13 53 Self deletion via cmd delete 22->53 55 Modifies the context of a thread in another process (thread injection) 22->55 57 Maps a DLL or memory area into another process 22->57 59 Tries to detect virtualization through RDTSC time measurements 22->59 25 cmd.exe 1 22->25         started        process14 process15 27 conhost.exe 25->27         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/cb5d83a08a825fccf4a52e24c65f51b995ec34053194d7ff749fced8cc5d3fc6/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-08-31 08:55:00 UTC
AV detection:
7 of 33 (21.21%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=znoyhiekqjp4z5fffysmmx2rxgk6ynafggknp73ut7hnrtc5h7da._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
1910086de9f1a5a56200a9936bbed7b5c80f9fc6a2c6612a0073bc0c9ba54861
Formbook
5955bf6676d1f4d7e9e12f2201674381535d24bd88bd480feda425839841ecaf
Formbook
5b81a9fbd9258eeaf34a38a2a3f53c2933c0c7c84addb4aa35463f77af0e43f0
Formbook
5e7b6e81d3f73322d73bf013d67f76e211f0e539296e00a53d93585b0c167ba2
Formbook
61be8eb2905c08febca2821b39701ea6a361ae21e807866d240b3b122221cf62
Formbook
6f1507120710fd267c7d2b6aa1d63cec192e4eb904675f260a8e2e18ebfc4b99
Formbook
6f9bd416549145039e3b6384bf2cba04924252fb3673bc3922a8af8dcb68e7d2
Formbook
a086821049463b0bfc414cb3763c4f82688182d2d018ae5c9cd472f59f9e36ff
Formbook
dc5f7d89ab2465597ff7fa9f544326613aeaab2afa6e2e457ba5fc0da15bd450
Formbook
+ 8'650 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:ez2z loader rat
Link:
https://tria.ge/reports/210831-rpcz88wves/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Xloader Payload
Xloader
Malware Config
C2 Extraction:
http://www.chriswrightt.com/ez2z/
Unpacked files
SH256 hash:
e0c99291ae7b961fe14792c39ed22172f1a407161c66b3e7a58a61e56774072f
MD5 hash:
6435a3d6fb444d2e8679ee00b1b2f25b
SHA1 hash:
37419ce689c6cbbcbd27daa44b5e35088be3e91c
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/05e34b71-c184-4dee-ac34-87cf90cc4863/
Parent samples :
cb5d83a08a825fccf4a52e24c65f51b995ec34053194d7ff749fced8cc5d3fc6
ba16d80b218d269fcc8beb82c0c21b9533f5976fd2af0c873d5598e6f4e90307
36c5cccf34914902e9e6f2a53f30d3efb3215aa9d7516a5e56ab97d2a287ac51
52c83128a5afe81533f6683e9fe4d53c6a00dd3b0650ee6136528114bef6117e
19445d7251f9c133c6bf786d987a6e333f6fcb0832f974a273ab73202a2e40c9
SH256 hash:
758763d712c27c53a8b85de07582c9a250638b557e8dcfbae7c278f810241ac1
MD5 hash:
8b7d29dc138f646510a835ffc76e6796
SHA1 hash:
bff289517dc53acc9e172e3445fc87d82f8ee351
Link:
https://www.unpac.me/results/05e34b71-c184-4dee-ac34-87cf90cc4863/
SH256 hash:
5d2bcf098197a979e27fc98e71c3848b0299dcfef267acbe66ebbe64483a5d04
MD5 hash:
7d9801d884e90b7e0e0d639f00d4ff7d
SHA1 hash:
26b38bad5c10bac5e481978236f687ddd33e83cf
Link:
https://www.unpac.me/results/05e34b71-c184-4dee-ac34-87cf90cc4863/
SH256 hash:
cb5d83a08a825fccf4a52e24c65f51b995ec34053194d7ff749fced8cc5d3fc6
MD5 hash:
b11c5b1e7446dd3f2675612b2d956357
SHA1 hash:
972660f1b3506bcf31a3e0ff034ff3bb3a9e1f39
Link:
https://www.unpac.me/results/05e34b71-c184-4dee-ac34-87cf90cc4863/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/cb5d83a08a825fccf4a52e24c65f51b995ec34053194d7ff749fced8cc5d3fc6

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:Formbook
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
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
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.formbook.

File information

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

Malspam

Formbook

Executable exe cb5d83a08a825fccf4a52e24c65f51b995ec34053194d7ff749fced8cc5d3fc6

(this sample)

  
Dropped by
Formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/184204/

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