MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 662ae2a76488e0f775884f0c19daa286c910f2e72acb414a5f820b655ef42565. 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 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 662ae2a76488e0f775884f0c19daa286c910f2e72acb414a5f820b655ef42565
SHA3-384 hash: 050c883d33f50a65c397a1430ecc3f9226f328057c743fe1ce0499c59d5b0da2bc04894503b2bcddff7bc09ba1ea8535
SHA1 hash: 9c61fbf1b27de772aebde4825a66b6da8bbf7517
MD5 hash: 662ccb9b69a33a02460b368c77b17f04
humanhash: west-happy-chicken-happy
File name:RFQ_Beijing Chengruisi Manufacturing_pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:775'168 bytes
First seen:2021-09-23 00:55:35 UTC
Last seen:Never
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:wrNdDymtiK5oNCUO87ke0ElVxl1OY7aAibu2N+Xsv4ZQtZ8uTk:kNE+FoIUIkVOkqu20NQNT
TLSH T12CF479C46E888603D3A55632DC5D6205326C1C0A3723875BEBE53D7B3EFE293C52D99A
File icon (PE):PE icon
dhash icon a28aa2e2e0aaa2a2 (14 x Formbook, 11 x AgentTesla, 5 x SnakeKeylogger)
Reporter GovCERT_CH
Tags:exe FormBook xloader

Intelligence

File Origin
# of uploads :
1
# of downloads :
296
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
RFQ_Beijing Chengruisi Manufacturing_pdf.exe
Verdict:
Malicious activity
Analysis date:
2021-09-23 00:59:09 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/9a195275-87fc-4bbf-92d2-773fab2945c5

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/190440/
Detection(s):
SecuriteInfo.com.Variant.MSILHeracles.26929.UNOFFICIAL
Create hunting rule

Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/4d241257-d779-4c49-8c76-4a61a21599bf
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/856091
Signature
Antivirus detection for URL or domain
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
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: 488519 Sample: RFQ_Beijing Chengruisi Manu... Startdate: 23/09/2021 Architecture: WINDOWS Score: 100 31 www.235296tyc.com 2->31 39 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->39 41 Found malware configuration 2->41 43 Malicious sample detected (through community Yara rule) 2->43 45 8 other signatures 2->45 11 RFQ_Beijing Chengruisi Manufacturing_pdf.exe 3 2->11         started        signatures3 process4 file5 29 RFQ_Beijing Chengr...cturing_pdf.exe.log, ASCII 11->29 dropped 59 Injects a PE file into a foreign processes 11->59 15 RFQ_Beijing Chengruisi Manufacturing_pdf.exe 11->15         started        signatures6 process7 signatures8 61 Modifies the context of a thread in another process (thread injection) 15->61 63 Maps a DLL or memory area into another process 15->63 65 Sample uses process hollowing technique 15->65 67 Queues an APC in another process (thread injection) 15->67 18 explorer.exe 15->18 injected process9 dnsIp10 33 www.barwg.com 23.80.120.84, 49804, 80 LEASEWEB-USA-LAX-11US United States 18->33 35 www.londonescort.xyz 172.67.143.218, 49818, 80 CLOUDFLARENETUS United States 18->35 37 7 other IPs or domains 18->37 47 System process connects to network (likely due to code injection or exploit) 18->47 49 Performs DNS queries to domains with low reputation 18->49 22 control.exe 18->22         started        signatures11 process12 signatures13 51 Self deletion via cmd delete 22->51 53 Modifies the context of a thread in another process (thread injection) 22->53 55 Maps a DLL or memory area into another process 22->55 57 Tries to detect virtualization through RDTSC time measurements 22->57 25 cmd.exe 1 22->25         started        process14 process15 27 conhost.exe 25->27         started       
Detection:
xloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/662ae2a76488e0f775884f0c19daa286c910f2e72acb414a5f820b655ef42565/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-09-23 00:56:08 UTC
AV detection:
13 of 28 (46.43%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=myvofj3erdqpo5mij4gbtwvcq3erb4xhflfucss7qifwkxxuevsq._file
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:euzn loader rat
Link:
https://tria.ge/reports/210923-bac7lsebc4/
Behaviour
Enumerates system info in registry
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
Blocklisted process makes network request
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/d96bbb0e-0a46-43ab-980f-7815ea83727e/
Parent samples :
a0d1e3fbe11fcbbea9dcad1880e23ea531c01c20fbbf383174cd420349657a01
a243b394a1a3377b3ae936e6ea896588cca8cc43f8b961bdecbbe324e28c283c
662ae2a76488e0f775884f0c19daa286c910f2e72acb414a5f820b655ef42565
3dafcb39d7cc251c9a8212a8e745e0d72f2c530bf699a9168a379fa25e36ec38
7b5de7135bd7e3c2eb98a94977c138597d357def8a9851a8df3ee442f83ec737
6446736e3662120e1fe4c3518bc8e6d14553f6b0b27aaf1fc5676e1f73a50c33
17ed64707506c917be6329e1cbe94548d761d218dc8e2d624eab99565acc055d
9508c04b4c1dd578c8c3b8597a68bb73548b107edcbb37f13909a18d85f78b3a
SH256 hash:
30ac9ca874282da2d97cd13b935ba4348469bb1b09864dbb35f23d9b2fbdcd30
MD5 hash:
a399eaa1c0669eb6b4a4c27f49216396
SHA1 hash:
d6d847b1e39d1b05fe7766269f9b74ef1b7400cf
Link:
https://www.unpac.me/results/d96bbb0e-0a46-43ab-980f-7815ea83727e/
SH256 hash:
cac8b347040a359c02ae5e658d3d76230c7dd7eb33505605ed0b9bc49ff268c7
MD5 hash:
71a894ff252c767b80d65ab1e54fda2b
SHA1 hash:
bcc4ff628585ca28b8b0f2c30e63049b910d4d49
Link:
https://www.unpac.me/results/d96bbb0e-0a46-43ab-980f-7815ea83727e/
SH256 hash:
f4f2ef41a0af903fad345b6499f7157803fea6ec490447275f461ed588e23198
MD5 hash:
9395466d72345d6cc6c831e74bb8a0fc
SHA1 hash:
6fcc9d534b6ed30af497fa150065ec5b784f19a9
Link:
https://www.unpac.me/results/d96bbb0e-0a46-43ab-980f-7815ea83727e/
SH256 hash:
662ae2a76488e0f775884f0c19daa286c910f2e72acb414a5f820b655ef42565
MD5 hash:
662ccb9b69a33a02460b368c77b17f04
SHA1 hash:
9c61fbf1b27de772aebde4825a66b6da8bbf7517
Link:
https://www.unpac.me/results/d96bbb0e-0a46-43ab-980f-7815ea83727e/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.99
Link:
https://yomi.yoroi.company/submissions/662ae2a76488e0f775884f0c19daa286c910f2e72acb414a5f820b655ef42565

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 662ae2a76488e0f775884f0c19daa286c910f2e72acb414a5f820b655ef42565

(this sample)

  
Dropped by
xloader
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/190440/

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