MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 81d263a31fc8b6fe2e2db250efd4314912eb09a11027a6cfc67257d7fa5e071a. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 81d263a31fc8b6fe2e2db250efd4314912eb09a11027a6cfc67257d7fa5e071a
SHA3-384 hash: caefa485280751b331bc063d256cf36dd59a8fc1428aaef3dfb54fe19ee372ddd7a9baf77f4135da5f0583d83abb4be5
SHA1 hash: d6bbe45bccd177c75648ddf45db11f0e6ee808e5
MD5 hash: 66474aafcf1b5dae6da44f0965ee5e29
humanhash: aspen-ohio-avocado-mississippi
File name:Updated SOA 210920.PDF.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:517'120 bytes
First seen:2021-09-22 12:14:28 UTC
Last seen:2021-09-23 06:31:10 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:ixEx9mtiK5oB1E+kMxFmw5FAiJ+pGlmhSYcfGUkc6vZxhe:v+FoB19fmw0iJNm/cfGUkdZ7
Threatray 9'488 similar samples on MalwareBazaar
TLSH T177B41238E1A8D774DA788BFE2021412D0FF4E08AB523F75A5FD670CD6E067969005EB6
Reporter cocaman
Tags:exe FormBook INVOICE

Intelligence

File Origin
# of uploads :
3
# of downloads :
218
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Updated SOA 210920.PDF.exe
Verdict:
Malicious activity
Analysis date:
2021-09-22 12:20:53 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/38f3a4f8-c919-4c3e-98a6-839bebcee8db

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/190156/
Detection(s):
SecuriteInfo.com.Variant.MSILHeracles.26929.308.6007.UNOFFICIAL
Create hunting rule

Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/b76ce54c-42d2-4264-8495-49121e58853e
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/855555
Signature
.NET source code contains potential unpacker
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
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
Self deletion via cmd delete
Sigma detected: Suspicious Double Extension
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
Uses an obfuscated file name to hide its real file extension (double extension)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 487986 Sample: Updated SOA 210920.PDF.exe Startdate: 22/09/2021 Architecture: WINDOWS Score: 100 31 www.thoracicsurgeondebate.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 11 other signatures 2->45 11 Updated SOA 210920.PDF.exe 3 2->11         started        signatures3 process4 file5 29 C:\Users\...\Updated SOA 210920.PDF.exe.log, ASCII 11->29 dropped 57 Injects a PE file into a foreign processes 11->57 15 Updated SOA 210920.PDF.exe 11->15         started        signatures6 process7 signatures8 59 Modifies the context of a thread in another process (thread injection) 15->59 61 Maps a DLL or memory area into another process 15->61 63 Sample uses process hollowing technique 15->63 65 Queues an APC in another process (thread injection) 15->65 18 explorer.exe 15->18 injected process9 dnsIp10 33 www.freesoft.pro 103.224.212.221, 49782, 80 TRELLIAN-AS-APTrellianPtyLimitedAU Australia 18->33 35 wfot2002.com 154.213.157.14, 49788, 80 POWERLINE-AS-APPOWERLINEDATACENTERHK Seychelles 18->35 37 14 other IPs or domains 18->37 47 System process connects to network (likely due to code injection or exploit) 18->47 22 chkdsk.exe 18->22         started        signatures11 process12 signatures13 49 Self deletion via cmd delete 22->49 51 Modifies the context of a thread in another process (thread injection) 22->51 53 Maps a DLL or memory area into another process 22->53 55 Tries to detect virtualization through RDTSC time measurements 22->55 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/81d263a31fc8b6fe2e2db250efd4314912eb09a11027a6cfc67257d7fa5e071a/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-09-22 06:28:11 UTC
AV detection:
20 of 28 (71.43%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=qhjghiy7zc3p4lrnwjio7vbrjejowcnbcat2nt6gojl5p6s6a4na._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
1771bccdd4c4fdc7d50d97ac10e5b1e0f980a4ff31233c59e9cfa17e9cd36a24
Formbook
2fc82f206abb0d6d6b4d7a916be93b408ab78f848531917b3968b066a5a31023
Formbook
306f86752e3ae1a4baa4687d06759b43cbcb47a6ded4073b2e066b72ac4054ce
Formbook
3ac2da7ec8b0c46550c9b85707c4743ea4cacbb5bb6ee0fd159792f3978e3ad3
Formbook
3f5c235293cfdde26a725b19b3cbaefc44dae026b7dff9124002f42e564df18b
Formbook
40da3a76d7dfbe395b879dc9b090af73483617c65c7c433975490c0a22e4a71a
Formbook
5207ba9f0497c5501d346254a91fb60959f475d7d77b6b1d959048675e99848d
Formbook
768252369536d1e56aad57c5015925ec464642d13d76468db72e60f9ac4e1a54
Formbook
fa9bd0ededa6a35bd948c884848855568c1efd4e77bd2ca7786144f81d3f64c5
Formbook
+ 9'478 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:ny9y loader rat suricata
Link:
https://tria.ge/reports/210922-pexnpsfbcj/
Behaviour
Gathers network information
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.caddomain.com/ny9y/
Unpacked files
SH256 hash:
06f0330a6556b9de5785355f390c5fffd8979d6040a6140b0e30e1665d02098f
MD5 hash:
72a2c6697c6b66ea178d84b6de8ee70f
SHA1 hash:
46ee7e83f153193f82ad82fb44b3e26362c8a659
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/e86344b4-6a8d-4cdb-97b8-2185f9a53900/
Parent samples :
768252369536d1e56aad57c5015925ec464642d13d76468db72e60f9ac4e1a54
81d263a31fc8b6fe2e2db250efd4314912eb09a11027a6cfc67257d7fa5e071a
387508d9f7c0d79b09bde31b037d1c43ceb1ce799a0cc94a77a20226477b47f7
4dfab25d3ccff9a33396c252590c27c57f23f9a94b11ebd9834b23981b0908e6
22ccfaaf35443526ee17c510270e538f8e1289b85963007ea711132094b25d33
SH256 hash:
cac8b347040a359c02ae5e658d3d76230c7dd7eb33505605ed0b9bc49ff268c7
MD5 hash:
71a894ff252c767b80d65ab1e54fda2b
SHA1 hash:
bcc4ff628585ca28b8b0f2c30e63049b910d4d49
Link:
https://www.unpac.me/results/e86344b4-6a8d-4cdb-97b8-2185f9a53900/
SH256 hash:
dd798dbdd2f1ab9ba0945a5c693dd9c4d8cee85381a3066b7822a9078b4c73e7
MD5 hash:
1b592ec6d8a9c3c4358db79f10826075
SHA1 hash:
bc3e2e02c023785fa77ee6eea066eb18650b6ed9
Link:
https://www.unpac.me/results/e86344b4-6a8d-4cdb-97b8-2185f9a53900/
SH256 hash:
daa5ace78573ea0b9e132afca985b626eef23e480a4653e3c0782c59e9072eb9
MD5 hash:
37378141f621b506b4f5254badc90c26
SHA1 hash:
0f96ca0c96c237ad205891f8d27b8a41627de154
Link:
https://www.unpac.me/results/e86344b4-6a8d-4cdb-97b8-2185f9a53900/
SH256 hash:
81d263a31fc8b6fe2e2db250efd4314912eb09a11027a6cfc67257d7fa5e071a
MD5 hash:
66474aafcf1b5dae6da44f0965ee5e29
SHA1 hash:
d6bbe45bccd177c75648ddf45db11f0e6ee808e5
Link:
https://www.unpac.me/results/e86344b4-6a8d-4cdb-97b8-2185f9a53900/
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/81d263a31fc8b6fe2e2db250efd4314912eb09a11027a6cfc67257d7fa5e071a

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.

Malspam

Formbook

zip de12c9134fcde73ecd31ab3feceb690c5444c713c81ff16948d748df282348c8

Formbook

Executable exe 81d263a31fc8b6fe2e2db250efd4314912eb09a11027a6cfc67257d7fa5e071a

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 de12c9134fcde73ecd31ab3feceb690c5444c713c81ff16948d748df282348c8
Cape
Cape
https://www.capesandbox.com/analysis/190156/
  
Dropped by
SHA256 46d794eeb2f224b23aff07f9b252796591a454d14a25753599bac0ed9b685832

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