MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f66b4cbcde98ac876118266f3b3456ef620d94f6cd99468cbd7d7d803e2edf6f. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: f66b4cbcde98ac876118266f3b3456ef620d94f6cd99468cbd7d7d803e2edf6f
SHA3-384 hash: bc831e00d3e9534b78cc69bfb7071309c7e78307f81818298aadf42fe32c419f8ecc23ee9b0f4e3ca7d3aeafce1416d8
SHA1 hash: fb8aabd321f6d13d6258b06b497b724e241f9d2f
MD5 hash: fc633c4e726243e07d8a1c28c67de8af
humanhash: ack-massachusetts-moon-nitrogen
File name:doc 202307688990001.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:591'360 bytes
First seen:2023-10-23 10:39:57 UTC
Last seen:2023-10-23 11:51:20 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:qYq7XFwyqW2DXV8iJJUMLvJJlNDnhBGMl8StoHTy0xMh+zT2bDnoGn:qY8XV27eOJFvhSmIM4P2nT
Threatray 19 similar samples on MalwareBazaar
TLSH T161C40182B3984B62D8AE47B18425C631E73065186C63DEB0CC859ED7B6D9B131DAFCC3
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10523/12/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
File icon (PE):PE icon
dhash icon f8bc3c44ccdcd088 (8 x SnakeKeylogger, 3 x Formbook, 3 x PureCrypter)
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
309
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
doc 202307688990001.exe
Verdict:
Malicious activity
Analysis date:
2023-10-23 11:00:27 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/6ea6f6a5-2fe9-4185-a560-a16e657b6422

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Porcupine.Malware.58887.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/65364d864678fc28dfc5d5c3/reports/a18979a1-ee93-4fc6-a8cb-bfa77eb2887e/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/f66b4cbcde98ac876118266f3b3456ef620d94f6cd99468cbd7d7d803e2edf6f
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.
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/25ed1103-d31e-44b2-b1f1-776f246a638c
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1330493
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Deletes itself after installation
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 domain / URL
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
System process connects to network (likely due to code injection or exploit)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1330493 Sample: doc_202307688990001.exe Startdate: 23/10/2023 Architecture: WINDOWS Score: 100 30 www.zeebay.xyz 2->30 32 www.waktugaspoolne3.xyz 2->32 34 3 other IPs or domains 2->34 44 Multi AV Scanner detection for domain / URL 2->44 46 Malicious sample detected (through community Yara rule) 2->46 48 Antivirus detection for URL or domain 2->48 50 9 other signatures 2->50 10 doc_202307688990001.exe 3 2->10         started        signatures3 process4 signatures5 62 Injects a PE file into a foreign processes 10->62 13 doc_202307688990001.exe 10->13         started        process6 signatures7 64 Maps a DLL or memory area into another process 13->64 66 Queues an APC in another process (thread injection) 13->66 16 cSupxRmTZsvCKVZQYIj.exe 13->16 injected process8 signatures9 42 Sample uses process hollowing technique 16->42 19 svchost.exe 13 16->19         started        process10 signatures11 52 Tries to steal Mail credentials (via file / registry access) 19->52 54 Tries to harvest and steal browser information (history, passwords, etc) 19->54 56 Deletes itself after installation 19->56 58 4 other signatures 19->58 22 explorer.exe 2 1 19->22 injected 26 cSupxRmTZsvCKVZQYIj.exe 19->26 injected 28 firefox.exe 19->28         started        process12 dnsIp13 36 www.hlteuo.com 104.21.83.250, 49747, 49748, 49749 CLOUDFLARENETUS United States 22->36 38 www.zeebay.xyz 66.29.151.121, 80 ADVANTAGECOMUS United States 22->38 40 www.xn--cailang1-ml9sl35r.xyz 35.186.197.188, 49746, 80 GOOGLEUS United States 22->40 60 System process connects to network (likely due to code injection or exploit) 22->60 signatures14
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/f66b4cbcde98ac876118266f3b3456ef620d94f6cd99468cbd7d7d803e2edf6f
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/f66b4cbcde98ac876118266f3b3456ef620d94f6cd99468cbd7d7d803e2edf6f/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2023-07-28 03:43:00 UTC
AV detection:
20 of 23 (86.96%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=6zvuzpg6tcwioyiyezxtwncw55ra3fhwzwmundf5pv6yapro35xq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
0958d840bb001dab5c73ea644bb8a32a3c28e41f80b93833d54f2ac1e4e11472
Formbook
125795e7202c3c893931f96948ab5841d6abd6ad381fec028a173c46b84775d9
Formbook
3ff320e3607b1dfa12d8a8fdc4e4b8b34368cd47d848e39f30cc4d260fc612f8
Formbook
4a0717822fdb16a4e467b0c6737bebcaa7e81ea751da1191703de6f7f91276de
Formbook
67222bd90963f902c0c643a0e7bcc6f64d5fa4bc203bed774981c03f91168c31
Formbook
6e3da175f5206be5727c700d9e583cc08d7edf2d975b993cf0d74f4e920acf50
Formbook
7c0cd3853233771f97e91d68981a1c5e00fa37263e4d1bb2e9cd6a3afb57a82c
Formbook
84b98954dbed9b7e46fa6740f3352352b1f7a0d2200b2f42c2e319b6bcb2c208
Formbook
e36f208df0d1c7cc3079abcb4e0d97caa7ae44fcf5603f73870043f146dd6216
Formbook
f5aa5998a1ce5f16b177ba33712da9c3049fdb0c9ddedb1031dfd0233372ab1d
Formbook
+ 9 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/231023-mqjvwafh4t/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Checks computer location settings
Unpacked files
SH256 hash:
837ad2f4eb2b5d7a803f83f2a7fda4bdb8021a77973ccad0078c12a07b23b5c7
MD5 hash:
55833ee79ed78aa191cc946542d1f37e
SHA1 hash:
d28f145f4a0aac9e647c0773a29f64a94fa8b439
Detections:
win_formbook_w0
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/2adeb414-6fa1-4b44-923a-16a4d2ae2191/
Parent samples :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 hash:
dc6df300e0c466d84ceddc5a91b36aeb84e19230d0264e3c149a646fc4f9537d
MD5 hash:
9c96ab224698a4e6054f9d313e7370eb
SHA1 hash:
c1a15f01deefb9c5f4ca9269720d795954402840
Link:
https://www.unpac.me/results/2adeb414-6fa1-4b44-923a-16a4d2ae2191/
SH256 hash:
53f2ad060cf771aa4f197df5789cee95959480c244a0b392bb450c8ce7311d77
MD5 hash:
37e82d3e2864e27b34f5fbacaea759c3
SHA1 hash:
a87024a466e052bff09a170bb8c6f374f6c84c32
Link:
https://www.unpac.me/results/2adeb414-6fa1-4b44-923a-16a4d2ae2191/
SH256 hash:
5340d592870c0a98cfe94c2995f560fdb65380074518cf01a4bd2b80d0af9828
MD5 hash:
679a3bc64248c3e952bbdad317871d0b
SHA1 hash:
718d25dc48a0be3a72f8a80b9b8b5142532a8300
Link:
https://www.unpac.me/results/2adeb414-6fa1-4b44-923a-16a4d2ae2191/
SH256 hash:
28f47f18ae8466673ee87ba144a9fe63ea2ed5ee3fad610ad938db1c98f00298
MD5 hash:
98ea686554a02bf4ae9dbf2ed087cd1c
SHA1 hash:
436d1042f56b40eff60df7bc136ffbe6a55e4f03
Link:
https://www.unpac.me/results/2adeb414-6fa1-4b44-923a-16a4d2ae2191/
SH256 hash:
f66b4cbcde98ac876118266f3b3456ef620d94f6cd99468cbd7d7d803e2edf6f
MD5 hash:
fc633c4e726243e07d8a1c28c67de8af
SHA1 hash:
fb8aabd321f6d13d6258b06b497b724e241f9d2f
Link:
https://www.unpac.me/results/2adeb414-6fa1-4b44-923a-16a4d2ae2191/
Please note that we are no longer able to provide a coverage score for Virus Total.

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:AgentTesla_DIFF_Common_Strings_01
Create hunting rule
Author:schmidtsz
Description:Identify partial Agent Tesla strings
Rule name:NET
Create hunting rule
Author:malware-lu
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 f66b4cbcde98ac876118266f3b3456ef620d94f6cd99468cbd7d7d803e2edf6f

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments