MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c991bf983458f62d5c6fe6dd695b5d7e13a07a35228cd0b677afd6b6da6a5e1a. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c991bf983458f62d5c6fe6dd695b5d7e13a07a35228cd0b677afd6b6da6a5e1a
SHA3-384 hash: a3ce55941aae105b7ddf856c67ec3ce7eb9af1410c8c58c71d8a5603a37a52e192f996c9423c453237da84d3bfa26d51
SHA1 hash: 27ac8143d42a6c42b64f6cab74800a6be0697d5b
MD5 hash: 1769589c5e336e15b77de5cb960e1fd0
humanhash: six-bluebird-don-four
File name:000335308232021.bat
Download: download sample
Signature Formbook
Create hunting rule
File size:734'208 bytes
First seen:2021-08-23 14:35:29 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'452 x Formbook, 12'201 x SnakeKeylogger)
ssdeep 12288:h56m+o/WEdMvu+9pdDpLDAAbPfk/DTlF/gBgfQocqPjNvrEt4Vdzq31kTqrdsix/:6mT/WEdMmspUIPmEYQEvgWduFWy
Threatray 8'268 similar samples on MalwareBazaar
TLSH T108F402453396F68FE63F8D7A99115C609BA1F4350307DB1BACC312EC9A9D7898B412B3
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
293
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
000335308232021.bat
Verdict:
Malicious activity
Analysis date:
2021-08-23 15:07:29 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/f566c518-d508-4775-b419-721f3be72abc

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/181525/
Detection(s):
SecuriteInfo.com.Trojan.Win32.Save.a.11207.19424.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Unauthorized injection to a recently created process
Creating a file
Launching a process
Launching cmd.exe command interpreter
Setting browser functions hooks
Unauthorized injection to a system process
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/a6886c96-d1d4-4695-943f-b028d816bd7b
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/837641
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
C2 URLs / IPs found in malware configuration
Found malware configuration
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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Suspicious Svchost Process
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: 470075 Sample: 000335308232021.bat Startdate: 23/08/2021 Architecture: WINDOWS Score: 100 33 www.onlinemusiclessons.info 2->33 35 onlinemusiclessons.info 2->35 37 clientconfig.passport.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 10 other signatures 2->51 11 000335308232021.exe 3 2->11         started        signatures3 process4 file5 31 C:\Users\user\...\000335308232021.exe.log, ASCII 11->31 dropped 61 Tries to detect virtualization through RDTSC time measurements 11->61 63 Injects a PE file into a foreign processes 11->63 15 000335308232021.exe 11->15         started        signatures6 process7 signatures8 65 Modifies the context of a thread in another process (thread injection) 15->65 67 Maps a DLL or memory area into another process 15->67 69 Sample uses process hollowing technique 15->69 71 Queues an APC in another process (thread injection) 15->71 18 explorer.exe 15->18 injected 22 svchost.exe 1 15->22         started        process9 dnsIp10 39 netechsupport.com 199.107.166.116, 49717, 80 STERLINGUS United States 18->39 41 www.oorulyh.icu 47.91.170.222, 49715, 80 CNNIC-ALIBABA-US-NET-APAlibabaUSTechnologyCoLtdC United States 18->41 43 www.netechsupport.com 18->43 53 System process connects to network (likely due to code injection or exploit) 18->53 24 colorcpl.exe 18->24         started        signatures11 process12 signatures13 55 Modifies the context of a thread in another process (thread injection) 24->55 57 Maps a DLL or memory area into another process 24->57 59 Tries to detect virtualization through RDTSC time measurements 24->59 27 cmd.exe 1 24->27         started        process14 process15 29 conhost.exe 27->29         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/c991bf983458f62d5c6fe6dd695b5d7e13a07a35228cd0b677afd6b6da6a5e1a/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-08-23 11:39:18 UTC
AV detection:
16 of 28 (57.14%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=zgi37gbuld3c2xdp43owsw25pyj2a6rvekgnbntxv7llnwtklyna._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
006dac8da13a28a8c98c6ec8ef112ee55544e0c4676cd2ffb393cb3cd66ebe15
Formbook
42c87021e56190f67716d25a66a6542bd352a66c6c352d74c60af681a187d336
Formbook
501242ffaabd951fbd62a6b12cfe8955915f65acc7d6c99effd41366054ccdca
Formbook
537bcb10c903cef3b3ce38482dd1cde1f5723e8b1b928fcf28d1ba6773995b37
Formbook
bd344e9b926eee15597f199bc4d8a8b368a881dd572ed2d8a57a1200c767b0fc
Formbook
ecacac4e9f514e780ff7124b6fdd97251dcec9947d5815166b2b57d2a41ddf0e
Formbook
f37a8771594f5f11d6ce79551120f5d5c74ed90ae6372b98724864f07023cc34
Formbook
+ 8'258 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:gz92 rat spyware stealer trojan
Link:
https://tria.ge/reports/210823-v1acs34mjx/
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 UnmapMainImage
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Deletes itself
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.peggeorge.com/gz92/
Unpacked files
SH256 hash:
dd4970a99732c793b24634ae483f1267635b96973593fc8dc357163321116989
MD5 hash:
0a03e6f45b3daf3f2dee240a33df132c
SHA1 hash:
e4a377181e9dbed35cf9e52c80b97c4b7bb3c612
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/a5b57fcd-ccd3-4644-b445-7b31af33a880/
Parent samples :
f37a8771594f5f11d6ce79551120f5d5c74ed90ae6372b98724864f07023cc34
ecacac4e9f514e780ff7124b6fdd97251dcec9947d5815166b2b57d2a41ddf0e
006dac8da13a28a8c98c6ec8ef112ee55544e0c4676cd2ffb393cb3cd66ebe15
d9993a3a31c12b8f8c15f571680a14fb426e28ecd130430a93e3b3cd34563ac0
42c87021e56190f67716d25a66a6542bd352a66c6c352d74c60af681a187d336
537bcb10c903cef3b3ce38482dd1cde1f5723e8b1b928fcf28d1ba6773995b37
bd344e9b926eee15597f199bc4d8a8b368a881dd572ed2d8a57a1200c767b0fc
9e03f772f926c5875d716ee78ba7e6477578a78f63880395b32565bcc09251f3
8d1770889689f693a9029f4f36a590297a38ef96cf606fa0b9cfd6a981b547d0
501242ffaabd951fbd62a6b12cfe8955915f65acc7d6c99effd41366054ccdca
c991bf983458f62d5c6fe6dd695b5d7e13a07a35228cd0b677afd6b6da6a5e1a
f5c01bcb12e33b32123e1345f1320bc5c4137cb26df006a6ec8a508fdaed4016
8d6843a7f3cf4ffef14d352860728eba74509878e32a29fb52fa398218a68f57
f658ac4fbbbd6c505cba225df9a6d177ba3de7d4a12a034df4ef17ae288cf069
468008f5f4996c03b06d6e74a95469acee7a352f8d6bb5e718d86707da7c7c0a
836579ca69ab6a19f5bbda57ab734abb715e0c7d8245ae0a9cb0e1b31b7ef437
475032f04ff405e24ecc5e2a93fb9c0c5fc037cc59e06b1772a8e60bc2dcadd1
cb63132b863557beac43df88e49f48fad74a31758a8a95f34ea14c6e00c9b843
b7645d8903647226e9271ca3bbad5a8bd73c622c0de9b9305f97d0fc65904134
7804b61e9db003a8c658d4288da507be6a478942229af9b4f0753dec75184b86
f9dc7de32eb824444dce368b02ff4f6648fc7d01059a04b8a3d2ce8092f1c0ce
4c5fd4ed6d7eda044f08d5369dd3ac130ae1e7d2f8415a77ebbc8010e2fe7c11
a56e9e3fc6d7b412b1e9cf5dff739358849779b3c80df268ade3d9da79bd5da5
19d1e63f8c47b32beeef9bf383b925f6414187330a48837c182a5770f67914d2
1f4ffbd0d8cf6b36bfde2890ad718d5c9178115e0e7b1f303b561475091e06e7
SH256 hash:
6912e4bedd1288f116e968f0a79d9797f6d6bd24d45a5f10c52e20f9d33b8c61
MD5 hash:
03bde4a82ad64c0f314985232fbca3fa
SHA1 hash:
e8d0b6339e94192eaaca32c812f914e60576dca6
Link:
https://www.unpac.me/results/a5b57fcd-ccd3-4644-b445-7b31af33a880/
SH256 hash:
4fd34ea618c595a8ddbb91277ba9879a5dededebf24221b9987d04d9dcdedb90
MD5 hash:
f8556ad11f144ea54f2ae2c46bfe54ec
SHA1 hash:
95e2070fc029e7bcefb8137174e6639bf638f2b5
Link:
https://www.unpac.me/results/a5b57fcd-ccd3-4644-b445-7b31af33a880/
SH256 hash:
c991bf983458f62d5c6fe6dd695b5d7e13a07a35228cd0b677afd6b6da6a5e1a
MD5 hash:
1769589c5e336e15b77de5cb960e1fd0
SHA1 hash:
27ac8143d42a6c42b64f6cab74800a6be0697d5b
Link:
https://www.unpac.me/results/a5b57fcd-ccd3-4644-b445-7b31af33a880/
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/c991bf983458f62d5c6fe6dd695b5d7e13a07a35228cd0b677afd6b6da6a5e1a

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

Executable exe c991bf983458f62d5c6fe6dd695b5d7e13a07a35228cd0b677afd6b6da6a5e1a

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/181525/

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