MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 21819dfbcb4f450bc55706acc971444f6f3452604dc0c19a0b04f2e21732987b. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 21819dfbcb4f450bc55706acc971444f6f3452604dc0c19a0b04f2e21732987b
SHA3-384 hash: 726ece8eb2f1481e30fe6f44fa9112e48d1fbff9970f4303f4563caaec56ddeb017bb5a2dd73fe69562beeea87f51022
SHA1 hash: becaf95d431c35b3ad8cbd480f230a4b2323bb86
MD5 hash: 12fa35cef108edde1ebfe01d69c1186b
humanhash: aspen-minnesota-salami-tango
File name:ZYJY-2021010005.RXHT0021 秘鲁箱单.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:867'328 bytes
First seen:2021-08-06 06:30:47 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'660 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:sul/f9pg3s8XqvlQXjMN6wfHQOovMacUVtM7g3Hwe1jAt2NjFZOlJl:sgjq0QTMN6woOpaVKg3pjAMNj2
Threatray 7'741 similar samples on MalwareBazaar
TLSH T11A05CF90E585AA06C588297F1F3DF67053FC9D8B1556C0812DD8EE173BAEEFA09835C2
dhash icon f0d88d061bd2d0f0 (8 x AgentTesla, 7 x Formbook, 3 x SnakeKeylogger)
Reporter cocaman
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
342
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
ZYJY-2021010005.RXHT0021 秘鲁箱单.exe
Verdict:
Suspicious activity
Analysis date:
2021-08-06 06:33:12 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/4fe74368-09f1-4fad-9f46-55bd6dcfce53

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Launching the default Windows debugger (dwwin.exe)
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/e4467206-aa65-4ced-a944-af2bbc9d6dda
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/828115
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found malware configuration
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)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
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 signatures2 2 Behavior Graph ID: 460545 Sample: ZYJY-2021010005.RXHT0021 #U... Startdate: 06/08/2021 Architecture: WINDOWS Score: 100 34 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->34 36 Found malware configuration 2->36 38 Malicious sample detected (through community Yara rule) 2->38 40 6 other signatures 2->40 10 ZYJY-2021010005.RXHT0021 #U79d8#U9c81#U7bb1#U5355.exe 3 2->10         started        process3 process4 12 ZYJY-2021010005.RXHT0021 #U79d8#U9c81#U7bb1#U5355.exe 10->12         started        signatures5 48 Modifies the context of a thread in another process (thread injection) 12->48 50 Maps a DLL or memory area into another process 12->50 52 Sample uses process hollowing technique 12->52 54 Queues an APC in another process (thread injection) 12->54 15 explorer.exe 12->15 injected process6 dnsIp7 26 www.curtisbigelow.net 199.34.228.159, 49730, 80 WEEBLYUS United States 15->26 28 www.mapopi.com 185.107.56.192, 49729, 80 NFORCENL Netherlands 15->28 30 10 other IPs or domains 15->30 32 System process connects to network (likely due to code injection or exploit) 15->32 19 systray.exe 15->19         started        signatures8 process9 signatures10 42 Modifies the context of a thread in another process (thread injection) 19->42 44 Maps a DLL or memory area into another process 19->44 46 Tries to detect virtualization through RDTSC time measurements 19->46 22 cmd.exe 1 19->22         started        process11 process12 24 conhost.exe 22->24         started       
Detection:
xloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/21819dfbcb4f450bc55706acc971444f6f3452604dc0c19a0b04f2e21732987b/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-08-06 05:22:05 UTC
File Type:
PE (.Net Exe)
Extracted files:
28
AV detection:
15 of 28 (53.57%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=egaz366lj5cqxrkxa2wms4kej5xtiutajxamdgqlatzoefzstb5q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
4c1b38391ab198fb0e2c7050a8951e65efbc818991fb710f6deeb2c76a54c734
Formbook
5023ffb96d6d21805c48f275dbb208a1671ab8dd7f3c170ca4dba1ac08c075f9
Formbook
5397f0168be76c7e5efee936d341eb359b9015af5e77631129dc0664105e9259
Formbook
cbe7c0318d2f88aff2f18fc19a824bfdebcf2f7137d85adac1a5799afbb6876b
Formbook
dd4114ea355d3f70e7683fb8491e2499347b6133bd9ef6d094a0cb6ad8aa4609
Formbook
ee929bc954e0c858ca17de372ed70ec02343b1c48ab6631c07c60550a8da7b4d
Formbook
eebf2b5d558c3f39f52538f7d3175c732f38351dca734eb37bf975796dcc086a
Formbook
+ 7'731 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  3/10
Tags:
n/a
Link:
https://tria.ge/reports/210806-74g71nwg3s/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Program crash
Unpacked files
SH256 hash:
f983da48ac2fd562b4a60f65633c6d5783e1779df39ce325b5e1c86e4030cc75
MD5 hash:
1e2eda83043bcf638d404c49e1a88b00
SHA1 hash:
e91f775f6d57d0ccb81e54cdf77a304d3684a153
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/23ed4a85-6d35-458a-a72f-ac669ab5047c/
Parent samples :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 hash:
aed00f82f1772e5a403cce9c1349202c8371e67ed9ef19a33cac0bf2a411f3c1
MD5 hash:
c273f926e2a29bd62cc8f27b569a0b2a
SHA1 hash:
e08d302cab3e11d776599a6b0537207fce6f9c51
Link:
https://www.unpac.me/results/23ed4a85-6d35-458a-a72f-ac669ab5047c/
SH256 hash:
617707c2408938f3eb8983d74124a37717a389a46b2860c2ecfb11bf2d2ab35d
MD5 hash:
a706fde930df8076f522ada7a2593307
SHA1 hash:
d70ae2716fc9da551fa71812090227a02662a2dc
Link:
https://www.unpac.me/results/23ed4a85-6d35-458a-a72f-ac669ab5047c/
SH256 hash:
21819dfbcb4f450bc55706acc971444f6f3452604dc0c19a0b04f2e21732987b
MD5 hash:
12fa35cef108edde1ebfe01d69c1186b
SHA1 hash:
becaf95d431c35b3ad8cbd480f230a4b2323bb86
Link:
https://www.unpac.me/results/23ed4a85-6d35-458a-a72f-ac669ab5047c/
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/21819dfbcb4f450bc55706acc971444f6f3452604dc0c19a0b04f2e21732987b

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

rar 5a1642e79f3f7bf0d687a25b53588048a9ebaed6a7237a6f7dce35947e3063e0

Formbook

Executable exe 21819dfbcb4f450bc55706acc971444f6f3452604dc0c19a0b04f2e21732987b

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 5a1642e79f3f7bf0d687a25b53588048a9ebaed6a7237a6f7dce35947e3063e0

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