MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c81d428d0f138dd178ddcec9746770f54193734d11845031c8e5db5bec84fde3. 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: 15


Intelligence 15 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: c81d428d0f138dd178ddcec9746770f54193734d11845031c8e5db5bec84fde3
SHA3-384 hash: f05081e0028f15a4f1d41e15b3ca2506e8c093dd0e081677dbae702850c0054d772439cdbaab7d0e7aa395d6fc479a35
SHA1 hash: f64fc34379230ce5f3416246d2bcc14337704c64
MD5 hash: 37585d5542673c7a3de34207299ab5bd
humanhash: harry-don-blue-tennessee
File name:order specification requirement tex#2022.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'082'880 bytes
First seen:2022-04-11 08:55:02 UTC
Last seen:2022-04-11 09:49:14 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'748 x AgentTesla, 19'642 x Formbook, 12'245 x SnakeKeylogger)
ssdeep 24576:ibzWIpm+RR0B6oRPMFW/PElwmdiZHajjCVTS0rIcoVk:invRoRPEW/r9ZHegrIcoVk
Threatray 14'720 similar samples on MalwareBazaar
TLSH T1DB35E110F366D942D42D0BF389F3867607B2AD55D870C28E36EC761A4BB37932459B8B
File icon (PE):PE icon
dhash icon 74e4dc9cfcd4d4d4 (1 x Formbook, 1 x Renamer)
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
258
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
order specification requirement tex#2022.exe
Verdict:
Malicious activity
Analysis date:
2022-04-11 08:57:50 UTC
Tags:
formbook trojan stealer
Link:
https://app.any.run/tasks/56723cd6-5e9d-4ca0-9bc4-e0732d7bf067

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/262636/
Detection(s):
SecuriteInfo.com.Scr.Malcodegdn30.16307.31066.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Unauthorized injection to a recently created process
Creating a file
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
control.exe greyware obfuscated packed remote.exe replace.exe update.exe
Link:
https://www.filescan.io/uploads/6253ed27d149c40acb22e44b/reports/ef805597-8660-49a2-bbd4-5301c5e354f7/overview
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.
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/e92cd182-e96f-412f-969a-46e44e7ff683
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/974393
Signature
.NET source code contains potential unpacker
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)
Modifies the prolog of user mode functions (user mode inline hooks)
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
Uses ipconfig to lookup or modify the Windows network settings
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 606879 Sample: order specification require... Startdate: 11/04/2022 Architecture: WINDOWS Score: 100 37 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->37 39 Found malware configuration 2->39 41 Malicious sample detected (through community Yara rule) 2->41 43 9 other signatures 2->43 10 order specification requirement tex#2022.exe 3 2->10         started        process3 signatures4 53 Injects a PE file into a foreign processes 10->53 13 order specification requirement tex#2022.exe 10->13         started        process5 signatures6 55 Modifies the context of a thread in another process (thread injection) 13->55 57 Maps a DLL or memory area into another process 13->57 59 Sample uses process hollowing technique 13->59 61 Queues an APC in another process (thread injection) 13->61 16 explorer.exe 3 13->16 injected process7 dnsIp8 27 www.prettiuniversity.com 16->27 29 www.morningdrink.coffee 16->29 31 2 other IPs or domains 16->31 33 System process connects to network (likely due to code injection or exploit) 16->33 35 Uses ipconfig to lookup or modify the Windows network settings 16->35 20 ipconfig.exe 16->20         started        signatures9 process10 signatures11 45 Self deletion via cmd delete 20->45 47 Modifies the context of a thread in another process (thread injection) 20->47 49 Maps a DLL or memory area into another process 20->49 51 Tries to detect virtualization through RDTSC time measurements 20->51 23 cmd.exe 1 20->23         started        process12 process13 25 conhost.exe 23->25         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c81d428d0f138dd178ddcec9746770f54193734d11845031c8e5db5bec84fde3/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-04-11 08:56:09 UTC
File Type:
PE (.Net Exe)
Extracted files:
31
AV detection:
16 of 26 (61.54%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=zaoufdipcog5c6g5z3exiz3q6vazg42ncgcfamoi4xnvx3ee7xrq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
156b5c448e30912d7d21ca87fbb01a5c9006a3093c236e05809a4b4ecacd7400
Formbook
4a7aa26a59cccaa38181f61e413214368bd2cb3b8aa9c93c8694cc7d37591a3f
Formbook
4fd44b1855341a3f6f31e08e4ad288747ecb8e5b8637b95fff99aa689de07446
Formbook
613151db2677d34450d7a67d1a78a167f3d5dade8afc2cc4e8309336857bb766
Formbook
6bd24ce0a16599d97686146c6a822023f0f4896fcee914eed9a4e45a7e46b864
Formbook
8c7c6966c40ca10cdb43c9520c24ae932e63429fbc858b2c05f94f1bedbe0efa
Formbook
8c8afc7e873c1fc04cfc9cc2331ed6f46dad4defd1158e39f10258ee4b477758
Formbook
b0f1a1bfefa0359f8ef181219a761192e70a2d8ec0dd07692ffe24814f50c11d
Formbook
cbf7dac8ee4dd46d48f7a0d6f0495d3d27ef5319fd05ace04aea7bfe96fe99c7
Formbook
+ 14'710 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:sn83 rat spyware stealer trojan
Link:
https://tria.ge/reports/220411-kvgvzafgd2/
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
Program crash
Suspicious use of SetThreadContext
Formbook Payload
Formbook
Unpacked files
SH256 hash:
ea4af56e25cfef5f2a4a4a85a303a353cdedb9f5b9f74675f671fd93958679c7
MD5 hash:
699244c91446143bcc9b0b13de2793ab
SHA1 hash:
c63b607fe4ad755a03e82e9de7d30046782a1d2e
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/bd52586b-8144-4d0e-93f0-855befc77c64/
Parent samples :
b0f1a1bfefa0359f8ef181219a761192e70a2d8ec0dd07692ffe24814f50c11d
c81d428d0f138dd178ddcec9746770f54193734d11845031c8e5db5bec84fde3
SH256 hash:
007694272e71c5aa5e99bee9e6f9a48bd591a5f1d84f7e4d82b86d32570815b0
MD5 hash:
df10f342c5a36206cae9c53f0fbda9dd
SHA1 hash:
fc0e8645a7ed3fe8eb6a6ec45e34753baa2b1461
Link:
https://www.unpac.me/results/bd52586b-8144-4d0e-93f0-855befc77c64/
SH256 hash:
48e901e7b69272d2cb63c25b194d37212c8afbedb45ab6ab8f6a24b21cf53cd9
MD5 hash:
8bcfe8d100b7282ddd51fea7242fb7c8
SHA1 hash:
4fa813042627fdb82d5ddadebc1d165d7c35dbac
Link:
https://www.unpac.me/results/bd52586b-8144-4d0e-93f0-855befc77c64/
SH256 hash:
d20e7628a1f8934a2fc03947f4131834d03b447b6c41191a2aa08a01e722cdf5
MD5 hash:
2a5d3ea7a887983fa2ec09c4c1afc28c
SHA1 hash:
2a11fc7080f8afc79b68012ad68a4e72d2fba7d8
Link:
https://www.unpac.me/results/bd52586b-8144-4d0e-93f0-855befc77c64/
SH256 hash:
c81d428d0f138dd178ddcec9746770f54193734d11845031c8e5db5bec84fde3
MD5 hash:
37585d5542673c7a3de34207299ab5bd
SHA1 hash:
f64fc34379230ce5f3416246d2bcc14337704c64
Link:
https://www.unpac.me/results/bd52586b-8144-4d0e-93f0-855befc77c64/
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/c81d428d0f138dd178ddcec9746770f54193734d11845031c8e5db5bec84fde3

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:BitcoinAddress
Create hunting rule
Author:Didier Stevens (@DidierStevens)
Description:Contains a valid Bitcoin address
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 c81d428d0f138dd178ddcec9746770f54193734d11845031c8e5db5bec84fde3

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/262636/

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