MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1. 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: 10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1
SHA3-384 hash: f81fb5757b0bd4d37c493df89cec3270e74f3e7a46e7bedd59f2c2def6877166017b0166d289d25b8f1a548de8500a67
SHA1 hash: eb73f950397f919df73442f66cbd15deee931cea
MD5 hash: 92e6f05295ae825d4f3d9982a616b98e
humanhash: vermont-helium-robert-two
File name:Invoice-Pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:663'040 bytes
First seen:2022-10-24 00:01:39 UTC
Last seen:Never
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:rYK4r6syCKHtudgQcEfCUkNNvshJGxnLeFnQ:rYK4RNKCcg1knvsh45LeFnQ
Threatray 17'024 similar samples on MalwareBazaar
TLSH T195E4222E57DF5EB8C57E0BB9F120681D0372D1DAB101FBAB058B69E40F223D884956DB
TrID 61.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
11.0% (.SCR) Windows screen saver (13101/52/3)
8.8% (.EXE) Win64 Executable (generic) (10523/12/4)
5.5% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.2% (.EXE) Win16 NE executable (generic) (5038/12/1)
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
249
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
Invoice-Pdf.exe
Verdict:
Malicious activity
Analysis date:
2022-10-24 00:04:45 UTC
Tags:
formbook trojan stealer
Link:
https://app.any.run/tasks/f872b927-bb6d-4e97-88f0-02b4d7393895

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/323126/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.1636.13057.1065.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Сreating synchronization primitives
Creating a process from a recently created file
Creating a process with a hidden window
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a system process
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/d768c673-f678-4a8d-b77c-4a018f0be0ab
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1096100
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
C2 URLs / IPs found in 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 dropped file
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 dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Scheduled temp file as task from temp location
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 schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 728741 Sample: Invoice-Pdf.exe Startdate: 24/10/2022 Architecture: WINDOWS Score: 100 66 Malicious sample detected (through community Yara rule) 2->66 68 Sigma detected: Scheduled temp file as task from temp location 2->68 70 Multi AV Scanner detection for submitted file 2->70 72 8 other signatures 2->72 10 Invoice-Pdf.exe 7 2->10         started        14 AcsxnldqTkS.exe 5 2->14         started        process3 file4 46 C:\Users\user\AppData\...\AcsxnldqTkS.exe, PE32 10->46 dropped 48 C:\Users\...\AcsxnldqTkS.exe:Zone.Identifier, ASCII 10->48 dropped 50 C:\Users\user\AppData\Local\...\tmp3339.tmp, XML 10->50 dropped 52 C:\Users\user\AppData\...\Invoice-Pdf.exe.log, ASCII 10->52 dropped 80 Uses schtasks.exe or at.exe to add and modify task schedules 10->80 82 Adds a directory exclusion to Windows Defender 10->82 84 Tries to detect virtualization through RDTSC time measurements 10->84 16 Invoice-Pdf.exe 10->16         started        19 powershell.exe 21 10->19         started        21 schtasks.exe 1 10->21         started        86 Multi AV Scanner detection for dropped file 14->86 88 Machine Learning detection for dropped file 14->88 90 Injects a PE file into a foreign processes 14->90 23 AcsxnldqTkS.exe 14->23         started        25 schtasks.exe 1 14->25         started        signatures5 process6 signatures7 58 Modifies the context of a thread in another process (thread injection) 16->58 60 Maps a DLL or memory area into another process 16->60 62 Sample uses process hollowing technique 16->62 64 Queues an APC in another process (thread injection) 16->64 27 explorer.exe 16->27 injected 31 conhost.exe 19->31         started        33 conhost.exe 21->33         started        35 conhost.exe 25->35         started        process8 dnsIp9 54 www.skylanai.com 27->54 56 skylanai.com 34.102.136.180, 49699, 80 GOOGLEUS United States 27->56 92 System process connects to network (likely due to code injection or exploit) 27->92 37 systray.exe 27->37         started        40 systray.exe 27->40         started        signatures10 process11 signatures12 74 Modifies the context of a thread in another process (thread injection) 37->74 76 Maps a DLL or memory area into another process 37->76 78 Tries to detect virtualization through RDTSC time measurements 37->78 42 cmd.exe 1 37->42         started        process13 process14 44 conhost.exe 42->44         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1/
Threat name:
ByteCode-MSIL.Trojan.Zilla
Create hunting rule
Status:
Malicious
First seen:
2022-10-22 01:02:58 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
24 of 42 (57.14%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=cb2ypcokq5ozpa5itchawdn73chxljvmb22ujnntojausird7xiq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
1a7c17fe2bfef24320b153fe3440489d3797d624ec0bb78c3e383784debcecec
Formbook
2fcc629586efc9cb1a3f5773f8b2908743e3c7aa76f0597871b6ea8e0cfab9c3
Formbook
7845453819c89f24416bfa15744e3625fafb7544d5beb180f6fe02a4d639b227
Formbook
9ce6edfb072d05faec9d72731fc1ed955348a0a86e44eb9511eb215045861845
Formbook
cc5d301b7f301c29f99b304c7768abd2abbfbdd1e3af977b16de6cac6fe5a4b4
Formbook
d5b506a06cd81e98b0ac084d04cf2eeb448dac247c0fe6570f5986c4dffd9554
Formbook
f1d6dee5489870d7cc620521cce6009b2fc0d4cada1ec66a979ef53faf6c1fd9
Formbook
fc3b3317c4877d207407aad03ab5af9c0fbd4ea5e71353139eef0af9ab013c91
Formbook
+ 17'014 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:a20e rat spyware stealer trojan
Link:
https://tria.ge/reports/221024-abf48adde6/
Behaviour
Creates scheduled task(s)
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
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Deletes itself
Formbook payload
Formbook
Unpacked files
SH256 hash:
401d37bb542e818ee49038c652fa9d769d216b912fbf638b768d2370cd184854
MD5 hash:
705e49ed906ae2317fb8f126f2ab2f4b
SHA1 hash:
33996978fe870cb59c5bf620bf4c38415ffe1e37
Detections:
FormBook
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/0638dc1a-fc4c-403b-a63c-e6b44d1dccfe/
Parent samples :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 hash:
5413d47b8cdc5de65a5bfe970c4ec8d2d65b19e57399ef7d9757d36603acd26d
MD5 hash:
1ca86ab7e61dac5f7775ee94bd1c882e
SHA1 hash:
b15cc5fceac284c3977efe70e40a04f8dec9d483
Link:
https://www.unpac.me/results/0638dc1a-fc4c-403b-a63c-e6b44d1dccfe/
SH256 hash:
2ee5ca5866999f9b4a11ecf6a4e9abb88b7c5da9d0ecb3c97275c0f9bab09f65
MD5 hash:
fb226c0e0497ac8a2fb2f7667324c35d
SHA1 hash:
77dcd97a168d2112754e698fca1beee55d2d4715
Link:
https://www.unpac.me/results/0638dc1a-fc4c-403b-a63c-e6b44d1dccfe/
SH256 hash:
678d527fc01a0eaa1be366ca97b0ad5a3fe890b1ef8267d2fc981ff43c4d08e5
MD5 hash:
2da433d67db4775d8f02a8fed4b31bf3
SHA1 hash:
235fe8f2076f3b5cfffacc574825550cee8e61e9
Link:
https://www.unpac.me/results/0638dc1a-fc4c-403b-a63c-e6b44d1dccfe/
SH256 hash:
3cc36dd6375cafe5db1782fcc07ea8dd512ade80d5d88786c7e3a7f6fedcf682
MD5 hash:
4e09f774b8efa3c84252a9cb4e88a093
SHA1 hash:
10256e371820c4d97011053ae44878e84da7936e
Link:
https://www.unpac.me/results/0638dc1a-fc4c-403b-a63c-e6b44d1dccfe/
SH256 hash:
10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1
MD5 hash:
92e6f05295ae825d4f3d9982a616b98e
SHA1 hash:
eb73f950397f919df73442f66cbd15deee931cea
Link:
https://www.unpac.me/results/0638dc1a-fc4c-403b-a63c-e6b44d1dccfe/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/10758789ca87/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1

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:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
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 10758789ca875d9783a8988e0b0dbfd88f75a6ac0eb544b5b37241492223fdd1

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/323126/

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