MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 401893d409c8453d7b0a4b7cd4ed000e61b32aa48a9e25a14f1d854fe0d86b7e. 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
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SHA256 hash: 401893d409c8453d7b0a4b7cd4ed000e61b32aa48a9e25a14f1d854fe0d86b7e
SHA3-384 hash: ef3fac9c834d966490e11b8618080a0fd3371cb530cd31da8e98788accb3c68bc7ec7f7c016b492ebf8e674f0f2ed47a
SHA1 hash: 483476c917bda46ba731185381de4f29faac8f19
MD5 hash: 24e80b6d9453ba443e456eac8cc211b5
humanhash: oranges-kilo-social-quebec
File name:Letter of approval.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'019'392 bytes
First seen:2022-09-07 07:37:06 UTC
Last seen:2022-09-07 13:20:40 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 12288:aPYZrC0unaz+H0DkfX+E2lR5KvjGCjIuHyjT3ATN4/f2DSB:IWCPnaz80kF2lRcgj+M
TLSH T183254C0F11C509A4C83651BCA4CCC5B34B6ADE50E637C959BFCA9CAFF592F2C46D22A4
TrID 64.2% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
11.5% (.SCR) Windows screen saver (13101/52/3)
9.2% (.EXE) Win64 Executable (generic) (10523/12/4)
5.7% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.9% (.EXE) Win32 Executable (generic) (4505/5/1)
Reporter JAMESWT_WT
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
200
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
Letter of approval.exe
Verdict:
Malicious activity
Analysis date:
2022-09-07 07:47:38 UTC
Tags:
formbook trojan stealer
Link:
https://app.any.run/tasks/1696f5b4-9584-48b7-99c1-66a66d1af868

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/308359/
Detection(s):
SecuriteInfo.com.Trojan.Inject4.42093.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a process with a hidden window
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
formbook packed
Link:
https://www.filescan.io/uploads/63184ad6d94ccae4108230b0/reports/a6d0ef5f-9615-451c-ba66-cd66ab00f617/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
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/84539b44-766d-4d3f-9756-ea9657fe1160
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1066159
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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)
Multi AV Scanner detection for dropped file
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
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 harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
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 dnsIp2 2 Behavior Graph ID: 698685 Sample: Letter of approval.exe Startdate: 07/09/2022 Architecture: WINDOWS Score: 100 39 www.bodywalkpass.com 2->39 47 Malicious sample detected (through community Yara rule) 2->47 49 Antivirus detection for URL or domain 2->49 51 Multi AV Scanner detection for dropped file 2->51 53 11 other signatures 2->53 9 Letter of approval.exe 7 2->9         started        signatures3 process4 file5 31 C:\Users\user\AppData\...\TBVkBYWBDDCE.exe, PE32 9->31 dropped 33 C:\Users\...\TBVkBYWBDDCE.exe:Zone.Identifier, ASCII 9->33 dropped 35 C:\Users\user\AppData\Local\...\tmpC308.tmp, XML 9->35 dropped 37 C:\Users\user\...\Letter of approval.exe.log, ASCII 9->37 dropped 59 Adds a directory exclusion to Windows Defender 9->59 61 Injects a PE file into a foreign processes 9->61 13 Letter of approval.exe 9->13         started        16 powershell.exe 25 9->16         started        18 schtasks.exe 1 9->18         started        signatures6 process7 signatures8 71 Modifies the context of a thread in another process (thread injection) 13->71 73 Maps a DLL or memory area into another process 13->73 75 Sample uses process hollowing technique 13->75 77 Queues an APC in another process (thread injection) 13->77 20 explorer.exe 13->20 injected 24 conhost.exe 16->24         started        26 conhost.exe 18->26         started        process9 dnsIp10 41 oplandtravels.com 160.119.252.7, 49760, 49761, 49762 xneeloZA South Africa 20->41 43 atama.engineering 81.169.145.80, 49719, 80 STRATOSTRATOAGDE Germany 20->43 45 13 other IPs or domains 20->45 55 System process connects to network (likely due to code injection or exploit) 20->55 57 Performs DNS queries to domains with low reputation 20->57 28 rundll32.exe 13 20->28         started        signatures11 process12 signatures13 63 Tries to steal Mail credentials (via file / registry access) 28->63 65 Tries to harvest and steal browser information (history, passwords, etc) 28->65 67 Modifies the context of a thread in another process (thread injection) 28->67 69 Maps a DLL or memory area into another process 28->69
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/401893d409c8453d7b0a4b7cd4ed000e61b32aa48a9e25a14f1d854fe0d86b7e/
Threat name:
ByteCode-MSIL.Trojan.FormBook
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Status:
Malicious
First seen:
2022-09-07 04:20:50 UTC
File Type:
PE (.Net Exe)
Extracted files:
20
AV detection:
23 of 26 (88.46%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=iamjhvajzbct26ykjn6nj3iabzq3gkverkpclikpdwcu7ygynn7a._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/220907-jgdqqabcg2/
Behaviour
Creates scheduled task(s)
Modifies Internet Explorer settings
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
Loads dropped DLL
Unpacked files
SH256 hash:
b967e139e14f1b3b63818188999029cef7fcb26c9b7bf32fbdd26d3bb1c6e783
MD5 hash:
e04e13bee2fcb789e3a69056a704b7fb
SHA1 hash:
a8a0401780f29376ee03d78cd56cb339438fa351
Detections:
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/6c6122a8-6e55-4506-a933-4ba254fc31d4/
SH256 hash:
968d0712c3f37655362a9e4583a1f38ac800ac9263c14b77aefd3b9f6834c8c3
MD5 hash:
b6d98dc8800f3a3f63931c95ddcd4859
SHA1 hash:
568d4b8cecc401fb2ca0c0439c69e2f7e36e8e27
Link:
https://www.unpac.me/results/6c6122a8-6e55-4506-a933-4ba254fc31d4/
SH256 hash:
8b533ffaed24e0351e489b14aaac6960b731db189ce7ed0c0c02d4a546af8e63
MD5 hash:
dbc7be56e6e32349315170599c8b333f
SHA1 hash:
d8e5840e3574b87d435e55a65ac648e040871aee
Link:
https://www.unpac.me/results/6c6122a8-6e55-4506-a933-4ba254fc31d4/
SH256 hash:
90497957294a73c00d0dcd9a7e4839fd995b7d2a28a7daa03e4b3e7b20805bbb
MD5 hash:
cae7e0638b27e0092505d366606ef1c7
SHA1 hash:
bb2cbeb7cca555acf4a25a8a364450296274f406
Link:
https://www.unpac.me/results/6c6122a8-6e55-4506-a933-4ba254fc31d4/
SH256 hash:
9b4aee132a0228378d66a57fda3a2030952309ef74cf2db724ac916b04d8c034
MD5 hash:
93c6391d23c1aa1ed66fb13f82f2ee31
SHA1 hash:
220098c3047c32b51ae13a5cc1e9beeef3da6e18
Link:
https://www.unpac.me/results/6c6122a8-6e55-4506-a933-4ba254fc31d4/
SH256 hash:
45f43100f326df8934cca348204681e4df22808e5fd86498c85e346f9f0038bc
MD5 hash:
06215a46e36407e85310db35e66e858f
SHA1 hash:
090b71552085419b7d0e11312bc1034d1bd57b28
Link:
https://www.unpac.me/results/6c6122a8-6e55-4506-a933-4ba254fc31d4/
SH256 hash:
401893d409c8453d7b0a4b7cd4ed000e61b32aa48a9e25a14f1d854fe0d86b7e
MD5 hash:
24e80b6d9453ba443e456eac8cc211b5
SHA1 hash:
483476c917bda46ba731185381de4f29faac8f19
Link:
https://www.unpac.me/results/6c6122a8-6e55-4506-a933-4ba254fc31d4/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/401893d409c8/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/401893d409c8453d7b0a4b7cd4ed000e61b32aa48a9e25a14f1d854fe0d86b7e

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
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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.

Cape
Cape
https://www.capesandbox.com/analysis/308359/

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