MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5b6a42756dca06a97d71a5ea64c1573d1445500fd0cfc16fba851b555908695c. 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: 17


Intelligence 17 IOCs YARA 5 File information Comments
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SHA256 hash: 5b6a42756dca06a97d71a5ea64c1573d1445500fd0cfc16fba851b555908695c
SHA3-384 hash: e7ffcd6dc7620d1bacc8316d27198caaac756330d184ae6906942727a806a14b7736433234ce34eb23a348522c9efc7b
SHA1 hash: d0a3039570316a32d388ce4da32e9dcbd16f9bc7
MD5 hash: af45d60b0d3abc1c7b3d5a887ae87c52
humanhash: autumn-mirror-salami-beryllium
File name:E-dekont.pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:526'351 bytes
First seen:2023-01-09 11:42:02 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 741 x AgentTesla, 427 x GuLoader)
ssdeep 12288:UY9s3sv7MkF8G54aut658LvNyYFPe+HExPFMQ:UY9scv7D8G5egiL7FPe+HcPFd
TLSH T157B42AA312E9BFC6E635C8B2E285FFE551207C1254E602CE99B093AAD8D1390FD7714D
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon e0c486868686c4e0 (1 x Formbook)
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
196
Origin country :
DE DE
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
E-dekont.pdf.exe
Verdict:
Malicious activity
Analysis date:
2023-01-09 11:44:45 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/cc993045-0494-4436-949a-708e05e0b8f3

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/351079/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a process from a recently created file
Launching a process
Сreating synchronization primitives
Launching cmd.exe command interpreter
Searching for synchronization primitives
Setting browser functions hooks
Unauthorized injection to a recently created process by context flags manipulation
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
No Threat
Threat level:
  10/10
Confidence:
100%
Tags:
overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/63bbfd900fdf1633326df18c/reports/6b562080-f969-454d-89f7-074416c28e21/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/dd8a99e7-9bc1-45d0-a82e-e6f66ec75f51
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1147930
Signature
C2 URLs / IPs found in malware configuration
Contains functionality to detect sleep reduction / modifications
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Initial sample is a PE file and has a suspicious name
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
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Uses an obfuscated file name to hide its real file extension (double extension)
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 780662 Sample: E-dekont.pdf.exe Startdate: 09/01/2023 Architecture: WINDOWS Score: 100 41 Malicious sample detected (through community Yara rule) 2->41 43 Multi AV Scanner detection for submitted file 2->43 45 Yara detected FormBook 2->45 47 4 other signatures 2->47 10 E-dekont.pdf.exe 19 2->10         started        process3 file4 29 C:\Users\user\AppData\Local\...\tcllxjnjc.exe, PE32 10->29 dropped 13 tcllxjnjc.exe 10->13         started        process5 signatures6 57 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 13->57 59 Maps a DLL or memory area into another process 13->59 61 Tries to detect virtualization through RDTSC time measurements 13->61 63 Contains functionality to detect sleep reduction / modifications 13->63 16 tcllxjnjc.exe 13->16         started        process7 signatures8 33 Modifies the context of a thread in another process (thread injection) 16->33 35 Maps a DLL or memory area into another process 16->35 37 Sample uses process hollowing technique 16->37 39 Queues an APC in another process (thread injection) 16->39 19 chkdsk.exe 16->19         started        22 explorer.exe 16->22 injected process9 dnsIp10 49 Modifies the context of a thread in another process (thread injection) 19->49 51 Maps a DLL or memory area into another process 19->51 53 Tries to detect virtualization through RDTSC time measurements 19->53 25 cmd.exe 1 19->25         started        31 www.grimoires.dev 22->31 55 System process connects to network (likely due to code injection or exploit) 22->55 signatures11 process12 process13 27 conhost.exe 25->27         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/5b6a42756dca06a97d71a5ea64c1573d1445500fd0cfc16fba851b555908695c/
Threat name:
Win32.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2023-01-09 10:26:37 UTC
File Type:
PE (Exe)
Extracted files:
3
AV detection:
22 of 26 (84.62%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=lnvee5lnzidks7lruxvgjqkxhukekuap2dh4c352qunvkwiinfoa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:b21g rat spyware stealer trojan
Link:
https://tria.ge/reports/230109-nt1hgaea65/
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
Enumerates physical storage devices
Suspicious use of SetThreadContext
Loads dropped DLL
Executes dropped EXE
Formbook payload
Formbook
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/19e35df6-6cf3-4c09-94f1-4a1c66343677
Unpacked files
SH256 hash:
4deef53f2b385de278a2dd0b554cedf346104b8486779d003d77d9232415c916
MD5 hash:
da97cc753e6eda2f3db20f16e9d876bf
SHA1 hash:
1fb9e83ed97ec39358add29095c3df773e314773
Detections:
FormBook
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/0cd4183f-741a-4b5e-8b76-cadefd34f737/
Parent samples :
03803da6cde700f85ca5df330c3fcbad16d590d4921a60cc831c5f636e20916a
be9c97f837293aea20541bc79acef3515ddffa81fb6e2306d9f0dcf26b63f7f5
ed2f75525575b5e42807ad0c42f3da38b75f84205eef6e4dffbd799fe0bb24e8
5b6a42756dca06a97d71a5ea64c1573d1445500fd0cfc16fba851b555908695c
62561bac40812897c76c0036a3bdb5c645e4de95e96caa0443e52d2b33d320e7
03315fc089295a2ff5733402c9a928e0fa0c26c3d67dd3610ea121845bde4f1f
SH256 hash:
4e576ff558eff0a84846e0b40812be30da51773b84bc730a285f596773e12deb
MD5 hash:
275321ec92c368d2e4819c534934d7a7
SHA1 hash:
03912abafd47319427c4084cbfbf8a050dde3062
Link:
https://www.unpac.me/results/0cd4183f-741a-4b5e-8b76-cadefd34f737/
SH256 hash:
5b6a42756dca06a97d71a5ea64c1573d1445500fd0cfc16fba851b555908695c
MD5 hash:
af45d60b0d3abc1c7b3d5a887ae87c52
SHA1 hash:
d0a3039570316a32d388ce4da32e9dcbd16f9bc7
Link:
https://www.unpac.me/results/0cd4183f-741a-4b5e-8b76-cadefd34f737/
Malware family:
XLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/5b6a42756dca/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/5b6a42756dca06a97d71a5ea64c1573d1445500fd0cfc16fba851b555908695c

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:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:Windows_Trojan_Formbook
Create hunting rule
Author:@malgamy12
Rule name:Windows_Trojan_Formbook_1112e116
Create hunting rule
Author:Elastic Security
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.formbook.

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

Formbook

Executable exe 5b6a42756dca06a97d71a5ea64c1573d1445500fd0cfc16fba851b555908695c

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/351079/

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