MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8c16a8412bd4bd33b6adc86308c8eaaf1eca8400c315d278a2e3bd14a8ac8a80. 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
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8c16a8412bd4bd33b6adc86308c8eaaf1eca8400c315d278a2e3bd14a8ac8a80
SHA3-384 hash: 0909c5f9794123dcdbeac25626794d188584965da0566ec086bc0fa8d7af03799655660bcabb22c4b39582b13d397a83
SHA1 hash: bcb1242b582a88e38db0ad2c0d346cbbccba6323
MD5 hash: 3d0179a3034f69152c86442eca65bfca
humanhash: alanine-double-connecticut-undress
File name:8c16a8412bd4bd33b6adc86308c8eaaf1eca8400c315d278a2e3bd14a8ac8a80
Download: download sample
Signature Formbook
Create hunting rule
File size:642'560 bytes
First seen:2025-03-10 11:52:19 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'853 x AgentTesla, 19'779 x Formbook, 12'303 x SnakeKeylogger)
ssdeep 12288:grgGnHPgPIvlgh2mv8UsSxzYTW8Iek8UPPdn/gSXnxaq1+:grP5vl60UsSxzYJk8GtH1
TLSH T1ABD401482A49D517C99257780B71F2B857BC6EDDA401E71B8ECEAEEFB976F004D04283
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
367
Origin country :
HU HU
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
8c16a8412bd4bd33b6adc86308c8eaaf1eca8400c315d278a2e3bd14a8ac8a80
Verdict:
No threats detected
Analysis date:
2025-03-10 15:34:15 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/0a4912a2-c8ea-419b-aefa-3dd19819623e

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67ceddf00d1b39e3a208b773
Tags:
malware
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
obfuscated packed packed packer_detected vbnet
Link:
https://www.filescan.io/uploads/67ced2ae4a3011c802cc2313/reports/b61497d6-1b01-415b-b9b1-4ffcf50f0bee/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/8c16a8412bd4bd33b6adc86308c8eaaf1eca8400c315d278a2e3bd14a8ac8a80
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/d08e8cee-071a-4f4e-a76e-ea0568cd7755
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1634706
Signature
.NET source code contains potential unpacker
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found direct / indirect Syscall (likely to bypass EDR)
Found malware configuration
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious 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 submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Uses netsh to modify the Windows network and firewall settings
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1634706 Sample: cp58zRLV7E.exe Startdate: 11/03/2025 Architecture: WINDOWS Score: 100 30 www.rowhesap.xyz 2->30 32 www.ynix.design 2->32 34 10 other IPs or domains 2->34 38 Found malware configuration 2->38 40 Malicious sample detected (through community Yara rule) 2->40 42 Antivirus detection for URL or domain 2->42 46 8 other signatures 2->46 11 cp58zRLV7E.exe 3 2->11         started        signatures3 44 Performs DNS queries to domains with low reputation 30->44 process4 file5 28 C:\Users\user\AppData\...\cp58zRLV7E.exe.log, ASCII 11->28 dropped 56 Tries to detect virtualization through RDTSC time measurements 11->56 58 Injects a PE file into a foreign processes 11->58 60 Switches to a custom stack to bypass stack traces 11->60 15 cp58zRLV7E.exe 11->15         started        signatures6 process7 signatures8 62 Modifies the context of a thread in another process (thread injection) 15->62 64 Maps a DLL or memory area into another process 15->64 66 Sample uses process hollowing technique 15->66 68 2 other signatures 15->68 18 explorer.exe 67 1 15->18 injected process9 signatures10 36 Uses netsh to modify the Windows network and firewall settings 18->36 21 netsh.exe 18->21         started        process11 signatures12 48 Modifies the context of a thread in another process (thread injection) 21->48 50 Maps a DLL or memory area into another process 21->50 52 Tries to detect virtualization through RDTSC time measurements 21->52 54 Switches to a custom stack to bypass stack traces 21->54 24 cmd.exe 1 21->24         started        process13 process14 26 conhost.exe 24->26         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/8c16a8412bd4bd33b6adc86308c8eaaf1eca8400c315d278a2e3bd14a8ac8a80
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/8c16a8412bd4bd33b6adc86308c8eaaf1eca8400c315d278a2e3bd14a8ac8a80/
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-02-25 08:10:45 UTC
File Type:
PE (.Net Exe)
Extracted files:
11
AV detection:
29 of 38 (76.32%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=rqlkqqjl2s6thnvnzbrqrshkv4pmvbaaymk5e6fc4o6rjkfmrkaa._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:da16 discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/250310-n2e7hatvhy/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/23cc0a89-ee2e-4a03-bcc9-81f093d44b4c
Unpacked files
SH256 hash:
8c16a8412bd4bd33b6adc86308c8eaaf1eca8400c315d278a2e3bd14a8ac8a80
MD5 hash:
3d0179a3034f69152c86442eca65bfca
SHA1 hash:
bcb1242b582a88e38db0ad2c0d346cbbccba6323
Link:
https://www.unpac.me/results/dd201dfa-3d8f-401a-9fb2-61b9565c0b6c/
SH256 hash:
e80a463e16b14b43e4112cb8f0cb0cf44ff245be592202042373a02b9ea4deb9
MD5 hash:
bbea1aafd0d7058f6f46c8ceff355f96
SHA1 hash:
14ca07073c0a943129823d6532358a55761a203f
Link:
https://www.unpac.me/results/dd201dfa-3d8f-401a-9fb2-61b9565c0b6c/
SH256 hash:
3aa608cdf732cf5a5f842a42d2617930aba54c2adb0d1c6f926cc2c1e0cf52ee
MD5 hash:
3781f4a7262814a311897bce0f09695d
SHA1 hash:
b1731feedd3a4000fb261f78f912c0e2a249f0ae
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/dd201dfa-3d8f-401a-9fb2-61b9565c0b6c/
SH256 hash:
caca58c402adff09bbc6907211050ce93ba1ca9de7e272d9d0f37f101e6fa340
MD5 hash:
3880b837a1470737da64d3b682136cb0
SHA1 hash:
7670a024e615341a0c1f9c38ba088781210167fb
Link:
https://www.unpac.me/results/dd201dfa-3d8f-401a-9fb2-61b9565c0b6c/
SH256 hash:
d07db88f879ea396c95ba1151aad315355637978893540a975d3356e81f7535d
MD5 hash:
f2bebbdeeed2531e1b23d91ae4e6f2d0
SHA1 hash:
a6c23616d0d1f650c4b78ad6bb92278e4a13f8ec
Detections:
win_formbook_w0
Create hunting rule
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
FormBook
Create hunting rule
Windows_Trojan_Formbook
Create hunting rule
Formbook
Create hunting rule
Link:
https://www.unpac.me/results/dd201dfa-3d8f-401a-9fb2-61b9565c0b6c/
Parent samples :
994e76088c89d90f9593d7615c985e385742c8a7fae22e3edbc321ce46d96442
460c4afbd1793aec32f2971ab2c08828200eb395b88ba1fe50d53ca51a021ec3
8c16a8412bd4bd33b6adc86308c8eaaf1eca8400c315d278a2e3bd14a8ac8a80
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/8c16a8412bd4/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.87
Link:
https://yomi.yoroi.company/submissions/8c16a8412bd4bd33b6adc86308c8eaaf1eca8400c315d278a2e3bd14a8ac8a80

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:AgentTesla_DIFF_Common_Strings_01
Create hunting rule
Author:schmidtsz
Description:Identify partial Agent Tesla strings
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

File information

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

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (HIGH_ENTROPY_VA)high

Comments