MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ac1bdadf98761eed39833d096c732ca61ede04535ecced46d1f662f9dab206f6. 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: 14


Intelligence 14 IOCs YARA 26 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ac1bdadf98761eed39833d096c732ca61ede04535ecced46d1f662f9dab206f6
SHA3-384 hash: 90561552c981a2b10f385de1e0641ad97c18cd0fec701790d85c311c7a543f22b34c5d6ffb1e1df23feb539e4424299a
SHA1 hash: c2ed4213f05d79a4ca60e47d3d5e5b704f21f192
MD5 hash: 89c7d489c3b4241830ec302a0eeee885
humanhash: pip-bulldog-pennsylvania-ceiling
File name:msedge_elf.dll
Download: download sample
Signature Formbook
Create hunting rule
File size:1'655'808 bytes
First seen:2025-12-15 17:01:51 UTC
Last seen:2025-12-15 17:59:35 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash 3f92cf5ec2191db2beed58d55041dd97 (2 x Formbook)
ssdeep 24576:e4FNUuk70xXPCtQNbdwjOu1cMKzThQJ8F6mSmZdluwCZqEMdPg7kSl4:e4FNUuNxZ3OcMKv2WFEWlrHELkSl4
Threatray 2'431 similar samples on MalwareBazaar
TLSH T1F175BE14E3D812B8D52BD774CA666232E6B0784A4371A5CF0B99C7192F73ED0AB7B311
TrID 66.6% (.EXE) InstallShield setup (43053/19/16)
16.2% (.EXE) Win64 Executable (generic) (10522/11/4)
7.7% (.EXE) Win16 NE executable (generic) (5038/12/1)
3.1% (.EXE) OS/2 Executable (generic) (2029/13)
3.0% (.EXE) Generic Win/DOS Executable (2002/3)
Magika pebin
Reporter threatcat_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
114
Origin country :
CH CH
Vendor Threat Intelligence
No detections
Malware family:
n/a
ID:
1
File name:
_ac1bdadf98761eed39833d096c732ca61ede04535ecced46d1f662f9dab206f6.dll
Verdict:
No threats detected
Analysis date:
2025-12-15 17:54:02 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/2bcf7dad-06d5-477a-8fd4-3d1d0ec54040

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/45115/
Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=69403f36cacd1005450d8274
Tags:
virus
Result
Verdict:
Clean
Maliciousness:
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
adaptive-context fingerprint masquerade microsoft_visual_cc packed
Link:
https://www.filescan.io/uploads/69403f1fa7163552ba00d770/reports/c8fca5d2-3264-44e4-9c5f-021dcfe105eb/overview
Verdict:
Malicious
Labled as:
Win64/Agent.ECK trojan
Link:
https://www.hybrid-analysis.com/sample/ac1bdadf98761eed39833d096c732ca61ede04535ecced46d1f662f9dab206f6
Verdict:
Malicious
File Type:
dll x64
First seen:
2025-12-15T12:43:00Z UTC
Last seen:
2025-12-17T15:32:00Z UTC
Hits:
~1000
Detections:
VHO:Backdoor.Win32.Androm.gen Trojan-Spy.Win32.Noon.sb Trojan-Spy.Noon.HTTP.ServerRequest Trojan.Win32.Injector.sb PDM:Trojan.Win32.Generic Backdoor.Agent.HTTP.C&C HEUR:Trojan.Win64.Generic VHO:Trojan.Win64.Agent.gen
Link:
https://opentip.kaspersky.com/ac1bdadf98761eed39833d096c732ca61ede04535ecced46d1f662f9dab206f6/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/e58d6639-0a91-4fb9-a0c9-183090f323df
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
88 / 100
Link:
https://www.joesandbox.com/analysis/1833188
Signature
Allocates memory in foreign processes
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Maps a DLL or memory area into another process
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Unusual module load detection (module proxying)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1833188 Sample: msedge_elf.dll.exe Startdate: 15/12/2025 Architecture: WINDOWS Score: 88 49 www.taxattorneyreno.com 2->49 53 Suricata IDS alerts for network traffic 2->53 55 Multi AV Scanner detection for submitted file 2->55 57 Yara detected FormBook 2->57 59 Joe Sandbox ML detected suspicious sample 2->59 11 loaddll64.exe 1 2->11         started        signatures3 process4 process5 13 rundll32.exe 11->13         started        16 cmd.exe 1 11->16         started        18 rundll32.exe 11->18         started        20 25 other processes 11->20 signatures6 73 Writes to foreign memory regions 13->73 75 Allocates memory in foreign processes 13->75 77 Injects a PE file into a foreign processes 13->77 22 ngen.exe 13->22         started        25 rundll32.exe 16->25         started        27 ngen.exe 18->27         started        29 ngen.exe 20->29         started        process7 signatures8 61 Maps a DLL or memory area into another process 22->61 63 Unusual module load detection (module proxying) 22->63 31 A2ChXjb2nkoJ.exe 22->31 injected 65 Writes to foreign memory regions 25->65 67 Allocates memory in foreign processes 25->67 69 Injects a PE file into a foreign processes 25->69 33 ngen.exe 25->33         started        36 CANIRdZsX1NJSw.exe 27->36 injected 38 S14TFGZWdZ.exe 29->38 injected process9 signatures10 40 msra.exe 31->40         started        51 Maps a DLL or memory area into another process 33->51 43 AsgSkHQBx.exe 33->43 injected 45 msra.exe 36->45         started        process11 signatures12 71 Unusual module load detection (module proxying) 40->71 47 msra.exe 43->47         started        process13
Score:
95%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/ac1bdadf98761eed39833d096c732ca61ede04535ecced46d1f662f9dab206f6
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable PE (Portable Executable) PE File Layout Win 64 Exe x64
Link:
https://app.malva.re/file/89c7d489c3b4241830ec302a0eeee885
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ac1bdadf98761eed39833d096c732ca61ede04535ecced46d1f662f9dab206f6/
Verdict:
Malicious
Threat:
VHO:Backdoor.Win32.Androm
Link:
https://tip.neiki.dev/file/ac1bdadf98761eed39833d096c732ca61ede04535ecced46d1f662f9dab206f6
Threat name:
Win64.Trojan.Generic
Create hunting rule
Status:
Suspicious
First seen:
2025-12-15 15:54:29 UTC
File Type:
PE+ (Dll)
AV detection:
10 of 38 (26.32%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=vqn5vx4yoypo2omdhuewy4zmuypn4bctl3go2rwr6zrptwvsa33a._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
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Formbook
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Formbook
867dc4d48c2fbef423c67cf481e33703e7e6a9494a400078298494777b23b18d
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8c9fd9ea38c16b4b38039c60d03c499aff67451f6fcd00d56abd4c81a6f2c3c2
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b09c80681d134a2d076c491793044e8865a34acfefbc86ac8b66e739a585c5e1
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c51c2bd39c3596fb16fdcb72835a6ae3aa4bcc255b1174516e90c1750f199dda
Formbook
dcde5a9fe61b7c32e735373629754ff429eadb1701165c4dcbe0ebd03374615e
Formbook
error
Formbook
+ 2'421 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  5/10
Tags:
n/a
Link:
https://tria.ge/reports/251215-vkazsafk9x/
Behaviour
Suspicious use of WriteProcessMemory
Program crash
Suspicious use of SetThreadContext
Verdict:
Unknown
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/a408bbcd-9ff6-4641-8499-a101bc93f259
Unpacked files
SH256 hash:
ac1bdadf98761eed39833d096c732ca61ede04535ecced46d1f662f9dab206f6
MD5 hash:
89c7d489c3b4241830ec302a0eeee885
SHA1 hash:
c2ed4213f05d79a4ca60e47d3d5e5b704f21f192
Link:
https://www.unpac.me/results/bbd815b6-9082-43e5-b9db-2678317b8099/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/ac1bdadf9876/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/ac1bdadf98761eed39833d096c732ca61ede04535ecced46d1f662f9dab206f6

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:CP_Script_Inject_Detector
Create hunting rule
Author:DiegoAnalytics
Description:Detects attempts to inject code into another process across PE, ELF, Mach-O binaries
Rule name:DebuggerCheck__API
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__MemoryWorkingSet
Create hunting rule
Author:Fernando Mercês
Description:Anti-debug process memory working set size check
Reference:http://www.gironsec.com/blog/2015/06/anti-debugger-trick-quicky/
Rule name:DebuggerCheck__QueryInfo
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:dgaagas
Create hunting rule
Author:Harshit
Description:Uses certutil.exe to download a file named test.txt
Rule name:golang_bin_JCorn_CSC846
Create hunting rule
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:SEH__vectored
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:SHA1_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for SHA1 constants
Rule name:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns
Rule name:ThreadControl__Context
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:TH_Win_ETW_Bypass_2025_CYFARE
Create hunting rule
Author:CYFARE
Description:Windows ETW Bypass Detection Rule - 2025
Reference:https://cyfare.net/

File information

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

Malspam

Formbook

Executable exe ac1bdadf98761eed39833d096c732ca61ede04535ecced46d1f662f9dab206f6

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/45115/

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