MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 41cbc855b5f9f98b5b15c3a88d712b64d6d99253950036e417448ea5955f2dc0. 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 13 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 41cbc855b5f9f98b5b15c3a88d712b64d6d99253950036e417448ea5955f2dc0
SHA3-384 hash: 5c1ed5e0ab49c6c54bb1ef4b548ab845606c04232a6580fe47c3ed8774b0497590c1d58057bb18b87369d074d4c91e95
SHA1 hash: 3c3f8129720e6cce15656c9a5762e9a5039fd3cc
MD5 hash: e9e2b3293056de8bec90c19a7ba1dd5b
humanhash: cold-music-michigan-hotel
File name:YG.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:287'232 bytes
First seen:2025-03-18 12:42:11 UTC
Last seen:2025-03-19 14:36:55 UTC
File type:Executable exe
MIME type:application/x-dosexec
ssdeep 6144:BBieb55xwer/EltwZt/uueFeyDEsT2x1qNUQT7fuQANFgsBqzdWQ:ietMY/EltwzR0ynEfJAjgZ
TLSH T13E5423A5BF42714EE455887130832148B8DAEB536939C7159EACA4D2F11A8B73F3173F
TrID 35.7% (.EXE) Win32 Executable (generic) (4504/4/1)
16.3% (.ICL) Windows Icons Library (generic) (2059/9)
16.1% (.EXE) OS/2 Executable (generic) (2029/13)
15.8% (.EXE) Generic Win/DOS Executable (2002/3)
15.8% (.EXE) DOS Executable Generic (2000/1)
Magika pebin
Reporter KatzenTech
Tags:176-65-144-3 exe FormBook

Intelligence

File Origin
# of uploads :
3
# of downloads :
463
Origin country :
RU RU
Vendor Threat Intelligence
Verdict:
Malicious
Score:
90.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67d979e008116ce4257229e9
Tags:
injection virus zpack
Result
Verdict:
Clean
Maliciousness:

Behaviour
Searching for the window
Сreating synchronization primitives
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
crypt microsoft_visual_cc overlay packed packed packer_detected
Link:
https://www.filescan.io/uploads/67d96a5f0a7899f3579bcf21/reports/aab6726a-a2e1-4ed8-8a34-83cc7cabdbfd/overview
Verdict:
Malicious
Labled as:
Mikey.Generic
Link:
https://www.hybrid-analysis.com/sample/41cbc855b5f9f98b5b15c3a88d712b64d6d99253950036e417448ea5955f2dc0
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/1ac2e020-049c-45db-806a-8c17f8ce64d5
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1641794
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Found direct / indirect Syscall (likely to bypass EDR)
Joe Sandbox ML detected suspicious sample
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 submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/41cbc855b5f9f98b5b15c3a88d712b64d6d99253950036e417448ea5955f2dc0
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/41cbc855b5f9f98b5b15c3a88d712b64d6d99253950036e417448ea5955f2dc0/
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-03-17 11:49:11 UTC
File Type:
PE (Exe)
AV detection:
27 of 36 (75.00%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ihf4qvnv7h4ywwyvyoui24jlmtlntestsuadnzaxishklfk7fxaa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
error
Formbook
Result
Malware family:
n/a
Score:
  3/10
Tags:
discovery
Link:
https://tria.ge/reports/250318-pxe7dawrw4/
Behaviour
Suspicious behavior: EnumeratesProcesses
System Location Discovery: System Language Discovery
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/120dab10-d1e6-412e-9719-cca1f42b2ac5
Unpacked files
SH256 hash:
41cbc855b5f9f98b5b15c3a88d712b64d6d99253950036e417448ea5955f2dc0
MD5 hash:
e9e2b3293056de8bec90c19a7ba1dd5b
SHA1 hash:
3c3f8129720e6cce15656c9a5762e9a5039fd3cc
Link:
https://www.unpac.me/results/3a3e184a-9511-4a61-8ae6-068371737ff6/
SH256 hash:
ba33986f7d7f2a78cc9ecad38e562af5d0a9020801d2471a33ff2a228f9f47f1
MD5 hash:
1116d241fa0a4b1d64157adce8240437
SHA1 hash:
6bc964afaa24535b57522cbeb005b5bd79a1f98e
Detections:
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/3a3e184a-9511-4a61-8ae6-068371737ff6/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/41cbc855b5f9/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/41cbc855b5f9f98b5b15c3a88d712b64d6d99253950036e417448ea5955f2dc0

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:DebuggerCheck__GlobalFlags
Create hunting rule
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
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: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: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: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

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