MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b0f1c4f3d4d3dda1a8c8ee81ecbde9a91fa3923058c13ac69dc572193252e0a2. 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 14 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b0f1c4f3d4d3dda1a8c8ee81ecbde9a91fa3923058c13ac69dc572193252e0a2
SHA3-384 hash: 2f706864cad69d8fbdabd8c6049ec7660f5832bd3fc8d7f456ce90fd82bf88d6b4eb281a82e5e38b7e4fa4119b905726
SHA1 hash: 6409a5dcd59c36fde2cddec428f22286bd4dc3b0
MD5 hash: 58c75c0c7af1046ac9db4f446765f213
humanhash: august-california-lithium-bakerloo
File name:attached PO.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:704'000 bytes
First seen:2025-01-22 13:40:25 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:AlLyWa+k0NoZzDHVZpPpEmRYlNqWQd62TMd5LfyuvGYec:Ok0WZfXkm8LQUbBN
TLSH T162E4CFD03F367319DEA86935E159DDBA96A11A78B001BAF369DC7B4332CC211AE0CF51
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
File icon (PE):PE icon
dhash icon 300e061616000000 (3 x Formbook, 3 x MassLogger, 2 x RedLineStealer)
Reporter threatcat_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
2'133
Origin country :
CH CH
Vendor Threat Intelligence
Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6790f82be708b6e7a3af97be
Tags:
stration shell spawn
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Сreating synchronization primitives
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a process with a hidden window
Creating a file in the %temp% directory
Launching a process
Creating a file
Launching cmd.exe command interpreter
Setting browser functions hooks
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
obfuscated obfuscated packed packed packer_detected vbnet
Link:
https://www.filescan.io/uploads/6790f56f20420d678c4023c9/reports/0e6a5ce4-a382-4456-8fd6-d1af95adb635/overview
Verdict:
Malicious
Labled as:
GrayWare[AdWare]/MSIL.Convagent
Link:
https://www.hybrid-analysis.com/sample/b0f1c4f3d4d3dda1a8c8ee81ecbde9a91fa3923058c13ac69dc572193252e0a2
Result
Verdict:
UNKNOWN
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/e4b07529-c174-4472-b482-39ea9c5c6daf
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1596788
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
AI detected suspicious sample
Allocates memory in foreign processes
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
Loading BitLocker PowerShell Module
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: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Scheduled temp file as task from temp location
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Tries to resolve many domain names, but no domain seems valid
Uses schtasks.exe or at.exe to add and modify task schedules
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1596788 Sample: attached PO.exe Startdate: 22/01/2025 Architecture: WINDOWS Score: 100 56 www.nipolatotocc8.xyz 2->56 58 www.emza.xyz 2->58 60 9 other IPs or domains 2->60 76 Suricata IDS alerts for network traffic 2->76 78 Found malware configuration 2->78 80 Malicious sample detected (through community Yara rule) 2->80 84 13 other signatures 2->84 11 attached PO.exe 7 2->11         started        15 ISQeEUZdvSY.exe 5 2->15         started        signatures3 82 Performs DNS queries to domains with low reputation 58->82 process4 file5 48 C:\Users\user\AppData\...\ISQeEUZdvSY.exe, PE32 11->48 dropped 50 C:\Users\...\ISQeEUZdvSY.exe:Zone.Identifier, ASCII 11->50 dropped 52 C:\Users\user\AppData\Local\...\tmp7F72.tmp, XML 11->52 dropped 54 C:\Users\user\AppData\...\attached PO.exe.log, ASCII 11->54 dropped 94 Writes to foreign memory regions 11->94 96 Allocates memory in foreign processes 11->96 98 Adds a directory exclusion to Windows Defender 11->98 17 RegSvcs.exe 11->17         started        20 powershell.exe 23 11->20         started        22 schtasks.exe 1 11->22         started        100 Multi AV Scanner detection for dropped file 15->100 102 Machine Learning detection for dropped file 15->102 104 Injects a PE file into a foreign processes 15->104 24 RegSvcs.exe 15->24         started        26 schtasks.exe 1 15->26         started        signatures6 process7 signatures8 64 Modifies the context of a thread in another process (thread injection) 17->64 66 Maps a DLL or memory area into another process 17->66 68 Sample uses process hollowing technique 17->68 74 2 other signatures 17->74 28 explorer.exe 52 1 17->28 injected 70 Loading BitLocker PowerShell Module 20->70 31 WmiPrvSE.exe 20->31         started        33 conhost.exe 20->33         started        35 conhost.exe 22->35         started        72 Found direct / indirect Syscall (likely to bypass EDR) 24->72 37 conhost.exe 26->37         started        process9 dnsIp10 62 www.emza.xyz 13.248.169.48, 50008, 80 AMAZON-02US United States 28->62 39 mstsc.exe 28->39         started        42 chkdsk.exe 28->42         started        process11 signatures12 86 Modifies the context of a thread in another process (thread injection) 39->86 88 Maps a DLL or memory area into another process 39->88 90 Tries to detect virtualization through RDTSC time measurements 39->90 92 Switches to a custom stack to bypass stack traces 39->92 44 cmd.exe 39->44         started        process13 process14 46 conhost.exe 44->46         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b0f1c4f3d4d3dda1a8c8ee81ecbde9a91fa3923058c13ac69dc572193252e0a2
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b0f1c4f3d4d3dda1a8c8ee81ecbde9a91fa3923058c13ac69dc572193252e0a2/
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-01-22 05:52:01 UTC
File Type:
PE (.Net Exe)
Extracted files:
12
AV detection:
20 of 37 (54.05%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wdy4j46u2po2dkgi52a6zppjvep2herqldatvru5yvzbsmss4cra._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:g10k discovery execution rat spyware stealer trojan
Link:
https://tria.ge/reports/250122-qy359symgw/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Formbook payload
Formbook
Formbook family
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/9e454449-a902-4924-99a1-407161f8e8d1
Unpacked files
SH256 hash:
7390aa25a4055ca0f593278289e7f055b234fe360d3377c9daa11d1b09dc60db
MD5 hash:
4b8b6855415a277760ba5588e8e7d714
SHA1 hash:
070b5c52d2491c2cc393e516bc4288125ee50207
Detections:
FormBook
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
win_formbook_w0
Create hunting rule
Windows_Trojan_Formbook
Create hunting rule
Formbook
Create hunting rule
Link:
https://www.unpac.me/results/80284f25-91af-4931-8d80-1e3883cb7220/
Parent samples :
b0f1c4f3d4d3dda1a8c8ee81ecbde9a91fa3923058c13ac69dc572193252e0a2
089e95b16d5f1acc07ddaf59d1edf60fd52ce6cd29f4bfa17377f4a68c383d12
662c96f27f4533d72e97b4cffe31be71d810dae4e6c1ac981060c38d3f627142
SH256 hash:
e9797a17db947cc519b764ad4e6348fa0df735696610459d14fe0beec0f0ea7e
MD5 hash:
501a4f210179f05d8757d370874d8e5b
SHA1 hash:
9b0da93322ac0f051e6d6733bfd8a4c84db921b0
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/80284f25-91af-4931-8d80-1e3883cb7220/
SH256 hash:
32e5e773177c3e5bd532020e1fbd0fd2a110752fb5eead5bc67926db44f04598
MD5 hash:
0a2a094b03f3eb7dbd0d7a4e660b1612
SHA1 hash:
57420f4e1178135e1f81d753b9ba641540559a36
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/80284f25-91af-4931-8d80-1e3883cb7220/
SH256 hash:
b0f1c4f3d4d3dda1a8c8ee81ecbde9a91fa3923058c13ac69dc572193252e0a2
MD5 hash:
58c75c0c7af1046ac9db4f446765f213
SHA1 hash:
6409a5dcd59c36fde2cddec428f22286bd4dc3b0
Link:
https://www.unpac.me/results/80284f25-91af-4931-8d80-1e3883cb7220/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b0f1c4f3d4d3/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/b0f1c4f3d4d3dda1a8c8ee81ecbde9a91fa3923058c13ac69dc572193252e0a2

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:NET
Create hunting rule
Author:malware-lu
Rule name:pe_imphash
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: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.

Malspam

Formbook

Executable exe b0f1c4f3d4d3dda1a8c8ee81ecbde9a91fa3923058c13ac69dc572193252e0a2

(this sample)

  
Delivery method
Distributed via e-mail attachment

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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