MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 31b78f85d2a1aa72f3ec47187d3ef589375825c0c3a4434649f874f3c7cb8cfd. 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 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 31b78f85d2a1aa72f3ec47187d3ef589375825c0c3a4434649f874f3c7cb8cfd
SHA3-384 hash: db7f9fdb1b8677bedc61a44d9393c1e6098c8c0fdf72ad43619ae21a08f6687de2f9d5ad66928a369a10cc109413255b
SHA1 hash: 05946ede8cf54d3e7141e793d49fb285cf7e93fb
MD5 hash: 9e63e5a68ef5a0d71810e71ab0ccfd38
humanhash: coffee-magazine-uranus-football
File name:UB BO 14-3-2025.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:847'360 bytes
First seen:2025-03-14 19:44:48 UTC
Last seen:2025-03-14 21:18:11 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'658 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:WqL/OIAAnPZHc1Tej6K6oHv9Q5y2SXb3fj0lLBnyLD6QhwKcCoUMG+7ni/Ysszxh:W84Aka6oHlYy2Sv0k6QiKcY+9El/K
Threatray 30 similar samples on MalwareBazaar
TLSH T1D705022E7E86EE46CB1D5D3BC413904C42A9CD86FDA3F36615CE1CFB6D32A44A44E942
TrID 69.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.0% (.EXE) Win64 Executable (generic) (10522/11/4)
6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.2% (.EXE) Win32 Executable (generic) (4504/4/1)
1.9% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Magika pebin
dhash icon e0e4e0e8e8e8e868 (4 x Formbook, 3 x SnakeKeylogger, 1 x MassLogger)
Reporter threatcat_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
3
# of downloads :
466
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
UB BO 14-3-2025.exe
Verdict:
No threats detected
Analysis date:
2025-03-14 19:46:57 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/a2316f37-1d9f-4511-b7ab-31b6143614cf

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67d4967708116ce4257132f9
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:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated obfuscated packed packed packer_detected
Link:
https://www.filescan.io/uploads/67d4874b01edd28374b0265a/reports/34acc822-7017-4fcc-b772-39a5fabe24dd/overview
Verdict:
Malicious
Labled as:
HackTool[Obfuscator]/MSIL.DeepSea
Link:
https://www.hybrid-analysis.com/sample/31b78f85d2a1aa72f3ec47187d3ef589375825c0c3a4434649f874f3c7cb8cfd
Result
Verdict:
SUSPICIOUS
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:
Agent Tesla
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/344d55a7-b26f-4d1b-846b-4a0e43a4b90a
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1638841
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
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 AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1638841 Sample: UB BO 14-3-2025.exe Startdate: 14/03/2025 Architecture: WINDOWS Score: 100 30 www.tether1.xyz 2->30 32 www.bawiin.xyz 2->32 34 15 other IPs or domains 2->34 44 Suricata IDS alerts for network traffic 2->44 46 Antivirus detection for URL or domain 2->46 48 Antivirus / Scanner detection for submitted sample 2->48 52 6 other signatures 2->52 10 UB BO 14-3-2025.exe 3 2->10         started        signatures3 50 Performs DNS queries to domains with low reputation 32->50 process4 file5 28 C:\Users\user\...\UB BO 14-3-2025.exe.log, ASCII 10->28 dropped 13 UB BO 14-3-2025.exe 10->13         started        process6 signatures7 64 Maps a DLL or memory area into another process 13->64 16 wN0oVYUN02oHqTQE.exe 13->16 injected process8 signatures9 42 Found direct / indirect Syscall (likely to bypass EDR) 16->42 19 dxdiag.exe 13 16->19         started        process10 signatures11 54 Tries to steal Mail credentials (via file / registry access) 19->54 56 Tries to harvest and steal browser information (history, passwords, etc) 19->56 58 Modifies the context of a thread in another process (thread injection) 19->58 60 3 other signatures 19->60 22 wN0oVYUN02oHqTQE.exe 19->22 injected 26 firefox.exe 19->26         started        process12 dnsIp13 36 www.10134.app 107.148.6.145, 49753, 49754, 49755 PEGTECHINCUS United States 22->36 38 www.thriay.website 209.74.77.230, 49745, 49746, 49747 MULTIBAND-NEWHOPEUS United States 22->38 40 5 other IPs or domains 22->40 62 Found direct / indirect Syscall (likely to bypass EDR) 22->62 signatures14
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/31b78f85d2a1aa72f3ec47187d3ef589375825c0c3a4434649f874f3c7cb8cfd
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/31b78f85d2a1aa72f3ec47187d3ef589375825c0c3a4434649f874f3c7cb8cfd/
Threat name:
Win32.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2025-03-14 15:29:39 UTC
File Type:
PE (.Net Exe)
Extracted files:
2
AV detection:
23 of 38 (60.53%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=gg3y7bosugvhf47mi4mh2pxvre3vqjoayosegrsj7b2phr6lrt6q._file
Verdict:
malicious
Label(s):
unc_loader_037
Create hunting rule
formbook
Create hunting rule
Similar samples:
31b78f85d2a1aa72f3ec47187d3ef589375825c0c3a4434649f874f3c7cb8cfd
Formbook
730dcaa50239c82c3d920f812bcad23a638a09c783479097291f8a6d9bca07a7
Formbook
e995625ce21ffd58435c425d4350f614f8126d4fc9e48459eef83b70cc58da53
Formbook
error
Formbook
+ 20 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  5/10
Tags:
discovery
Link:
https://tria.ge/reports/250314-ygd4taxygx/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Verdict:
Malicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/cdd325ee-30bf-4c8d-9ee5-14c7acd91957
Unpacked files
SH256 hash:
31b78f85d2a1aa72f3ec47187d3ef589375825c0c3a4434649f874f3c7cb8cfd
MD5 hash:
9e63e5a68ef5a0d71810e71ab0ccfd38
SHA1 hash:
05946ede8cf54d3e7141e793d49fb285cf7e93fb
Link:
https://www.unpac.me/results/4738f62f-be7e-4d60-ba9e-38a970622cdd/
SH256 hash:
094a2002272a6a5c1a719550f4ce12f25f397689796f090ad26991cf60698c46
MD5 hash:
a92790e0ffd6d83c3e036197e9eb7092
SHA1 hash:
192c8ab285101b240de22931e4fc96907f134c99
Link:
https://www.unpac.me/results/4738f62f-be7e-4d60-ba9e-38a970622cdd/
SH256 hash:
d74ab49f7967f3413bd06a82cf48d48b728ec0e2619935bd047f47ea43e3b921
MD5 hash:
4eb07d10909ed30b701a8240959dc092
SHA1 hash:
34379d0b0d502082916830c135945296d5d76828
Detections:
INDICATOR_EXE_Packed_SmartAssembly
Create hunting rule
Link:
https://www.unpac.me/results/4738f62f-be7e-4d60-ba9e-38a970622cdd/
Parent samples :
31b78f85d2a1aa72f3ec47187d3ef589375825c0c3a4434649f874f3c7cb8cfd
aff6ad8311ac50a6bf8f23b5c3cdaa7e1e0f3308e505df6f65ae71bbd3a7c1f2
SH256 hash:
2be4adb0fe7c09dbdd0b37ac3f71b8c9dda0c2d5bf6b24da5477ea6d4e07b829
MD5 hash:
8cd8a32aab1cf0382a05dc28cca91cf0
SHA1 hash:
929d872dc290cc71976e69e12ff98274cdf63794
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/4738f62f-be7e-4d60-ba9e-38a970622cdd/
SH256 hash:
f63f2fe6eac6dc795e05f3409a5e569bc0e752e2880930960d6f4bbea7a35766
MD5 hash:
15ec220d7322ed99d8ff64fc91ba9ff7
SHA1 hash:
35205a579a65a8fe4501be02eed01fcddf86fe88
Link:
https://www.unpac.me/results/4738f62f-be7e-4d60-ba9e-38a970622cdd/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/31b78f85d2a1/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/31b78f85d2a1aa72f3ec47187d3ef589375825c0c3a4434649f874f3c7cb8cfd

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

Malspam

Formbook

Executable exe 31b78f85d2a1aa72f3ec47187d3ef589375825c0c3a4434649f874f3c7cb8cfd

(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 (GUARD_CF)high

Comments