MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 84a3bc78a6676d66031cb313cd0711224f9d7a650cc547811f34285c1acf8491. 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: 16


Intelligence 16 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 84a3bc78a6676d66031cb313cd0711224f9d7a650cc547811f34285c1acf8491
SHA3-384 hash: fbef355fcd8799c0ea182a058491985006b0905f08be7b77196e01bec307a8595273a9e06f751aaeb1bf42072819deb7
SHA1 hash: 8ffd12528f8e610a3ec2aed88b48ddd65a102dae
MD5 hash: bbbddf1e78e63b0e6cfb46912b3549c7
humanhash: cold-fish-seven-november
File name:PO# 81136575.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:764'416 bytes
First seen:2024-09-12 07:54:54 UTC
Last seen:2024-09-12 08:24:36 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'738 x AgentTesla, 19'597 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 12288:At3MWH0Jb2mu2jU4qnc0FaYj662Pv+NK5m5+yTU9ETs/Qz8/mpqViwt5XH7:+3MWH0BOP7PMYYeNXhTlTJz81iw5
Threatray 3'366 similar samples on MalwareBazaar
TLSH T1CAF412352318D699C5AB07B50AB6E53207B67F6EB121E30E8FDB8CD774687003914EA3
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10523/12/4)
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 0c6e62e2faaac0c8 (6 x AgentTesla, 5 x Formbook, 2 x SnakeKeylogger)
Reporter cocaman
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
395
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
PO# 81136575.exe
Verdict:
Suspicious activity
Analysis date:
2024-09-12 07:56:52 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/e49050ec-d413-46a8-bc78-35b1db13fc10

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.3057.24054.8371.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
94.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66e29e58751db35a8b9f7dbb
Tags:
Execution Network Static Stealth
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a file in the %temp% directory
Launching a process
Creating a file
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
packed phishing
Link:
https://www.filescan.io/uploads/66e29e5a8c40ae392b3de4bd/reports/2fad4ea1-68fa-4a1a-8ab1-4f44be7a261b/overview
Verdict:
Malicious
Labled as:
Malware
Link:
https://www.hybrid-analysis.com/sample/84a3bc78a6676d66031cb313cd0711224f9d7a650cc547811f34285c1acf8491
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:
Agent Tesla
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/51956b20-71c5-4f1c-9400-8f5df6fcf4c3
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1509910
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
AI detected suspicious sample
Allocates memory in foreign processes
Initial sample is a PE file and has a suspicious name
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)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Scheduled temp file as task from temp location
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 signatures2 2 Behavior Graph ID: 1509910 Sample: PO# 81136575.exe Startdate: 12/09/2024 Architecture: WINDOWS Score: 100 44 Malicious sample detected (through community Yara rule) 2->44 46 Sigma detected: Scheduled temp file as task from temp location 2->46 48 Multi AV Scanner detection for submitted file 2->48 50 9 other signatures 2->50 7 PO# 81136575.exe 7 2->7         started        11 KrhxPOy.exe 5 2->11         started        process3 file4 36 C:\Users\user\AppData\Roaming\KrhxPOy.exe, PE32 7->36 dropped 38 C:\Users\user\...\KrhxPOy.exe:Zone.Identifier, ASCII 7->38 dropped 40 C:\Users\user\AppData\Local\...\tmp797F.tmp, XML 7->40 dropped 42 C:\Users\user\...\PO# 81136575.exe.log, ASCII 7->42 dropped 52 Writes to foreign memory regions 7->52 54 Allocates memory in foreign processes 7->54 56 Adds a directory exclusion to Windows Defender 7->56 58 Injects a PE file into a foreign processes 7->58 13 powershell.exe 23 7->13         started        16 powershell.exe 23 7->16         started        18 schtasks.exe 1 7->18         started        20 RegSvcs.exe 7->20         started        60 Multi AV Scanner detection for dropped file 11->60 62 Machine Learning detection for dropped file 11->62 22 schtasks.exe 1 11->22         started        24 RegSvcs.exe 11->24         started        signatures5 process6 signatures7 64 Loading BitLocker PowerShell Module 13->64 26 WmiPrvSE.exe 13->26         started        28 conhost.exe 13->28         started        30 conhost.exe 16->30         started        32 conhost.exe 18->32         started        34 conhost.exe 22->34         started        process8
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/84a3bc78a6676d66031cb313cd0711224f9d7a650cc547811f34285c1acf8491
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/84a3bc78a6676d66031cb313cd0711224f9d7a650cc547811f34285c1acf8491/
Threat name:
ByteCode-MSIL.Trojan.Taskun
Create hunting rule
Status:
Malicious
First seen:
2024-09-12 07:55:00 UTC
File Type:
PE (.Net Exe)
Extracted files:
12
AV detection:
19 of 24 (79.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qsr3y6fgm5wwmay4wmj42byrejhz26tfbtcupai7gqufygwpqsiq._file
Verdict:
malicious
Similar samples:
2fd225d75dd151496e47e552a46a487e51a8c8c426a8e715c587368defbad256
Formbook
356108c722dbfed7782c279d388601706606ef10915929bc0c0732aa9b4e9cea
Formbook
5f34961a8ffa3b3a50b309877283e04db10c8d9ad4ed4dc4d810029e12aa1bd7
Formbook
aa6b8820cd838b9e7f2279f34b9089153d1014f57bbbe4afa626cf2335f5f382
Formbook
f4bd1f9dec0127be05780b194dba31eda1a4882ec5df8e46c93aa6b58a5f337e
Formbook
+ 3'356 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
discovery execution
Link:
https://tria.ge/reports/240912-jr41nayemk/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
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
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/5c1382c0-864e-4ce7-a4ea-ee0ee9304289
Unpacked files
SH256 hash:
e6e3cb3e7fcb62cd1512335ae65bb3abb62965dcfa31e53c4a1d57322f2c9b51
MD5 hash:
19ab34483041cf2eb0f732e7d5c6b6bb
SHA1 hash:
1dfcee1c9adab8a9d39f4f0b81b24ae0ef4fc8b0
Link:
https://www.unpac.me/results/04ccf4e0-caad-4327-8afe-a67a1ddd27a3/
SH256 hash:
8a8711900d95a0aaa5e50cb97aeaf0b6902f92b41b6c0f7be3938cb8c9c540aa
MD5 hash:
3067a2274194d7ca7ef2c29c2f3aa93b
SHA1 hash:
f85354548490856786dafa60e002dee1addd825a
Link:
https://www.unpac.me/results/04ccf4e0-caad-4327-8afe-a67a1ddd27a3/
SH256 hash:
5240f11df12afc41c8e9542643da7792ce2c3f7f8bc01921eae8082735275a7d
MD5 hash:
dbe4fd76984bb734f24015438031982d
SHA1 hash:
4b23577b26417562a37c74d98611d1dfb0bf8223
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/04ccf4e0-caad-4327-8afe-a67a1ddd27a3/
SH256 hash:
c59a72e874640d2d2c5669edc14fdeb82a72cbacde61679907d2926b8ed79d08
MD5 hash:
b37fc99b846edbde0d0f36bee1760849
SHA1 hash:
0016396b048dcbda5b87742c32678f706db6362c
Link:
https://www.unpac.me/results/04ccf4e0-caad-4327-8afe-a67a1ddd27a3/
SH256 hash:
84a3bc78a6676d66031cb313cd0711224f9d7a650cc547811f34285c1acf8491
MD5 hash:
bbbddf1e78e63b0e6cfb46912b3549c7
SHA1 hash:
8ffd12528f8e610a3ec2aed88b48ddd65a102dae
Link:
https://www.unpac.me/results/04ccf4e0-caad-4327-8afe-a67a1ddd27a3/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/84a3bc78a667/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/84a3bc78a6676d66031cb313cd0711224f9d7a650cc547811f34285c1acf8491

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:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

Formbook

zip 61a0624ee6690b4a12431c8665ce020fc7e9513b90b3e3058bbbd979297d34cb

Formbook

Executable exe 84a3bc78a6676d66031cb313cd0711224f9d7a650cc547811f34285c1acf8491

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 61a0624ee6690b4a12431c8665ce020fc7e9513b90b3e3058bbbd979297d34cb
  
Dropped by
MD5 457361aecce44860d66f4b367fb6cd2d

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