MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 99f159f5917886ccb644cbb4d99a570f55fac5845a2869a7afbeccfe464f7a71. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 99f159f5917886ccb644cbb4d99a570f55fac5845a2869a7afbeccfe464f7a71
SHA3-384 hash: a9fe505b0de58b6dfef1d5b861a4162cb3a989c8f4a4239a81005db0d086d33e26b99904bfacfa843e88a067dd16f301
SHA1 hash: 5bb870cecea212bde20c65b488644b7e1a9ce690
MD5 hash: 168c4f14b651c33c525f7ae23209113b
humanhash: island-music-gee-carolina
File name:A1234.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:820'224 bytes
First seen:2024-02-05 14:40:46 UTC
Last seen:2024-02-05 16:40:07 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'462 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 24576:l7V68yq0N4L/Y7kYktG+mXvYjpzEr849cxH:l7VsqCkk+FVzo84O
TLSH T1BE051248AE92174EF4BF4AF554925116A3B58C271632F72B8DC639EC940FB5B0A02F1F
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)
File icon (PE):PE icon
dhash icon 08080786e869b68a (12 x AgentTesla, 4 x Formbook, 2 x AsyncRAT)
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
281
Origin country :
NL NL
Vendor Threat Intelligence
Detection:
AgentTesla
Create hunting rule
Link:
https://www.capesandbox.com/analysis/474728/
Detection(s):
Porcupine.Malware.58887.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/65c0f3871a072d56526656ee/reports/6386cdf5-4382-436a-a7e4-39a06e4e5dfa/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/99f159f5917886ccb644cbb4d99a570f55fac5845a2869a7afbeccfe464f7a71
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/9695a98d-51fa-4959-a31c-9ac90e62bd5b
Result
Threat name:
AgentTesla
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1386848
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Adds a directory exclusion to Windows Defender
Check if machine is in data center or colocation facility
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Contains functionality to log keystrokes (.Net Source)
Found malware configuration
Icon mismatch, binary includes an icon from a different legit application in order to fool users
Injects a PE file into a foreign processes
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Queries sensitive network adapter information (via WMI, Win32_NetworkAdapter, often done to detect virtual machines)
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Snort IDS alert for network traffic
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to harvest and steal browser information (history, passwords, etc)
Tries to harvest and steal Putty / WinSCP information (sessions, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Uses the Telegram API (likely for C&C communication)
Yara detected AgentTesla
Yara detected AntiVM3
Yara detected Generic Downloader
Yara detected Telegram RAT
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/99f159f5917886ccb644cbb4d99a570f55fac5845a2869a7afbeccfe464f7a71
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/99f159f5917886ccb644cbb4d99a570f55fac5845a2869a7afbeccfe464f7a71/
Threat name:
ByteCode-MSIL.Trojan.SnakeKeylogger
Create hunting rule
Status:
Malicious
First seen:
2024-02-05 07:47:51 UTC
File Type:
PE (.Net Exe)
Extracted files:
14
AV detection:
20 of 37 (54.05%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=thyvt5mrpcdmznsezo2ntgsxb5k7vrmeliugtj5px3gp4rsppjyq._file
Verdict:
malicious
Label(s):
agenttesla_v4
Create hunting rule
agenttesla
Create hunting rule
Result
Malware family:
agenttesla
Create hunting rule
Score:
  10/10
Tags:
family:agenttesla keylogger spyware stealer trojan
Link:
https://tria.ge/reports/240205-r2fd2sabg4/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Looks up external IP address via web service
Checks computer location settings
Reads data files stored by FTP clients
Reads user/profile data of local email clients
Reads user/profile data of web browsers
AgentTesla
Malware Config
C2 Extraction:
https://api.telegram.org/bot6740417848:AAG5U7WvWwupGTM8CQIMwDQuy1jwkD8O49I/
Unpacked files
SH256 hash:
5fe50b7d9a6e9214e727581ebb1dfeb43e175c39ba3966684030f5da4c0c64bf
MD5 hash:
f6b2186dd134aed59815a420cc5ccc8c
SHA1 hash:
569326a8f69da0b50854f18c86805b019cd902fd
Link:
https://www.unpac.me/results/673ed4d6-572c-445f-9581-fa929fd389e9/
SH256 hash:
f4d18078f32176e0ebde16a6cf345d09e6933fb38222797d273f00739f605f7a
MD5 hash:
9bdf381423d30a68a3303e6b6b5e49a1
SHA1 hash:
4cfe7c6e91e7095ff2806c864b8310b7c76625da
Link:
https://www.unpac.me/results/673ed4d6-572c-445f-9581-fa929fd389e9/
SH256 hash:
9ed18febb6ebc761c68b28f8012777926f0ea84dddb6c806ea39e05a4609e283
MD5 hash:
b7823d1781347ff333bfc6dafe0cb043
SHA1 hash:
3bf66e0f7b6379685cadbc2e468e495c298f2d9e
Link:
https://www.unpac.me/results/673ed4d6-572c-445f-9581-fa929fd389e9/
SH256 hash:
7262aa9512e9df117a915025d330ae0f3ddeb373165ab0f7b4a1f9391cdcb1ec
MD5 hash:
5fa593d3d19c5a59a9e70ad188f9b12a
SHA1 hash:
1fcb645811776c7dec24de2b9964db5d919c5584
Detections:
win_agent_tesla_g2
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_Referenfces_File_Transfer_Clients
Create hunting rule
Agenttesla_type2
Create hunting rule
INDICATOR_SUSPICIOUS_Binary_References_Browsers
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_VaultSchemaGUID
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_References_Messaging_Clients
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_SandboxHookingDLL
Create hunting rule
INDICATOR_EXE_Packed_GEN01
Create hunting rule
INDICATOR_SUSPICIOUS_EXE_References_Confidential_Data_Store
Create hunting rule
Link:
https://www.unpac.me/results/673ed4d6-572c-445f-9581-fa929fd389e9/
Parent samples :
72a051505abb9381f7e7b9256a38007e6b2f73915fd0b6d1891bae17063e8259
2fa6ba3acae6c4b4f84d37bc92e12bee1da7e42cd351d6261a7fb63d104d52e2
99f159f5917886ccb644cbb4d99a570f55fac5845a2869a7afbeccfe464f7a71
SH256 hash:
99f159f5917886ccb644cbb4d99a570f55fac5845a2869a7afbeccfe464f7a71
MD5 hash:
168c4f14b651c33c525f7ae23209113b
SHA1 hash:
5bb870cecea212bde20c65b488644b7e1a9ce690
Link:
https://www.unpac.me/results/673ed4d6-572c-445f-9581-fa929fd389e9/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/99f159f59178/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/99f159f5917886ccb644cbb4d99a570f55fac5845a2869a7afbeccfe464f7a71

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:AgentTesla_DIFF_Common_Strings_01
Create hunting rule
Author:schmidtsz
Description:Identify partial Agent Tesla strings
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

Executable exe 99f159f5917886ccb644cbb4d99a570f55fac5845a2869a7afbeccfe464f7a71

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/474728/

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