MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 b85b6101f5f24710f8c9d5a32a4fa4194c55d1088c8722b08653aac9e6a3007a. 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
| SHA256 hash: | b85b6101f5f24710f8c9d5a32a4fa4194c55d1088c8722b08653aac9e6a3007a |
|---|---|
| SHA3-384 hash: | 5eb5b69a769deab3960265ca33e5dcf71ac192911ed0fce72d32ca7bce911c00f8c7b963b80241403c5cf2cfff18ae6a |
| SHA1 hash: | 81098d77f90fe9cb7f8953345c7385c35597bdfd |
| MD5 hash: | d1313aa99a8d454aa0d3b728a67dd331 |
| humanhash: | stairway-november-happy-michigan |
| File name: | d1313aa99a8d454aa0d3b728a67dd331.exe |
| Download: | download sample |
| Signature | Formbook |
| File size: | 862'208 bytes |
| First seen: | 2022-03-18 11:40:10 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'607 x Formbook, 12'242 x SnakeKeylogger) |
| ssdeep | 24576:oU5/e2towVUg5kntcywcJyeazDgarUJw:oU5/eLwVUg5ktPwcJyeazkS |
| Threatray | 14'210 similar samples on MalwareBazaar |
| TLSH | T1EA05C0199B3FA411E07ADAB71134C9E8963497F5EFDF122D0C481C532CAA98385FE593 |
| Reporter |  abuse_ch |
| Tags: | exe FormBook |
Intelligence
File Origin
# of uploads :
1
# of downloads :
193
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Adding an access-denied ACE
Launching a process
Сreating synchronization primitives
Creating a file
Launching the process to change network settings
Launching cmd.exe command interpreter
Sending a custom TCP request
DNS request
Sending an HTTP GET request
Searching for synchronization primitives
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
explorer.exe obfuscated packed replace.exe
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
Verdict:
Malicious
Result
Threat name:
AsyncRAT FormBook
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
.NET source code contains very large array initializations
.NET source code references suspicious native API functions
Contains functionality to hide user accounts
Found malware configuration
Injects a PE file into a foreign processes
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 submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected AsyncRAT
Yara detected FormBook
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Detection:
formbook
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Status:
Malicious
First seen:
2022-03-17 15:12:58 UTC
File Type:
PE (.Net Exe)
Extracted files:
1
AV detection:
21 of 27 (77.78%)
Threat level:
5/5
Detection(s):
Malicious file
Verdict:
malicious
Label(s):
formbook
agenttesla
Similar samples:
+ 14'200 additional samples on MalwareBazaar
Result
Malware family:
xloader
Score:
10/10
Tags:
family:xloader campaign:arh2 loader rat
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Program crash
Suspicious use of SetThreadContext
Xloader Payload
Xloader
Unpacked files
SH256 hash:
b85b6101f5f24710f8c9d5a32a4fa4194c55d1088c8722b08653aac9e6a3007a
MD5 hash:
d1313aa99a8d454aa0d3b728a67dd331
SHA1 hash:
81098d77f90fe9cb7f8953345c7385c35597bdfd
Malware family:
XLoader
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
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: | crime_win32_ransom_avaddon_1 |
|---|---|
| Author: | @VK_Intel |
| Description: | Detects Avaddon ransomware |
| Reference: | https://twitter.com/VK_Intel/status/1300944441390370819 |
| Rule name: | malware_Formbook_strings |
|---|---|
| Author: | JPCERT/CC Incident Response Group |
| Description: | detect Formbook in memory |
| Reference: | internal research |
| Rule name: | pe_imphash |
|---|
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | win_formbook_auto |
|---|---|
| Author: | Felix Bilstein - yara-signator at cocacoding dot com |
| Description: | Detects win.formbook. |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Web download
Delivery method
Distributed via web download
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