MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 26f52d29815a25e021c0ac37bb0712833cb21c3b4e97ccd5b35199de3b3f2e92. 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
| SHA256 hash: | 26f52d29815a25e021c0ac37bb0712833cb21c3b4e97ccd5b35199de3b3f2e92 |
|---|---|
| SHA3-384 hash: | f409a7e8a2b5a9393b2cb18896eaa69440c06fdbefdf49b62ab26ba2e0587515f4b842250f5a2a04e476e9f78e2424cd |
| SHA1 hash: | 263529ddc12178772a6ccc02109e7633a30c8277 |
| MD5 hash: | b044abe166330aaf79e842d232d71377 |
| humanhash: | sixteen-grey-jersey-butter |
| File name: | sheetsexe.exe |
| Download: | download sample |
| Signature | Formbook |
| File size: | 326'656 bytes |
| First seen: | 2025-07-15 13:25:17 UTC |
| Last seen: | 2025-07-16 11:14:16 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'609 x Formbook, 12'242 x SnakeKeylogger) |
| ssdeep | 3072:acq3LM6YMIZyr4Jliv6cG/a5/mOwJpowPRJZiYzw4Db9ps3hyIOkOn7GSdGwJu5D:1q3MMIE031vJpZGYFD8ROFXJu0D |
| Threatray | 4'708 similar samples on MalwareBazaar |
| TLSH | T1836406507BE88A1AF2FE2BB5F83660114BB4F856E47AC74E9E8460DD1C637489D0137B |
| TrID | 66.5% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13) 9.5% (.EXE) Win64 Executable (generic) (10522/11/4) 5.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 4.5% (.EXE) Win16 NE executable (generic) (5038/12/1) 4.0% (.EXE) Win32 Executable (generic) (4504/4/1) |
| Magika | pebin |
| dhash icon | a582868aa6a2873f (2 x Formbook) |
| Reporter |  threatcat_ch |
| Tags: | exe FormBook |
Intelligence
File Origin
# of uploads :
2
# of downloads :
37
Origin country :
CHVendor Threat Intelligence
Malware family:
formbook
ID:
1
File name:
_26f52d29815a25e021c0ac37bb0712833cb21c3b4e97ccd5b35199de3b3f2e92.exe
Verdict:
Malicious activity
Analysis date:
2025-07-15 13:26:46 UTC
Tags:
purecrypter netreactor formbook stealer xloader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
91.7%
Tags:
dotnet micro smtp
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Сreating synchronization primitives
Sending an HTTP GET request to an infection source
Sending a custom TCP request
Launching a process
Launching cmd.exe command interpreter
Setting browser functions hooks
Connection attempt to an infection source
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Unknown
Threat level:
2.5/10
Confidence:
100%
Tags:
expand lolbin obfuscated obfuscated remote
Verdict:
Malicious
Labled as:
Strictor.Generic
Verdict:
Malicious
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
C2 URLs / IPs found in malware configuration
Found direct / indirect Syscall (likely to bypass EDR)
Found malware configuration
Joe Sandbox ML detected suspicious 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)
Modifies the prolog of user mode functions (user mode inline hooks)
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
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM3
Yara detected Costura Assembly Loader
Yara detected FormBook
Behaviour
Behavior Graph:
Score:
70%
Verdict:
Susipicious
File Type:
PE
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable PE (Portable Executable) SOS: 0.02 Win 32 Exe x86
Detection:
formbook
Threat name:
Win32.Backdoor.FormBook
Status:
Suspicious
First seen:
2025-07-15 13:21:18 UTC
File Type:
PE (.Net Exe)
Extracted files:
8
AV detection:
21 of 24 (87.50%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
formbook
Similar samples:
+ 4'698 additional samples on MalwareBazaar
Result
Malware family:
formbook
Score:
10/10
Tags:
family:formbook campaign:um09 discovery rat spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Formbook payload
Formbook
Formbook family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
26f52d29815a25e021c0ac37bb0712833cb21c3b4e97ccd5b35199de3b3f2e92
MD5 hash:
b044abe166330aaf79e842d232d71377
SHA1 hash:
263529ddc12178772a6ccc02109e7633a30c8277
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.77
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: | INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA |
|---|---|
| Author: | ditekSHen |
| Description: | Detects Windows executables referencing non-Windows User-Agents |
| Rule name: | Lumma_Stealer_Detection |
|---|---|
| Author: | ashizZz |
| Description: | Detects a specific Lumma Stealer malware sample using unique strings and behaviors |
| Reference: | https://seanthegeek.net/posts/compromized-store-spread-lumma-stealer-using-fake-captcha/ |
| Rule name: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | NETexecutableMicrosoft |
|---|---|
| Author: | malware-lu |
| Rule name: | pe_imphash |
|---|
| Rule name: | Skystars_Malware_Imphash |
|---|---|
| Author: | Skystars LightDefender |
| Description: | imphash |
| Rule name: | Sus_CMD_Powershell_Usage |
|---|---|
| Author: | XiAnzheng |
| Description: | May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP) |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
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
| ID | Title | Severity |
|---|---|---|
| CHECK_AUTHENTICODE | Missing Authenticode | high |
| CHECK_DLL_CHARACTERISTICS | Missing dll Security Characteristics (GUARD_CF) | high |
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