MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 8ab637e2cb18c2cd0e1a8e8458916f356f42a0579aa9f1fc522a52056402f6c4. 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: 13
| SHA256 hash: | 8ab637e2cb18c2cd0e1a8e8458916f356f42a0579aa9f1fc522a52056402f6c4 |
|---|---|
| SHA3-384 hash: | cbdd6dc6490cb5615b482d2b4fde07a8d6b7efa1a1a4bc1e2647a4562c58de9e61830c396881ea163a12265c07c0cf73 |
| SHA1 hash: | e97771cd5427565357b864e1131e646165381616 |
| MD5 hash: | 3e53cfb7d979edb8b26fb2827c4428d6 |
| humanhash: | double-mississippi-two-lithium |
| File name: | libcef.dll |
| Download: | download sample |
| Signature | Formbook |
| File size: | 2'936'320 bytes |
| First seen: | 2025-12-02 08:47:33 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 928969f4e86d2076055dd81212337225 (1 x Formbook) |
| ssdeep | 49152:En35cTUBUatv7bGUGR9SxyW2KluojxgwuPSpnjN9zPbK:En3qatzC4agjN |
| TLSH | T1E3D59D15A39006B4D82BE674CAA78333D6B1B8524370C24F2699D70A6F37BD29B3F715 |
| TrID | 48.7% (.EXE) Win64 Executable (generic) (10522/11/4) 23.3% (.EXE) Win16 NE executable (generic) (5038/12/1) 9.3% (.EXE) OS/2 Executable (generic) (2029/13) 9.2% (.EXE) Generic Win/DOS Executable (2002/3) 9.2% (.EXE) DOS Executable Generic (2000/1) |
| Magika | pebin |
| Reporter |  adrian__luca |
| Tags: | exe FormBook |
Intelligence
File Origin
# of uploads :
1
# of downloads :
103
Origin country :
HUVendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
libcef.dll
Verdict:
No threats detected
Analysis date:
2025-12-02 09:01:53 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Verdict:
Malicious
Score:
96.5%
Tags:
shellcode remcos virus
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
anti-debug fingerprint masquerade microsoft_visual_cc overlay packed
Verdict:
Malicious
Labled as:
Win64/Agent.ECK trojan
Verdict:
Malicious
File Type:
dll x64
First seen:
2025-11-26T12:51:00Z UTC
Last seen:
2025-12-04T07:16:00Z UTC
Hits:
~1000
Detections:
VHO:Trojan.Win32.Inject.gen PDM:Trojan.Win32.Generic Trojan.Win32.InjectorNetT.cuc Trojan.Win32.Inject.sb
Malware family:
Formbook
Verdict:
Malicious
Score:
93%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable PE (Portable Executable) PE File Layout Win 64 Exe x64
Verdict:
Malicious
Threat:
VHO:Trojan.Win32.Inject
Threat name:
Win64.Backdoor.FormBook
Status:
Suspicious
First seen:
2025-11-26 16:21:00 UTC
File Type:
PE+ (Dll)
AV detection:
21 of 38 (55.26%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
n/a
Score:
5/10
Tags:
n/a
Behaviour
Suspicious use of WriteProcessMemory
Program crash
Suspicious use of SetThreadContext
Verdict:
Unknown
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
8ab637e2cb18c2cd0e1a8e8458916f356f42a0579aa9f1fc522a52056402f6c4
MD5 hash:
3e53cfb7d979edb8b26fb2827c4428d6
SHA1 hash:
e97771cd5427565357b864e1131e646165381616
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
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: | CP_Script_Inject_Detector |
|---|---|
| Author: | DiegoAnalytics |
| Description: | Detects attempts to inject code into another process across PE, ELF, Mach-O binaries |
| Rule name: | DebuggerCheck__API |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DebuggerCheck__MemoryWorkingSet |
|---|---|
| Author: | Fernando Mercês |
| Description: | Anti-debug process memory working set size check |
| Reference: | http://www.gironsec.com/blog/2015/06/anti-debugger-trick-quicky/ |
| Rule name: | golang_bin_JCorn_CSC846 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| Rule name: | Jupyter_infostealer |
|---|---|
| Author: | CD_R0M_ |
| Description: | Rule for Jupyter Infostealer/Solarmarker malware from september 2021-December 2022 |
| Rule name: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | pe_detect_tls_callbacks |
|---|
| Rule name: | RIPEMD160_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for RIPEMD-160 constants |
| Rule name: | SEH__vectored |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | SHA1_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for SHA1 constants |
| Rule name: | ThreadControl__Context |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
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
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