MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 104d7263dd77981b760c26e0fb61986e6aa2a3e86eab2ae4bc7468cf28eaf902. 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 20 File information Comments

SHA256 hash: 104d7263dd77981b760c26e0fb61986e6aa2a3e86eab2ae4bc7468cf28eaf902
SHA3-384 hash: 63d3b254feeb657d7c6e1173f07b0a663fbd217937a01b9c8bf7fec89a61f29e6eaa4f47e980f3178a71e17850a1252f
SHA1 hash: 07a8cb7cb1d57b6d0976d56e4a97644111db4b6a
MD5 hash: f4302131044ad2a9730f8865e69ac8ab
humanhash: ink-spaghetti-mexico-green
File name:REMITTANCE_ COPY16032025.exe
Download: download sample
Signature Formbook
File size:741'888 bytes
First seen:2025-08-15 23:17:48 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'650 x AgentTesla, 19'461 x Formbook, 12'202 x SnakeKeylogger)
ssdeep 12288:Ipcszdvtir0dhtKrLdPyr9+H+w8GSaL3+79zMPEmrxwZHTgYsGNPT3S:Im0YrOr9M+uSTNMPEmd4zgGT3
TLSH T15AF4125632A9C903D5F157F09EB1E3FC5378AF896001E3578EFAAEDBB871B006690191
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10522/11/4)
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
Reporter threatcat_ch
Tags:exe FormBook

Intelligence


File Origin
# of uploads :
1
# of downloads :
100
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
REMITTANCE_ COPY16032025.exe
Verdict:
No threats detected
Analysis date:
2025-08-15 23:19:00 UTC
Tags:
netreactor

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Сreating synchronization primitives
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
explorer lolbin obfuscated packed packed packer_detected vbnet
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
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
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Suricata IDS alerts for network traffic
Switches to a custom stack to bypass stack traces
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1758209 Sample: REMITTANCE_ COPY16032025.exe Startdate: 16/08/2025 Architecture: WINDOWS Score: 100 33 www.ecpay-tw067.xyz 2->33 35 www.78452609.xyz 2->35 37 19 other IPs or domains 2->37 45 Suricata IDS alerts for network traffic 2->45 47 Multi AV Scanner detection for submitted file 2->47 49 Yara detected FormBook 2->49 53 4 other signatures 2->53 10 REMITTANCE_ COPY16032025.exe 3 2->10         started        signatures3 51 Performs DNS queries to domains with low reputation 35->51 process4 file5 31 C:\Users\...\REMITTANCE_ COPY16032025.exe.log, ASCII 10->31 dropped 63 Injects a PE file into a foreign processes 10->63 14 REMITTANCE_ COPY16032025.exe 10->14         started        17 WerFault.exe 4 10->17         started        signatures6 process7 signatures8 65 Maps a DLL or memory area into another process 14->65 19 k2R2u3mRAxG.exe 14->19 injected process9 process10 21 proquota.exe 13 19->21         started        signatures11 55 Tries to steal Mail credentials (via file / registry access) 21->55 57 Tries to harvest and steal browser information (history, passwords, etc) 21->57 59 Modifies the context of a thread in another process (thread injection) 21->59 61 3 other signatures 21->61 24 f8hADRtZ.exe 21->24 injected 27 firefox.exe 21->27         started        29 chrome.exe 21->29         started        process12 dnsIp13 39 www.mireza.site 203.161.43.199, 49747, 49748, 49749 VNPT-AS-VNVNPTCorpVN Malaysia 24->39 41 www.hpzz.mobi 160.124.178.113, 49735, 49736, 49737 POWERLINE-AS-APPOWERLINEDATACENTERHK South Africa 24->41 43 10 other IPs or domains 24->43
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable Managed .NET PDB Path PE (Portable Executable) PE File Layout SOS: 0.39 Win 32 Exe x86
Threat name:
ByteCode-MSIL.Trojan.PureLogStealer
Status:
Malicious
First seen:
2025-08-15 19:45:13 UTC
File Type:
PE (.Net Exe)
Extracted files:
7
AV detection:
27 of 38 (71.05%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
formbook unc_loader_037
Similar samples:
Result
Malware family:
formbook
Score:
  10/10
Tags:
family:formbook discovery rat spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
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:
104d7263dd77981b760c26e0fb61986e6aa2a3e86eab2ae4bc7468cf28eaf902
MD5 hash:
f4302131044ad2a9730f8865e69ac8ab
SHA1 hash:
07a8cb7cb1d57b6d0976d56e4a97644111db4b6a
SH256 hash:
e833b4c040a54da76ec316ed0a58bd962c104ecfaf27de4113af7d3e7246a3a9
MD5 hash:
ad7cf108545cde32ec3ee332ce267e83
SHA1 hash:
39aeb72728b1c9e64593766e73435886fdd485b0
SH256 hash:
ffa38209dcde568431b9d7f0ba094cba6d9e92c9834837e3a912ce9623ad8e11
MD5 hash:
aa07c606d894404e4ec464a46737f1c8
SHA1 hash:
89376273deabd883cd82a828883bf479f8414fec
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24 SUSP_OBF_NET_Reactor_Indicators_Jan24
SH256 hash:
0b7cdf9dbe6f165393c87acaad5aa65e6882b9d5c54550ef3c597737e0ad32ff
MD5 hash:
7e4ca1b335ac6a61c1477a46e04dbaad
SHA1 hash:
a2ca1a9641a0ddc668c93f5f89eac2b67ecd0f8e
Please note that we are no longer able to provide a coverage score for Virus Total.

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:DebuggerCheck__GlobalFlags
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerCheck__QueryInfo
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Active
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DebuggerHiding__Thread
Reference:https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara
Rule name:DetectEncryptedVariants
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
Rule name:dgaagas
Author:Harshit
Description:Uses certutil.exe to download a file named test.txt
Rule name:Formbook
Author:kevoreilly
Description:Formbook Payload
Rule name:golang_bin_JCorn_CSC846
Author:Justin Cornwell
Description:CSC-846 Golang detection ruleset
Rule name:MD5_Constants
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:meth_stackstrings
Author:Willi Ballenthin
Rule name:NET
Author:malware-lu
Rule name:pe_imphash
Rule name:pe_no_import_table
Description:Detect pe file that no import table
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:shellcode
Author:nex
Description:Matched shellcode byte patterns
Rule name:Skystars_Malware_Imphash
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)
Rule name:win32_dotnet_form_obfuscate
Author:Reedus0
Description:Rule for detecting .NET form obfuscate malware

File information


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

Malspam

Formbook

Executable exe 104d7263dd77981b760c26e0fb61986e6aa2a3e86eab2ae4bc7468cf28eaf902

(this sample)

  
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
IDTitleSeverity
CHECK_AUTHENTICODEMissing Authenticodehigh
CHECK_DLL_CHARACTERISTICSMissing dll Security Characteristics (GUARD_CF)high

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