MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a6604cb175b8b162e4657114ab071ce8e1e04f79e6615201f01f4d16f985cead. 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 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a6604cb175b8b162e4657114ab071ce8e1e04f79e6615201f01f4d16f985cead
SHA3-384 hash: a4e4600858b3ccffd4bd293e61f4fa0b75aa9825c316bbe25988a6675b823cdad8d1c37512f029f35580e9327ffdd17d
SHA1 hash: 14be46147b431e56345a64f1d43b44ef0cb064f6
MD5 hash: 7102ad31aefa964c627a1d2d2cd5db79
humanhash: charlie-romeo-twenty-papa
File name:RFQ Specification Sheet Taiwan PRJ00498736.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'047'040 bytes
First seen:2026-07-20 06:33:18 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (49'123 x AgentTesla, 20'137 x Formbook, 12'362 x SnakeKeylogger)
ssdeep 24576:fYj/Og3PVFoQ/HB+Bc0q/+y9WIN3Dv0A4EZg4IOlwVt:yPfVSQ/h+BcQI9v0A4EZAOlwr
TLSH T1332512C5B7E9EB16E6B447F00AB0E13147786C2AA031D30A5DEAFCDBBA75B151810793
TrID 73.9% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
6.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
6.6% (.EXE) Win64 Executable (generic) (6522/11/2)
4.5% (.EXE) Win32 Executable (generic) (4504/4/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Magika pebin
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
179
Origin country :
DE DE
Vendor Threat Intelligence
Malware configuration found for:
RoboSki
Details
Link:
https://research.acce.ciphertechsolutions.com/results/dcd2da96-051f-4418-b9ac-8f4523d5aa32/
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/75245/
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a5dc140bcffb2c48cb79a0e
Tags:
micro shell spawn
Result
Verdict:
Malware
Maliciousness:

Behaviour
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a file in the %temp% directory
Launching a process
Creating a file
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Creating a file in the %AppData% directory
Enabling autorun with the standard Software\Microsoft\Windows\CurrentVersion\Run registry branch
Forced shutdown of a system process
Adding an exclusion to Microsoft Defender
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
base64 dropper obfuscated packed
Link:
https://www.filescan.io/uploads/6a5dc13b2fe882856113dd53/reports/a33312c9-0e54-47f1-bddf-d1001c80219f/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/a6604cb175b8b162e4657114ab071ce8e1e04f79e6615201f01f4d16f985cead
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-07-20T01:56:00Z UTC
Last seen:
2026-07-22T04:11:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/a6604cb175b8b162e4657114ab071ce8e1e04f79e6615201f01f4d16f985cead/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/1283b045-c993-4b85-a81c-82f1930249cf
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.expl.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1945008
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Binary is likely a compiled AutoIt script file
Bypasses PowerShell execution policy
Creates an autostart registry key pointing to binary in C:\Windows
Creates autostart registry keys with suspicious values (likely registry only malware)
Found direct / indirect Syscall (likely to bypass EDR)
Initial sample is a PE file and has a suspicious name
Joe Sandbox ML detected suspicious sample
Loading BitLocker PowerShell Module
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 dropped file
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sigma detected: New RUN Key Pointing to Suspicious Folder
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Script Interpreter Execution From Suspicious Folder
Sigma detected: Suspicious Script Execution From Temp Folder
Suricata IDS alerts for network traffic
Suspicious powershell command line found
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)
Unusual module load detection (module proxying)
Yara detected AntiVM3
Yara detected FormBook
Yara detected Powershell decode and execute
Yara detected UAC Bypass using CMSTP
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1945008 Sample: RFQ Specification Sheet Tai... Startdate: 20/07/2026 Architecture: WINDOWS Score: 100 59 www.789700305.xyz 2->59 61 www.zapecs.ru 2->61 63 24 other IPs or domains 2->63 85 Suricata IDS alerts for network traffic 2->85 87 Antivirus / Scanner detection for submitted sample 2->87 89 Multi AV Scanner detection for submitted file 2->89 93 14 other signatures 2->93 10 RFQ Specification Sheet Taiwan  PRJ00498736.exe 1 7 2->10         started        14 powershell.exe 15 2->14         started        16 powershell.exe 16 2->16         started        signatures3 91 Performs DNS queries to domains with low reputation 59->91 process4 file5 51 C:\Users\user\AppData\Roaming\rGDYvQZ.exe, PE32 10->51 dropped 53 C:\Users\user\...\rGDYvQZ.exe:Zone.Identifier, ASCII 10->53 dropped 55 C:\Users\user\AppData\...\1fsjkb3432u.ps1, ASCII 10->55 dropped 57 RFQ Specification ...PRJ00498736.exe.log, ASCII 10->57 dropped 103 Creates autostart registry keys with suspicious values (likely registry only malware) 10->103 105 Creates an autostart registry key pointing to binary in C:\Windows 10->105 107 Adds a directory exclusion to Windows Defender 10->107 18 MSBuild.exe 10->18         started        21 powershell.exe 23 10->21         started        23 rGDYvQZ.exe 3 14->23         started        25 conhost.exe 14->25         started        27 rGDYvQZ.exe 16->27         started        29 conhost.exe 16->29         started        signatures6 process7 signatures8 71 Modifies the context of a thread in another process (thread injection) 18->71 73 Maps a DLL or memory area into another process 18->73 75 Queues an APC in another process (thread injection) 18->75 83 3 other signatures 18->83 31 u45WzL1GgUThcb.exe 18->31 injected 77 Loading BitLocker PowerShell Module 21->77 34 conhost.exe 21->34         started        79 Antivirus detection for dropped file 23->79 81 Multi AV Scanner detection for dropped file 23->81 36 MSBuild.exe 23->36         started        38 MSBuild.exe 27->38         started        process9 signatures10 111 Binary is likely a compiled AutoIt script file 31->111 40 unregmp2.exe 13 31->40         started        43 ctfmon.exe 31->43         started        process11 signatures12 95 Tries to steal Mail credentials (via file / registry access) 40->95 97 Tries to harvest and steal browser information (history, passwords, etc) 40->97 99 Modifies the context of a thread in another process (thread injection) 40->99 101 3 other signatures 40->101 45 FuL35TNrAay.exe 40->45 injected 49 firefox.exe 40->49         started        process13 dnsIp14 65 www.kuntec-alloy.com 43.157.242.193, 49822, 49823, 49824 TENCENT-NET-AP-CNTencentBuildingKejizhongyiAvenueCN Indonesia 45->65 67 www.henryce.com 191.214.242.130, 49818, 49819, 49820 SH2206-APUNITA179FSILVERCORPINTLTOWER707-713NATHANRDHK Hong Kong SAR China 45->67 69 12 other IPs or domains 45->69 109 Binary is likely a compiled AutoIt script file 45->109 signatures15
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a6604cb175b8b162e4657114ab071ce8e1e04f79e6615201f01f4d16f985cead
Verdict:
inconclusive
YARA:
10 match(es)
Tags:
.Net Executable Managed .NET PE (Portable Executable) PE File Layout SOS: 0.53 Win 32 Exe x86
Link:
https://app.malva.re/file/7102ad31aefa964c627a1d2d2cd5db79
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a6604cb175b8b162e4657114ab071ce8e1e04f79e6615201f01f4d16f985cead/
Threat name:
ByteCode-MSIL.Backdoor.FormBook
Create hunting rule
Status:
Malicious
First seen:
2026-07-20 06:34:51 UTC
File Type:
PE (.Net Exe)
Extracted files:
9
AV detection:
17 of 24 (70.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=uzqezmlvxcywfzdfoekkwby45dq6at3z4zqveapqd5grn6mfz2wq._file
Verdict:
malicious
Label(s):
Formbook
Create hunting rule
Link:
https://reports.threatray.com/fc672460-b534-4ebe-ae80-7afb14da60e2
Similar samples:
a6604cb175b8b162e4657114ab071ce8e1e04f79e6615201f01f4d16f985cead
Formbook
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook adware collection discovery execution persistence rat spyware stealer trojan
Link:
https://tria.ge/reports/260720-hbgprabw7t/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
outlook_office_path
System Location Discovery: System Language Discovery
Enumerates physical storage devices
SmartAssembly .NET packer
Suspicious use of SetThreadContext
Accesses Microsoft Outlook profiles
Adds Run key to start application
Checks computer location settings
Executes dropped EXE
Command and Scripting Interpreter: PowerShell
Family: Formbook
Formbook payload
Unpacked files
SH256 hash:
a6604cb175b8b162e4657114ab071ce8e1e04f79e6615201f01f4d16f985cead
MD5 hash:
7102ad31aefa964c627a1d2d2cd5db79
SHA1 hash:
14be46147b431e56345a64f1d43b44ef0cb064f6
Link:
https://www.unpac.me/results/c345dd4d-67ea-4031-8f0d-431165d07c7d/
SH256 hash:
01ff3e706f0f3928207b5e020eebb9ed38428dfbbf0f8c46aeec328b73519160
MD5 hash:
bbb0d2ca9a21d5a1f6c9059e108ea3ee
SHA1 hash:
5accd45f4a70a26b6ce07e04cc3820e99187a818
Link:
https://www.unpac.me/results/c345dd4d-67ea-4031-8f0d-431165d07c7d/
SH256 hash:
13d31ff80a2bd90047ed5a45d314cc4c6914d0d5a3b4f5a0993dda941b8b2092
MD5 hash:
bf30ef41a77167d7b6bb4374d990d63d
SHA1 hash:
5e9b96cf6b66804d59662407e40e085ef508c4a1
Link:
https://www.unpac.me/results/c345dd4d-67ea-4031-8f0d-431165d07c7d/
SH256 hash:
624ec23b9b1fde34643f6ac34c80aa5dc85c9a843c183d92dc8cf4e1f662da2c
MD5 hash:
b800871bae24b1981af76ebac7a31ecd
SHA1 hash:
f400173f8405163a95e6d4b5a09aa89faec838d7
Link:
https://www.unpac.me/results/c345dd4d-67ea-4031-8f0d-431165d07c7d/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a6604cb175b8/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/a6604cb175b8b162e4657114ab071ce8e1e04f79e6615201f01f4d16f985cead

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:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
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
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
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

Formbook

Executable exe a6604cb175b8b162e4657114ab071ce8e1e04f79e6615201f01f4d16f985cead

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/75245/

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