MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a6f06cc81ea1f32259b6d9f45e3bd8b5ceef83c78041cf87a0acde5d3fc1a5ea. 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: a6f06cc81ea1f32259b6d9f45e3bd8b5ceef83c78041cf87a0acde5d3fc1a5ea
SHA3-384 hash: a7e2307f039bc8594364c4991464c5ca16e3948727412e555113659e7ec980703b4e74d98a30eba55fbddff5dab037af
SHA1 hash: fad4a1f0c7762dcfb1f89dc748d829adf04d1c08
MD5 hash: d8c1e3d95b1091fe2736ab13b6a1f551
humanhash: nineteen-skylark-vermont-emma
File name:rRFQ.bat
Download: download sample
Signature Formbook
Create hunting rule
File size:834'560 bytes
First seen:2024-08-28 23:06:10 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'599 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 12288:yO9r7hB8/65HLeqn20Nx6ls0JVtBRH86NdlPDakjAm9WmWaKej3GF/jvIGc2tAW+:ycr7T8SLxgSwlXljjWmW/86xt
Threatray 521 similar samples on MalwareBazaar
TLSH T16505E0D43620731ECD678831C568DD71A6A02D7AB206BAE764DB3B4B794C192DF08F93
TrID 69.7% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.0% (.EXE) Win64 Executable (generic) (10523/12/4)
6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.2% (.EXE) Win32 Executable (generic) (4504/4/1)
1.9% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Magika pebin
File icon (PE):PE icon
dhash icon d4d4d4d4d4d4d4f4 (4 x AgentTesla, 3 x Formbook, 2 x SnakeKeylogger)
Reporter FXOLabs
Tags:bat exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
374
Origin country :
BR BR
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
rRFQ.bat
Verdict:
Malicious activity
Analysis date:
2024-08-28 23:11:22 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/d10a0464-3dc2-4676-a01e-6796486936c1

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
SecuriteInfo.com.BackDoor.AgentTeslaNET.39.11963.26938.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66cfad65fe69a9e56049cc5a
Tags:
Execution Network Stealth Msil
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Сreating synchronization primitives
Creating a process with a hidden window
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a file in the %temp% directory
Launching a process
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Adding an exclusion to Microsoft Defender
Enabling autorun by creating a file
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
masquerade packed
Link:
https://www.filescan.io/uploads/66cfad9ab854095a010bd247/reports/cd957ebe-bc93-4693-ad95-7f65203a65ce/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/a6f06cc81ea1f32259b6d9f45e3bd8b5ceef83c78041cf87a0acde5d3fc1a5ea
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:
MSIL Injector
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/f6f45ea7-e1ae-414c-a39b-a10bc34474f0
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1500883
Signature
.NET source code contains potential unpacker
Adds a directory exclusion to Windows Defender
AI detected suspicious sample
Found direct / indirect Syscall (likely to bypass EDR)
Initial sample is a PE file and has a suspicious name
Injects a PE file into a foreign processes
Loading BitLocker PowerShell Module
Machine Learning detection for dropped file
Machine Learning detection for 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)
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: Powershell Base64 Encoded MpPreference Cmdlet
Sigma detected: Scheduled temp file as task from temp location
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)
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1500883 Sample: rRFQ.bat.exe Startdate: 29/08/2024 Architecture: WINDOWS Score: 100 57 www.slyra.xyz 2->57 59 www.070001294.xyz 2->59 61 17 other IPs or domains 2->61 73 Suricata IDS alerts for network traffic 2->73 75 Malicious sample detected (through community Yara rule) 2->75 77 Sigma detected: Scheduled temp file as task from temp location 2->77 81 8 other signatures 2->81 10 rRFQ.bat.exe 6 2->10         started        14 EnuiGTu.exe 4 2->14         started        signatures3 79 Performs DNS queries to domains with low reputation 59->79 process4 file5 51 C:\Users\user\AppData\RoamingnuiGTu.exe, PE32 10->51 dropped 53 C:\Users\user\...nuiGTu.exe:Zone.Identifier, ASCII 10->53 dropped 55 C:\Users\user\AppData\Local\...\tmp7C08.tmp, XML 10->55 dropped 91 Uses schtasks.exe or at.exe to add and modify task schedules 10->91 93 Adds a directory exclusion to Windows Defender 10->93 95 Injects a PE file into a foreign processes 10->95 16 rRFQ.bat.exe 10->16         started        19 powershell.exe 23 10->19         started        21 powershell.exe 23 10->21         started        27 2 other processes 10->27 97 Multi AV Scanner detection for dropped file 14->97 99 Machine Learning detection for dropped file 14->99 23 schtasks.exe 1 14->23         started        25 EnuiGTu.exe 14->25         started        signatures6 process7 signatures8 69 Maps a DLL or memory area into another process 16->69 29 AcvfMGWSLBysOL.exe 16->29 injected 71 Loading BitLocker PowerShell Module 19->71 32 WmiPrvSE.exe 19->32         started        34 conhost.exe 19->34         started        36 conhost.exe 21->36         started        38 conhost.exe 23->38         started        40 conhost.exe 27->40         started        process9 signatures10 101 Found direct / indirect Syscall (likely to bypass EDR) 29->101 42 mshta.exe 13 29->42         started        process11 signatures12 83 Tries to steal Mail credentials (via file / registry access) 42->83 85 Tries to harvest and steal browser information (history, passwords, etc) 42->85 87 Modifies the context of a thread in another process (thread injection) 42->87 89 3 other signatures 42->89 45 AcvfMGWSLBysOL.exe 42->45 injected 49 firefox.exe 42->49         started        process13 dnsIp14 63 www.dfbio.net 218.247.68.184, 64636, 64637, 64638 WEST263GO-HKWest263InternationalLimitedHK China 45->63 65 www.slyra.xyz 203.161.42.73, 49738, 49739, 49740 VNPT-AS-VNVNPTCorpVN Malaysia 45->65 67 11 other IPs or domains 45->67 103 Found direct / indirect Syscall (likely to bypass EDR) 45->103 signatures15
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/a6f06cc81ea1f32259b6d9f45e3bd8b5ceef83c78041cf87a0acde5d3fc1a5ea
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a6f06cc81ea1f32259b6d9f45e3bd8b5ceef83c78041cf87a0acde5d3fc1a5ea/
Threat name:
Win32.Trojan.Generic
Create hunting rule
Status:
Malicious
First seen:
2024-08-27 00:45:03 UTC
File Type:
PE (.Net Exe)
Extracted files:
18
AV detection:
24 of 38 (63.16%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=u3ygzsa6uhzsewnw3h2f4o6ywxho7a6hqba47b5avtpf2p6buxva._file
Verdict:
malicious
Similar samples:
567d0908ac95f5cffcc257768220ed029f66dec64ebe65cdd1dbf01d33e9f3e0
Formbook
58707dc5ed9d48044a6bc16ca98bd0b7c52e2038509dfbbe0657a6e11c5882b9
Formbook
631a4342a9dd60f4ddb58dab7fd5c9ce3c057dd3e48390e7c55efad86400ca0d
Formbook
866dc796d2727a535d138d80a3196c82dfefb4c38ac6b51f8c81ca381e035f45
Formbook
96edc0040c2e9b67c002d30f070cedc4be0a83fa48c3ccda7f5ffd4b88b99a09
Formbook
+ 511 additional samples on MalwareBazaar
Result
Malware family:
n/a
Score:
  8/10
Tags:
discovery execution
Link:
https://tria.ge/reports/240828-23y8natajn/
Behaviour
Scheduled Task/Job: Scheduled Task
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Checks computer location settings
Command and Scripting Interpreter: PowerShell
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/894744f7-5505-4cad-9771-b5b9cc9c7ff7
Unpacked files
SH256 hash:
0be891d682745bf1d26b0cfe3056872233c8fb07689d8fba64cdbe21aa3359e1
MD5 hash:
b6b2f98072609248f05f443ee31c919a
SHA1 hash:
3d2e7fbf16cec0a06d63fa59eea35e0ee52b193e
Link:
https://www.unpac.me/results/1dca7c29-8a52-4f45-8e4e-f07d455dd22c/
SH256 hash:
627e8372b1b86c0678ad08eb8bec11837ce77d444ee9f7456c6335c921f9ae74
MD5 hash:
239e2b1280bce257aa4225e24dc004fd
SHA1 hash:
4184ba3842e5911796120ca38f20fc21b808ef9b
Link:
https://www.unpac.me/results/1dca7c29-8a52-4f45-8e4e-f07d455dd22c/
SH256 hash:
379148dd85047d5d4fe425b3d6511af328b29954c8b65f75530d4664857eb595
MD5 hash:
3c66de8c98f1d2c93af505b3710a834e
SHA1 hash:
a49c90d424e0c10d5605c5521ee79fb9f3f59f18
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/1dca7c29-8a52-4f45-8e4e-f07d455dd22c/
Parent samples :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 hash:
c1f244e0043e53618b0f8619731e235fd0d29e77b1029ec556ccfea67d5cf220
MD5 hash:
ee78e8b2b43406e3fe7eed2232ffdf62
SHA1 hash:
5087167e3b5456e41730d0fcdaae606687ac56ed
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
SUSP_OBF_NET_Reactor_Indicators_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/1dca7c29-8a52-4f45-8e4e-f07d455dd22c/
SH256 hash:
d3a1affac62e23bb9ef53aae63d42a1e030d4e2c2e010a42f6013928712f7979
MD5 hash:
5300132dafe82e16c078073ff99c1dda
SHA1 hash:
1d65dd445a697efc8da86be10036188b0a46b7d6
Link:
https://www.unpac.me/results/1dca7c29-8a52-4f45-8e4e-f07d455dd22c/
SH256 hash:
a6f06cc81ea1f32259b6d9f45e3bd8b5ceef83c78041cf87a0acde5d3fc1a5ea
MD5 hash:
d8c1e3d95b1091fe2736ab13b6a1f551
SHA1 hash:
fad4a1f0c7762dcfb1f89dc748d829adf04d1c08
Detections:
SUSP_OBF_NET_ConfuserEx_Name_Pattern_Jan24
Create hunting rule
Link:
https://www.unpac.me/results/1dca7c29-8a52-4f45-8e4e-f07d455dd22c/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/a6f06cc81ea1/report/overview.html
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: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

File information

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

Malspam

Formbook

Executable exe a6f06cc81ea1f32259b6d9f45e3bd8b5ceef83c78041cf87a0acde5d3fc1a5ea

(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 (HIGH_ENTROPY_VA)high

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