MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b1ca66c8cc7404a8093a85dc99ba848d7b4b307e463dd930ec91c509e1e81df2. 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: 12


Intelligence 12 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b1ca66c8cc7404a8093a85dc99ba848d7b4b307e463dd930ec91c509e1e81df2
SHA3-384 hash: 0f9ae4977a425407b1a78209e9f465bcd0ad06edf6e08eceea374a20a5be84a869d40b9429f8a8e526c9d03b1c93b277
SHA1 hash: 97ba323d41b125a63f7351aec41a0831a6450fd1
MD5 hash: 3c7e962b0a10cdb5cc5de42bc2e29d5d
humanhash: september-equal-vermont-grey
File name:OPEN BALANCE.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:770'560 bytes
First seen:2024-07-26 07:28:41 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 21371b611d91188d602926b15db6bd48 (61 x Formbook, 23 x AgentTesla, 20 x RemcosRAT)
ssdeep 12288:OsHzOUNUSB/o5LsI1uwajJ5yvv1l2y8PvYrVMjA4LhaZOtx2nngTmp0jmkPlsZc:xiUmSB/o5d1ubcv2YOjA46jnnB0KkyC
TLSH T116F423269580DC05C17163B4C476CEA09ABAB130DEC87777DB91E39EE432352E817A7E
TrID 39.1% (.EXE) UPX compressed Win32 Executable (27066/9/6)
38.3% (.EXE) Win32 EXE Yoda's Crypter (26569/9/4)
7.2% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.5% (.EXE) Win32 Executable (generic) (4504/4/1)
2.9% (.EXE) OS/2 Executable (generic) (2029/13)
File icon (PE):PE icon
dhash icon aae2f3e38383b629 (2'034 x Formbook, 1'183 x CredentialFlusher, 666 x AgentTesla)
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
343
Origin country :
DE DE
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Trojan.Win32.AgentTesla.13683.23123.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
99.1%
Link:
https://cyber-fortress.com/docs/result/index.php?id=66a35170458e130e002a9812
Tags:
Network Stealth Shellcodecrypter
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Creating a file in the %temp% directory
Launching a process
Сreating synchronization primitives
Unauthorized injection to a system process
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.
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/d5264349-0fa7-4038-b9da-cffece98dd42
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1482866
Signature
AI detected suspicious sample
Binary is likely a compiled AutoIt script file
Found API chain indicative of sandbox detection
Found direct / indirect Syscall (likely to bypass EDR)
Initial sample is a PE file and has a suspicious name
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 submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
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)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1482866 Sample: OPEN BALANCE.exe Startdate: 26/07/2024 Architecture: WINDOWS Score: 100 28 www.worldheadline.xyz 2->28 30 www.counseloratlaw1806.xyz 2->30 32 11 other IPs or domains 2->32 42 Malicious sample detected (through community Yara rule) 2->42 44 Multi AV Scanner detection for submitted file 2->44 46 Yara detected FormBook 2->46 50 6 other signatures 2->50 10 OPEN BALANCE.exe 4 2->10         started        signatures3 48 Performs DNS queries to domains with low reputation 30->48 process4 signatures5 62 Binary is likely a compiled AutoIt script file 10->62 64 Writes to foreign memory regions 10->64 66 Maps a DLL or memory area into another process 10->66 13 svchost.exe 10->13         started        process6 signatures7 68 Maps a DLL or memory area into another process 13->68 16 VnZdrTcLqvUA.exe 13->16 injected process8 signatures9 40 Found direct / indirect Syscall (likely to bypass EDR) 16->40 19 attrib.exe 13 16->19         started        process10 signatures11 52 Tries to steal Mail credentials (via file / registry access) 19->52 54 Tries to harvest and steal browser information (history, passwords, etc) 19->54 56 Modifies the context of a thread in another process (thread injection) 19->56 58 3 other signatures 19->58 22 VnZdrTcLqvUA.exe 19->22 injected 26 firefox.exe 19->26         started        process12 dnsIp13 34 worldheadline.xyz 192.236.177.190, 49713, 80 HOSTWINDSUS United States 22->34 36 www.counseloratlaw1806.xyz 199.59.243.226, 49732, 49733, 49734 BODIS-NJUS United States 22->36 38 6 other IPs or domains 22->38 60 Found direct / indirect Syscall (likely to bypass EDR) 22->60 signatures14
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/b1ca66c8cc7404a8093a85dc99ba848d7b4b307e463dd930ec91c509e1e81df2
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b1ca66c8cc7404a8093a85dc99ba848d7b4b307e463dd930ec91c509e1e81df2/
Threat name:
Win32.Trojan.Strab
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Status:
Malicious
First seen:
2024-07-25 13:36:30 UTC
File Type:
PE (Exe)
Extracted files:
52
AV detection:
20 of 24 (83.33%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=whfgnsgmoqckqcj2qxojtouerv5uwmd6iy65smhmshcqtypidxza._file
Verdict:
malicious
Label(s):
formbook
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Result
Malware family:
n/a
Score:
  7/10
Tags:
discovery upx
Link:
https://tria.ge/reports/240726-ja882sxfqg/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
AutoIT Executable
Suspicious use of SetThreadContext
UPX packed file
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/c8385bf7-a177-4fd9-87b9-cde236e0b126
Unpacked files
SH256 hash:
d6730ded7461b6237532af130a0b6cb5fe5346eea4202bedbe6bd7518acd7a0c
MD5 hash:
082b1a330fc7a102ba257ae5d0cf53ba
SHA1 hash:
3650fb0971c519d3bfdfc7963ed06edec2534cfb
Detections:
win_formbook_g0
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win_formbook_w0
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Link:
https://www.unpac.me/results/b5dafef3-c0b7-4fd6-8533-70bc53be668a/
SH256 hash:
09e94f3a8435f1f7e68b5309590b60da1d0d8a60a05819829d02f714ca1fa9ff
MD5 hash:
dff35f88d271917d93a84dc83cca7da9
SHA1 hash:
4c425501b453f8431f44339ad4f2745271d16afe
Link:
https://www.unpac.me/results/b5dafef3-c0b7-4fd6-8533-70bc53be668a/
SH256 hash:
e00d96eb31268fa8072d7db8b310f20c8ef2921d1afbffbf0917aba9f38f4486
MD5 hash:
5af59fcf6a592afd12268ff94d151c5d
SHA1 hash:
9e0a5de8fcfd97d09abc668c4392682e2bb6d7e9
Detections:
AutoIT_Compiled
Create hunting rule
Link:
https://www.unpac.me/results/b5dafef3-c0b7-4fd6-8533-70bc53be668a/
SH256 hash:
b1ca66c8cc7404a8093a85dc99ba848d7b4b307e463dd930ec91c509e1e81df2
MD5 hash:
3c7e962b0a10cdb5cc5de42bc2e29d5d
SHA1 hash:
97ba323d41b125a63f7351aec41a0831a6450fd1
Link:
https://www.unpac.me/results/b5dafef3-c0b7-4fd6-8533-70bc53be668a/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b1ca66c8cc74/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b1ca66c8cc7404a8093a85dc99ba848d7b4b307e463dd930ec91c509e1e81df2

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:UPXV200V290MarkusOberhumerLaszloMolnarJohnReiser
Create hunting rule
Author:malware-lu
Rule name:upx_largefile
Create hunting rule
Author:k3nr9

File information

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

Malspam

Formbook

Executable exe b1ca66c8cc7404a8093a85dc99ba848d7b4b307e463dd930ec91c509e1e81df2

(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
CHECK_NXMissing Non-Executable Memory Protectioncritical
Reviews
IDCapabilitiesEvidence
AUTH_APIManipulates User AuthorizationADVAPI32.dll::GetAce
MULTIMEDIA_APICan Play MultimediaWINMM.dll::timeGetTime
WIN_BASE_APIUses Win Base APIKERNEL32.DLL::LoadLibraryA

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