MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c4b6e4bd4131eaa2fba28259570135346ea35a90bf271bab1560f019550698fd. 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: 15


Intelligence 15 IOCs YARA 7 File information Comments
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SHA256 hash: c4b6e4bd4131eaa2fba28259570135346ea35a90bf271bab1560f019550698fd
SHA3-384 hash: 2a58ab7acddad59cc067a2d46848d25813170c247ea01d250ef5c269ca9b533990f55aa2bf6b04b5d723c8a1b78bc4e9
SHA1 hash: bff983416a08dfaa03e06899f1f38f0fb81a6549
MD5 hash: 32c8968f0c4a7729f9d77e64754a1adc
humanhash: beer-stream-dakota-oxygen
File name:Om15eLtJ8qVFiGX.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:627'208 bytes
First seen:2024-04-30 05:34:04 UTC
Last seen:2024-04-30 06:37:40 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'661 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:qeaB778QPGBU9HFbUqymu2OtCoAwLDVn83rwVQbkR:PaBlmAFAqvubsHuDWUV/
Threatray 641 similar samples on MalwareBazaar
TLSH T11ED423C972DC5BB2FE9E4EB209E4D4092BB2B1052BF0D76919D970C5ACE3BE04131D96
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)
File icon (PE):PE icon
dhash icon 4018f9e960e20464 (19 x AgentTesla, 6 x Formbook, 2 x PureLogsStealer)
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
303
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
c4b6e4bd4131eaa2fba28259570135346ea35a90bf271bab1560f019550698fd.exe
Verdict:
Malicious activity
Analysis date:
2024-04-30 05:36:21 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/fdbc91af-1e90-4efc-8fde-b9380b78c437

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Porcupine.Malware.58887.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Unauthorized injection to a recently created process
Restart of the analyzed sample
Creating a file
Launching a process
Сreating synchronization primitives
Launching cmd.exe command interpreter
Setting browser functions hooks
Unauthorized injection to a system process
Unauthorized injection to a browser process
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/c4b6e4bd4131eaa2fba28259570135346ea35a90bf271bab1560f019550698fd
Malware family:
Formbook
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/ca9283b2-fa09-4c2e-8457-74093bc3b9f6
Result
Threat name:
FormBook, PureLog Stealer
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1433828
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for submitted file
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Script Initiated Connection to Non-Local Network
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM3
Yara detected FormBook
Yara detected PureLog Stealer
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1433828 Sample: Om15eLtJ8qVFiGX.exe Startdate: 30/04/2024 Architecture: WINDOWS Score: 100 27 www.6891ybfh.xyz 2->27 29 www.wnkj001.site 2->29 31 10 other IPs or domains 2->31 39 Snort IDS alert for network traffic 2->39 41 Found malware configuration 2->41 43 Malicious sample detected (through community Yara rule) 2->43 47 13 other signatures 2->47 10 Om15eLtJ8qVFiGX.exe 3 2->10         started        signatures3 45 Performs DNS queries to domains with low reputation 27->45 process4 signatures5 59 Tries to detect virtualization through RDTSC time measurements 10->59 61 Injects a PE file into a foreign processes 10->61 13 Om15eLtJ8qVFiGX.exe 10->13         started        16 conhost.exe 10->16         started        process6 signatures7 63 Modifies the context of a thread in another process (thread injection) 13->63 65 Maps a DLL or memory area into another process 13->65 67 Sample uses process hollowing technique 13->67 69 Queues an APC in another process (thread injection) 13->69 18 explorer.exe 55 1 13->18 injected process8 dnsIp9 33 reddcrownexpress.com 45.88.201.15, 49749, 80 DMITUS Switzerland 18->33 35 www.wltk.site 154.3.0.219, 49746, 80 COGENT-174US United States 18->35 37 5 other IPs or domains 18->37 49 System process connects to network (likely due to code injection or exploit) 18->49 22 wscript.exe 12 18->22         started        signatures10 process11 signatures12 51 System process connects to network (likely due to code injection or exploit) 22->51 53 Modifies the context of a thread in another process (thread injection) 22->53 55 Maps a DLL or memory area into another process 22->55 57 Tries to detect virtualization through RDTSC time measurements 22->57 25 cmd.exe 1 22->25         started        process13
Score:
99%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/c4b6e4bd4131eaa2fba28259570135346ea35a90bf271bab1560f019550698fd
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/c4b6e4bd4131eaa2fba28259570135346ea35a90bf271bab1560f019550698fd/
Threat name:
ByteCode-MSIL.Trojan.Taskun
Create hunting rule
Status:
Malicious
First seen:
2024-04-29 04:16:53 UTC
File Type:
PE (.Net Exe)
Extracted files:
9
AV detection:
18 of 23 (78.26%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ys3ojpkbghvkf65cqjmvoajvgrxkgwuqx4trxkyvmdybsvigtd6q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
13e8e9cf97e4d1357797ef4253db3c784ef8dbf39725214f1b174991c0e1ae4d
Formbook
19b86526b9c8b33ee230bba95c8a02fc47db4d230933c3ebcb6888e0dd344f77
Formbook
4850a766fab45d5947075658d9c6bbf4b970f0d05b082c1472b93d9a7fa3d093
Formbook
6465b2c5702a723c7229e33fdf38676e3b0e0049b5b632e2fe6e210713f6a7e7
Formbook
82c1419745039317e766c286be49ff600cf0e98c24545a2e62fc0cf57dabc255
Formbook
864b5669f18681ae03edbd7c3b3bbf6732e55191d4883f18783eb9c611fa9a17
Formbook
87698c1e19d65ae8f35f18b98690093601458944fe6317009f884c4e3b2a4842
Formbook
ad896a8982941cd8a7b4f237f775e712dc1a05cfb2d80601d45f4cc73475ecc0
Formbook
bddecf330d5b3d2c09db0b26dc6367e2e71a2e0317cc65610cd1cca8809fd0e2
Formbook
f6723f25605e46b8bdd2a8a875ee319c40108491934b2f8fbcdd58d649cbc651
Formbook
+ 631 additional samples on MalwareBazaar
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:be03 rat spyware stealer trojan
Link:
https://tria.ge/reports/240430-f91t6seb6z/
Behaviour
Gathers network information
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Deletes itself
Formbook payload
Formbook
Unpacked files
SH256 hash:
5b6088011ffd5987d7865e80b4beffb0956de30e9302c4e02967cd3db015c764
MD5 hash:
d4ba0da7424479013329b0c45f055acf
SHA1 hash:
a5cb4377e88ba0de340ad2a9a18bf5dae543b2fd
Detections:
FormBook
Create hunting rule
win_formbook_w0
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Formbook
Create hunting rule
Link:
https://www.unpac.me/results/f80cccdf-6f13-4484-b309-917101f8d626/
Parent samples :
864b5669f18681ae03edbd7c3b3bbf6732e55191d4883f18783eb9c611fa9a17
6465b2c5702a723c7229e33fdf38676e3b0e0049b5b632e2fe6e210713f6a7e7
13e8e9cf97e4d1357797ef4253db3c784ef8dbf39725214f1b174991c0e1ae4d
c4b6e4bd4131eaa2fba28259570135346ea35a90bf271bab1560f019550698fd
e5435dd5c1dab1fd1a738ddf914ea9af64e89daa4b141b3075f53f0960805dbe
SH256 hash:
580ef9d00e320c821e654d883987185b0159ec5f967a72c708e39f96754a21b8
MD5 hash:
a4601fd39dd947a4d379c492364ef193
SHA1 hash:
edf9f917dd7bd42fe1cd3a92acf631266f5a5d15
Link:
https://www.unpac.me/results/f80cccdf-6f13-4484-b309-917101f8d626/
SH256 hash:
edcbb732688d584a35bdef5d13738e43097829eb4bb31e5071139117bf5fdb62
MD5 hash:
df658a67ee0502cdd7518ff77001c461
SHA1 hash:
1a49cf256efbabbe6ce60ee28535c12ef5bf6612
Link:
https://www.unpac.me/results/f80cccdf-6f13-4484-b309-917101f8d626/
SH256 hash:
8213a6a34c36db37675298dcbbbb36451ddf233c1af7e8783be225d3e4c08271
MD5 hash:
a2f5dafc17432fdea2f85c9c972167ca
SHA1 hash:
004139faa5268e3fd9fcc92710d0e331d32a2d7b
Link:
https://www.unpac.me/results/f80cccdf-6f13-4484-b309-917101f8d626/
SH256 hash:
c4b6e4bd4131eaa2fba28259570135346ea35a90bf271bab1560f019550698fd
MD5 hash:
32c8968f0c4a7729f9d77e64754a1adc
SHA1 hash:
bff983416a08dfaa03e06899f1f38f0fb81a6549
Detections:
INDICATOR_KB_CERT_7c1118cbbadc95da3752c46e47a27438
Create hunting rule
Link:
https://www.unpac.me/results/f80cccdf-6f13-4484-b309-917101f8d626/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/c4b6e4bd4131/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/c4b6e4bd4131eaa2fba28259570135346ea35a90bf271bab1560f019550698fd

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:INDICATOR_KB_CERT_7c1118cbbadc95da3752c46e47a27438
Create hunting rule
Author:ditekSHen
Description:Detects executables signed with stolen, revoked or invalid certificates
Rule name:NET
Create hunting rule
Author:malware-lu
Rule name:NETexecutableMicrosoft
Create hunting rule
Author:malware-lu
Rule name:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
Rule name:pe_imphash
Create hunting rule
Rule name:PE_Potentially_Signed_Digital_Certificate
Create hunting rule
Author:albertzsigovits
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.

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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