MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 3c49acaa8cecf8350267f1be98a72b3c3cc0ab537c0ddb99b20cb6d7e65b916b. 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: 19


Intelligence 19 IOCs YARA 5 File information Comments
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SHA256 hash: 3c49acaa8cecf8350267f1be98a72b3c3cc0ab537c0ddb99b20cb6d7e65b916b
SHA3-384 hash: 7771d975d699fa06618c8d474f5555bc60ac77fe0898d5079af46360c4a4ec3153087bc5083459c5c8377b26d28d8be2
SHA1 hash: 1e6f09bbb822019d3311f317688756d48d0d931a
MD5 hash: cf4274ca7587295567c667da6e1bd0e0
humanhash: thirteen-alanine-earth-neptune
File name:KvG1NAXkgp9PxQb.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:711'168 bytes
First seen:2024-12-03 13:05:58 UTC
Last seen:2025-01-10 14:31:58 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'810 x AgentTesla, 19'731 x Formbook, 12'280 x SnakeKeylogger)
ssdeep 12288:diIR4R52J+XtONxhwH7L8US0zA50ziWjBoAOIFSDhmAfUq/Wy9jwW7i5IjlMIR:diIeeDNwH7o+cW9oAbtAMq+y9GI
TLSH T15FE4E19C3A01B14FC807C5358EA1FD746A586DEE970793139AD72EEFF81E8568E041E2
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
File icon (PE):PE icon
dhash icon e44ad8ccc8a4a0c0 (22 x Formbook, 4 x RemcosRAT, 3 x AgentTesla)
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
389
Origin country :
NL NL
Vendor Threat Intelligence
Malware family:
formbook
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ID:
1
File name:
KvG1NAXkgp9PxQb.exe
Verdict:
Malicious activity
Analysis date:
2024-12-03 13:37:37 UTC
Tags:
formbook xloader
Link:
https://app.any.run/tasks/f83eaa03-11fb-4950-9542-472963d4aeed

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection(s):
Win.Packed.Ratx-10038422-0
Create hunting rule

Verdict:
Malicious
Score:
90.9%
Link:
https://cyber-fortress.com/docs/result/index.php?id=674f033e12e85e185e754cb5
Tags:
virus gates msil
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 the process to change network settings
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:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed packed packer_detected
Link:
https://www.filescan.io/uploads/674f0251e5f10467692923ec/reports/a0b58ecc-29ac-4bc4-a31f-70c8e14224e6/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/3c49acaa8cecf8350267f1be98a72b3c3cc0ab537c0ddb99b20cb6d7e65b916b
Malware family:
Formbook
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/b831f5e2-3940-4c70-b1cd-88988d29bbf8
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1567390
Signature
.NET source code contains potential unpacker
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Found direct / indirect Syscall (likely to bypass EDR)
Found malware configuration
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
Switches to a custom stack to bypass stack traces
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1567390 Sample: KvG1NAXkgp9PxQb.exe Startdate: 03/12/2024 Architecture: WINDOWS Score: 100 29 www.eecshop.xyz 2->29 31 www.yslagfhlp.online 2->31 33 3 other IPs or domains 2->33 35 Found malware configuration 2->35 37 Malicious sample detected (through community Yara rule) 2->37 39 Multi AV Scanner detection for submitted file 2->39 43 7 other signatures 2->43 11 KvG1NAXkgp9PxQb.exe 3 2->11         started        signatures3 41 Performs DNS queries to domains with low reputation 29->41 process4 file5 27 C:\Users\user\...\KvG1NAXkgp9PxQb.exe.log, ASCII 11->27 dropped 53 Tries to detect virtualization through RDTSC time measurements 11->53 55 Switches to a custom stack to bypass stack traces 11->55 15 KvG1NAXkgp9PxQb.exe 11->15         started        signatures6 process7 signatures8 57 Modifies the context of a thread in another process (thread injection) 15->57 59 Maps a DLL or memory area into another process 15->59 61 Sample uses process hollowing technique 15->61 63 2 other signatures 15->63 18 explorer.exe 42 1 15->18 injected process9 process10 20 control.exe 18->20         started        signatures11 45 Modifies the context of a thread in another process (thread injection) 20->45 47 Maps a DLL or memory area into another process 20->47 49 Tries to detect virtualization through RDTSC time measurements 20->49 51 Switches to a custom stack to bypass stack traces 20->51 23 cmd.exe 1 20->23         started        process12 process13 25 conhost.exe 23->25         started       
Score:
100%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/3c49acaa8cecf8350267f1be98a72b3c3cc0ab537c0ddb99b20cb6d7e65b916b
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/3c49acaa8cecf8350267f1be98a72b3c3cc0ab537c0ddb99b20cb6d7e65b916b/
Threat name:
ByteCode-MSIL.Spyware.AsyncRAT
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Status:
Malicious
First seen:
2024-12-03 12:56:24 UTC
File Type:
PE (.Net Exe)
Extracted files:
7
AV detection:
19 of 24 (79.17%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=hre2zkum5t4dkath6g7jrjzlhq6mbk2tpqg5xgnsbs3npzs3sfvq._file
Verdict:
malicious
Label(s):
formbook
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unknown_loader_037
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Similar samples:
error
Formbook
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:ax19 discovery rat spyware stealer trojan
Link:
https://tria.ge/reports/241203-qb3k8askaj/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
System Location Discovery: System Language Discovery
Suspicious use of SetThreadContext
Deletes itself
Formbook payload
Formbook
Formbook family
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Link:
https://app.threat.zone/submission/bf04f4a4-cf44-4974-9ae1-4fbb885c50e5
Unpacked files
SH256 hash:
b290019be57897b0da8a90ec2edaf89ce4336b61a1466dab7e12148a6811dd2c
MD5 hash:
5a2e3743e92606038c95d79424f1b6f6
SHA1 hash:
d6bd9b38b81b168ca8a876da4f419e1f49b2e13f
Detections:
FormBook
Create hunting rule
win_formbook_auto
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win_formbook_g0
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win_formbook_w0
Create hunting rule
Formbook
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Windows_Trojan_Formbook
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Link:
https://www.unpac.me/results/05759868-e9cd-4f43-9161-4914314656db/
Parent samples :
3c49acaa8cecf8350267f1be98a72b3c3cc0ab537c0ddb99b20cb6d7e65b916b
863062f983aac165c04b1af4ce761865b4fd734b71de85e0aba00c112febac2b
SH256 hash:
099d5c938394b695a20d1f62f42922c97d739af3661106ad47a901aae28d807b
MD5 hash:
5c09273b134038a3df192d1ca24f507e
SHA1 hash:
b9752122ba9972281616498751c11f5d2ce18779
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/05759868-e9cd-4f43-9161-4914314656db/
SH256 hash:
acf09c80699691d3a6a8d52577d06a7054c1bda1953a55527251e92e15ba037f
MD5 hash:
69473b5123488cff4aae599aa14eb3a4
SHA1 hash:
1d3562fd2fb55582cb97441b9f01065dd80373fc
Link:
https://www.unpac.me/results/05759868-e9cd-4f43-9161-4914314656db/
SH256 hash:
3c49acaa8cecf8350267f1be98a72b3c3cc0ab537c0ddb99b20cb6d7e65b916b
MD5 hash:
cf4274ca7587295567c667da6e1bd0e0
SHA1 hash:
1e6f09bbb822019d3311f317688756d48d0d931a
Link:
https://www.unpac.me/results/05759868-e9cd-4f43-9161-4914314656db/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/3c49acaa8cec/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/3c49acaa8cecf8350267f1be98a72b3c3cc0ab537c0ddb99b20cb6d7e65b916b

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:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:Sus_Obf_Enc_Spoof_Hide_PE
Create hunting rule
Author:XiAnzheng
Description:Check for Overlay, Obfuscating, Encrypting, Spoofing, Hiding, or Entropy Technique(can create FP)

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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