MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5bc9d0c8fd02f1c138178b1291378304a653717076f9e12ba4334609dcf7b11c. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 5bc9d0c8fd02f1c138178b1291378304a653717076f9e12ba4334609dcf7b11c
SHA3-384 hash: df8f0a5cc567101227a1135990f2873f85b6bee547848ed1820d478fc27601525ab429e433dd27f26bb852291b763370
SHA1 hash: 358c3f58194ccc713f000e194024b817f6cb5320
MD5 hash: de5ca69a7939c4a8ce6846463990aa7b
humanhash: finch-nebraska-pluto-hot
File name:K.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:740'864 bytes
First seen:2021-09-06 05:20:38 UTC
Last seen:2021-09-06 13:47:20 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:PxTEgx9h1GicKzIfOJtHQgXSFJJucyM/+IQVQCU20v9X4g8p9U7hZePuxQJPmEqw:qoL1GhIIfQV1SzyM2IQinD9XF
Threatray 9'124 similar samples on MalwareBazaar
TLSH T1F0F44A9C3210759EC957D8368E64DC74AB206CAA530BD213A0E32DDFBA5DA97DF101F2
Reporter GovCERT_CH
Tags:exe FormBook xloader

Intelligence

File Origin
# of uploads :
2
# of downloads :
244
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
K.exe
Verdict:
Malicious activity
Analysis date:
2021-09-06 05:21:58 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/71dac312-df2c-4819-a4ea-a2162395cc4c

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/185505/
Detection(s):
SecuriteInfo.com.ArtemisDE5CA69A7939.8415.8289.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file
Searching for the window
Launching a process
Sending a UDP request
Creating a window
Launching a service
Moving a recently created file
Creating a file in the Windows subdirectories
Creating a file in the system32 subdirectories
Launching cmd.exe command interpreter
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Unauthorized injection to a system process
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/16787f96-873f-43c0-9fdb-ffefe04ff619
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/845701
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
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)
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: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 478132 Sample: K.exe Startdate: 06/09/2021 Architecture: WINDOWS Score: 100 44 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->44 46 Found malware configuration 2->46 48 Malicious sample detected (through community Yara rule) 2->48 50 9 other signatures 2->50 9 K.exe 3 2->9         started        process3 file4 26 C:\Users\user\AppData\Local\...\K.exe.log, ASCII 9->26 dropped 52 Writes to foreign memory regions 9->52 54 Allocates memory in foreign processes 9->54 56 Injects a PE file into a foreign processes 9->56 13 RegSvcs.exe 9->13         started        signatures5 process6 signatures7 58 Modifies the context of a thread in another process (thread injection) 13->58 60 Maps a DLL or memory area into another process 13->60 62 Sample uses process hollowing technique 13->62 64 2 other signatures 13->64 16 control.exe 13->16         started        19 explorer.exe 13->19 injected process8 dnsIp9 34 Modifies the context of a thread in another process (thread injection) 16->34 36 Maps a DLL or memory area into another process 16->36 38 Tries to detect virtualization through RDTSC time measurements 16->38 22 cmd.exe 1 16->22         started        28 www.nstaq-labs.com 85.128.131.76, 80 NAZWAPL Poland 19->28 30 vertexnailsblaine.com 173.214.164.249, 49716, 80 IS-AS-1US United States 19->30 32 8 other IPs or domains 19->32 40 System process connects to network (likely due to code injection or exploit) 19->40 42 Performs DNS queries to domains with low reputation 19->42 signatures10 process11 process12 24 conhost.exe 22->24         started       
Detection:
xloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/5bc9d0c8fd02f1c138178b1291378304a653717076f9e12ba4334609dcf7b11c/
Threat name:
Win32.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-09-06 03:12:42 UTC
AV detection:
10 of 43 (23.26%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=lpe5bsh5aly4coaxrmjjcn4dastfg4lqo346ck5egndatxhxweoa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
0b83d5ad9e2be0ecb6ea6d4228a1d41a6be6de3d0027729c1e0ef15789ed1e3c
Formbook
5e5f76b60e8eb895e5af44be8ce40f88b77a44840851f761e6818da652ae5cac
Formbook
6db6324fe282260a224e77fff9bdad3240a63d48ac587f2a701785ea69c317a5
Formbook
76a9d850411a7418f464266168a7df679b4fa00934649ed2e509156aa2875be2
Formbook
7af335cb2a2646ddadf12f730585a217523da868aaeb12ba621b367c1b942693
Formbook
aa9574014df2ac3fe4c9f8e32c45197542377ea99805665bcb0b4258df36adda
Formbook
ab4795f656b54e9388c89d6a4df52747510fa418bdb50aa3bafd7b332ef1ff81
Formbook
+ 9'114 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:t75f loader rat
Link:
https://tria.ge/reports/210906-f114ksabf6/
Behaviour
Gathers network information
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Xloader Payload
Xloader
Malware Config
C2 Extraction:
http://www.vertexnailsblaine.com/t75f/
Unpacked files
SH256 hash:
034c645316c78acb2b9110f9bfd8b840b981489bab385e8c39912ec5c7c4f1c9
MD5 hash:
d17b3ace9f0ca124101674d27328cbf6
SHA1 hash:
8ed2472b79df133a2d6cc73cbed726c444b91bff
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/5b75175e-b56c-4a0f-8a3d-c6da87df7465/
Parent samples :
7af335cb2a2646ddadf12f730585a217523da868aaeb12ba621b367c1b942693
5bc9d0c8fd02f1c138178b1291378304a653717076f9e12ba4334609dcf7b11c
c840ee368fcab5974485c16fc456b1dc1923cc5e113ce6a96f6f314a7ec5ac94
34f75f8458b1f58bdb1e8ff1a46270f98c6d246d213413cd0c4a7708e15e82c9
4a91d8f52d07bcd7fde157c6b56e2881c4abba94a0f7921633da4ae2bba53074
43d831616e23a03c055971bc1c7c9ae0e87f491976e72ce8fa0074610f004488
SH256 hash:
c0ee1071e444f415f8b62856a0896f3b22e563f1bb4f03d14142583efe49a565
MD5 hash:
29db2e114b88ae1f6a00c9aa71690043
SHA1 hash:
ec82db71443556a5b320357b0b8b09e70ec1db9c
Link:
https://www.unpac.me/results/5b75175e-b56c-4a0f-8a3d-c6da87df7465/
SH256 hash:
547fd9da34db38b72d253a89ee74a1c35c878a75331356e6a339e3fe1345020e
MD5 hash:
d2d011fda0351f882addc7422f6aad14
SHA1 hash:
83b2f60c9352d60c41c9a7523a8683b5077a690d
Link:
https://www.unpac.me/results/5b75175e-b56c-4a0f-8a3d-c6da87df7465/
SH256 hash:
5bc9d0c8fd02f1c138178b1291378304a653717076f9e12ba4334609dcf7b11c
MD5 hash:
de5ca69a7939c4a8ce6846463990aa7b
SHA1 hash:
358c3f58194ccc713f000e194024b817f6cb5320
Link:
https://www.unpac.me/results/5b75175e-b56c-4a0f-8a3d-c6da87df7465/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/5bc9d0c8fd02/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.81
Link:
https://yomi.yoroi.company/submissions/5bc9d0c8fd02f1c138178b1291378304a653717076f9e12ba4334609dcf7b11c

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_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:pe_imphash
Create hunting rule
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 5bc9d0c8fd02f1c138178b1291378304a653717076f9e12ba4334609dcf7b11c

(this sample)

  
Dropped by
xloader
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/185505/

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