MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4e25735dc713c78458f181caa0f09a6ea2ca79a708a3b22f52d1c936806de251. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4e25735dc713c78458f181caa0f09a6ea2ca79a708a3b22f52d1c936806de251
SHA3-384 hash: 27cdc5d891a0d467b13ca3612c8ef4fa7b49249d2866ae880ee1c68037168afdb64da1dcf284b35e4e0e99e2f9a03075
SHA1 hash: 26417afefaabd707dae65d9fdd84178f4fb5e112
MD5 hash: e87b10b098df8ff5906cb1154c78e83d
humanhash: spring-fish-magnesium-carpet
File name:e87b10b098df8ff5906cb1154c78e83d.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:610'304 bytes
First seen:2021-10-27 12:31:02 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 12288:ys81qJFTPspzV12K0JUJ90MtGI/F/KukflAI2B:ys81qopJl0JcaQGI9KuSl2
Threatray 10'846 similar samples on MalwareBazaar
TLSH T1B0D4D03212B9AF49ED3E9FB8082130800FF77517D76DC24ABFE950D516E3A518E36992
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
107
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/200531/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Using the Windows Management Instrumentation requests
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/61794689a9d585e6d53b317d/reports/d6dcd300-ce22-48de-a6ef-d74a2dc7f137/overview
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/60c9db4a-024b-4047-943a-8017dd64a321
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/877769
Signature
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 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)
Modifies the prolog of user mode functions (user mode inline hooks)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Sigma detected: Suspect Svchost Activity
Sigma detected: Suspicious Svchost Process
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
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 signatures2 2 Behavior Graph ID: 510202 Sample: Tfwyelel3H.exe Startdate: 27/10/2021 Architecture: WINDOWS Score: 100 42 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->42 44 Found malware configuration 2->44 46 Malicious sample detected (through community Yara rule) 2->46 48 12 other signatures 2->48 10 Tfwyelel3H.exe 6 2->10         started        process3 file4 36 C:\Users\user\AppData\...\DDGuFdDkUBuPOY.exe, PE32 10->36 dropped 38 C:\Users\user\AppData\...\Tfwyelel3H.exe.log, ASCII 10->38 dropped 52 Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines) 10->52 54 Uses schtasks.exe or at.exe to add and modify task schedules 10->54 56 Tries to detect virtualization through RDTSC time measurements 10->56 58 Injects a PE file into a foreign processes 10->58 14 Tfwyelel3H.exe 10->14         started        17 schtasks.exe 1 10->17         started        19 BackgroundTransferHost.exe 49 10->19         started        21 Tfwyelel3H.exe 10->21         started        signatures5 process6 signatures7 68 Modifies the context of a thread in another process (thread injection) 14->68 70 Maps a DLL or memory area into another process 14->70 72 Sample uses process hollowing technique 14->72 74 Queues an APC in another process (thread injection) 14->74 23 explorer.exe 14->23 injected 27 conhost.exe 17->27         started        process8 dnsIp9 40 www.collectcuriously.com 192.64.119.254, 49831, 80 NAMECHEAP-NETUS United States 23->40 50 System process connects to network (likely due to code injection or exploit) 23->50 29 svchost.exe 23->29         started        signatures10 process11 signatures12 60 Self deletion via cmd delete 29->60 62 Modifies the context of a thread in another process (thread injection) 29->62 64 Maps a DLL or memory area into another process 29->64 66 Tries to detect virtualization through RDTSC time measurements 29->66 32 cmd.exe 1 29->32         started        process13 process14 34 conhost.exe 32->34         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/4e25735dc713c78458f181caa0f09a6ea2ca79a708a3b22f52d1c936806de251/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-10-27 12:31:10 UTC
AV detection:
20 of 27 (74.07%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
125a3d1084a3f13ca811f5fbecdbade8d6e2b2c5d73a686674c6ff244ec99f68
Formbook
4ce42b0b74090b13a3a1692caeabfd4df748e8fa0220ba1342765fe56b399348
Formbook
55ed65b48cb66c266459b4bbe35faecbc6c7737a1d89d9df884152c292b4b762
Formbook
7903434967ec18733812c4bdd4acdff871bfff5ce40528442272cf230822dd10
Formbook
b66060a214c372ff66b8917fee39b5cb6c82972cf7cdfcd64b9ae4b7b7e01bf7
Formbook
f66cc04ceebc1bc6084983064372bbfb7f0c5c80f36a911cbc78ff2250cf9667
Formbook
fedeb19031bcc0941b0943dd3ed45ee6095b8c489c072c85e513b414abf8acf5
Formbook
ff64ff314c7947e5faae8181ac818b124a6d17d0fc3a66e8777a78a613d6093c
Formbook
+ 10'836 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:hs3h evasion rat spyware stealer trojan
Link:
https://tria.ge/reports/211027-pp2qeaegb3/
Behaviour
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Maps connected drives based on registry
Checks BIOS information in registry
Looks for VMWare Tools registry key
Formbook Payload
Looks for VirtualBox Guest Additions in registry
Formbook
Malware Config
C2 Extraction:
http://www.alefisrael.com/hs3h/
Unpacked files
SH256 hash:
3fdc3e95250a85b401fd290a36949ab2b65a68e87f14840cee11298563277cac
MD5 hash:
25a22d0c20252efdee71059d52299e60
SHA1 hash:
e8fe27788212e6154332bc769e00b13f6653b322
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/ed439c59-ab31-40b9-8f97-f0e7fc2e204a/
Parent samples :
f66cc04ceebc1bc6084983064372bbfb7f0c5c80f36a911cbc78ff2250cf9667
f083c960cd2083e99fce5c4546a4732b63500fac38c201fd90d73d6d762204ab
7903434967ec18733812c4bdd4acdff871bfff5ce40528442272cf230822dd10
4ce42b0b74090b13a3a1692caeabfd4df748e8fa0220ba1342765fe56b399348
4e25735dc713c78458f181caa0f09a6ea2ca79a708a3b22f52d1c936806de251
63ff4d686692c112bd815c4b1d6c61c397909ad53f160981af6f3fb0e97bebc2
SH256 hash:
43e38f251dbca9aa20f3470167e5427a7e7a7cdcd25f0b6b045ae8577cd3e345
MD5 hash:
f62ab5d3528d5a3b9e270ea1f9347868
SHA1 hash:
6a74e87711c615adbd9145f829a33f55b7e42dd6
Link:
https://www.unpac.me/results/ed439c59-ab31-40b9-8f97-f0e7fc2e204a/
SH256 hash:
15ef845d324512e5d9b4df3a50df3342300a6ecf5da77eeaf3a0ad6538ecda7a
MD5 hash:
ef075f793b87265d8ed90db549ee58b4
SHA1 hash:
1ff79848bf552257f58b447ee9c490004310bb67
Link:
https://www.unpac.me/results/ed439c59-ab31-40b9-8f97-f0e7fc2e204a/
SH256 hash:
4e25735dc713c78458f181caa0f09a6ea2ca79a708a3b22f52d1c936806de251
MD5 hash:
e87b10b098df8ff5906cb1154c78e83d
SHA1 hash:
26417afefaabd707dae65d9fdd84178f4fb5e112
Link:
https://www.unpac.me/results/ed439c59-ab31-40b9-8f97-f0e7fc2e204a/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/4e25735dc713/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/4e25735dc713c78458f181caa0f09a6ea2ca79a708a3b22f52d1c936806de251

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: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.

Web download

Formbook

Executable exe 4e25735dc713c78458f181caa0f09a6ea2ca79a708a3b22f52d1c936806de251

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1719378/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/200531/

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