MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8e910fbfbf759e992ecc19c25080e7b16db746df5f559d3ba3ae887b857c11eb. 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 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8e910fbfbf759e992ecc19c25080e7b16db746df5f559d3ba3ae887b857c11eb
SHA3-384 hash: ebf697cb623370845f1fc27e26d9fd80de0fbcae51885bf7e33ac16c099be6c0da1a868c18ba9ea02b966db4ec6413d9
SHA1 hash: 2adaa4f6e1da47b04d9cd2ae50f4a002b35a1a49
MD5 hash: e248e3be4218496826756f87dd66f432
humanhash: illinois-salami-violet-yellow
File name:invoice.pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:472'064 bytes
First seen:2022-02-06 20:32:13 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'662 x AgentTesla, 19'474 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:b2NVO7J2zn7S5rVlNSOklrHYNz/MMAhmo9WTrQ0Ek:b2NVOVOWZNSOMYNQMamo7
Threatray 13'208 similar samples on MalwareBazaar
TLSH T12FA49DB4A0A78691F10B8974257CF9A102B231E3E9CA4D3917397641CFEEF583E8564F
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
219
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
invoice.pdf.exe
Verdict:
Malicious activity
Analysis date:
2022-02-06 20:37:18 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/0f0245ea-9447-4e48-a6ea-0d37ae3a61cc

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/233813/
Detection(s):
SecuriteInfo.com.PUA.EmbeddedEXE-1.UNOFFICIAL
Create hunting rule

Sanesecurity.Rogue.0hr.20220202-1502.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
DNS request
Unauthorized injection to a recently created process
Creating a file
Searching for synchronization primitives
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
fareit formbook obfuscated packed
Link:
https://www.filescan.io/uploads/62003082a72f86da69635ac3/reports/8df55b91-242e-4f5b-85ac-bda9c11eba8e/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.
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/1e7642d0-81f3-4297-8f6e-b2b0056c0b2e
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/934826
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Executable has a suspicious name (potential lure to open the executable)
Found malware configuration
Initial sample is a PE file and has a suspicious name
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
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Sigma detected: Suspicious Double Extension
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 an obfuscated file name to hide its real file extension (double extension)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 567304 Sample: invoice.pdf.exe Startdate: 06/02/2022 Architecture: WINDOWS Score: 100 32 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->32 34 Found malware configuration 2->34 36 Malicious sample detected (through community Yara rule) 2->36 38 11 other signatures 2->38 10 invoice.pdf.exe 3 2->10         started        process3 file4 28 C:\Users\user\AppData\...\invoice.pdf.exe.log, ASCII 10->28 dropped 50 Tries to detect virtualization through RDTSC time measurements 10->50 14 invoice.pdf.exe 10->14         started        signatures5 process6 signatures7 52 Modifies the context of a thread in another process (thread injection) 14->52 54 Maps a DLL or memory area into another process 14->54 56 Sample uses process hollowing technique 14->56 58 Queues an APC in another process (thread injection) 14->58 17 explorer.exe 14->17 injected process8 dnsIp9 30 www.choupomme.com 154.23.10.117, 49810, 80 COGENT-174US United States 17->30 40 System process connects to network (likely due to code injection or exploit) 17->40 21 control.exe 17->21         started        signatures10 process11 signatures12 42 Self deletion via cmd delete 21->42 44 Modifies the context of a thread in another process (thread injection) 21->44 46 Maps a DLL or memory area into another process 21->46 48 Tries to detect virtualization through RDTSC time measurements 21->48 24 cmd.exe 1 21->24         started        process13 process14 26 conhost.exe 24->26         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/8e910fbfbf759e992ecc19c25080e7b16db746df5f559d3ba3ae887b857c11eb/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-02-02 10:37:42 UTC
File Type:
PE (.Net Exe)
Extracted files:
6
AV detection:
29 of 43 (67.44%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=r2iq7p57owpjslwmdhbfbahhwfw3orw7l5kz2o5dv2ehxbl4chvq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
13ce54d053256ed33282cc8e8a47f9a3c83f9b96f4230df70a7b947c55c611f5
Formbook
441196ede1b9f192d9ad64790008befa64bc199129f721868adf864ab464984f
Formbook
79cb41c5d286b5e8062a31de81a893f221a8ea7bc887a74030b3802dbf5bc619
Formbook
95773ba387f93d567c9b0dd7e7c6a71e67e9545b146231c7acfc24d040fdd249
Formbook
96de11fc0f948fc3039f297475ba8abfcedaa7a9718634359286fe49156cd216
Formbook
9e6f627734e059c3e53c3c1f0211248969f412c652ea1819d83977dac47c7fa6
Formbook
a9ee744d7181c80db0ffbabf36933b815cf8b731ad6fb920393fb325cdfce9cc
Formbook
bcba0056c80d1a5c320dd74fea9caba51cc2f41c4d05215df1ab825a5ca10de4
Formbook
+ 13'198 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:fi46 rat spyware stealer trojan
Link:
https://tria.ge/reports/220206-zbt4hsbhb5/
Behaviour
Checks processor information in registry
Modifies data under HKEY_USERS
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Drops file in Windows directory
Suspicious use of SetThreadContext
Deletes itself
Formbook Payload
Formbook
Unpacked files
SH256 hash:
9f69e80be1c801708018ce3ec18439be39c75eafcc3bb7bdd22b179c9e8419b0
MD5 hash:
cf5a72ab2023890998e0345076f7c3ae
SHA1 hash:
5d1109ea28b9e2f84ac3206fbaaf4f6e95d6593a
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/8f37cbb7-a9f0-4e1f-80e9-031ec84f2e28/
Parent samples :
79cb41c5d286b5e8062a31de81a893f221a8ea7bc887a74030b3802dbf5bc619
8e910fbfbf759e992ecc19c25080e7b16db746df5f559d3ba3ae887b857c11eb
c48deffa7188f31de3b9347530cad3dee6b5f4a5afbe89c9e50629a6611bdec8
SH256 hash:
7ec78c2b6de3fc5e4024d49558051acb358b0d1920d50054dce82a592c12e8f2
MD5 hash:
e4798242cce476c8974ae04150106337
SHA1 hash:
e101900a0edb08a2fbc1cac794d2d8dcbaeae422
Link:
https://www.unpac.me/results/8f37cbb7-a9f0-4e1f-80e9-031ec84f2e28/
SH256 hash:
6f1b89bc3013177c101fe4448340c48c0dd08d19017a798bd11c2d0f76be1fbc
MD5 hash:
60a604887b3616e3ed86d81fab0a9ebb
SHA1 hash:
8db84f5f4c569c86c69aff464b2ffc4ce3dafa20
Link:
https://www.unpac.me/results/8f37cbb7-a9f0-4e1f-80e9-031ec84f2e28/
SH256 hash:
8e910fbfbf759e992ecc19c25080e7b16db746df5f559d3ba3ae887b857c11eb
MD5 hash:
e248e3be4218496826756f87dd66f432
SHA1 hash:
2adaa4f6e1da47b04d9cd2ae50f4a002b35a1a49
Link:
https://www.unpac.me/results/8f37cbb7-a9f0-4e1f-80e9-031ec84f2e28/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/8e910fbfbf75/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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:malware_Formbook_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.formbook.

File information

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

Malspam

Formbook

Executable exe 8e910fbfbf759e992ecc19c25080e7b16db746df5f559d3ba3ae887b857c11eb

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/233813/

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