MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 efc51781bc3e82733e68f330ce4905d57bd3188a3584faa693a18223f17ec7ff. 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 2 File information Comments
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SHA256 hash: efc51781bc3e82733e68f330ce4905d57bd3188a3584faa693a18223f17ec7ff
SHA3-384 hash: 31d49d631b0614e8cae2782e9f2b8d6d6da9d945ac3c874a5e958e059b99467bb72ab83f56345c604030611a4ff2e1e1
SHA1 hash: 96b71756403f76ec7d1e91d0e692221a7a044383
MD5 hash: 85ae6c8906bf4281e8fc15c7b7c25d93
humanhash: south-seven-sweet-ceiling
File name:Confirmation.exe
Download: download sample
Signature Formbook
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File size:305'848 bytes
First seen:2022-07-07 13:09:31 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'741 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 6144:7b0O7vz9XeW10VBmSGVPbC2slkW72rJddE8Qeuk3iPn9/oDIQEk70O71Hq:X0OzJN0uSiCRlCrfZZyPOR0wK
TLSH T16854D06E37960F11C949567495E3852C07F2EB837273EF8E7D4940CA0F4239A9E4A3DA
TrID 69.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.9% (.EXE) Win64 Executable (generic) (10523/12/4)
6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.7% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.2% (.EXE) Win32 Executable (generic) (4505/5/1)
Reporter pr0xylife
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
243
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
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Link:
https://www.capesandbox.com/analysis/285512/
Detection(s):
Win.Packed.Cerbu-9952791-0
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Launching a process
Creating a file
Сreating synchronization primitives
Launching cmd.exe command interpreter
DNS request
Sending an HTTP GET request
Forced shutdown of a system process
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
cerbu overlay packed
Link:
https://www.filescan.io/uploads/62c6db6ac1b6cfcaa5ecf2e2/reports/f9e35067-8b67-4540-a1fe-8ef9635f4ebf/overview
Result
Verdict:
UNKNOWN
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
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/1296fdeb-b96c-4c66-9792-874b9315ce07
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1026424
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code references suspicious native API functions
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
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)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
System process connects to network (likely due to code injection or exploit)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 658915 Sample: Confirmation.exe Startdate: 07/07/2022 Architecture: WINDOWS Score: 100 36 Malicious sample detected (through community Yara rule) 2->36 38 Yara detected FormBook 2->38 40 .NET source code contains method to dynamically call methods (often used by packers) 2->40 42 3 other signatures 2->42 10 Confirmation.exe 1 2->10         started        process3 file4 28 C:\Users\user\...\Confirmation.exe.log, ASCII 10->28 dropped 50 Writes to foreign memory regions 10->50 52 Allocates memory in foreign processes 10->52 54 Injects a PE file into a foreign processes 10->54 56 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 10->56 14 cvtres.exe 10->14         started        signatures5 process6 signatures7 58 Modifies the context of a thread in another process (thread injection) 14->58 60 Maps a DLL or memory area into another process 14->60 62 Sample uses process hollowing technique 14->62 64 Queues an APC in another process (thread injection) 14->64 17 explorer.exe 14->17 injected process8 dnsIp9 30 www.myyswisslife.fr 128.65.195.180, 49780, 80 INFOMANIAK-ASCH Switzerland 17->30 32 www.mityell.com 1.2.3.4, 80 CLOUDFLARENETUS Australia 17->32 34 5 other IPs or domains 17->34 44 System process connects to network (likely due to code injection or exploit) 17->44 21 WWAHost.exe 17->21         started        signatures10 process11 signatures12 46 Modifies the context of a thread in another process (thread injection) 21->46 48 Maps a DLL or memory area into another process 21->48 24 cmd.exe 1 21->24         started        process13 process14 26 conhost.exe 24->26         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/efc51781bc3e82733e68f330ce4905d57bd3188a3584faa693a18223f17ec7ff/
Threat name:
Win32.Trojan.FormBook
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Status:
Malicious
First seen:
2022-07-07 13:11:36 UTC
File Type:
PE (.Net Exe)
Extracted files:
4
AV detection:
20 of 26 (76.92%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=57crpan4h2bhgpti6mym4sif2v55ggekgwcpvjutugbch4l6y77q._file
Verdict:
malicious
Label(s):
formbook
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Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook persistence spyware stealer suricata trojan
Link:
https://tria.ge/reports/220707-qectzaaee3/
Behaviour
Gathers network information
Modifies Internet Explorer settings
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 Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Loads dropped DLL
Adds policy Run key to start application
Formbook
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
Unpacked files
SH256 hash:
f48503aee9d9d8735f46a771fb6fc97d82970ca94a598ad17f43e9d9d3bb15d6
MD5 hash:
2e3988211c277f6d7a444af33876b63e
SHA1 hash:
bcf7fbbd48507ba3b1d78e3174857f5536f588b8
Detections:
win_formbook_g0
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win_formbook_auto
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Link:
https://www.unpac.me/results/8e24f9f1-0dbd-45f4-b82b-390a99a0494d/
Parent samples :
efc51781bc3e82733e68f330ce4905d57bd3188a3584faa693a18223f17ec7ff
f9af897c548059310a48f3367170aa8385068c310a75a4cde9f5f523d4db0bce
150e2791713123531c7df00ac55085f0383ace971bde8d30b4836e72bf2c4164
2f177a146603287dc4b1c68c16495a01f87d5f0e60f84880d9b875da8ffbdee3
SH256 hash:
e7eabd046e04851250e7f13040a744f4167cb89dadef6926810a77c22c91ef59
MD5 hash:
098b66a22651d5c644092502c953be02
SHA1 hash:
81a5a8abf6017e8b4b4de80be33d06dd959070ea
Link:
https://www.unpac.me/results/8e24f9f1-0dbd-45f4-b82b-390a99a0494d/
SH256 hash:
efc51781bc3e82733e68f330ce4905d57bd3188a3584faa693a18223f17ec7ff
MD5 hash:
85ae6c8906bf4281e8fc15c7b7c25d93
SHA1 hash:
96b71756403f76ec7d1e91d0e692221a7a044383
Link:
https://www.unpac.me/results/8e24f9f1-0dbd-45f4-b82b-390a99a0494d/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/efc51781bc3e/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/efc51781bc3e82733e68f330ce4905d57bd3188a3584faa693a18223f17ec7ff

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
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Rule name:Skystars_Malware_Imphash
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Author:Skystars LightDefender
Description:imphash

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/285512/

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