MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a8599ed108a38560de3851540edbbf3b83fc87a0f56fb883a24d6fda82b90c8f. 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: 10


Intelligence 10 IOCs YARA 2 File information Comments
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SHA256 hash: a8599ed108a38560de3851540edbbf3b83fc87a0f56fb883a24d6fda82b90c8f
SHA3-384 hash: 93841c952fbd9551ec67f4217b08a65e58b8fcb22126b887967b7f8cfb0c6de6458dda8bb39c22d44cb04480ca6cbd67
SHA1 hash: f75e810142f68120f4d38bcf1e3d5e693bed7e85
MD5 hash: e6dd96a4410adfaafb8543a571212b61
humanhash: virginia-potato-wolfram-twelve
File name:Outstanding Invoices.pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'042'944 bytes
First seen:2021-02-22 12:45:42 UTC
Last seen:2021-02-26 13:06:42 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'607 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:b8xB7vIpYxYxof1NpQansFrsiil2W7P0qFUF3CoI4N6a23v:bqZTq1FwAWzXCF3Co
Threatray 3'848 similar samples on MalwareBazaar
TLSH 96257B112744EF5CE0BEA73B94D89A4E97F9ED12A321D96F3CE161CF59A1F804721A03
Reporter GovCERT_CH
Tags:FormBook

Intelligence

File Origin
# of uploads :
66
# of downloads :
118
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/118310/
Detection(s):
SecuriteInfo.com.Win32.22148.5901.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
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.
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/614056
Signature
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found malware configuration
Initial sample is a PE file and has a suspicious name
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
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Suspicious Double Extension
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 AntiVM_3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 356039 Sample: Outstanding Invoices.pdf.exe Startdate: 22/02/2021 Architecture: WINDOWS Score: 100 36 www.richieshoes.com 2->36 38 richieshoes.com 2->38 42 Found malware configuration 2->42 44 Malicious sample detected (through community Yara rule) 2->44 46 Antivirus detection for URL or domain 2->46 48 11 other signatures 2->48 11 Outstanding Invoices.pdf.exe 3 2->11         started        signatures3 process4 file5 28 C:\Users\...\Outstanding Invoices.pdf.exe.log, ASCII 11->28 dropped 14 Outstanding Invoices.pdf.exe 11->14         started        process6 signatures7 56 Modifies the context of a thread in another process (thread injection) 14->56 58 Maps a DLL or memory area into another process 14->58 60 Sample uses process hollowing technique 14->60 62 Queues an APC in another process (thread injection) 14->62 17 explorer.exe 14->17 injected process8 dnsIp9 30 www.rangers3.xyz 199.192.19.85, 49759, 80 NAMECHEAP-NETUS United States 17->30 32 thefallofthedollar.com 34.102.136.180, 49760, 49763, 80 GOOGLEUS United States 17->32 34 3 other IPs or domains 17->34 40 System process connects to network (likely due to code injection or exploit) 17->40 21 mstsc.exe 17->21         started        signatures10 process11 signatures12 50 Modifies the context of a thread in another process (thread injection) 21->50 52 Maps a DLL or memory area into another process 21->52 54 Tries to detect virtualization through RDTSC time measurements 21->54 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/a8599ed108a38560de3851540edbbf3b83fc87a0f56fb883a24d6fda82b90c8f/
Threat name:
ByteCode-MSIL.Backdoor.NanoBot
Create hunting rule
Status:
Malicious
First seen:
2021-02-22 12:38:54 UTC
AV detection:
20 of 29 (68.97%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=vbmz5uiiuocwbxrykfka5w57hob7zb5a6vx3ra5cjvx5vavzbshq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
09715a97873a089c9dc80219175d50508628f4f794639c2e725bad85d68804c2
Formbook
125b3f2e9eef8a9a9ef6c677fd9a30af2f153284c727aa914329e77bfe2ac49d
Formbook
393b127088802012cba2a9b9065c17069669c919e6513b34f57d30d12f631d76
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720ffc99aa96c665aae27db46f776476c37ca113db207790579adfd81c73ad05
Formbook
7ffcfe208773bc49ef7a0e832fe117592b8eaf83484ebc9cfe9c64eb354aadec
Formbook
8c5a90a4c4470d05fff7757920aa0a8bf56edab04f4eb926ba789652f1bfc74c
Formbook
9e38c0c3c516583da526016c4c6a671c53333d3d156562717db79eac63587522
Formbook
a1db821171c7bd2950fad26899fbbc88c787f0cc7d869ee9b29f86bf09ebb92b
Formbook
d68888aa1e155ac65bd1ddabcf05f61bfff65f79a11cc0ee099200c3da8c5d35
Formbook
e68f17cfe87742103150ca9abd6cc16581caa6e0e0243d03fae2c89c2609c974
Formbook
+ 3'838 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook rat spyware stealer trojan
Link:
https://tria.ge/reports/210222-5h4lhj5asx/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Deletes itself
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.thefallofthedollar.com/ocq1/
Unpacked files
SH256 hash:
e624003658c4f8b349f567c82229fd15d1e63d3d20fe6f7b4388403038cd2a44
MD5 hash:
b6ce7c1d81b9271eab825ea63de154c3
SHA1 hash:
0e7b89555314f8908c1098b652c9bf50e5ecc27b
Link:
https://www.unpac.me/results/986f867b-47d5-4df0-9b3e-479064dcaed5/
SH256 hash:
a8599ed108a38560de3851540edbbf3b83fc87a0f56fb883a24d6fda82b90c8f
MD5 hash:
e6dd96a4410adfaafb8543a571212b61
SHA1 hash:
f75e810142f68120f4d38bcf1e3d5e693bed7e85
Link:
https://www.unpac.me/results/986f867b-47d5-4df0-9b3e-479064dcaed5/
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/a8599ed108a38560de3851540edbbf3b83fc87a0f56fb883a24d6fda82b90c8f

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_InTheFu
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
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

File information

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

Malspam

Formbook

ace ef455878d681b9a1255fa75207ea3cc905c96e780b2191f48873006d8a811327

Formbook

Executable exe a8599ed108a38560de3851540edbbf3b83fc87a0f56fb883a24d6fda82b90c8f

(this sample)

  
Dropped by
MD5 02d74e80efafe62595927e0c24862b79
  
Dropped by
SHA256 ef455878d681b9a1255fa75207ea3cc905c96e780b2191f48873006d8a811327
  
Dropped by
Formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/118310/

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