MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2dfd64c86cfb81ed8a280b74e6e7b244a8a98d3788c8c552266ddd5327e4f055. 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 1 File information Comments

SHA256 hash: 2dfd64c86cfb81ed8a280b74e6e7b244a8a98d3788c8c552266ddd5327e4f055
SHA3-384 hash: ba51c58fefcb33aac6800876481d134b2eb39c83d314b08079499c20a4da09c0150732e7dc9cef880135d0bb0f1c23f5
SHA1 hash: e4fd634040abd4f6b58aa7efe8fb59f7e64a395f
MD5 hash: 601260b52c23f2be80998a22b2fc77dd
humanhash: may-colorado-juliet-oklahoma
File name:PO.doc
Download: download sample
Signature Formbook
File size:19'661 bytes
First seen:2021-09-28 09:22:29 UTC
Last seen:Never
File type:Word file doc
MIME type:text/rtf
ssdeep 384:Ac8lCXedYICEJZv+c3zvYcK1CJ+8sgl+0nmhWnPo9lMVEdVACzl9Q2qmNj7aJ52E:AvcXe2ILvZ3tKtbvWbV1MQfEE
TLSH T1719252BDC08706988F46A7BC670B1F46014C7A2EF788957732B8673967E2C7A4112D3D
Reporter @abuse_ch
Tags:doc FormBook

Intelligence


File Origin
# of uploads :
1
# of downloads :
95
Origin country :
FR FR
Mail intelligence
No data
Vendor Threat Intelligence
ID:
1
File name:
PO.doc
Verdict:
Malicious activity
Analysis date:
2021-09-28 09:39:04 UTC
Tags:
exploit CVE-2017-11882 loader trojan formbook stealer

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Verdict:
Malicious
File type:
application/msword
Has a screenshot:
False
Contains macros:
False
Result
Verdict:
Malicious
File Type:
Fake RTF File
Alert level:
9%
Result
Threat name:
FormBook
Detection:
malicious
Classification:
troj.expl.evad
Score:
100 / 100
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
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 domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Office equation editor drops PE file
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Droppers Exploiting CVE-2017-11882
Sigma detected: EQNEDT32.EXE connecting to internet
Sigma detected: File Dropped By EQNEDT32EXE
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
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
behaviorgraph top1 signatures2 2 Behavior Graph ID: 492582 Sample: PO.doc Startdate: 28/09/2021 Architecture: WINDOWS Score: 100 50 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->50 52 Multi AV Scanner detection for domain / URL 2->52 54 Found malware configuration 2->54 56 18 other signatures 2->56 9 EQNEDT32.EXE 11 2->9         started        14 WINWORD.EXE 291 23 2->14         started        process3 dnsIp4 38 fantecheo.tk 185.239.243.112, 49165, 80 CLOUDIE-AS-APCloudieLimitedHK Moldova Republic of 9->38 32 C:\Users\user\AppData\...\ibeframnk863.exe, PE32 9->32 dropped 34 C:\Users\user\AppData\...\ibefrankszx[1].exe, PE32 9->34 dropped 74 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 9->74 16 ibeframnk863.exe 9->16         started        36 C:\Users\user\Desktop\~$PO.doc, data 14->36 dropped file5 signatures6 process7 signatures8 44 Multi AV Scanner detection for dropped file 16->44 46 Tries to detect virtualization through RDTSC time measurements 16->46 48 Injects a PE file into a foreign processes 16->48 19 ibeframnk863.exe 16->19         started        22 ibeframnk863.exe 16->22         started        process9 signatures10 58 Modifies the context of a thread in another process (thread injection) 19->58 60 Maps a DLL or memory area into another process 19->60 62 Sample uses process hollowing technique 19->62 64 Queues an APC in another process (thread injection) 19->64 24 svchost.exe 19->24         started        27 explorer.exe 19->27 injected process11 dnsIp12 66 Modifies the context of a thread in another process (thread injection) 24->66 68 Maps a DLL or memory area into another process 24->68 70 Tries to detect virtualization through RDTSC time measurements 24->70 30 cmd.exe 24->30         started        40 www.audiofactaesthetic.com 63.250.43.8, 49167, 80 NAMECHEAP-NETUS United States 27->40 42 www.personowner.guru 99.83.154.118, 49166, 80 AMAZON-02US United States 27->42 72 System process connects to network (likely due to code injection or exploit) 27->72 signatures13 process14
Threat name:
Document-RTF.Exploit.Heuristic
Status:
Malicious
First seen:
2021-09-28 07:20:57 UTC
AV detection:
13 of 45 (28.89%)
Threat level:
  2/5
Result
Malware family:
n/a
Score:
  8/10
Tags:
n/a
Behaviour
Checks processor information in registry
Enumerates system info in registry
Launches Equation Editor
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: AddClipboardFormatListener
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Office loads VBA resources, possible macro or embedded object present
Drops file in Windows directory
Blocklisted process makes network request
Malware family:
FormBook
Verdict:
Malicious

YARA Signatures


MalareBazaar uses YARA rules from several public and non-public repositories, such as Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious proccess dumps they may create. Please note that only results from TLP:WHITE rules are being displayeyd.

Rule name:INDICATOR_RTF_MalVer_Objects
Author:ditekSHen
Description:Detects RTF documents with non-standard version and embeding one of the object mostly observed in exploit documents.

File information


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

Comments