MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 81c7545ad871b477660e586efb7ce289931d3bc089ba4c0c9f615ecb144f0a76. 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 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 81c7545ad871b477660e586efb7ce289931d3bc089ba4c0c9f615ecb144f0a76
SHA3-384 hash: 2455f7677dce61887315aadea3c30ae427427c3fc730db066ea7812c0460542a1bf9687f05353cf7315670c332c91de8
SHA1 hash: b4ce5580a01b4aefc50d09f936994407b1e74a07
MD5 hash: aed979b3d4c9613f225ed1cf36834d55
humanhash: carpet-potato-apart-four
File name:COT001124.exe
Download: download sample
Signature FormBook
Create hunting rule
File size:708'608 bytes
First seen:2020-07-31 07:50:50 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 2e374e6a01735b73e577e6a14415ed0c (5 x MassLogger, 2 x NanoCore, 1 x FormBook)
ssdeep 12288:TCVMTcr5w3T2qnLaKr1K2KXIN0h13i4ywIgnI7od2DCaGw7yxHrGyHoo:OiQOD2qr1K2rNsU4nInhGeyxH1/
Threatray 5'092 similar samples on MalwareBazaar
TLSH DBE4BF23B2E04437D133163F9C1B6759A83ABF1C3A2498462BE92D4C5F39771346AE97
Reporter abuse_ch
Tags:exe FormBook


Avatar
abuse_ch
Malspam distributing FormBook:

HELO: smtp69.ord1d.emailsrvr.com
Sending IP: 184.106.54.69
From: Gloria E <dmendoza@corteacero.com.mx>
Subject: Cotización baldosa pvc
Attachment: COT001124.zip (contains "COT001124.exe")

Intelligence

File Origin
# of uploads :
1
# of downloads :
74
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/36011/
Detection(s):
PUA.Win.Adware.Slugin-6803969-0
Create hunting rule

PUA.Win.Adware.Slugin-6840354-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Launching a process
Launching cmd.exe command interpreter
Setting browser functions hooks
Unauthorized injection to a system process
Unauthorized injection to a browser process
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/405131
Signature
Benign windows process drops PE files
Contains functionality to detect sleep reduction / modifications
Creates autostart registry keys with suspicious names
Detected FormBook malware
Detected unpacking (changes PE section rights)
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)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
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 virtualization through RDTSC time measurements
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file access)
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 254813 Sample: COT001124.exe Startdate: 31/07/2020 Architecture: WINDOWS Score: 100 53 www.millogisticshk.com 2->53 55 g.msn.com 2->55 57 asf-ris-prod-neurope.northeurope.cloudapp.azure.com 2->57 65 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->65 67 Malicious sample detected (through community Yara rule) 2->67 69 Detected unpacking (changes PE section rights) 2->69 71 6 other signatures 2->71 11 COT001124.exe 2->11         started        signatures3 process4 signatures5 89 Detected unpacking (changes PE section rights) 11->89 91 Maps a DLL or memory area into another process 11->91 93 Tries to detect virtualization through RDTSC time measurements 11->93 95 Contains functionality to detect sleep reduction / modifications 11->95 14 COT001124.exe 11->14         started        process6 signatures7 97 Modifies the context of a thread in another process (thread injection) 14->97 99 Maps a DLL or memory area into another process 14->99 101 Sample uses process hollowing technique 14->101 103 Queues an APC in another process (thread injection) 14->103 17 explorer.exe 3 6 14->17 injected process8 dnsIp9 47 eljefenyc.online 34.102.136.180, 49736, 80 GOOGLEUS United States 17->47 49 www.onexperiment.com 17->49 51 2 other IPs or domains 17->51 41 C:\Users\user\...\ThumbCachempixqj8.exe, PE32 17->41 dropped 73 System process connects to network (likely due to code injection or exploit) 17->73 75 Benign windows process drops PE files 17->75 22 raserver.exe 1 17 17->22         started        26 ThumbCachempixqj8.exe 17->26         started        28 mstsc.exe 17->28         started        30 2 other processes 17->30 file10 signatures11 process12 file13 43 C:\Users\user\AppData\...\KN8logrv.ini, data 22->43 dropped 45 C:\Users\user\AppData\...\KN8logri.ini, data 22->45 dropped 77 Detected FormBook malware 22->77 79 Tries to steal Mail credentials (via file access) 22->79 81 Creates autostart registry keys with suspicious names 22->81 87 2 other signatures 22->87 32 cmd.exe 1 22->32         started        83 Maps a DLL or memory area into another process 26->83 34 ThumbCachempixqj8.exe 26->34         started        85 Tries to detect virtualization through RDTSC time measurements 28->85 37 ThumbCachempixqj8.exe 30->37         started        signatures14 process15 signatures16 39 conhost.exe 32->39         started        59 Modifies the context of a thread in another process (thread injection) 34->59 61 Maps a DLL or memory area into another process 34->61 63 Sample uses process hollowing technique 34->63 process17
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/81c7545ad871b477660e586efb7ce289931d3bc089ba4c0c9f615ecb144f0a76/
Threat name:
Win32.Trojan.DataStealer
Create hunting rule
Status:
Malicious
First seen:
2020-07-31 07:52:15 UTC
AV detection:
40 of 48 (83.33%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=qhdviwwyog2hozqolbxpw7hcrgjr2o6arg5eyde7mfpmwfcpbj3a._file
Verdict:
malicious
Label(s):
netwirerc
Create hunting rule
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FormBook
3e98d7f59e495ddfa5140a50f70347bb4a56296ca2dcb6602f65ebb4e4a0373b
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474cad642b1cf88f8d7f922cbfd9b8a00d7fc0eb40cafc0877007ee2884f105f
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6f827b68129d30609057c2e6b36be05649fce91d6bc8ee3d3566ca5c6aba562b
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9b2c6f08cd9a4e3b144422de4d540290542ce50239f2c85697a036a461b25264
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b042e4bdfe19df2aa474fd5e2294aecc9a07d447c96466db7a7e20316d885634
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b57c9384280389b262d09cb4fa5b5465aadd4aaba2afb6d48c5d6e7c3f8d923e
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c7544c2d4180660fc3a96f3b66b5caa0e168dcfbb35a870f1c576a152ed62348
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c7ab7dce5d2ed6eceaa6047479f76981c101e436b16d91f857fd8a573859fe14
FormBook
e13acda03eb4829793beb5c0664d5752663b7ef5ae72b63724e7eaf189a9fec4
FormBook
+ 5'082 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
rat spyware evasion trojan stealer family:formbook persistence
Link:
https://tria.ge/reports/200731-b7tm29eb1x/
Behaviour
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious behavior: MapViewOfSection
System policy modification
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Modifies Internet Explorer settings
Suspicious use of WriteProcessMemory
Drops file in Program Files directory
Suspicious use of SetThreadContext
Checks whether UAC is enabled
Reads user/profile data of web browsers
Deletes itself
Adds policy Run key to start application
Formbook Payload
Formbook
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/81c7545ad871b477660e586efb7ce289931d3bc089ba4c0c9f615ecb144f0a76

File information

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

Malspam

FormBook

zip 8d4647057817cd011e6bf41a0bedabb2bf64663863a63aa2235502339fababa3

FormBook

Executable exe 81c7545ad871b477660e586efb7ce289931d3bc089ba4c0c9f615ecb144f0a76

(this sample)

  
Dropped by
MD5 d8825ddf0afbc53f479c66461c046db0
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/36011/
  
Dropped by
SHA256 8d4647057817cd011e6bf41a0bedabb2bf64663863a63aa2235502339fababa3

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