MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 99c4f75948b26af511bfa055db8d18567a3d662107e35e91102b5576f02acb84. 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 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 99c4f75948b26af511bfa055db8d18567a3d662107e35e91102b5576f02acb84
SHA3-384 hash: bb8905d39a3eadbdc47e15b9ef58f7a59ff23e373fc1777024f41bc01ac628468cc604cddfa7208bc016693d1dec4be7
SHA1 hash: 7acaefedb144ecfff099cc2367e388b83bd5ee5f
MD5 hash: 6137807b29f7176e5cec7b7c3575e86f
humanhash: music-fifteen-comet-mississippi
File name:Quotation.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:507'904 bytes
First seen:2020-10-15 12:55:12 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'649 x AgentTesla, 19'461 x Formbook, 12'202 x SnakeKeylogger)
ssdeep 6144:cuwemNlKUl0sev6H5+Q0JUwJsSyR0ahtIQl/FltCOIKYa5mh5zhmCHfTqs8SYq4:bTbHDdiSG0ahtIQ6KYa5mf01sC
TLSH 12B49D727C92DD7FCA6A0731146588CEFA7612D63F60870D625E8B8CCE11B6BA743247
Reporter abuse_ch
Tags:exe FormBook


Avatar
abuse_ch
Malspam distributing unidentified malware:

HELO: msa-smtp4.hinet.net
Sending IP: 168.95.6.54
From: 昱來企業股份有限公司 <yuinlai@ms27.hinet.net>
Subject: RE：引用我們的報價單
Attachment: 引用我們的報價單.img (contains "Quotation.exe")

Intelligence

File Origin
# of uploads :
1
# of downloads :
92
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/71392/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a file in the %temp% subdirectories
Creating a window
Creating a file
Creating a process from a recently created file
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Unauthorized injection to a system process
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/492477
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Allocates memory in foreign processes
Initial sample is a PE file and has a suspicious name
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 submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Tries to detect virtualization through RDTSC time measurements
Uses netstat to query active network connections and open ports
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 298743 Sample: Quotation.exe Startdate: 15/10/2020 Architecture: WINDOWS Score: 100 34 Malicious sample detected (through community Yara rule) 2->34 36 Multi AV Scanner detection for submitted file 2->36 38 Yara detected FormBook 2->38 40 5 other signatures 2->40 10 Quotation.exe 8 2->10         started        process3 file4 26 C:\Users\user\AppData\...\AddInProcess32.exe, PE32 10->26 dropped 28 C:\Users\user\AppData\...\Quotation.exe.log, ASCII 10->28 dropped 30 C:\Users\user\AppData\Local\Temp\...\Fdf.dll, PE32 10->30 dropped 32 C:\Users\user\AppData\...\AgileDotNetRT.dll, PE32 10->32 dropped 48 Writes to foreign memory regions 10->48 50 Allocates memory in foreign processes 10->50 52 Tries to detect virtualization through RDTSC time measurements 10->52 54 Injects a PE file into a foreign processes 10->54 14 AddInProcess32.exe 10->14         started        signatures5 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 2 other signatures 14->62 17 explorer.exe 14->17 injected process8 process9 19 NETSTAT.EXE 17->19         started        signatures10 42 Modifies the context of a thread in another process (thread injection) 19->42 44 Maps a DLL or memory area into another process 19->44 46 Tries to detect virtualization through RDTSC time measurements 19->46 22 cmd.exe 1 19->22         started        process11 process12 24 conhost.exe 22->24         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/99c4f75948b26af511bfa055db8d18567a3d662107e35e91102b5576f02acb84/
Threat name:
ByteCode-MSIL.Trojan.Malrep
Create hunting rule
Status:
Malicious
First seen:
2020-10-15 10:15:53 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=thcpowkiwjvpken7ubk5xdiykz5d2zrba7rv5eiqfnkxn4bkzoca._file
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
rat trojan spyware stealer family:formbook
Link:
https://tria.ge/reports/201015-g39sf4ldka/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Loads dropped DLL
Executes dropped EXE
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.beardanceproperties.com/nkj8/
Unpacked files
SH256 hash:
99c4f75948b26af511bfa055db8d18567a3d662107e35e91102b5576f02acb84
MD5 hash:
6137807b29f7176e5cec7b7c3575e86f
SHA1 hash:
7acaefedb144ecfff099cc2367e388b83bd5ee5f
Link:
https://www.unpac.me/results/b2c69627-6080-4369-9fed-42b699b431ba/
SH256 hash:
30140c3bf5874d7d184b15513016f9de1524ae95a5efe9a1cb15bad6d6936d64
MD5 hash:
03847d82611bc6461cbb99ca768828f1
SHA1 hash:
39859a3fd3326520dfd1ed10456bb227933a8871
Link:
https://www.unpac.me/results/b2c69627-6080-4369-9fed-42b699b431ba/
SH256 hash:
19d9922060be89a70b76e5c0056e751f1baa5d41819235c92cf4f5d7668e1267
MD5 hash:
811864a0b06c529af894a7fec6ddbf47
SHA1 hash:
d35b82933eb06a6ec60e8cbbdb65eb6cdcaeb6d2
Link:
https://www.unpac.me/results/b2c69627-6080-4369-9fed-42b699b431ba/
Parent samples :
afa2f55e149097f9b250142bbfd94d9d56d10649c96adb079fdb0dfdac7c6660
69e2ae11e1b5cbe120bf02301191a1cf05e87fc09b09d63bd782abbf3615d05d
0b778873c94f6bc89a40294c0e85a38ab82509260cd2a2e8b73d00c5c90e8757
7ddfa6f44a60f4b894321f6977f8121cfb371c3c61ac872c58ba61fd5ee13deb
SH256 hash:
cc68e3eb8bccc4a249ec5b6f7d83cb2230442040a398aa362c30bfa520987bc5
MD5 hash:
0c74f2c28837f15bd9481236e4fff068
SHA1 hash:
d6aaa270e7cde6512b8861d725556433b7da78b9
Link:
https://www.unpac.me/results/b2c69627-6080-4369-9fed-42b699b431ba/
SH256 hash:
d404c6bdd9869534de14d0c0745a4a16dee382b4ac7af4038503862418aafd68
MD5 hash:
8159232efafe7a26ed98eea972c23b2e
SHA1 hash:
b161774003786d46b184f1a5bb55b3b5e140ba07
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/b2c69627-6080-4369-9fed-42b699b431ba/
Parent samples :
d3096fc849c6c61f96bd31d7cdd062720e18e50a8ad5cabc23c7156c0ecef316
6d793847fa7272019425c00c17e6f84f719a74a926219a6f6a9c7d96f033fc48
99c4f75948b26af511bfa055db8d18567a3d662107e35e91102b5576f02acb84
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/99c4f75948b26af511bfa055db8d18567a3d662107e35e91102b5576f02acb84

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:Formbook
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator
Rule name:win_formbook_g0
Create hunting rule
Author:Slavo Greminger, SWITCH-CERT

File information

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

Malspam

Formbook

img ba1d6cb7665152901a41da941c841d37134a9ac0be6d6a160baf3a09eb295bc2

Formbook

Executable exe 99c4f75948b26af511bfa055db8d18567a3d662107e35e91102b5576f02acb84

(this sample)

  
Dropped by
MD5 a02a4afc748b779bf44d8a3224526c19
  
Delivery method
Distributed via e-mail attachment
  
Dropped by
SHA256 ba1d6cb7665152901a41da941c841d37134a9ac0be6d6a160baf3a09eb295bc2
Cape
Cape
https://www.capesandbox.com/analysis/71392/

Comments