MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 388099a4f3b1d9a56fd023c78c3130aa212632f04d6ba6399daa5ee9a5d398a1. 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: 13


Intelligence 13 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 388099a4f3b1d9a56fd023c78c3130aa212632f04d6ba6399daa5ee9a5d398a1
SHA3-384 hash: 0fad75a5a0db8147f0ca3ff90af0c94c02de2e0acc959b1a22b7334f5579c526366c7f08c14babe4eac18d9b3fab6c83
SHA1 hash: ef899064544e820f3f71375820dfe163b5953678
MD5 hash: c82170733c791052fb86369503ca96f6
humanhash: robin-london-london-south
File name:UAiMm05ZOIC7ZHg.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:962'560 bytes
First seen:2022-02-25 09:17:41 UTC
Last seen:2022-02-25 16:59:59 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 24576:AsmPO0xVX03n2r6QmIWMsA5EmFRIUrJkkBX3yVVVzVVVNVbVVVVCVrVVVbVVVRV0:ABG6232OQm6sA5hFR5PBX3yVVVzVVVNp
TLSH T179258E5835A670DED167CABECDD8ACB0DE25F43A670BE26750030E5E8B0DA56DE101B3
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
4
# of downloads :
248
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/244659/
Detection(s):
SecuriteInfo.com.AgentTesla-FDHRC82170733C79.6987.25043.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Sending a custom TCP request
Сreating synchronization primitives
Creating a file in the %AppData% directory
Enabling the 'hidden' option for recently created files
Adding an access-denied ACE
Creating a process from a recently created file
Creating a process with a hidden window
Creating a file in the %temp% directory
Launching a process
Unauthorized injection to a recently created process
Launching cmd.exe command interpreter
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/62189ed3dfdfa8501c59821e/reports/b2203928-9729-48a8-9c15-5939f5963c45/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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/be86ed7c-1c80-490f-9111-ea0375b99169
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/946306
Signature
Adds a directory exclusion to Windows Defender
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
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)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Sigma detected: Powershell Defender Exclusion
Sigma detected: Suspicious Add Scheduled Task From User AppData Temp
Sigma detected: Suspicius Schtasks From Env Var Folder
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 578787 Sample: UAiMm05ZOIC7ZHg.exe Startdate: 25/02/2022 Architecture: WINDOWS Score: 100 43 www.zbjiachuang.com 2->43 45 Found malware configuration 2->45 47 Malicious sample detected (through community Yara rule) 2->47 49 Antivirus detection for URL or domain 2->49 51 11 other signatures 2->51 11 UAiMm05ZOIC7ZHg.exe 7 2->11         started        signatures3 process4 file5 35 C:\Users\user\AppData\...\KLREBQkhpAiq.exe, PE32 11->35 dropped 37 C:\Users\...\KLREBQkhpAiq.exe:Zone.Identifier, ASCII 11->37 dropped 39 C:\Users\user\AppData\Local\...\tmp8C48.tmp, XML 11->39 dropped 41 C:\Users\user\...\UAiMm05ZOIC7ZHg.exe.log, ASCII 11->41 dropped 53 Uses schtasks.exe or at.exe to add and modify task schedules 11->53 55 Adds a directory exclusion to Windows Defender 11->55 57 Tries to detect virtualization through RDTSC time measurements 11->57 59 Injects a PE file into a foreign processes 11->59 15 UAiMm05ZOIC7ZHg.exe 11->15         started        18 powershell.exe 25 11->18         started        20 schtasks.exe 1 11->20         started        signatures6 process7 signatures8 69 Modifies the context of a thread in another process (thread injection) 15->69 71 Maps a DLL or memory area into another process 15->71 73 Sample uses process hollowing technique 15->73 75 Queues an APC in another process (thread injection) 15->75 22 explorer.exe 15->22 injected 24 conhost.exe 18->24         started        26 conhost.exe 20->26         started        process9 process10 28 msdt.exe 22->28         started        signatures11 61 Self deletion via cmd delete 28->61 63 Modifies the context of a thread in another process (thread injection) 28->63 65 Maps a DLL or memory area into another process 28->65 67 Tries to detect virtualization through RDTSC time measurements 28->67 31 cmd.exe 1 28->31         started        process12 process13 33 conhost.exe 31->33         started       
Detection:
xloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/388099a4f3b1d9a56fd023c78c3130aa212632f04d6ba6399daa5ee9a5d398a1/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-02-25 09:18:15 UTC
File Type:
PE (.Net Exe)
Extracted files:
7
AV detection:
22 of 28 (78.57%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=hcajtjhtwhm2k36qepdyymjqviqsmmxqjvv2mom5vjpotjottcqq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:wcur loader rat suricata
Link:
https://tria.ge/reports/220225-k9mprsghgr/
Behaviour
Creates scheduled task(s)
Gathers network information
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
Enumerates physical storage devices
Suspicious use of SetThreadContext
Checks computer location settings
Deletes itself
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
a71e04393c332037ef9f5c99866d5b2cd4e2524fb2be999b4757f3a28c7d8a89
MD5 hash:
d3cd86eecdec2b5722775cba6e026644
SHA1 hash:
043539a3ee218e06b8b9b04c3c9c94a4d8e22798
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/35730ee7-03f5-45f8-a895-abbc5ca39d44/
Parent samples :
3554e8a6c968467f681a97f7d0af60e7be69d515ee9b093b8be749811ec99c0b
388099a4f3b1d9a56fd023c78c3130aa212632f04d6ba6399daa5ee9a5d398a1
1da98c2ee11e4f3adcb1cc4486f4e74c50b925442896a29890c3b525a186f7c4
f5c46286398236732b22a56856c6df79c9f627a01f7c2a2017af4fe7ff0dd783
20c6e04ec0f495415cbe40623958124996eb2edbae3c3ff295a979d41de888b3
06c8c127ef48c4409df79aa16dda350b4c9a098677f9e9d95bceb9538f32f8db
SH256 hash:
5fdfa2d8495d77ccff727963418e4fb454b5ad817979d6ba248e0aeae9679079
MD5 hash:
6a82c7f2748c346806845c6c6b7931f5
SHA1 hash:
a1328f7268cb5c4566ff3ab5f55d8a08ad772f3b
Link:
https://www.unpac.me/results/35730ee7-03f5-45f8-a895-abbc5ca39d44/
SH256 hash:
7cd2bde9eea00874db77706d3be6a9b2a888fd99c9ca86ce264f88b69a08a08d
MD5 hash:
bcee4b8c5b984ff42fbde4f04e0ddc4b
SHA1 hash:
9d154289aa630244d5868465e45f9e00eca25a21
Link:
https://www.unpac.me/results/35730ee7-03f5-45f8-a895-abbc5ca39d44/
SH256 hash:
e3bdaf9e98eb65a070cf4424bc123e57ade151c41e4a0d375e769749155c1715
MD5 hash:
78a25e75b94923e889ecd100349facbe
SHA1 hash:
6b3f8db525d3c98f92ed480e664ab8ee9458340b
Link:
https://www.unpac.me/results/35730ee7-03f5-45f8-a895-abbc5ca39d44/
SH256 hash:
388099a4f3b1d9a56fd023c78c3130aa212632f04d6ba6399daa5ee9a5d398a1
MD5 hash:
c82170733c791052fb86369503ca96f6
SHA1 hash:
ef899064544e820f3f71375820dfe163b5953678
Link:
https://www.unpac.me/results/35730ee7-03f5-45f8-a895-abbc5ca39d44/
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/388099a4f3b1d9a56fd023c78c3130aa212632f04d6ba6399daa5ee9a5d398a1

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
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

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

Malspam

Formbook

Executable exe 388099a4f3b1d9a56fd023c78c3130aa212632f04d6ba6399daa5ee9a5d398a1

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/244659/

Comments