MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 388292015e4c2d075b935a8299d99335d957e3ad5134a33f28c4dc7f5e3687c5. 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
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SHA256 hash: 388292015e4c2d075b935a8299d99335d957e3ad5134a33f28c4dc7f5e3687c5
SHA3-384 hash: 9efecb2e815cb4dba369625de295e95ab7311660b982c2daa91ee698442ec4febfd4819fce365405dd475671fa7373fa
SHA1 hash: 91e3fd4718786c523620c31465232113580ea477
MD5 hash: 08b4042d2a89ebcff8537ba458295e48
humanhash: bakerloo-winner-echo-ink
File name:_BUSAN_HOCHIMINH_FEB.25.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:756'224 bytes
First seen:2022-02-21 14:26:04 UTC
Last seen:2022-02-21 16:11:28 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'744 x AgentTesla, 19'608 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:dwRl4Zby0chFFQWNd9M/VqnM2GQkTtZrD1fNABd0ioEXZm33h:elIbHchFv6/6TGQk7Ly0aJs
Threatray 10'249 similar samples on MalwareBazaar
TLSH T1DEF4DFDC28BA01F9F37B8AFE5EDCE5B0CB79E6256501F4B979D50A120B40B4489C2379
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
245
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
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Link:
https://www.capesandbox.com/analysis/242979/
Detection(s):
SecuriteInfo.com.Trojan.Packed2.44053.1922.29616.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
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
Launching cmd.exe command interpreter
Forced shutdown of a system process
Enabling autorun by creating a file
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
obfuscated packed replace.exe
Link:
https://www.filescan.io/uploads/6213a104ac8ad0468b613c37/reports/81f85cdc-94a1-4457-ae7d-69a65f53bf57/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
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/ac3999f5-e91f-4b4f-ac3a-17cf70f0150f
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/943289
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
Adds a directory exclusion to Windows Defender
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
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Sigma detected: Powershell Defender Exclusion
Sigma detected: Suspicius Add Task From User AppData Temp
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
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
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 575767 Sample: _BUSAN_HOCHIMINH_FEB.25.exe Startdate: 21/02/2022 Architecture: WINDOWS Score: 100 43 www.moneti.site 2->43 45 www.alternativesclimat.net 2->45 47 alternativesclimat.net 2->47 49 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->49 51 Found malware configuration 2->51 53 Malicious sample detected (through community Yara rule) 2->53 55 11 other signatures 2->55 11 _BUSAN_HOCHIMINH_FEB.25.exe 7 2->11         started        signatures3 process4 file5 35 C:\Users\user\AppData\...\YtGUemuxgzC.exe, PE32 11->35 dropped 37 C:\Users\...\YtGUemuxgzC.exe:Zone.Identifier, ASCII 11->37 dropped 39 C:\Users\user\AppData\Local\...\tmpA112.tmp, XML 11->39 dropped 41 C:\Users\...\_BUSAN_HOCHIMINH_FEB.25.exe.log, ASCII 11->41 dropped 57 Uses schtasks.exe or at.exe to add and modify task schedules 11->57 59 Writes to foreign memory regions 11->59 61 Adds a directory exclusion to Windows Defender 11->61 63 Injects a PE file into a foreign processes 11->63 15 vbc.exe 11->15         started        18 powershell.exe 25 11->18         started        20 schtasks.exe 1 11->20         started        signatures6 process7 signatures8 71 Modifies the context of a thread in another process (thread injection) 15->71 73 Maps a DLL or memory area into another process 15->73 75 Sample uses process hollowing technique 15->75 77 2 other signatures 15->77 22 explorer.exe 15->22 injected 24 conhost.exe 18->24         started        26 conhost.exe 20->26         started        process9 process10 28 raserver.exe 22->28         started        signatures11 65 Modifies the context of a thread in another process (thread injection) 28->65 67 Maps a DLL or memory area into another process 28->67 69 Tries to detect virtualization through RDTSC time measurements 28->69 31 cmd.exe 1 28->31         started        process12 process13 33 conhost.exe 31->33         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/388292015e4c2d075b935a8299d99335d957e3ad5134a33f28c4dc7f5e3687c5/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
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Status:
Malicious
First seen:
2022-02-21 14:16:44 UTC
File Type:
PE (.Net Exe)
Extracted files:
7
AV detection:
20 of 28 (71.43%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=hcbjeak6jqwqow4tlkbjtwmtgxmvpy5nke2kgpziytoh6xrwq7cq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
2e3fd0cf4b98695538a9c744e1961b63ec166fe3c02719560fedaddcd0fde689
Formbook
98a0baed911fcca09a50dd4dc17f6f65edf26cc6d834681b1d2a270bfbf3f45c
Formbook
a14a184fb1d2aae9c388576180020ee018e0784212b59e545c15afce21eeb6cd
Formbook
a6fc3d54528af98d4e971543db7f11f891d08269e288ad6822959c0a47665609
Formbook
a94cf69dea9775df9f51f32d9591f7208ac9c712289a1b851c30de3938b5a976
Formbook
c8dfddd4c5d6b2c5ee3c4f74651673e6975c4ae05d7aece0c08e40c2ad92db7e
Formbook
d472be00c8fd766636fb12d2acb553ab17876fcf722587c87a8fca98a7d20aee
Formbook
e649ef1ecf0e0daefe140fa78271435271c8d55607f8365ddef4d94b66bfdfdd
Formbook
+ 10'239 additional samples on MalwareBazaar
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:a04s rat spyware stealer trojan
Link:
https://tria.ge/reports/220221-rrw9taaed3/
Behaviour
Creates scheduled task(s)
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
Drops file in Windows directory
Suspicious use of SetThreadContext
Checks computer location settings
Uses the VBS compiler for execution
Formbook Payload
Formbook
Unpacked files
SH256 hash:
a71f4b83e8284b1c622ca510a9a2db7a49930b04851afe3e428fc55d4ef98d3c
MD5 hash:
e42bfb7f851104e94734e4e9f1225a22
SHA1 hash:
53e2b29d72f6b6ea2189f0f6d6d81cfd47effbae
Detections:
win_formbook_g0
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win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/db8c2a91-5db9-42bd-9589-903299aa45f2/
Parent samples :
388292015e4c2d075b935a8299d99335d957e3ad5134a33f28c4dc7f5e3687c5
c1f75b77b9dab7a1f9681c139e566adf5cbc570c87cc2918a3c68d0471c43e38
SH256 hash:
04e27134490848fda6a4fc5abaa4001d36bc222f0b1098698573c510e3af69c8
MD5 hash:
a790ecec70493caf5f3db3e65482dc87
SHA1 hash:
e70f111db8eab4f3ffaf9ce7d480288c4cfcac3e
Link:
https://www.unpac.me/results/db8c2a91-5db9-42bd-9589-903299aa45f2/
SH256 hash:
3ba5098c649aa12b6257a2f289b890d7908bbd9634675dffe45d75c7211a8f39
MD5 hash:
3f5d8be869407b60d3a8512c7ed64e37
SHA1 hash:
dd843d20f864571366bed44df19cf5413946f6bb
Link:
https://www.unpac.me/results/db8c2a91-5db9-42bd-9589-903299aa45f2/
SH256 hash:
e33254e2ad4d279914a29450f98d1750a9f513fc8ddb853e0dd8346b805faa43
MD5 hash:
b597cce7bfc65e56fa69ebb7f413a33f
SHA1 hash:
7ee40df5ac783432e7c9f7be4f7ed1f286345d58
Link:
https://www.unpac.me/results/db8c2a91-5db9-42bd-9589-903299aa45f2/
SH256 hash:
388292015e4c2d075b935a8299d99335d957e3ad5134a33f28c4dc7f5e3687c5
MD5 hash:
08b4042d2a89ebcff8537ba458295e48
SHA1 hash:
91e3fd4718786c523620c31465232113580ea477
Link:
https://www.unpac.me/results/db8c2a91-5db9-42bd-9589-903299aa45f2/
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/388292015e4c2d075b935a8299d99335d957e3ad5134a33f28c4dc7f5e3687c5

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
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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 388292015e4c2d075b935a8299d99335d957e3ad5134a33f28c4dc7f5e3687c5

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/242979/

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