MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 1c66b22efb0bdbad857ae02729fc6354c8279f16ccd393ebfd16456363763fbf. 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: 8


Intelligence 8 IOCs YARA 1 File information Comments
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SHA256 hash: 1c66b22efb0bdbad857ae02729fc6354c8279f16ccd393ebfd16456363763fbf
SHA3-384 hash: ceca32e61808dc641ad5db76c72e931d48b1dccc62bb902c087bceef4fe67a7f1a17b08034de5894e251957ad0a28c95
SHA1 hash: be406ede6d23e58ce1ca5b3f2a9795e2948c90cc
MD5 hash: 98c03143137145aaba0d5ae40c502ea5
humanhash: hydrogen-ten-alabama-hamper
File name:98c03143137145aaba0d5ae40c502ea5.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:2'203'648 bytes
First seen:2021-03-08 13:55:45 UTC
Last seen:2021-03-08 16:03:12 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'738 x AgentTesla, 19'596 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 24576:XClA3eZ07QpGIPbR5cen0Eesq3tGng5VnN5GJgCelfrs:XClA3oGIPbVGYg5tN4JgC
Threatray 3'894 similar samples on MalwareBazaar
TLSH 3AA54A2243E9AF18F57E5B74193020489FF6BC56CB72D65CBD8D90E90FA6F018A53722
Reporter abuse_ch
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
114
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
03052021.xlsx
Verdict:
Malicious activity
Analysis date:
2021-03-08 08:18:48 UTC
Tags:
encrypted loader trojan formbook stealer
Link:
https://app.any.run/tasks/2889f7c0-854a-4afc-85f6-05ce4e19f5ad

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/122786/
Detection(s):
SecuriteInfo.com.W32.MSIL_Troj.AIL.genEldorado.5969.20075.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Result
Verdict:
MALICIOUS
Details
Windows PE Executable
Found a Windows Portable Executable (PE) binary. Depending on context, the presence of a binary is suspicious or malicious.
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/631244
Signature
Binary contains a suspicious time stamp
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
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 submitted file
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 sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Yara detected AntiVM_3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 364590 Sample: rbyB1UHXxR.exe Startdate: 08/03/2021 Architecture: WINDOWS Score: 100 31 www.blacksailus.com 2->31 39 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->39 41 Found malware configuration 2->41 43 Malicious sample detected (through community Yara rule) 2->43 45 7 other signatures 2->45 11 rbyB1UHXxR.exe 3 2->11         started        signatures3 process4 file5 29 C:\Users\user\AppData\...\rbyB1UHXxR.exe.log, ASCII 11->29 dropped 55 Tries to detect virtualization through RDTSC time measurements 11->55 57 Injects a PE file into a foreign processes 11->57 15 rbyB1UHXxR.exe 11->15         started        signatures6 process7 signatures8 59 Modifies the context of a thread in another process (thread injection) 15->59 61 Maps a DLL or memory area into another process 15->61 63 Sample uses process hollowing technique 15->63 65 Queues an APC in another process (thread injection) 15->65 18 explorer.exe 15->18 injected process9 dnsIp10 33 www.acdfr.com 199.34.228.73, 49775, 80 WEEBLYUS United States 18->33 35 www.xn--oi2b190cymc.com 112.175.185.27, 49772, 80 KIXS-AS-KRKoreaTelecomKR Korea Republic of 18->35 37 18 other IPs or domains 18->37 47 System process connects to network (likely due to code injection or exploit) 18->47 22 WWAHost.exe 18->22         started        signatures11 process12 signatures13 49 Modifies the context of a thread in another process (thread injection) 22->49 51 Maps a DLL or memory area into another process 22->51 53 Tries to detect virtualization through RDTSC time measurements 22->53 25 cmd.exe 1 22->25         started        process14 process15 27 conhost.exe 25->27         started       
Gathering data
Threat name:
ByteCode-MSIL.Trojan.Taskun
Create hunting rule
Status:
Malicious
First seen:
2021-03-08 09:21:47 UTC
AV detection:
13 of 28 (46.43%)
Threat level:
  5/5
Verdict:
malicious
Label(s):
formbook
Create hunting rule
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064cad19bee4580a82bc4ee3558e8510100ebba8da83720749f553cc411d5cb3
Formbook
06fa1b160e322bd7710c9110b1e4e873795b5c2680b8bbe70bbaf23484533459
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083d5efb4da09432a206cb7fba5cef2c82dd6cc080015fe69c2b36e71bca6c89
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21ba0bed0b05a2ce68496e73a5c103fb5b815ac2c77e997f46e5d09666c1c978
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6c131f342e8226706ba1b39cc955852b022130c14ea12bd3b3cf340bbea25bf6
Formbook
7c201535a28746b62adfa831cfccac096903f5b17ee83b8364fc890fa70a59fd
Formbook
92ddc88d7c1bde849c18747f4fcd526c240a81efe9c74ee1dcaa4a72ecc9ac3a
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af05a9b5f7ed6483d7f10ea0e521e0a15fd90d224ca04a9665991ab630a54991
Formbook
c8aaa220adc918c9972a9c588db765290bf51553bed7da48c604d188136d3073
Formbook
+ 3'884 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader loader rat
Link:
https://tria.ge/reports/210308-ykvdxqsj2a/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Xloader Payload
Xloader
Malware Config
C2 Extraction:
http://www.rizrvd.com/bw82/
Unpacked files
SH256 hash:
f9d949d2f56c449c5d346bb93ed04d38426f563b022dd179ae330dab46682c3b
MD5 hash:
871e23d748ba756eaab5777708f250f8
SHA1 hash:
c9816d4ab38541aaab9aa3eab7cb4898d0b72e4a
Link:
https://www.unpac.me/results/b4903b0e-0fcd-45b5-953a-e6814936f8c9/
SH256 hash:
1c66b22efb0bdbad857ae02729fc6354c8279f16ccd393ebfd16456363763fbf
MD5 hash:
98c03143137145aaba0d5ae40c502ea5
SHA1 hash:
be406ede6d23e58ce1ca5b3f2a9795e2948c90cc
Link:
https://www.unpac.me/results/b4903b0e-0fcd-45b5-953a-e6814936f8c9/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.65
Link:
https://yomi.yoroi.company/submissions/1c66b22efb0bdbad857ae02729fc6354c8279f16ccd393ebfd16456363763fbf

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:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFu
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Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time

File information

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

Web download

Formbook

Executable exe 1c66b22efb0bdbad857ae02729fc6354c8279f16ccd393ebfd16456363763fbf

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/1049934/
  
Delivery method
Distributed via web download
Cape
Cape
https://www.capesandbox.com/analysis/122786/

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