MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 28b77890ae9535db2da6bf03e7c41471d173b86fa67b907dafa38aede34fc148. 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: 12


Intelligence 12 IOCs YARA 3 File information Comments
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SHA256 hash: 28b77890ae9535db2da6bf03e7c41471d173b86fa67b907dafa38aede34fc148
SHA3-384 hash: 811af8e181b1c5d4a2f2d59683d9332d7b09be40fa79f0046a9be2b82a0fecf84ec9519e366895611bd9b8a6d6393e26
SHA1 hash: 57d0b25b3dd1d648c710c3ff5e44041d39d0cafc
MD5 hash: 026df37a937471af093a3e8bc8636b7b
humanhash: ohio-kilo-finch-foxtrot
File name:PO_#10292132.exe
Download: download sample
Signature Formbook
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File size:386'560 bytes
First seen:2021-10-29 07:28:20 UTC
Last seen:2021-10-29 08:28:28 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'741 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 6144:plfZxxcH614b47d6f4Gz4K6HCFWZ1BVAHEyf7aqzQlL5l/cvdugjpkUAcifxYl9c:plfZxSKBXyf7awQljEdugjYJmcvkDpjk
TLSH T1B884F298A379D7AEE17C07BC44A3151457F6A8233262FB524FDA34CA1D33B824D15AE3
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
154
Origin country :
n/a
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.Trojan.Win32.Save.a.6999.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Launching a process
Creating a file in the %temp% directory
Delayed writing of the file
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.
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/f4ed53be-ec1d-42a2-a7a8-9449dabc7903
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/879118
Signature
.NET source code contains potential unpacker
C2 URLs / IPs found in malware configuration
Found malware configuration
Initial sample is a PE file and has a suspicious name
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)
Performs DNS queries to domains with low reputation
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Sigma detected: Suspect Svchost Activity
Sigma detected: Suspicious Svchost Process
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 AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 511548 Sample: PO_#10292132.exe Startdate: 29/10/2021 Architecture: WINDOWS Score: 100 34 www.buddeltown.store 2->34 36 buddeltown.store 2->36 42 Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) 2->42 44 Found malware configuration 2->44 46 Malicious sample detected (through community Yara rule) 2->46 48 8 other signatures 2->48 11 PO_#10292132.exe 3 2->11         started        signatures3 process4 signatures5 58 Tries to detect virtualization through RDTSC time measurements 11->58 14 PO_#10292132.exe 11->14         started        process6 signatures7 60 Modifies the context of a thread in another process (thread injection) 14->60 62 Maps a DLL or memory area into another process 14->62 64 Sample uses process hollowing technique 14->64 66 Queues an APC in another process (thread injection) 14->66 17 explorer.exe 14->17 injected process8 dnsIp9 28 www.663198.com 168.76.72.1, 49822, 80 ULTRANETSERVICOSEMINTERNETLTDABR South Africa 17->28 30 www.jl129.com 168.76.79.19, 49816, 80 ULTRANETSERVICOSEMINTERNETLTDABR South Africa 17->30 32 15 other IPs or domains 17->32 38 System process connects to network (likely due to code injection or exploit) 17->38 40 Performs DNS queries to domains with low reputation 17->40 21 svchost.exe 17->21         started        signatures10 process11 signatures12 50 Self deletion via cmd delete 21->50 52 Modifies the context of a thread in another process (thread injection) 21->52 54 Maps a DLL or memory area into another process 21->54 56 Tries to detect virtualization through RDTSC time measurements 21->56 24 cmd.exe 1 21->24         started        process13 process14 26 conhost.exe 24->26         started       
Detection:
xloader
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Link:
https://mwdb.cert.pl/sample/28b77890ae9535db2da6bf03e7c41471d173b86fa67b907dafa38aede34fc148/
Threat name:
Win32.Trojan.FormBook
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Status:
Malicious
First seen:
2021-10-29 07:29:07 UTC
AV detection:
11 of 44 (25.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=fc3xrefosu25wlngx4b6prauohixhodpuz5za7npuofo3y2pyfea._file
Verdict:
malicious
Label(s):
formbook
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Result
Malware family:
xloader
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Score:
  10/10
Tags:
family:xloader campaign:op08 loader rat suricata
Link:
https://tria.ge/reports/211029-ja8yaahegn/
Behaviour
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
Suspicious use of SetThreadContext
Deletes itself
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Malware Config
C2 Extraction:
http://www.jjmpestman.com/op08/
Unpacked files
SH256 hash:
f60ee528f75066ab83ac0cabfbc064dacc001616f67e4e921ee0530439902428
MD5 hash:
89ef18606ae05e0dacbb3f2b1865cdd3
SHA1 hash:
29db8013fbb15ab280292b70744b713a9fa0ae81
Detections:
win_formbook_g0
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win_formbook_auto
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Link:
https://www.unpac.me/results/38be544c-537f-4cac-817e-924a84e5a9a3/
Parent samples :
6440e29b946df58c3cbd6ecdfb42ae88bb42d19b892bce094abf6834019c051f
28b77890ae9535db2da6bf03e7c41471d173b86fa67b907dafa38aede34fc148
5b353b83719d0a2f4a9f5ad11894c5c2129ae67e28a1f8677150a03623ab21f9
SH256 hash:
85f96bf27de475ae7d4320f21b5fed40c37783e9d5ec784a468fdf7f046a362d
MD5 hash:
3b4a51693a517060fc18cceb4d154703
SHA1 hash:
b333f5bc7d7b9d18f1869ce43ee0eddc000dc1f6
Link:
https://www.unpac.me/results/38be544c-537f-4cac-817e-924a84e5a9a3/
SH256 hash:
4d1ee061c817ea30ca4e461a4f44388662c1c1c2775be2b323858ddbc1679b35
MD5 hash:
1b6d3d31872537cc611ff4322ffc1099
SHA1 hash:
0108adafb207ce044bfb3f7933da45594c545bee
Link:
https://www.unpac.me/results/38be544c-537f-4cac-817e-924a84e5a9a3/
SH256 hash:
28b77890ae9535db2da6bf03e7c41471d173b86fa67b907dafa38aede34fc148
MD5 hash:
026df37a937471af093a3e8bc8636b7b
SHA1 hash:
57d0b25b3dd1d648c710c3ff5e44041d39d0cafc
Link:
https://www.unpac.me/results/38be544c-537f-4cac-817e-924a84e5a9a3/
Malware family:
XLoader
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/28b77890ae95/report/overview.html
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/28b77890ae9535db2da6bf03e7c41471d173b86fa67b907dafa38aede34fc148

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:pe_imphash
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Rule name:Skystars_Malware_Imphash
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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 28b77890ae9535db2da6bf03e7c41471d173b86fa67b907dafa38aede34fc148

(this sample)

  
Delivery method
Distributed via e-mail attachment

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