MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b799dc2f99d7cf59b9379f6ac7b32fe0852d2eab2386d20799c3085d38a576a5. 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: 17


Intelligence 17 IOCs YARA 1 File information Comments
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SHA256 hash: b799dc2f99d7cf59b9379f6ac7b32fe0852d2eab2386d20799c3085d38a576a5
SHA3-384 hash: 9d1040dfb3a6460fffe0948e9e6c153ccc8fcf05684966c3f5ddc76def0e7844d8dc089b00432fe6acecb8be32acb333
SHA1 hash: ff14299180b3ea21a88fc7e76f1e0cf27b82f5aa
MD5 hash: 1afad6774b537dde1e9aae03499b72b8
humanhash: angel-saturn-high-failed
File name:Doc#230823TRF.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:273'674 bytes
First seen:2023-08-28 13:07:28 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 61259b55b8912888e90f516ca08dc514 (1'059 x Formbook, 741 x AgentTesla, 427 x GuLoader)
ssdeep 6144:PYa63fd+0iNU3A+QJH4TBw+JK2Ltg1lHt3wbLmNfZD:PYNfd+0wmBw+rLtg1JR
Threatray 1'993 similar samples on MalwareBazaar
TLSH T1BB4412687AF0D5F7F0631B313FB867647AA5AE0704394E0F53614A28BE31782D1AD3A5
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter cocaman
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
267
Origin country :
CH CH
Vendor Threat Intelligence
Malware family:
formbook
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ID:
1
File name:
Doc#230823TRF.exe
Verdict:
Malicious activity
Analysis date:
2023-08-28 13:08:25 UTC
Tags:
formbook xloader stealer spyware
Link:
https://app.any.run/tasks/b5fb8541-e6ef-4fc2-ae4c-8999b578be5a

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
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Link:
https://www.capesandbox.com/analysis/444915/
Detection(s):
Sanesecurity.Malware.28885.BadCo.UNOFFICIAL
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Sanesecurity.Rogue.0hr.20230823-0335.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a file
Unauthorized injection to a recently created process
Restart of the analyzed sample
Launching a process
Сreating synchronization primitives
Launching cmd.exe command interpreter
Sending a custom TCP request
Setting browser functions hooks
Unauthorized injection to a system process
Unauthorized injection to a browser process
Gathering data
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
control lolbin overlay packed shell32
Link:
https://www.filescan.io/uploads/64ec9c347444d2eb09f28f14/reports/5d8baef9-bbc8-4df2-be7d-5727d8cf00ec/overview
Verdict:
Malicious
Labled as:
Win/malicious_confidence_100%
Link:
https://www.hybrid-analysis.com/sample/b799dc2f99d7cf59b9379f6ac7b32fe0852d2eab2386d20799c3085d38a576a5
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.
Malware family:
Formbook
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/350b512b-dc08-4b18-9ab3-6b22092a94fa
Result
Threat name:
FormBook, NSISDropper
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1298698
Signature
Antivirus / Scanner detection for submitted sample
Antivirus detection for dropped file
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Detected unpacking (changes PE section rights)
Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors)
Found malware configuration
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)
Modifies the prolog of user mode functions (user mode inline hooks)
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
Snort IDS alert for network traffic
System process connects to network (likely due to code injection or exploit)
Tries to detect virtualization through RDTSC time measurements
Uses netstat to query active network connections and open ports
Yara detected FormBook
Yara detected NSISDropper
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 1298698 Sample: Doc#230823TRF.exe Startdate: 28/08/2023 Architecture: WINDOWS Score: 100 36 Snort IDS alert for network traffic 2->36 38 Found malware configuration 2->38 40 Malicious sample detected (through community Yara rule) 2->40 42 10 other signatures 2->42 10 Doc#230823TRF.exe 18 2->10         started        process3 file4 28 C:\Users\user\AppData\Local\...\yctqehlfq.dll, PE32 10->28 dropped 54 Detected unpacking (changes PE section rights) 10->54 56 Found evasive API chain (may stop execution after reading information in the PEB, e.g. number of processors) 10->56 58 Maps a DLL or memory area into another process 10->58 60 Tries to detect virtualization through RDTSC time measurements 10->60 14 Doc#230823TRF.exe 10->14         started        signatures5 process6 signatures7 62 Modifies the context of a thread in another process (thread injection) 14->62 64 Maps a DLL or memory area into another process 14->64 66 Sample uses process hollowing technique 14->66 68 Queues an APC in another process (thread injection) 14->68 17 explorer.exe 6 14->17 injected process8 dnsIp9 30 www.ppirr.biz 91.195.240.123, 49733, 80 SEDO-ASDE Germany 17->30 32 www.thegiftcompany.shop 17->32 34 4 other IPs or domains 17->34 44 System process connects to network (likely due to code injection or exploit) 17->44 46 Uses netstat to query active network connections and open ports 17->46 21 NETSTAT.EXE 17->21         started        signatures10 process11 signatures12 48 Modifies the context of a thread in another process (thread injection) 21->48 50 Maps a DLL or memory area into another process 21->50 52 Tries to detect virtualization through RDTSC time measurements 21->52 24 cmd.exe 1 21->24         started        process13 process14 26 conhost.exe 24->26         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/b799dc2f99d7cf59b9379f6ac7b32fe0852d2eab2386d20799c3085d38a576a5/
Threat name:
Win32.Trojan.Leonem
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Status:
Malicious
First seen:
2023-08-22 23:42:12 UTC
File Type:
PE (Exe)
Extracted files:
3
AV detection:
20 of 23 (86.96%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w6m5yl4z27hvtojxt5vmpmzp4ccs2lvleodneb4zymef2offo2sq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
190090b95e7c9b2410ceb2149bb1c4369550963e56693e331bda3d020a0018e2
Formbook
21ccf1fad3e1a08f580d5f0d5aa2d13fb1a633aa1c68100d435628a437efb89b
Formbook
57b5c0581d2170ca86ffe5ec13269dc3b7813d46476d82ade07c7f49bd95eae6
Formbook
69b78313535ef2b6dc89c71b8c389907e8a02cccb5d9fdee05833d69aac84c0f
Formbook
6b3304337025f31f706e215c93b83d67ce344240c4130d51a784b06ebc5afa6e
Formbook
7a123e291c6c3bca48da92da78abd1157469dd5885f7af234e9114bcc5c8f061
Formbook
a142861cbfa6ccbce12de18b16812883dddd698d858353e985f9a29350652e31
Formbook
cbcfd7f5e01a53f530bebf71dc07ddac59b03d2ee0f5825f541e3bf668d6abc5
Formbook
+ 1'983 additional samples on MalwareBazaar
Result
Malware family:
formbook
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Score:
  10/10
Tags:
family:formbook campaign:sn26 rat spyware stealer trojan
Link:
https://tria.ge/reports/230828-qc7xbsbb36/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Suspicious use of SetThreadContext
Deletes itself
Loads dropped DLL
Formbook payload
Formbook
Unpacked files
SH256 hash:
e20e07a18ac4421af626276e1df7e8b9eb191fe91b26801e6793c7806a7adea5
MD5 hash:
6e4c5f9f2353b6fe13ed24025994154b
SHA1 hash:
336b61a84b66da6950e0a82487fee289ffebf867
Link:
https://www.unpac.me/results/2fdbde18-470f-4744-bb10-ecbf79bc99fe/
SH256 hash:
b799dc2f99d7cf59b9379f6ac7b32fe0852d2eab2386d20799c3085d38a576a5
MD5 hash:
1afad6774b537dde1e9aae03499b72b8
SHA1 hash:
ff14299180b3ea21a88fc7e76f1e0cf27b82f5aa
Link:
https://www.unpac.me/results/2fdbde18-470f-4744-bb10-ecbf79bc99fe/
Malware family:
FormBook
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Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/b799dc2f99d7/report/overview.html
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/b799dc2f99d7cf59b9379f6ac7b32fe0852d2eab2386d20799c3085d38a576a5

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:shellcode
Create hunting rule
Author:nex
Description:Matched shellcode byte patterns

File information

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

Malspam

Formbook

zip b9936bf91a41df2ac9731932cc6fd89937991bf8b5f3a057db1cc61902eba9b3

Formbook

Executable exe b799dc2f99d7cf59b9379f6ac7b32fe0852d2eab2386d20799c3085d38a576a5

(this sample)

  
Delivery method
Other
  
Dropped by
SHA256 b9936bf91a41df2ac9731932cc6fd89937991bf8b5f3a057db1cc61902eba9b3
Cape
Cape
https://www.capesandbox.com/analysis/444915/
  
Dropped by
MD5 f2b021e82dda20584a6a39c0bc64f61c

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