MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b79d2d02fe777cfd64723ad9b3935b30c00cbc75614fcadbf867cce88df4a8fd. 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: 15


Intelligence 15 IOCs YARA 2 File information Comments
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SHA256 hash: b79d2d02fe777cfd64723ad9b3935b30c00cbc75614fcadbf867cce88df4a8fd
SHA3-384 hash: 00bf657abcf650afa565c7d85993842012feb5a911070c0eb262b0930d29b468fa67dde45a59f3d28e8eae29f5a07365
SHA1 hash: e0e1dc469746f5e2e049ea4a93d9b09a9227b342
MD5 hash: 7eabab04e4a6fdd45238e32ed81e222c
humanhash: august-sad-edward-nebraska
File name:H4vBtZsi8xAKaMm.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'304'576 bytes
First seen:2022-01-28 14:03:59 UTC
Last seen:2022-01-28 16:25:18 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 24576:Xn0jA6ehzLFCgTrc1zKViGWIANSCqCmURrOrSO/8dVnJE0RujU88WyPZxG:X96e1d4171NNSCquRiFjD/8WyRk
Threatray 12'920 similar samples on MalwareBazaar
TLSH T18B55123426B69A2BDD3FD33C4772821C8FAA623AD117F67E6D84715C0952B408F52E63
File icon (PE):PE icon
dhash icon b2b2b29292b2b6b6 (7 x AgentTesla, 1 x Formbook)
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
171
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
H4vBtZsi8xAKaMm.exe
Verdict:
Malicious activity
Analysis date:
2022-01-28 14:07:54 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/a3abf338-aea6-4eaf-ab85-af6dce8637a4

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/225032/
Detection(s):
SecuriteInfo.com.Trojan.PackedNET.1121.32413.6591.UNOFFICIAL
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Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
DNS request
Sending a custom TCP request
Сreating synchronization primitives
Launching a process
Creating a file
Searching for synchronization primitives
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated packed
Link:
https://www.filescan.io/uploads/61f3f7d8c4bcf3287a6494e0/reports/dafb153e-e710-4bb8-8bcf-5de461a02aa5/overview
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/f65c9ae6-9884-4655-9185-f3b07fd04592
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/929678
Signature
.NET source code contains very large strings
Antivirus detection for URL or domain
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
Sigma detected: Bad Opsec Defaults Sacrificial Processes With Improper Arguments
Sigma detected: Suspicious Rundll32 Without Any CommandLine Params
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
Writes to foreign memory regions
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 562156 Sample: H4vBtZsi8xAKaMm.exe Startdate: 28/01/2022 Architecture: WINDOWS Score: 100 47 Malicious sample detected (through community Yara rule) 2->47 49 Antivirus detection for URL or domain 2->49 51 Multi AV Scanner detection for submitted file 2->51 53 7 other signatures 2->53 10 H4vBtZsi8xAKaMm.exe 3 2->10         started        process3 file4 33 C:\Users\user\...\H4vBtZsi8xAKaMm.exe.log, ASCII 10->33 dropped 63 Writes to foreign memory regions 10->63 65 Injects a PE file into a foreign processes 10->65 14 MSBuild.exe 10->14         started        signatures5 process6 signatures7 67 Modifies the context of a thread in another process (thread injection) 14->67 69 Maps a DLL or memory area into another process 14->69 71 Sample uses process hollowing technique 14->71 73 2 other signatures 14->73 17 explorer.exe 14->17 injected process8 signatures9 45 System process connects to network (likely due to code injection or exploit) 17->45 20 rundll32.exe 17->20         started        process10 signatures11 55 Modifies the context of a thread in another process (thread injection) 20->55 57 Maps a DLL or memory area into another process 20->57 59 Tries to detect virtualization through RDTSC time measurements 20->59 23 explorer.exe 3 149 20->23         started        27 explorer.exe 2 153 20->27         started        29 cmd.exe 1 20->29         started        process12 dnsIp13 35 bettingweb365.com 92.222.235.170, 49887, 80 OVHFR France 23->35 37 marymarinho.com 192.0.78.24, 49885, 80 AUTOMATTICUS United States 23->37 43 4 other IPs or domains 23->43 61 System process connects to network (likely due to code injection or exploit) 23->61 39 www.vzn2aai2qj.icu 27->39 41 www.deutscheno1.com 27->41 31 conhost.exe 29->31         started        signatures14 process15
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b79d2d02fe777cfd64723ad9b3935b30c00cbc75614fcadbf867cce88df4a8fd/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
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Status:
Malicious
First seen:
2022-01-26 09:47:57 UTC
File Type:
PE (.Net Exe)
Extracted files:
33
AV detection:
25 of 28 (89.29%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=w6os2ax6o56p2zdshlm3he23gdaazpdvmfh4vw7ym7gordpuvd6q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
0cd606362bbe747f3d0c0193675ce46ea2920fba28580b784f50a2969bbb0c27
Formbook
1d5e0028a025d76c09fbf798a8a3311ed7477c985b16ae8078b110e762778154
Formbook
2ed8aeaf73ee1a3caf7eb0be7814868c4100efbe1b021e2d964db3b638dc7f3c
Formbook
6d1ae3278059d592ae7c4426df9456553b8abfbc3bd90ce0f8d1792e94ae95c2
Formbook
8392408d685d10ddf024a7e4f47976e03a00fd787bd4ee0932766c4b9b278bc0
Formbook
ace8d85c2f02bd3d531cd8d609d23c6d35588ecce52f40a8d129b39a6b1d7723
Formbook
bc09ecf5cb6364f4d053ec0420282fa6e7a1649a8a5ca2af2ca933aa27f8b90c
Formbook
d8b05baee601302f22a561d0686689994296a4fa6ce256bcedb9bfa899553c07
Formbook
ec575e5cdf3da323c27e65f3042586173ca50ba0682b733a61f0b47f80c3004e
Formbook
+ 12'910 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:u1p5 rat spyware stealer trojan
Link:
https://tria.ge/reports/220128-rc975aeabm/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Formbook Payload
Formbook
Unpacked files
SH256 hash:
a8426d932ba2d0bd29c5572ae9e8c39cf25fdc3f6fe6dc8c2abc5946ab7dba61
MD5 hash:
a97174b3c216fc287252d28f0763bcfb
SHA1 hash:
7eb1fb3724490110069cdfc781e11bafc254e474
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/05db1f57-ea82-4de6-aeed-d0e4a4c78f8e/
SH256 hash:
86fe11dd34b015b6b1e825bf67f3ed926ff33a07abcd7379e6cf9cca3397e5c9
MD5 hash:
958eda4b064256764b00cd02960db778
SHA1 hash:
c8a937197f963a1eb92b8dd90934b77b82bc4c86
Link:
https://www.unpac.me/results/05db1f57-ea82-4de6-aeed-d0e4a4c78f8e/
SH256 hash:
79823e47436e129def4fba8ee225347a05b7bb27477fb1cc8be6dc9e9ce75696
MD5 hash:
39f524c1ab0eb76dfd79b2852e5e8c39
SHA1 hash:
428018e1701006744e34480b0029982a76d8a57d
Link:
https://www.unpac.me/results/05db1f57-ea82-4de6-aeed-d0e4a4c78f8e/
SH256 hash:
b79d2d02fe777cfd64723ad9b3935b30c00cbc75614fcadbf867cce88df4a8fd
MD5 hash:
7eabab04e4a6fdd45238e32ed81e222c
SHA1 hash:
e0e1dc469746f5e2e049ea4a93d9b09a9227b342
Link:
https://www.unpac.me/results/05db1f57-ea82-4de6-aeed-d0e4a4c78f8e/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.51
Link:
https://yomi.yoroi.company/submissions/b79d2d02fe777cfd64723ad9b3935b30c00cbc75614fcadbf867cce88df4a8fd

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

zip d3cc5286f50845f71f6ed6e400e90cbe47840b3939924c40424cadf3201524ad

Formbook

Executable exe b79d2d02fe777cfd64723ad9b3935b30c00cbc75614fcadbf867cce88df4a8fd

(this sample)

  
Dropped by
MD5 d6781591bd0437e8443b52a660615d4e
  
Dropped by
SHA256 d3cc5286f50845f71f6ed6e400e90cbe47840b3939924c40424cadf3201524ad
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/225032/

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