MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 99b4df04fc5236a12bcf96a4c6ec797b2555189915050d7a0a1704f4f69ab770. 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 3 File information Comments

SHA256 hash: 99b4df04fc5236a12bcf96a4c6ec797b2555189915050d7a0a1704f4f69ab770
SHA3-384 hash: 02189b68295145fb343b46966d07d33b50f96602e26e61ae7026008219b835cf1d2d387a320ce60c5faf9c6b7e26c056
SHA1 hash: 6995f2e5f4544b3e99489364bccc56084198c61d
MD5 hash: 7700a0d1b07e63f054a730fbf9156ef0
humanhash: south-zebra-music-fish
File name:AutoInstall.exe
Download: download sample
Signature Formbook
File size:4'344'320 bytes
First seen:2022-03-21 12:06:00 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 99c2cae0b7316add27de679470515124 (3 x ArkeiStealer, 2 x Formbook, 2 x RaccoonStealer)
ssdeep 98304:IDWrdQJJ6qOobDtlLCSvKBXRAtiX2CVQmYRx6uiNnA9gEEtwPpAK3q2M:D6KPktlvIAtSNn6gFtYrzM
Threatray 298 similar samples on MalwareBazaar
TLSH T1B8165771D910E0B6EFF32278F4AB245C1948A43486CFB99B639D0CD54ADB2BCC91F529
Reporter @tech_skeech
Tags:exe FormBook

Intelligence


File Origin
# of uploads :
1
# of downloads :
237
Origin country :
RO RO
Mail intelligence
No data
Vendor Threat Intelligence
Detection:
mimikatz lsass mdmp
Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Launching a process
Using the Windows Management Instrumentation requests
–°reating synchronization primitives
DNS request
Sending an HTTP GET request
Sending a custom TCP request
Searching for synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Unauthorized injection to a system process
Result
Malware family:
n/a
Score:
  6/10
Tags:
n/a
Behaviour
MalwareBazaar
MeasuringTime
CheckCmdLine
EvasionQueryPerformanceCounter
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
control.exe greyware overlay packed
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:
Unknown
Detection:
malicious
Classification:
troj.evad
Score:
76 / 100
Signature
.NET source code contains potential unpacker
Allocates memory in foreign processes
Injects a PE file into a foreign processes
May check the online IP address of the machine
Multi AV Scanner detection for submitted file
PE file contains section with special chars
Queries sensitive video device information (via WMI, Win32_VideoController, often done to detect virtual machines)
Writes to foreign memory regions
Behaviour
Behavior Graph:
Threat name:
Win32.Trojan.Zenpak
Status:
Malicious
First seen:
2022-03-21 12:06:14 UTC
File Type:
PE (Exe)
AV detection:
17 of 27 (62.96%)
Threat level:
  5/5
Result
Malware family:
n/a
Score:
  6/10
Tags:
n/a
Behaviour
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Looks up external IP address via web service
Unpacked files
SH256 hash:
698e4beeba26363e632cbbb833fc8000cf85ab5449627bf0edc8203f05a64fa1
MD5 hash:
11bbdf80d756b3a877af483195c60619
SHA1 hash:
99aca4f325d559487abc51b0d2ebd4dca62c9462
SH256 hash:
0af2c53aceaa4a9a119fb35ab341cdbea221973785768c56b497ae355911638a
MD5 hash:
1540cb099bb6b4ab61f5cf023d9daa53
SHA1 hash:
11b7cee7cd70b9bda79b59841c83b84dfbdea15b
SH256 hash:
99b4df04fc5236a12bcf96a4c6ec797b2555189915050d7a0a1704f4f69ab770
MD5 hash:
7700a0d1b07e63f054a730fbf9156ef0
SHA1 hash:
6995f2e5f4544b3e99489364bccc56084198c61d

YARA Signatures


MalareBazaar uses YARA rules from several public and non-public repositories, such as Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious proccess dumps they may create. Please note that only results from TLP:WHITE rules are being displayeyd.

Rule name:extracted_at_0x44b
Author:cb
Description:sample - file extracted_at_0x44b.exe
Reference:Internal Research
Rule name:pe_imphash
Rule name:Skystars_Malware_Imphash
Author:Skystars LightDefender
Description:imphash

File information


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

Web download

Formbook

Executable exe 99b4df04fc5236a12bcf96a4c6ec797b2555189915050d7a0a1704f4f69ab770

(this sample)

  
Delivery method
Distributed via web download

Comments