MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b791ce91936d65f90d9ca761c1999ea8330b66d3c3aede92564395d4778b5955. 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: 11


Intelligence 11 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b791ce91936d65f90d9ca761c1999ea8330b66d3c3aede92564395d4778b5955
SHA3-384 hash: 29269795d3da7251b64ea95d1d30801dbcd539acffcd63503bbca688b67b296cca943005fcc5395e5bfaecf549871692
SHA1 hash: b36bfb26a435b044445d9ce3bab91b3bebf5e967
MD5 hash: 4b55cb7e5402691815a7b61d3c2a1ff8
humanhash: bulldog-echo-paris-one
File name:010-116.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:487'936 bytes
First seen:2020-10-17 06:35:21 UTC
Last seen:2020-10-17 08:03:51 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'740 x AgentTesla, 19'599 x Formbook, 12'241 x SnakeKeylogger)
ssdeep 6144:mrr0Dx9dBuk7Rxpq8BSvMPIeQFIna2xQFlHqjO7K0o7pvJ2n99/TL28VMpAW4p:CgD/3Jrpq+AKa2e/HrG0oFB2h2wM4
Threatray 2'728 similar samples on MalwareBazaar
TLSH 5FA4C0B17D92586ECA6F077550A981C1FAB616C73FA5CB0E719F430C0E00A2BEB5325B
Reporter abuse_ch
Tags:exe FormBook


Avatar
abuse_ch
Malspam distributing Formbook:

HELO: slot0.bur-ibserte.com
Sending IP: 45.95.169.122
From: Account <info@bur-ibserte.com>
Reply-To: Account <mail.reply@mail.com>
Subject: ORDEN
Attachment: 010-116.zip (contains "010-116.exe")

Intelligence

File Origin
# of uploads :
2
# of downloads :
92
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/72451/
Detection(s):
SecuriteInfo.com.Trojan.Siggen10.38266.25719.23132.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sending a UDP request
Creating a file in the %temp% subdirectories
Creating a window
Creating a file
Creating a process from a recently created file
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a recently created process
Unauthorized injection to a recently created process by context flags manipulation
Unauthorized injection to a system process
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/494283
Signature
.NET source code contains potential unpacker
.NET source code contains very large array initializations
Allocates memory in foreign processes
Antivirus / Scanner detection for submitted sample
Injects a PE file into a foreign processes
Machine Learning detection for sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Tries to detect virtualization through RDTSC time measurements
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/b791ce91936d65f90d9ca761c1999ea8330b66d3c3aede92564395d4778b5955/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2020-10-16 03:23:24 UTC
AV detection:
24 of 29 (82.76%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=w6i45emtnvs7sdm4u5q4dgm6vazqwzwtyoxn5eswiok5i54llfkq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
netwirerc
Create hunting rule
Similar samples:
0982a348bad7e99222ac6ec6c6dc2c113eb8adff8785bd1f371c5bc90b0025b3
Formbook
2f074d479236e1b4b36733f1e071d6c053a135025cbc62ccc233776b23604390
Formbook
41e247af1c9e83534cd1a251b618432759435c3f9c9dfd2c8760f712a6ccc5a4
Formbook
6d793847fa7272019425c00c17e6f84f719a74a926219a6f6a9c7d96f033fc48
Formbook
73c2d8d44daa16a7b406b82cd5201483ae40404037e7a543ad91689cbced81ad
Formbook
73c740cf8efc312c3fed42aceee4f4513b8ce620aaf31793676f8de2810fdadb
Formbook
99c4f75948b26af511bfa055db8d18567a3d662107e35e91102b5576f02acb84
Formbook
a6fd278a82dad870444a8d93e3c05accdfaef779460c2f3777d9ef2441620a41
Formbook
b7f9546fa9fb928d856b69a70174d693a84c641ad193e88e48c07cdb92751e03
Formbook
fc0d990ef758b78feb650b93c761b3f0fe5daa30d1fbcc77a424eac49ca8cc4d
Formbook
+ 2'718 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
rat trojan spyware stealer family:formbook
Link:
https://tria.ge/reports/201017-l167nz4812/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Loads dropped DLL
Executes dropped EXE
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.crazyenergyguy.com/dmr/
Unpacked files
SH256 hash:
b791ce91936d65f90d9ca761c1999ea8330b66d3c3aede92564395d4778b5955
MD5 hash:
4b55cb7e5402691815a7b61d3c2a1ff8
SHA1 hash:
b36bfb26a435b044445d9ce3bab91b3bebf5e967
Link:
https://www.unpac.me/results/55aef3e6-1c02-4670-baaa-0d63be559dd1/
SH256 hash:
e40466cbb1e0dc5f940da8ee425ccb7e0c8e9053cf58ac8206a0bcb89604076f
MD5 hash:
0f0736b62889cc3fb26950803a0f62ff
SHA1 hash:
34973f9628c8353e7d844b102e35053266d62d57
Link:
https://www.unpac.me/results/55aef3e6-1c02-4670-baaa-0d63be559dd1/
SH256 hash:
19d9922060be89a70b76e5c0056e751f1baa5d41819235c92cf4f5d7668e1267
MD5 hash:
811864a0b06c529af894a7fec6ddbf47
SHA1 hash:
d35b82933eb06a6ec60e8cbbdb65eb6cdcaeb6d2
Link:
https://www.unpac.me/results/55aef3e6-1c02-4670-baaa-0d63be559dd1/
Parent samples :
afa2f55e149097f9b250142bbfd94d9d56d10649c96adb079fdb0dfdac7c6660
69e2ae11e1b5cbe120bf02301191a1cf05e87fc09b09d63bd782abbf3615d05d
0b778873c94f6bc89a40294c0e85a38ab82509260cd2a2e8b73d00c5c90e8757
7ddfa6f44a60f4b894321f6977f8121cfb371c3c61ac872c58ba61fd5ee13deb
SH256 hash:
f8bee4108a324df32ad5a2ebafa6b7f411402a21e2598cf9db66486970f80fdd
MD5 hash:
a92da98ff6f5ae608503d074617bcc2a
SHA1 hash:
d3eafcccca011bb3a7a5ae52dd9704ceafcde472
Link:
https://www.unpac.me/results/55aef3e6-1c02-4670-baaa-0d63be559dd1/
SH256 hash:
45cebff66bfc33e7c397fdc3a540791717ad2021d21549f4daa6eadd40ad4015
MD5 hash:
044de68d712fa2c2283a057eb20e9622
SHA1 hash:
853c7b7553539e0cce3c337b221d0726a7879b5d
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/55aef3e6-1c02-4670-baaa-0d63be559dd1/
Parent samples :
a6fd278a82dad870444a8d93e3c05accdfaef779460c2f3777d9ef2441620a41
4323dbb489f82a5a4906fbc6e0dc37a6589dc7b073f2fa0a569b7d3409314e15
0982a348bad7e99222ac6ec6c6dc2c113eb8adff8785bd1f371c5bc90b0025b3
73c740cf8efc312c3fed42aceee4f4513b8ce620aaf31793676f8de2810fdadb
b791ce91936d65f90d9ca761c1999ea8330b66d3c3aede92564395d4778b5955
273e14710bfe15975737d9e213b6007a29cc795c993b6b121c745581ec1c4b96
540254a20d7d4aec2508a9db7e1fdb484ebc5bcec6ff72c919b17b5f0dbabdd7
a4d4e093896e53df94a4ffb14632be70329334ac705925a975fa499ac7ee0a89
e812ca08bf2f1a1ea83facfaab349a8fa9d9fd88607d2b61a81423bb3f992175
1c8686106ff3eebb3b99082e117bf8b3bcf5a54b733c2a5eb8ede2b89ee7c4fb
3864dd603fd4616753b80ec6146bccaac77ee9ec7590d088d121dc15db1dc98a
83a00cced5b83593db2ff0ce7f23937ba5b836b28969c1a0d481a6e9fbea5f53
f24849d70670b5448e96f02fe8bc12328bee2922be60f70ec8121531778f0d05
1e510326528933cca881fd142e4840c5256a25384310c77ab7dc9f38e390430c
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b791ce91936d65f90d9ca761c1999ea8330b66d3c3aede92564395d4778b5955

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:Formbook
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:autogenerated rule brought to you by yara-signator

File information

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

Malspam

Formbook

zip 3f0cfbc9890223502169ef67256a9731d803fedddd3be2b28bc8289f425d8078

Formbook

Executable exe b791ce91936d65f90d9ca761c1999ea8330b66d3c3aede92564395d4778b5955

(this sample)

  
Dropped by
MD5 850944c199843d039390a1357c761e60
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/72451/
  
Dropped by
SHA256 3f0cfbc9890223502169ef67256a9731d803fedddd3be2b28bc8289f425d8078

Comments