MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 99bc21547794358546f999eebf0b2080fb21d7a3ec4a27c2d2bb987b362f89cd. 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 4 File information Comments 1
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 99bc21547794358546f999eebf0b2080fb21d7a3ec4a27c2d2bb987b362f89cd
SHA3-384 hash: 20ae9c2a248a8154de6b74b85680be7252bcd05406a34841d059be6dff8771c45135d387115bbd2200b69cd21b462b86
SHA1 hash: e0cf961c1839d243718fd575901aa2c6df060a91
MD5 hash: ad7de2beb642e64ea26ee3f8b50efab1
humanhash: alaska-tennis-victor-sweet
File name:ad7de2beb642e64ea26ee3f8b50efab1
Download: download sample
Signature Formbook
Create hunting rule
File size:393'240 bytes
First seen:2022-06-27 09:43:57 UTC
Last seen:2022-06-27 11:19:09 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'658 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 6144:8tv3bWQpEjlnJb6EWIMqY/i7borJbdldleYbaiaI52:EveW5wbol55Pa9Q2
TLSH T1FB84AE1BBB9C9B4CC7089AB5B1F3463403A1DF972631CA0578C4FEAD097136DAA447D9
TrID 69.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
9.9% (.EXE) Win64 Executable (generic) (10523/12/4)
6.2% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.7% (.EXE) Win16 NE executable (generic) (5038/12/1)
4.2% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon 6ccccc9cc4d8e8f4 (41 x Formbook, 34 x AgentTesla, 3 x AveMariaRAT)
Reporter zbetcheckin
Tags:32 exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
233
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/283530/
Result
Verdict:
Malware
Maliciousness:

Behaviour
DNS request
Sending a custom TCP request
Launching a process
Creating a file
Сreating synchronization primitives
Launching cmd.exe command interpreter
Searching for synchronization primitives
Reading critical registry keys
Sending an HTTP GET request
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
obfuscated overlay packed
Link:
https://www.filescan.io/uploads/62b97be57e9a4f0a86e82bf4/reports/d42abef5-630a-494b-af92-1a29a5efcb52/overview
Result
Verdict:
UNKNOWN
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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/82e9cd8b-8c6b-4f0b-94a5-b22a54bc1d00
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.spyw.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1020299
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code references suspicious native API functions
Allocates memory in foreign processes
Antivirus detection for URL or domain
Benign windows process drops PE files
C2 URLs / IPs found in malware configuration
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
Icon mismatch, binary includes an icon from a different legit application in order to fool users
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
Performs DNS queries to domains with low reputation
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
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 652801 Sample: f5NahEPFL4 Startdate: 27/06/2022 Architecture: WINDOWS Score: 100 51 www.cam4ok.com 2->51 53 www.saketotomoni.com 2->53 67 Snort IDS alert for network traffic 2->67 69 Malicious sample detected (through community Yara rule) 2->69 71 Antivirus detection for URL or domain 2->71 73 7 other signatures 2->73 10 f5NahEPFL4.exe 1 2->10         started        signatures3 process4 file5 41 C:\Users\user\AppData\...\f5NahEPFL4.exe.log, ASCII 10->41 dropped 77 Writes to foreign memory regions 10->77 79 Allocates memory in foreign processes 10->79 81 Injects a PE file into a foreign processes 10->81 83 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 10->83 14 cvtres.exe 10->14         started        signatures6 process7 signatures8 85 Modifies the context of a thread in another process (thread injection) 14->85 87 Maps a DLL or memory area into another process 14->87 89 Sample uses process hollowing technique 14->89 91 2 other signatures 14->91 17 rundll32.exe 1 12 14->17         started        21 explorer.exe 1 6 14->21 injected process9 dnsIp10 43 192.168.2.1 unknown unknown 17->43 55 System process connects to network (likely due to code injection or exploit) 17->55 57 Tries to steal Mail credentials (via file / registry access) 17->57 59 Tries to harvest and steal browser information (history, passwords, etc) 17->59 65 3 other signatures 17->65 24 cmd.exe 2 17->24         started        27 cmd.exe 1 17->27         started        45 www.3dayofferf648.com 103.224.182.242, 49888, 49889, 80 TRELLIAN-AS-APTrellianPtyLimitedAU Australia 21->45 47 www.gaselettricosproviderita.com 185.53.179.93, 49872, 80 TEAMINTERNET-ASDE Germany 21->47 49 23 other IPs or domains 21->49 39 C:\Users\user\...\5jrdkt08k6sptdax.exe, PE32 21->39 dropped 61 Benign windows process drops PE files 21->61 63 Performs DNS queries to domains with low reputation 21->63 29 5jrdkt08k6sptdax.exe 1 21->29         started        31 autoconv.exe 21->31         started        file11 signatures12 process13 signatures14 75 Tries to harvest and steal browser information (history, passwords, etc) 24->75 33 conhost.exe 24->33         started        35 conhost.exe 27->35         started        37 conhost.exe 29->37         started        process15
Detection:
xloader
Create hunting rule
Link:
https://mwdb.cert.pl/sample/99bc21547794358546f999eebf0b2080fb21d7a3ec4a27c2d2bb987b362f89cd/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-06-27 08:32:30 UTC
File Type:
PE (.Net Exe)
Extracted files:
12
AV detection:
22 of 26 (84.62%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=tg6ccvdxsq2ykrxzthxl6czaqd5sdv5d5rfcpqwsxomhwnrprhgq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:2a2s loader rat suricata
Link:
https://tria.ge/reports/220627-lqgj3sabgm/
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
Xloader Payload
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
Unpacked files
SH256 hash:
6211df445a35f00e3dbd68ab7266813af67a9ed51b4c9d573539e07023028e42
MD5 hash:
dd5f9fadd3fb12950a9e9cbbbaa5d010
SHA1 hash:
e0dabd8b7734c3fd62b33c850474bbd978c072e4
Detections:
XLoader
Create hunting rule
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/1b151b3b-7e97-4572-8826-4b537bc52307/
SH256 hash:
fbd338bb46e2185ffa2f68666f4d99cc4238daf8cbe91d32a629290e8e18c5cf
MD5 hash:
6e1a6809c5c94ffcb163890c0d5e4cb9
SHA1 hash:
486781f6e52e15b320d61dcce3bac25537c2e491
Link:
https://www.unpac.me/results/1b151b3b-7e97-4572-8826-4b537bc52307/
SH256 hash:
99bc21547794358546f999eebf0b2080fb21d7a3ec4a27c2d2bb987b362f89cd
MD5 hash:
ad7de2beb642e64ea26ee3f8b50efab1
SHA1 hash:
e0cf961c1839d243718fd575901aa2c6df060a91
Link:
https://www.unpac.me/results/1b151b3b-7e97-4572-8826-4b537bc52307/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/99bc21547794358546f999eebf0b2080fb21d7a3ec4a27c2d2bb987b362f89cd

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:MALWARE_Win_zgRAT
Create hunting rule
Author:ditekSHen
Description:Detects zgRAT
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:pe_imphash
Create hunting rule
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.

Web download

Formbook

Executable exe 99bc21547794358546f999eebf0b2080fb21d7a3ec4a27c2d2bb987b362f89cd

(this sample)

  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/2250877/
Cape
Cape
https://www.capesandbox.com/analysis/283530/

Comments


Avatar
zbet commented on 2022-06-27 09:44:09 UTC

url : hxxp://162.216.243.62/_msoffice10/vbc.exe