MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6fb6f79a9a5e483d1babb133a0ad5936915a50b98e40ce7413016e933d608b1b. 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: 14


Intelligence 14 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 6fb6f79a9a5e483d1babb133a0ad5936915a50b98e40ce7413016e933d608b1b
SHA3-384 hash: 7c9e1718d183c6d8967b1c9f7f9d107074738e313c9800bf5c63da59158e46fc0f9871ce36b6bc85cf7d54a51c1fee5c
SHA1 hash: 5524dbdb516d70c7914e381248b9cd2888aaed5b
MD5 hash: 69bd0272c774bf3a2d77065e19d49512
humanhash: angel-friend-green-carpet
File name:Invoice.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:723'456 bytes
First seen:2023-01-23 09:08:51 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'666 x AgentTesla, 19'479 x Formbook, 12'209 x SnakeKeylogger)
ssdeep 12288:FpnOnu0b+NoexY/kW25gqoz3ZwLel3SIoPeN4LOyLlUarbAtTlYk:DO3+NNx8kW2RgpwLU3+emLO4dYtTl
TLSH T123F46A41267B87E7C4B909B05038E57826A11CD18B6CB13ABDC67DBBACFA74F0096753
TrID 71.1% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
10.2% (.EXE) Win64 Executable (generic) (10523/12/4)
6.3% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
4.3% (.EXE) Win32 Executable (generic) (4505/5/1)
2.0% (.ICL) Windows Icons Library (generic) (2059/9)
Reporter adrian__luca
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
1
# of downloads :
171
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
342836.eml
Verdict:
Malicious activity
Analysis date:
2023-01-19 06:05:06 UTC
Tags:
formbook xloader trojan stealer
Link:
https://app.any.run/tasks/f861a04a-a2fa-48ef-9023-513e764c6a6d

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/355807/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Creating a file
Searching for synchronization primitives
Launching cmd.exe command interpreter
Forced shutdown of a system process
Unauthorized injection to a system process
Verdict:
No Threat
Threat level:
  2/10
Confidence:
75%
Tags:
packed
Link:
https://www.filescan.io/uploads/63ce4eb596add6d1cf482ebe/reports/4164bc0b-7247-48b6-9a6f-dc0cae7a1f88/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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/f253c1bf-3226-4e75-a740-87139cd9e14e
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1156848
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Initial sample is a PE file and has a suspicious name
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)
Modifies the prolog of user mode functions (user mode inline hooks)
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
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
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 789580 Sample: Invoice.exe Startdate: 23/01/2023 Architecture: WINDOWS Score: 100 31 www.908726.com 2->31 39 Malicious sample detected (through community Yara rule) 2->39 41 Antivirus detection for URL or domain 2->41 43 Multi AV Scanner detection for submitted file 2->43 45 8 other signatures 2->45 11 Invoice.exe 3 2->11         started        signatures3 process4 file5 29 C:\Users\user\AppData\...\Invoice.exe.log, ASCII 11->29 dropped 57 Tries to detect virtualization through RDTSC time measurements 11->57 59 Injects a PE file into a foreign processes 11->59 15 Invoice.exe 11->15         started        signatures6 process7 signatures8 61 Modifies the context of a thread in another process (thread injection) 15->61 63 Maps a DLL or memory area into another process 15->63 65 Sample uses process hollowing technique 15->65 67 Queues an APC in another process (thread injection) 15->67 18 explorer.exe 1 1 15->18 injected process9 dnsIp10 33 www.essexlashes.co.uk 81.17.29.150, 49781, 80 PLI-ASCH Switzerland 18->33 35 natroredirect.natrocdn.com 85.159.66.93, 49761, 80 CIZGITR Turkey 18->35 37 2 other IPs or domains 18->37 47 System process connects to network (likely due to code injection or exploit) 18->47 49 Performs DNS queries to domains with low reputation 18->49 22 wscript.exe 18->22         started        signatures11 process12 signatures13 51 Modifies the context of a thread in another process (thread injection) 22->51 53 Maps a DLL or memory area into another process 22->53 55 Tries to detect virtualization through RDTSC time measurements 22->55 25 cmd.exe 1 22->25         started        process14 process15 27 conhost.exe 25->27         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/6fb6f79a9a5e483d1babb133a0ad5936915a50b98e40ce7413016e933d608b1b/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2023-01-18 04:38:05 UTC
File Type:
PE (.Net Exe)
Extracted files:
23
AV detection:
27 of 39 (69.23%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=n63ppgu2lzed2g5lwez2blkzg2ivuufzrzam45atafxjgplarmnq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:be09 rat spyware stealer trojan
Link:
https://tria.ge/reports/230123-k4gassec6x/
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
Deletes itself
Formbook payload
Formbook
Unpacked files
SH256 hash:
387503f5696515f5dca6ebb4d9e82dc974c151b63d5f05a418d1878c51957b14
MD5 hash:
36239e3d876ac3d515c18282f7e9d18f
SHA1 hash:
9a09d29a3a42ab7da50dd10b78eda2382c377d7e
Detections:
FormBook
Create hunting rule
win_formbook_w0
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/f0830900-69f0-44b6-8c22-230a2baf907a/
Parent samples :
6fb6f79a9a5e483d1babb133a0ad5936915a50b98e40ce7413016e933d608b1b
48911d98758652dda9e43d0a5cb1a7e520f708606057511e370a211e129f45d6
b456c720f60a7046db4cbc7aac9f66a090f65207d6db9e32665fb20f1273eea2
SH256 hash:
c8868d3192e9575a0da7d23bfcea5574e61acf9a2080f5a10ae816fbc2995dec
MD5 hash:
def3e9d4945d635dd6722e4c93413509
SHA1 hash:
f29efc91758945a2ee9a92f1860b794dbbd20dc7
Link:
https://www.unpac.me/results/f0830900-69f0-44b6-8c22-230a2baf907a/
SH256 hash:
1c0072bd0c8fbf0e27d145a0ee7e34428936c2ddeba929d3f60e352891e7e0c6
MD5 hash:
b2d0625c46714e40a6a38238659ea9ed
SHA1 hash:
dc43d5d539eab67b7e3109d0e4894e099a1a18f8
Link:
https://www.unpac.me/results/f0830900-69f0-44b6-8c22-230a2baf907a/
SH256 hash:
c95487e6fda1487e4e460b54372e39228de403396830895e912cd3d2a3d728bf
MD5 hash:
287d85c02cf9f6425912cbbfe0dc7aca
SHA1 hash:
504f85fe310408b8ad6e101893309b092a646a50
Link:
https://www.unpac.me/results/f0830900-69f0-44b6-8c22-230a2baf907a/
SH256 hash:
ab2f8dbc2b147528cecac6ea1a8886951c424be0b2026743b39d97f0cbabb04c
MD5 hash:
77ab42f4bbbf4565846eb8953192d71f
SHA1 hash:
3c662c756cc31867c0473716a74e777a65ced550
Link:
https://www.unpac.me/results/f0830900-69f0-44b6-8c22-230a2baf907a/
SH256 hash:
6fb6f79a9a5e483d1babb133a0ad5936915a50b98e40ce7413016e933d608b1b
MD5 hash:
69bd0272c774bf3a2d77065e19d49512
SHA1 hash:
5524dbdb516d70c7914e381248b9cd2888aaed5b
Link:
https://www.unpac.me/results/f0830900-69f0-44b6-8c22-230a2baf907a/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.45
Link:
https://yomi.yoroi.company/submissions/6fb6f79a9a5e483d1babb133a0ad5936915a50b98e40ce7413016e933d608b1b

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
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.

Malspam

Formbook

Executable exe 6fb6f79a9a5e483d1babb133a0ad5936915a50b98e40ce7413016e933d608b1b

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/355807/

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