MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 345642b76b3a499884c227983fb3a9f9c9ea9078b34cd577ee674d260aa1ccf6. 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 2 File information Comments
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SHA256 hash: 345642b76b3a499884c227983fb3a9f9c9ea9078b34cd577ee674d260aa1ccf6
SHA3-384 hash: beb2da8d9f0033cb91df6c6fc7666003399330ff39fae0f80b833c320963b89275db6842a14cd8b53b49ccbf924a01dd
SHA1 hash: 9f5d2096ff2ddc4c92ccd23199c623f4c2f7bccb
MD5 hash: ed56e2d1acea1fe103e4d72866909e70
humanhash: blossom-charlie-music-kitten
File name:invoice.doc1545122022.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:540'672 bytes
First seen:2022-05-12 07:09:32 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'652 x AgentTesla, 19'463 x Formbook, 12'204 x SnakeKeylogger)
ssdeep 12288:gIjoqjRdtVr7TEeEkLzDV2DGSYJsj6UhuY3UCCe:gApFdbr/ETkLX0Gk7K
Threatray 15'389 similar samples on MalwareBazaar
TLSH T130B4222A5678A336CD7F0BB2CD2868EC43B5AD16DD11F3132CA4B0ED063DF564861A1B
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% (.EXE) Win16/32 Executable Delphi generic (2072/23)
Reporter GovCERT_CH
Tags:exe FormBook xloader

Intelligence

File Origin
# of uploads :
1
# of downloads :
229
Origin country :
n/a
Vendor Threat Intelligence
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/269908/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
obfuscated packed replace.exe
Link:
https://www.filescan.io/uploads/627cb2ec89dc6403e777555c/reports/c11a6ec8-0752-4545-8472-3a1bde1ecc24/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
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Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/0c0c65a6-3590-4a83-8869-dad66f61a8f4
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/992440
Signature
.NET source code contains method to dynamically call methods (often used by packers)
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Found 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)
Multi AV Scanner detection for submitted file
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
Snort IDS alert for network traffic
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: 624932 Sample: invoice.doc1545122022.exe Startdate: 12/05/2022 Architecture: WINDOWS Score: 100 31 www.mavrocostas.com 2->31 33 mavrocostas.com 2->33 41 Snort IDS alert for network traffic 2->41 43 Found malware configuration 2->43 45 Malicious sample detected (through community Yara rule) 2->45 47 10 other signatures 2->47 11 invoice.doc1545122022.exe 3 2->11         started        signatures3 process4 file5 29 C:\Users\...\invoice.doc1545122022.exe.log, ASCII 11->29 dropped 59 Tries to detect virtualization through RDTSC time measurements 11->59 61 Injects a PE file into a foreign processes 11->61 15 invoice.doc1545122022.exe 11->15         started        signatures6 process7 signatures8 63 Modifies the context of a thread in another process (thread injection) 15->63 65 Maps a DLL or memory area into another process 15->65 67 Sample uses process hollowing technique 15->67 69 Queues an APC in another process (thread injection) 15->69 18 explorer.exe 15->18 injected process9 dnsIp10 35 www.giblingse.com 66.29.155.228, 49830, 80 ADVANTAGECOMUS United States 18->35 37 www.lostcrypto.info 18->37 39 4 other IPs or domains 18->39 49 System process connects to network (likely due to code injection or exploit) 18->49 22 wlanext.exe 18->22         started        signatures11 process12 signatures13 51 Self deletion via cmd delete 22->51 53 Modifies the context of a thread in another process (thread injection) 22->53 55 Maps a DLL or memory area into another process 22->55 57 Tries to detect virtualization through RDTSC time measurements 22->57 25 cmd.exe 1 22->25         started        process14 process15 27 conhost.exe 25->27         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/345642b76b3a499884c227983fb3a9f9c9ea9078b34cd577ee674d260aa1ccf6/
Threat name:
ByteCode-MSIL.Trojan.FormBook
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Status:
Malicious
First seen:
2022-05-12 01:19:48 UTC
File Type:
PE (.Net Exe)
Extracted files:
13
AV detection:
21 of 26 (80.77%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=grlefn3lhjezrbgce6md7m5j7he6vedywngnk57om5gsmcvbzt3a._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
1fa17f6996cc7efdabe3099d0543ec457cff4f54d246c089d6d7dd8e72eee1c9
Formbook
46956dd9cd5e3f62c79127e5e8bcd3b420695a0112df256aa07364bc6a32e697
Formbook
4ae196ba20257faedeeb359b17525e17cd4eff1b25eb171ca7c2a93ea3cd526c
Formbook
532c1d4404b76c16ac1e3a39bd1c1f9588f9ea9ced3ad01d6dfdc2f239996229
Formbook
bea7dde650c823aa2887bc7065abd818c02e573c041ea69c1ea60c43fe1a79df
Formbook
d7dc569e0cf8cc6afc0a4a922263195ea12051b1db428fcf9fba724d90261a5e
Formbook
eba97a314b1c02ecdd75fe691c6883b214dc0b239d0ba39b7d578162b5218ad0
Formbook
f156099a9282dcdcab3acbf57c50bc1d0121a6e9714d43ba69ab9934ab0d9439
Formbook
+ 15'379 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:formbook family:xloader campaign:83g4 loader persistence rat spyware stealer suricata trojan
Link:
https://tria.ge/reports/220512-hzc2gaahf6/
Behaviour
Enumerates system info in registry
Modifies Internet Explorer settings
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
Drops file in Program Files directory
Suspicious use of SetThreadContext
Adds Run key to start application
Deletes itself
Reads user/profile data of web browsers
Adds policy Run key to start application
Xloader Payload
Formbook
Xloader
suricata: ET MALWARE FormBook CnC Checkin (GET)
suricata: ET MALWARE FormBook CnC Checkin (POST) M2
Unpacked files
SH256 hash:
4191fbba733adde528188abb317f9d0f0f80c46d8acdd2c1a97db155cf319845
MD5 hash:
b2e6e76aba1fc5db4cae28fd2146d5da
SHA1 hash:
3c94465d694d624cdfd8beee07bb13212f7c469e
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/a77a5516-5ae0-4960-8035-631d23f0bf13/
Parent samples :
46956dd9cd5e3f62c79127e5e8bcd3b420695a0112df256aa07364bc6a32e697
345642b76b3a499884c227983fb3a9f9c9ea9078b34cd577ee674d260aa1ccf6
SH256 hash:
c206122a7336385be557580c114ac0923192f61bc8f77aa58c898135438399f9
MD5 hash:
6c9e813248a01432890c476813d210b8
SHA1 hash:
fd54aa3af58fc3a88cb3fd6753d773cd6c51b7f8
Link:
https://www.unpac.me/results/a77a5516-5ae0-4960-8035-631d23f0bf13/
SH256 hash:
883bab433e084d42d2111402f6ca1062f12baf56726f46c37af9bcecb6fb5a92
MD5 hash:
bf3160ba713fd25c749e5c9463e122bd
SHA1 hash:
6081a4fbfc4ba5e5fa00ad8ae868a81d0b17634a
Link:
https://www.unpac.me/results/a77a5516-5ae0-4960-8035-631d23f0bf13/
SH256 hash:
85161d2c745694d60ddbee1208681b45ae32c612db6ef524f41f005c49d2608d
MD5 hash:
7300435f2b80ad79ea8df9b65195d375
SHA1 hash:
199eb0d09bbc6547a0fdf918c6a2dd192159744c
Link:
https://www.unpac.me/results/a77a5516-5ae0-4960-8035-631d23f0bf13/
SH256 hash:
345642b76b3a499884c227983fb3a9f9c9ea9078b34cd577ee674d260aa1ccf6
MD5 hash:
ed56e2d1acea1fe103e4d72866909e70
SHA1 hash:
9f5d2096ff2ddc4c92ccd23199c623f4c2f7bccb
Link:
https://www.unpac.me/results/a77a5516-5ae0-4960-8035-631d23f0bf13/
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/345642b76b3a499884c227983fb3a9f9c9ea9078b34cd577ee674d260aa1ccf6

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 345642b76b3a499884c227983fb3a9f9c9ea9078b34cd577ee674d260aa1ccf6

(this sample)

  
Dropped by
xloader
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/269908/

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