MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 c0f5e01dded221a720c2173447e936c1e1148928016187fa4e8ac8e3a087b4ee. 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: c0f5e01dded221a720c2173447e936c1e1148928016187fa4e8ac8e3a087b4ee
SHA3-384 hash: b435036eebc064a72f877eda0bcab83c59ce9b85ec08cbcdc34012e1f85e5222141aae8b3563398e365f41975c709abb
SHA1 hash: 82a9a351185b4c6e16886099391f2fd95ad76bee
MD5 hash: ec7499d16283df35c151934692cf0719
humanhash: fanta-neptune-floor-montana
File name:Re.offer.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:978'432 bytes
First seen:2022-10-25 06:06:30 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'658 x AgentTesla, 19'469 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:TX2iNahLuyAHmKMvYAssnMmTDCS9Mc0phHZ+5nFYRgW7sZ8zk1tKNds/:TX1MhLuyybMvYA/n7CSg5+4R7Dzkv
TLSH T136256A7A22D24617E4253271C493D2F32AFB5D607061D1CBAAD73F6FBC611BB9212386
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

Intelligence

File Origin
# of uploads :
1
# of downloads :
217
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
Re.offer.exe
Verdict:
Malicious activity
Analysis date:
2022-10-25 06:08:04 UTC
Tags:
formbook trojan stealer
Link:
https://app.any.run/tasks/a51ffd49-44ce-4aa8-812e-08120635b34e

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/323795/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.WZA.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Win32.PWSX-gen.11560.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Unauthorized injection to a recently created process
Creating a file
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a system process
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/351a0196-bf7e-4144-965f-6290de049a64
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1097258
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
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 domain / URL
Multi AV Scanner detection for submitted file
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 sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses ipconfig to lookup or modify the Windows network settings
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 729899 Sample: Re.offer.exe Startdate: 25/10/2022 Architecture: WINDOWS Score: 100 34 Snort IDS alert for network traffic 2->34 36 Multi AV Scanner detection for domain / URL 2->36 38 Malicious sample detected (through community Yara rule) 2->38 40 8 other signatures 2->40 10 Re.offer.exe 3 2->10         started        process3 file4 30 C:\Users\user\AppData\...\Re.offer.exe.log, ASCII 10->30 dropped 52 Tries to detect virtualization through RDTSC time measurements 10->52 14 Re.offer.exe 10->14         started        17 Re.offer.exe 10->17         started        signatures5 process6 signatures7 54 Modifies the context of a thread in another process (thread injection) 14->54 56 Maps a DLL or memory area into another process 14->56 58 Sample uses process hollowing technique 14->58 60 Queues an APC in another process (thread injection) 14->60 19 explorer.exe 14->19 injected process8 dnsIp9 32 www.jeuxjetx.fr 188.114.96.3, 49696, 80 CLOUDFLARENETUS European Union 19->32 42 System process connects to network (likely due to code injection or exploit) 19->42 44 Uses ipconfig to lookup or modify the Windows network settings 19->44 23 ipconfig.exe 19->23         started        signatures10 process11 signatures12 46 Modifies the context of a thread in another process (thread injection) 23->46 48 Maps a DLL or memory area into another process 23->48 50 Tries to detect virtualization through RDTSC time measurements 23->50 26 cmd.exe 1 23->26         started        process13 process14 28 conhost.exe 26->28         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/c0f5e01dded221a720c2173447e936c1e1148928016187fa4e8ac8e3a087b4ee/
Threat name:
ByteCode-MSIL.Trojan.FormBook
Create hunting rule
Status:
Malicious
First seen:
2022-10-17 01:14:42 UTC
File Type:
PE (.Net Exe)
Extracted files:
33
AV detection:
21 of 26 (80.77%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=yd26aho62iq2oigcc42ep2jwyhqrjcjiafqyp6sorleohiehwtxa._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:ng04 rat spyware stealer trojan
Link:
https://tria.ge/reports/221025-gva6msbfh7/
Behaviour
Checks processor information in registry
Enumerates system info in registry
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Drops file in System32 directory
Suspicious use of SetThreadContext
Deletes itself
Formbook payload
Formbook
Unpacked files
SH256 hash:
8c70809310f41a91ff32acc19f100291f1f891b50f755f7aaf3cfaa9b3605081
MD5 hash:
c31e5d9ba7aec5414d391e20a40e396f
SHA1 hash:
7c6fadf94aa41dbbc6c36ff1ae283d054e659843
Detections:
FormBook
Create hunting rule
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/84cb7e3c-3055-4779-a6b0-fee58782391a/
Parent samples :
bd29947fc88d96b3f5b2982d67f1d5df99aad570ce86b87ed91103b8f43c3b8f
37e6fcc2791cdc7fa2f5a433d7b13d0d57857cde8ab4aec7e5da2879eee8bb59
3267b1eb2ba481661c36673fd9ece9d49a3e6ebe215ec02210fac50673cad1be
4555bb45a8a8d87ec2a075e1715934c8c43b4f260ad7d175668d4926cb4a664e
6670643884f45c79ebf03330570074899755e1f3902d7c08316ecbde4f57efa4
886f9ff18b92cf41d4c0a56e6720304130b15a1656bdc235bd4bf190ef8fd26c
7bfd0cbe00b3e14080e2001ec896a53d2f205caa56480a0d760f8460980da76b
062e12bd387057d358d7f0ba9a20f0fd62e3f589e2660bf63e2c85eb5ea827bd
0c7b5e8115ca42bf2a539dc86e042acdd873463d4724fbb61c923a6d0aa0e869
a5b3f39420dfafa9d157f75e980c1fd8742ab42ec71d4170a8e1752589c5c83d
af4e4f24d35ee2d2d5efdfcaff5d9b5c0b6173165d66e5e22ff44c53e8a316f4
7f8b18cb89b63284a7d5fed4c53f861f8ce52a6c7c776e8d7c4b1b223202c6f8
7b7a2b8c271be1e85158974a71fc1403a4ef4d617905f019d47206084e49eb52
c0f5e01dded221a720c2173447e936c1e1148928016187fa4e8ac8e3a087b4ee
8131924855c3926690be5745c37966c5bef10c9c851054fab7729fc7fb02ba13
09cda694bcb240c7b0742de73888b7ab55db4f29ee1c6c471f4b8982dc150f5d
3d0400fb45ebf52e42f40e3c6c3c246a6c1e1550f8b974b848f57a4294084162
dae07c0c93ddde9c93128b15ba4fd8ec83a07538d3b03eda7374cfcb5441c84f
dd7311a0428c78cec1db4fbca409094ab6694db68c03aa878f9f1872ecc6e1db
e8ed49650b42ebb3a251a7353809309e94f885316bf1b0153def1c180628cee4
2cb3478355fda005cf47b9c74d29944815892efe821a57b0974969939c106d09
dd7c962afea2752944885fdd3551a0a50fc3a58f676c1466f5fb71eda72d5a24
2de425eff8193440b8b171e724acec8404b9d81ec48600847946b2b828b494f0
SH256 hash:
59529818cf2998c6e4931609843f2e53165f4555d3a41c002d747f5c2747dff0
MD5 hash:
3c734b226579b0705124b86c13fb9693
SHA1 hash:
ebac0bdcbb6578014f1422efec887e56ec250092
Link:
https://www.unpac.me/results/84cb7e3c-3055-4779-a6b0-fee58782391a/
SH256 hash:
c8442a49031f51f7a3120bd5581e359ef1827adde30ac365328ba09fb2544a18
MD5 hash:
f073efa90f23aedb647f50ae5e47afa6
SHA1 hash:
6402add6db6ea01ebeec1f3945455dafb38868c6
Link:
https://www.unpac.me/results/84cb7e3c-3055-4779-a6b0-fee58782391a/
SH256 hash:
1648044e6192c31898a2528230b54169af7ca51e390483e9361b22d248a3bcb1
MD5 hash:
782f5271b8840ad1d77cda9dec661568
SHA1 hash:
14b05975e326f98d6b05ea11055a3f1113798a06
Link:
https://www.unpac.me/results/84cb7e3c-3055-4779-a6b0-fee58782391a/
SH256 hash:
e20ec8f3c957bcb6a194ef688bae8af2015cfffb20e7baf8b2114d7b70ade4ee
MD5 hash:
35cb29046968faca7f3f3b4463449b6c
SHA1 hash:
088c8c30ec1bece0a4b5bbfe3982b073f8b95598
Link:
https://www.unpac.me/results/84cb7e3c-3055-4779-a6b0-fee58782391a/
SH256 hash:
c0f5e01dded221a720c2173447e936c1e1148928016187fa4e8ac8e3a087b4ee
MD5 hash:
ec7499d16283df35c151934692cf0719
SHA1 hash:
82a9a351185b4c6e16886099391f2fd95ad76bee
Link:
https://www.unpac.me/results/84cb7e3c-3055-4779-a6b0-fee58782391a/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.81
Link:
https://yomi.yoroi.company/submissions/c0f5e01dded221a720c2173447e936c1e1148928016187fa4e8ac8e3a087b4ee

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 c0f5e01dded221a720c2173447e936c1e1148928016187fa4e8ac8e3a087b4ee

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/323795/

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