MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a997b6a541b763d9a2efe9e00e5d06facbe23471bbca2b19f30c8126c93bc101. 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 3 File information Comments
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SHA256 hash: a997b6a541b763d9a2efe9e00e5d06facbe23471bbca2b19f30c8126c93bc101
SHA3-384 hash: 8b18f1e9bc60147cce378af45bb416a9565edbb5ad2d201edb7e3f4b11dc65651b4324f10c0cd88beb60dfe6f57b4c5c
SHA1 hash: abbb3f7d48d3d044657e7ab922da164e1867a163
MD5 hash: fe5f5a161a94870e8274612885c74843
humanhash: idaho-venus-dakota-jig
File name:Invoice.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:780'288 bytes
First seen:2022-04-25 12:53:12 UTC
Last seen:2022-04-25 13:43:07 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'606 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:2/hgQny5HesEI8rDpV/QaWtDSdc++TBJzRNxCzd8hHDmBnVJ3K5M:2IHeDr6SdAxCShHOnV5K
Threatray 16'091 similar samples on MalwareBazaar
TLSH T145F4DF43B105EA8DC875F9F242105E9050A5AEDE81B552F26862377969FE2C3FF103EE
TrID 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13)
15.9% (.EXE) Win64 Executable (generic) (10523/12/4)
9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
7.6% (.EXE) Win16 NE executable (generic) (5038/12/1)
6.8% (.EXE) Win32 Executable (generic) (4505/5/1)
File icon (PE):PE icon
dhash icon c4bada9ae8cca4c8 (13 x Formbook, 6 x AgentTesla, 5 x AveMariaRAT)
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
240
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/266349/
Detection(s):
SecuriteInfo.com.W32.AIDetectNet.01.13859.11083.UNOFFICIAL
Create hunting rule

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:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
control.exe obfuscated packed replace.exe update.exe
Link:
https://www.filescan.io/uploads/626699fd73707978a8469c21/reports/cd88ecb3-0a33-4c40-bd6b-b259c85b594d/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/b70a5fdf-98b9-4f85-8234-809fcc8544c6
Result
Threat name:
FormBook
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Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/982405
Signature
C2 URLs / IPs found in malware configuration
Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent)
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
PE file contains section with special chars
PE file has nameless sections
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
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 signatures2 2 Behavior Graph ID: 614893 Sample: Invoice.exe Startdate: 25/04/2022 Architecture: WINDOWS Score: 100 30 Found malware configuration 2->30 32 Malicious sample detected (through community Yara rule) 2->32 34 Multi AV Scanner detection for submitted file 2->34 36 8 other signatures 2->36 10 Invoice.exe 3 2->10         started        process3 file4 28 C:\Users\user\AppData\...\Invoice.exe.log, ASCII 10->28 dropped 46 Tries to detect virtualization through RDTSC time measurements 10->46 48 Injects a PE file into a foreign processes 10->48 50 Contains functionality to check if a debugger is running (CheckRemoteDebuggerPresent) 10->50 14 Invoice.exe 10->14         started        signatures5 process6 signatures7 52 Modifies the context of a thread in another process (thread injection) 14->52 54 Maps a DLL or memory area into another process 14->54 56 Sample uses process hollowing technique 14->56 58 Queues an APC in another process (thread injection) 14->58 17 explorer.exe 14->17 injected process8 process9 19 help.exe 17->19         started        signatures10 38 Self deletion via cmd delete 19->38 40 Modifies the context of a thread in another process (thread injection) 19->40 42 Maps a DLL or memory area into another process 19->42 44 Tries to detect virtualization through RDTSC time measurements 19->44 22 cmd.exe 1 19->22         started        24 explorer.exe 86 19->24         started        process11 process12 26 conhost.exe 22->26         started       
Detection:
formbook
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Link:
https://mwdb.cert.pl/sample/a997b6a541b763d9a2efe9e00e5d06facbe23471bbca2b19f30c8126c93bc101/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
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Status:
Malicious
First seen:
2022-04-25 12:54:07 UTC
File Type:
PE (.Net Exe)
Extracted files:
17
AV detection:
15 of 25 (60.00%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=vgl3njkbw5r5tixp5hqa4xig7lf6endrxpfcwgptbsasnsj3yeaq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
06440b7c6c51686469c0acaf74959c82d045c48daa6c2ef369404e56f41d3c96
Formbook
0b547b6fbd2328c64aab9806e3617ec953098db3af45a2546697d9ca7ee838c9
Formbook
4798c1efb308026834b2325d0ce09334304208a0659cecdbbf5b023bf704f0e4
Formbook
49a53fb698c6608f315ec4176b93a2334e99cbcc3bb37fab5d3062bc390961f4
Formbook
4cfa2754f65c5621cec77a0804c28092191f5d2993a49c40312c940fe2ef08c3
Formbook
62b2c989ddd3f2e81d616fc0e26e0fd1791ab938cdf34e73ba285f4cfc4cac7b
Formbook
a6b250ec9613b293e9333e2410623c19e3e3544df34525a607dd0ecd36f138f6
Formbook
ab16df3a8883b6049c041dfb010de4ca1ff8ef1ff598c46b9395833b52f78f83
Formbook
aec74de68b784abd0b40a123a06480e09c3f00cceb88245e766606ea8650eb4a
Formbook
+ 16'081 additional samples on MalwareBazaar
Result
Malware family:
xloader
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Score:
  10/10
Tags:
family:xloader campaign:gfge loader rat
Link:
https://tria.ge/reports/220425-p47vzacac9/
Behaviour
Modifies registry class
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
Xloader Payload
Xloader
Unpacked files
SH256 hash:
b7f01ac14350b7644caff31902dd801757ec7c468dadb86f0283329635140064
MD5 hash:
c35e0f7b3802d97501727c57d9054d9c
SHA1 hash:
72809a3885a155339ac93cf750ac05d367d89c5c
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/db7c66fe-85c7-4c46-a4fb-34bd250dc949/
Parent samples :
a997b6a541b763d9a2efe9e00e5d06facbe23471bbca2b19f30c8126c93bc101
c0e6b0b4e80d36f0872fe01ed20cc5a6d17083f6d11ff93cc5ccc841dd43aa33
abb7b79496780a03680d3406348b02a7418a75260a97ad3a63a9c0d11d030488
c9ce6cdd55466893068a0f0b4f6b0ea2e96ca3f7d55f818bda2205985037ac0a
ced900f9ec05901373c3ae09a06b3ef5ef958764f1fc551590b5f2a820f115a1
3946f3036e103af4caf04607d09ead4968fc0240881596f5e95db307f260d898
SH256 hash:
06a8e794fc0fb2d9136dfe7203fabdae7df6ca065dc55af29166d3ae876b86a3
MD5 hash:
370aecfafa031d7a3e9edf68f9fcbc43
SHA1 hash:
6b487ca76c7882febeca66eae1c08a17e8d564e9
Link:
https://www.unpac.me/results/db7c66fe-85c7-4c46-a4fb-34bd250dc949/
SH256 hash:
9e3d7934cc996e015ac87d0249d08d4efdd0d74b53b54a30ef780b8a6ebe516f
MD5 hash:
160173803cc2e372fb4dba0ff39e0c5b
SHA1 hash:
f8e137995cc5a57e9145d693dc5f7f77a74246a8
Link:
https://www.unpac.me/results/db7c66fe-85c7-4c46-a4fb-34bd250dc949/
SH256 hash:
09cd3bc420c8982190990a9673b58c3ab01e933dff0881f1e521d3316f1b9a6b
MD5 hash:
6933707e111286a128ad0f7fa298153f
SHA1 hash:
d1121c8bed634e9684727e8c0aad3f597b0749ad
Link:
https://www.unpac.me/results/db7c66fe-85c7-4c46-a4fb-34bd250dc949/
SH256 hash:
a997b6a541b763d9a2efe9e00e5d06facbe23471bbca2b19f30c8126c93bc101
MD5 hash:
fe5f5a161a94870e8274612885c74843
SHA1 hash:
abbb3f7d48d3d044657e7ab922da164e1867a163
Link:
https://www.unpac.me/results/db7c66fe-85c7-4c46-a4fb-34bd250dc949/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.35
Link:
https://yomi.yoroi.company/submissions/a997b6a541b763d9a2efe9e00e5d06facbe23471bbca2b19f30c8126c93bc101

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:pdb2
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Rule name:pe_imphash
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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 a997b6a541b763d9a2efe9e00e5d06facbe23471bbca2b19f30c8126c93bc101

(this sample)

  
Dropped by
Formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/266349/

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