MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b8620affccaa451b93959f0a3e853a960ede3740148c7da1c52372938fcbdcb7. 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 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b8620affccaa451b93959f0a3e853a960ede3740148c7da1c52372938fcbdcb7
SHA3-384 hash: e7037bf1b639bae7116f6b761ebc61c88c9da341f7831799176ca4d80ebcb2afcab718adb829866423edeebcb4ad8619
SHA1 hash: 85a64c0b9b780fd77258f009fde433ecba630617
MD5 hash: 8be0a414b8c2877b19284d66c31c7b1d
humanhash: blossom-mars-twenty-cola
File name:Confirmation of account balance.pdf.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:762'368 bytes
First seen:2022-03-21 09:48:30 UTC
Last seen:2022-03-21 13:54:53 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'742 x AgentTesla, 19'607 x Formbook, 12'242 x SnakeKeylogger)
ssdeep 12288:Sz65BJMHRmnoxqUadbPOJQ/U5fpw/0ZUtZzEReQG6z00D3M2hat3L0aNBmRiXlZ1:SCMRXz00D33oFL0cBQkzIgQ0
Threatray 14'545 similar samples on MalwareBazaar
TLSH T10BF409BD715472AFC877C1328A985C64F650A4FB630B4917E4931B9A9D0F8C7EF840BA
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
223
Origin country :
n/a
Vendor Threat Intelligence
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/253486/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a custom TCP request
Сreating synchronization primitives
Unauthorized injection to a recently created process
Creating a file
Searching for synchronization primitives
Launching a process
Launching cmd.exe command interpreter
Unauthorized injection to a system process
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
control.exe obfuscated packed replace.exe update.exe
Link:
https://www.filescan.io/uploads/62384a190cd58dbd92cd9d25/reports/225c88d8-c18a-4967-880e-abbeaccacfb6/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:
Generic Malware
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/061618b3-b2b1-4592-8265-a481c7689724
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.adwa.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/960585
Signature
.NET source code contains very large strings
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
Sigma detected: Suspect Svchost Activity
Sigma detected: Suspicious Double Extension
Sigma detected: Suspicious Svchost Process
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses an obfuscated file name to hide its real file extension (double extension)
Yara detected AntiVM3
Yara detected FormBook
Yara detected Shellcode strings
Behaviour
Behavior Graph:
Download SVG
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b8620affccaa451b93959f0a3e853a960ede3740148c7da1c52372938fcbdcb7/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-03-21 01:55:36 UTC
File Type:
PE (.Net Exe)
Extracted files:
21
AV detection:
30 of 42 (71.43%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=xbrav76mvjcrxe4vt4fd5bj2syhn4n2acsgh3iofenzjhd6l3s3q._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
03231087b8d197ac9adff7250c8ceb9c1e6d604c008e5622de78d7e1fcc78c1c
Formbook
1aa89074af39244a69ae04905a4f959cb59d567abbbb7ab76407c2fa34a8f59b
Formbook
516601b7a328bcee918e8c52e46f71b39437045489bdaaf90136c9f899197bc8
Formbook
52b3b8d10c143dd7b6dfc186bf1e1e0e3c47c3f995dec4e1e4f5f569075d9a38
Formbook
59ea7066c5ea6dc18d7139bb8773375246fdaa93001567a4cf3abf356e9d7b34
Formbook
67435ee3c6fd3d272c004256f34020df37fb93fd33c18720053b9d2c1bb19b67
Formbook
6b765d70d97e0b3d8da0d871555d9d284bd08e85034ad45447bde1aadd2b2878
Formbook
e3004a946bcf2e7b396a75d00db10dee9dcd0881cc197d9294a171ad3d882349
Formbook
+ 14'535 additional samples on MalwareBazaar
Result
Malware family:
xloader
Create hunting rule
Score:
  10/10
Tags:
family:xloader campaign:nig8 loader rat
Link:
https://tria.ge/reports/220321-ltcejabaf5/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Program crash
Suspicious use of SetThreadContext
Xloader Payload
Xloader
Unpacked files
SH256 hash:
2da41f4fc1cd5fc3a03337115dbabafd5fad7cf6594118131ce8e17a9de53ed4
MD5 hash:
d21d65e25edcbc47b3e7bdae5269d7f7
SHA1 hash:
7da7c85b47cece322eec9a65e3fa9ac2eef354fe
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/47695493-2279-44d3-9d0d-ccc1db31c39b/
Parent samples :
b8620affccaa451b93959f0a3e853a960ede3740148c7da1c52372938fcbdcb7
c9696f9d9f78c732a50860f2b9837d6527ad0f74dbd5bc44bc6446d3c51d7954
745df99008d9984e2af33ab01ee5a986a053996465d2c127ecc683e51ef0e3e6
1378ae8590449eb1d4300a28ca1119097f5954ac6c54f99dc0d83d75d932da28
f56e78fdd05ad22063c5d64f7852017ad8b8859015d420473917197dd7565403
SH256 hash:
79823e47436e129def4fba8ee225347a05b7bb27477fb1cc8be6dc9e9ce75696
MD5 hash:
39f524c1ab0eb76dfd79b2852e5e8c39
SHA1 hash:
428018e1701006744e34480b0029982a76d8a57d
Link:
https://www.unpac.me/results/47695493-2279-44d3-9d0d-ccc1db31c39b/
SH256 hash:
b488ea72e3fc27f31d019f662add67c908c3c73e537f642ce6490d7e7d8ae3c2
MD5 hash:
659cb102d9d4045f43c6cde156c958cd
SHA1 hash:
08c20ac89701361ddd2a79cddc91d43627d4dd43
Link:
https://www.unpac.me/results/47695493-2279-44d3-9d0d-ccc1db31c39b/
SH256 hash:
b8620affccaa451b93959f0a3e853a960ede3740148c7da1c52372938fcbdcb7
MD5 hash:
8be0a414b8c2877b19284d66c31c7b1d
SHA1 hash:
85a64c0b9b780fd77258f009fde433ecba630617
Link:
https://www.unpac.me/results/47695493-2279-44d3-9d0d-ccc1db31c39b/
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/b8620affccaa451b93959f0a3e853a960ede3740148c7da1c52372938fcbdcb7

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 b8620affccaa451b93959f0a3e853a960ede3740148c7da1c52372938fcbdcb7

(this sample)

  
Dropped by
Formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/253486/

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