MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 577b86660674d1a71218a077a47bffeec8c618153b66ca4205fcfcaf2cf020c9. 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 6 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 577b86660674d1a71218a077a47bffeec8c618153b66ca4205fcfcaf2cf020c9
SHA3-384 hash: 78f0fb89d241fd36dd14b470ee4cf8010c816a3be02d9602f3bc8b49b97b24e0f2acf9f58f2c6819176726452e8564d6
SHA1 hash: c472b86929c088d9435c32227dd9810ee5967d1f
MD5 hash: 3ed5e49064f3724e6f01a34de64a51b5
humanhash: six-beer-summer-november
File name:2lPUbYNk2ocYeAO.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:1'147'392 bytes
First seen:2022-09-08 06:04:01 UTC
Last seen:2022-09-09 10:00:43 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'657 x AgentTesla, 19'468 x Formbook, 12'206 x SnakeKeylogger)
ssdeep 24576:pkxmGFV85B9ooQSecaqigeBM/zieiWfEZauD:pkxNF25wdScM/mZNND
TLSH T1D735190721940AA5D07693FC20CCC1728BB99E45E53FD945BFC99CEFF592F2846D22A2
TrID 64.2% (.EXE) Generic CIL Executable (.NET, Mono, etc.) (73123/4/13)
11.5% (.SCR) Windows screen saver (13101/52/3)
9.2% (.EXE) Win64 Executable (generic) (10523/12/4)
5.7% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2)
3.9% (.EXE) Win32 Executable (generic) (4505/5/1)
Reporter lowmal3
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
2
# of downloads :
310
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
formbook
Create hunting rule
ID:
1
File name:
2lPUbYNk2ocYeAO.exe
Verdict:
Malicious activity
Analysis date:
2022-09-08 06:04:51 UTC
Tags:
formbook
Link:
https://app.any.run/tasks/7cd443c2-ab5e-4f7d-8171-5a601487b842

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/308647/
Detection(s):
SecuriteInfo.com.MSIL.Kryptik.AGIJ.tr.27355.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Searching for the window
Creating a window
Launching a process
Unauthorized injection to a system process
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Tags:
packed
Link:
https://www.filescan.io/uploads/63198650d94ccae41084957e/reports/4dddc1b8-340e-425a-b9a9-16110a05c1c2/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
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/fd1157bb-a75a-427a-8561-ffe3beb08efd
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1066901
Signature
.NET source code contains potential unpacker
Antivirus detection for URL or domain
C2 URLs / IPs found in malware configuration
Deletes itself after installation
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 domain / URL
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
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)
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 699433 Sample: 2lPUbYNk2ocYeAO.exe Startdate: 08/09/2022 Architecture: WINDOWS Score: 100 26 www.healthseg.com 2->26 28 healthseg.com 2->28 44 Snort IDS alert for network traffic 2->44 46 Multi AV Scanner detection for domain / URL 2->46 48 Malicious sample detected (through community Yara rule) 2->48 50 7 other signatures 2->50 8 2lPUbYNk2ocYeAO.exe 3 2->8         started        signatures3 process4 file5 24 C:\Users\user\...\2lPUbYNk2ocYeAO.exe.log, ASCII 8->24 dropped 11 2lPUbYNk2ocYeAO.exe 8->11         started        14 2lPUbYNk2ocYeAO.exe 8->14         started        16 2lPUbYNk2ocYeAO.exe 8->16         started        process6 signatures7 52 Modifies the context of a thread in another process (thread injection) 11->52 54 Maps a DLL or memory area into another process 11->54 56 Sample uses process hollowing technique 11->56 58 Queues an APC in another process (thread injection) 11->58 18 svchost.exe 11->18         started        21 explorer.exe 11->21 injected process8 dnsIp9 34 Deletes itself after installation 18->34 36 Modifies the context of a thread in another process (thread injection) 18->36 38 Maps a DLL or memory area into another process 18->38 30 azino777club4.xyz 81.91.178.41, 49758, 80 ON-LINE-DATAServerlocation-NetherlandsDrontenNL Russian Federation 21->30 32 www.azino777club4.xyz 21->32 40 System process connects to network (likely due to code injection or exploit) 21->40 42 Performs DNS queries to domains with low reputation 21->42 signatures10
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/577b86660674d1a71218a077a47bffeec8c618153b66ca4205fcfcaf2cf020c9/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2022-09-08 01:53:33 UTC
File Type:
PE (.Net Exe)
Extracted files:
32
AV detection:
18 of 39 (46.15%)
Threat level:
  5/5
Detection(s):
Malicious file
Link:
https://check.spamhaus.org/check/?searchterm=k55ymzqgoti2oeqyub32i67753emmgavhntmuqqf7t6k6lhqedeq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Result
Malware family:
n/a
Score:
  7/10
Tags:
n/a
Link:
https://tria.ge/reports/220908-gsljladgh2/
Behaviour
Enumerates system info in registry
Modifies Internet Explorer settings
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
Checks computer location settings
Unpacked files
SH256 hash:
1c3ffaf4b6734721aae6b22dff96d14dc816b46d06b85634ae45b18f52714c42
MD5 hash:
937f6b41ee7dfb9931339154d30656f6
SHA1 hash:
2e5663c0a468fa38dbacce27566f796ea8c9c99c
Detections:
win_formbook_auto
Create hunting rule
win_formbook_g0
Create hunting rule
Link:
https://www.unpac.me/results/7daee425-78f6-4bfc-a76e-5738593b1dec/
Parent samples :
3dabb00d80f64b27c340d096bf11dfa24d869620b2408c89b59ec704fd180e7c
577b86660674d1a71218a077a47bffeec8c618153b66ca4205fcfcaf2cf020c9
c2cd954483f95e4bddf8dcd519550a9c069139148aed5f1da469213a516495e6
f264dabda94973df23206f0f7340e4986b6aa50601438e277a0a339259933ba6
721eee38b9c975862181aac88a3b7ff58666f4eae5db7b8b3eaf37d13fa4eb16
SH256 hash:
8b533ffaed24e0351e489b14aaac6960b731db189ce7ed0c0c02d4a546af8e63
MD5 hash:
dbc7be56e6e32349315170599c8b333f
SHA1 hash:
d8e5840e3574b87d435e55a65ac648e040871aee
Link:
https://www.unpac.me/results/7daee425-78f6-4bfc-a76e-5738593b1dec/
SH256 hash:
d52d72f015090a4a7b840339410d0f7883d26b3199c13c255b0678c39971c72a
MD5 hash:
deff10ec160babcd6cb92438dcd98dbd
SHA1 hash:
c18dd864088c7b2e6aeaa491863cfcd5bc0fa0ad
Link:
https://www.unpac.me/results/7daee425-78f6-4bfc-a76e-5738593b1dec/
SH256 hash:
f7caacb0aff130d180dbe3397c3d84204181c5928e65fe6dda24a685207112f0
MD5 hash:
fe3e2e472a1bf53b0282286a33f3bfcd
SHA1 hash:
7e08728af388244b734ef45141a6b9b2763a3882
Link:
https://www.unpac.me/results/7daee425-78f6-4bfc-a76e-5738593b1dec/
SH256 hash:
9b4aee132a0228378d66a57fda3a2030952309ef74cf2db724ac916b04d8c034
MD5 hash:
93c6391d23c1aa1ed66fb13f82f2ee31
SHA1 hash:
220098c3047c32b51ae13a5cc1e9beeef3da6e18
Link:
https://www.unpac.me/results/7daee425-78f6-4bfc-a76e-5738593b1dec/
SH256 hash:
577b86660674d1a71218a077a47bffeec8c618153b66ca4205fcfcaf2cf020c9
MD5 hash:
3ed5e49064f3724e6f01a34de64a51b5
SHA1 hash:
c472b86929c088d9435c32227dd9810ee5967d1f
Link:
https://www.unpac.me/results/7daee425-78f6-4bfc-a76e-5738593b1dec/
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/577b86660674/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.65
Link:
https://yomi.yoroi.company/submissions/577b86660674d1a71218a077a47bffeec8c618153b66ca4205fcfcaf2cf020c9

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:malware_Formbook_strings
Create hunting rule
Author:JPCERT/CC Incident Response Group
Description:detect Formbook in memory
Reference:internal research
Rule name:meth_get_eip
Create hunting rule
Author:Willi Ballenthin
Rule name:meth_stackstrings
Create hunting rule
Author:Willi Ballenthin
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash
Rule name:win_formbook_auto
Create hunting rule
Author:Felix Bilstein - yara-signator at cocacoding dot com
Description:Detects win.formbook.

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

Formbook

Executable exe 577b86660674d1a71218a077a47bffeec8c618153b66ca4205fcfcaf2cf020c9

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/308647/

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