MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 ec27e95180289cd7ca8ebfafc4a1ec973448dcda09892716324966ac95ce4a87. 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 1 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: ec27e95180289cd7ca8ebfafc4a1ec973448dcda09892716324966ac95ce4a87
SHA3-384 hash: e79e45238c94dcb6e9deebbd18e06e3d4217ed634cf31ef197fe53f13adb69f172346916075b89828f07b7fd4d324cba
SHA1 hash: c3640cd3d0d9b4b2f92362b62ebffe2ae72b56f3
MD5 hash: 12af31fb6eefe930c36cff0c61b43b13
humanhash: mockingbird-florida-snake-coffee
File name:Kontorister.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:288'264 bytes
First seen:2023-04-12 13:45:34 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash e221f4f7d36469d53810a4b5f9fc8966 (118 x GuLoader, 28 x RemcosRAT, 21 x Formbook)
ssdeep 6144:rlJZfrvN/hWnmco9ETBWXH7Jf3vTkMDcahRpro7TdPKtozQf:rljrsNCXVf/pDRhrASozs
Threatray 624 similar samples on MalwareBazaar
TLSH T1B0541214BBE0C5E3C2A34731CF73C7EDE638B1906461636B57086A927A3B796D30D25A
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 b2a89c96a2cada72 (2'283 x Formbook, 981 x Loki, 803 x AgentTesla)
Reporter malwarelabnet
Tags:exe FormBook GuLoader signed

Code Signing Certificate

Organisation:
Issuer:
Algorithm:sha256WithRSAEncryption
Valid from:2022-05-28T23:01:15Z
Valid to:2025-05-27T23:01:15Z
Serial number: 2084db28bada759fe69b48b79b3990e57aa11ea3
Thumbprint Algorithm:SHA256
Thumbprint: 4c5e7dd064b3d3be4b4c58fb975f890884d08149adf6cf15a073b7b76653762c
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
304
Origin country :
CA CA
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
Kontorister.exe
Verdict:
Malicious activity
Analysis date:
2023-04-12 13:46:15 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/8f18f41a-119d-4342-b1ef-660fc351c165

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/381842/
Detection(s):
SecuriteInfo.com.W32.Injector.ICTM-3491.15447.20281.UNOFFICIAL
Create hunting rule

Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a file
Delayed reading of the file
Creating a file in the Windows subdirectories
Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
guloader overlay packed shell32.dll
Link:
https://www.filescan.io/uploads/6436b61ce90389fc714b40d7/reports/bc7654c2-cf79-461d-82ce-a5f5cf569b91/overview
Verdict:
Malicious
Labled as:
Win/grayware_confidence_60%
Link:
https://www.hybrid-analysis.com/sample/ec27e95180289cd7ca8ebfafc4a1ec973448dcda09892716324966ac95ce4a87
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.
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/287f4a96-a4be-4fe4-b457-5bf6bcc5a1d2
Result
Threat name:
FormBook, GuLoader
Create hunting rule
Detection:
malicious
Classification:
rans.troj.evad.spyw
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/1212603
Signature
Antivirus detection for URL or domain
Found potential ransomware demand text
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 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 Any.run
Tries to harvest and steal browser information (history, passwords, etc)
Tries to steal Mail credentials (via file / registry access)
Writes to foreign memory regions
Yara detected FormBook
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 845540 Sample: Kontorister.exe Startdate: 12/04/2023 Architecture: WINDOWS Score: 100 38 www.yd352.com 2->38 40 www.traumlichtfotografie.com 2->40 42 23 other IPs or domains 2->42 62 Snort IDS alert for network traffic 2->62 64 Multi AV Scanner detection for domain / URL 2->64 66 Malicious sample detected (through community Yara rule) 2->66 68 7 other signatures 2->68 11 Kontorister.exe 41 2->11         started        signatures3 process4 file5 30 C:\Users\user\AppData\Local\...\lang-1081.dll, PE32 11->30 dropped 32 C:\Users\user\AppData\Local\...behaviorgraphracenote.dll, PE32 11->32 dropped 34 C:\Users\user\AppData\...\gnsdk_link.dll, PE32 11->34 dropped 36 C:\Users\user\AppData\Local\...\System.dll, PE32 11->36 dropped 80 Tries to detect Any.run 11->80 15 Kontorister.exe 6 11->15         started        signatures6 process7 dnsIp8 50 googlehosted.l.googleusercontent.com 142.250.185.129, 443, 49798 GOOGLEUS United States 15->50 52 drive.google.com 142.250.74.206, 443, 49797 GOOGLEUS United States 15->52 54 Modifies the context of a thread in another process (thread injection) 15->54 56 Tries to detect Any.run 15->56 58 Maps a DLL or memory area into another process 15->58 60 2 other signatures 15->60 19 explorer.exe 3 1 15->19 injected signatures9 process10 dnsIp11 44 www.elladeehiggins.com 216.40.34.41, 49839, 49840, 49842 TUCOWSCA Canada 19->44 46 traumlichtfotografie.com 81.169.145.159, 49817, 49818, 49819 STRATOSTRATOAGDE Germany 19->46 48 13 other IPs or domains 19->48 70 System process connects to network (likely due to code injection or exploit) 19->70 23 colorcpl.exe 13 19->23         started        signatures12 process13 signatures14 72 Tries to steal Mail credentials (via file / registry access) 23->72 74 Tries to harvest and steal browser information (history, passwords, etc) 23->74 76 Writes to foreign memory regions 23->76 78 3 other signatures 23->78 26 firefox.exe 23->26         started        process15 process16 28 WerFault.exe 4 26->28         started       
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/ec27e95180289cd7ca8ebfafc4a1ec973448dcda09892716324966ac95ce4a87/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2023-04-12 11:26:31 UTC
File Type:
PE (Exe)
Extracted files:
19
AV detection:
15 of 24 (62.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=5qt6sumafconpsuox6x4jipms42erxg2bgesofrsjftkzfoojkdq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
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0ead3606ff3625f1daa4c3e9a592f18f0f136d0373be4db5f1500c861cc791df
Formbook
31d9c25d965fa6de72c0c376159c19da21bc5dcd579bc038b2134d19b1ca9ab2
Formbook
3fe3d1dde71fcd12d4f23149c19255df9571bf3b5db5e221d9be7e8657e1aa35
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49fe1618c14d32183b774338d27a474d16e05519bb3967940fb33e6af06170f0
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576e3168405699f48e603e3d52162c5b63e1a881c27ac2f8436d3c5a9639df6c
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a7cddad106ee53356655fadfaeaf3b2845aa20de20fbc772cc81866d19993d3d
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db423f90dcdd288aaf1fb8bc898dab496765d8b56abe145b9bbeff9e26a4e695
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e19450065019d83966ee6106ff75a1fc710392179cb11426fd1011301ce1c06c
Formbook
e4e2091a348b6f883c60951545d1318dae365658c50f7a5d342144f42aa224d6
Formbook
fe8dfa5a692cbfdcc238b360d8e7e2f07b673d7d7645d9d2a2eabd245213457c
Formbook
+ 614 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader downloader spyware stealer
Link:
https://tria.ge/reports/230412-q2ypyseb3y/
Behaviour
Modifies Internet Explorer settings
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Suspicious use of SetThreadContext
Legitimate hosting services abused for malware hosting/C2
Checks QEMU agent file
Checks computer location settings
Loads dropped DLL
Reads user/profile data of web browsers
Blocklisted process makes network request
Guloader,Cloudeye
Unpacked files
SH256 hash:
2033e771aceb139415b6c378f21ab7ef8c2d7fa44b881085b4c01fcdbd87d83a
MD5 hash:
f049e2caaa077327bb3de9e56da43071
SHA1 hash:
cf17fd5e336e4af212725e22e20aa5842f4f3baa
Link:
https://www.unpac.me/results/17421002-ea41-4136-836d-425cb08b88e7/
SH256 hash:
7fe77ca13121a113c59630a3dba0c8aaa6372e8082393274da8f8608c4ce4528
MD5 hash:
fc90dfb694d0e17b013d6f818bce41b0
SHA1 hash:
3243969886d640af3bfa442728b9f0dff9d5f5b0
Link:
https://www.unpac.me/results/17421002-ea41-4136-836d-425cb08b88e7/
SH256 hash:
08929e352de8799a2036c6fc7d2a05d6ec437da8be6be5b05171fed5e786ca6e
MD5 hash:
927d128df6b67fc942b8f8e411bfb19b
SHA1 hash:
2fff7d2b9d0c2040ee2ed2fad92ef6216ddb4084
Link:
https://www.unpac.me/results/17421002-ea41-4136-836d-425cb08b88e7/
SH256 hash:
ec27e95180289cd7ca8ebfafc4a1ec973448dcda09892716324966ac95ce4a87
MD5 hash:
12af31fb6eefe930c36cff0c61b43b13
SHA1 hash:
c3640cd3d0d9b4b2f92362b62ebffe2ae72b56f3
Link:
https://www.unpac.me/results/17421002-ea41-4136-836d-425cb08b88e7/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/ec27e9518028/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
GuLoader
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/ec27e95180289cd7ca8ebfafc4a1ec973448dcda09892716324966ac95ce4a87

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_Digital_Certificate
Create hunting rule
Author:albertzsigovits

File information

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

Cape
Cape
https://www.capesandbox.com/analysis/381842/

Comments