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mask-surf-standard-3-es-en-win.exe

Thanksoft

The application mask-surf-standard-3-es-en-win.exe by Thanksoft has been detected as a potentially unwanted program by 1 anti-malware scanner with very strong indications that the file is a potential threat. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. The file has been seen being downloaded from dw.uptodown.com and multiple other hosts.
Publisher:
Thanksoft  (signed and verified)

MD5:
fa5d0ebda2696cc3bf37b6012b8ba2b6

SHA-1:
9f7c8371bdc8816cd46974eaea98ccd4a00a2139

SHA-256:
4d237530cabcd4ac2cf0a164dd3342c837c12bc5307753d698ac3df026906a00

Scanner detections:
1 / 68

Status:
Potentially unwanted

Note:
Our current pool of anti-malware engines have not currently detected this file, however based on our own detection heuristics we feel that this file is unwanted.

Analysis date:
4/26/2024 7:22:40 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Thanksoft.Installer (M)
16.2.16.15

File size:
4.1 MB (4,307,640 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\downloads\mask-surf-standard-3-es-en-win.exe

Digital Signature
Signed by:
Thanksoft

Authority:
VeriSign, Inc.

Valid from:
9/25/2011 3:00:00 AM

Valid to:
11/11/2012 1:59:59 AM

Subject:
CN=Thanksoft, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Thanksoft, L=Dnepropetrovsk, S=n/a, C=UA

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
601A58A2017F0D20AFF0E14B7204977F

File PE Metadata
Compilation timestamp:
7/6/2011 5:31:20 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
9.0

CTPH (ssdeep):
98304:KCwz7ldsTwaLH5Le/lSeZL8vex7FZSuGScAVOiqkZAmL14s9RPa:KCwXutLs/lSeZAAVdT/Ss9xa

Entry address:
0x354B

Entry point:
81, EC, D4, 02, 00, 00, 53, 55, 56, 57, 6A, 20, 33, ED, 5E, 89, 6C, 24, 18, C7, 44, 24, 10, D8, 84, 40, 00, 89, 6C, 24, 14, FF, 15, 30, 80, 40, 00, 68, 01, 80, 00, 00, FF, 15, B8, 80, 40, 00, 55, FF, 15, B0, 82, 40, 00, 6A, 08, A3, 98, 06, 47, 00, E8, 67, 27, 00, 00, 55, 68, B4, 02, 00, 00, A3, B0, 05, 47, 00, 8D, 44, 24, 38, 50, 55, 68, 1C, 86, 40, 00, FF, 15, 80, 81, 40, 00, 68, 04, 86, 40, 00, 68, A0, 85, 46, 00, E8, 35, 26, 00, 00, FF, 15, B4, 80, 40, 00, 50, BF, A0, 10, 4C, 00, 57, E8, 23, 26, 00, 00...
 
[+]

Entropy:
7.9986

Packer / compiler:
Nullsoft install system v2.x

Code size:
25 KB (25,600 bytes)

The file mask-surf-standard-3-es-en-win.exe has been seen being distributed by the following 8 URLs.

https://dw.uptodown.com/dwn/BidWDFMIfenmi0U5qjg16tqe0swcSCUY9iYsGu_D9Y2xH69hkawV1xhZ6YKyrqm4g513AknxzuaNI_CpDH0BK78vc1u9DSvJBDSN7aKpSLcbyHOmk3QuKDtH1Z7he4yi/1whEPsOQQtUKSea1hNHp5vnzb5rkttUmvuJVWTDzrgwsCF1zJWprw6Zt_7og6XQxD_tAlmLxfYGpzfbxBzx1GWvK1NOA-9ZXZLXpwjqQsou45x0Xgd0gYYWm1HjQobJH/BZ4lwC7LA7VuNSGCPu7muLMRFn4yG9ihYAUDuCj_4OBSFjJOjcli0kxpotQAD4vtfysEaGo-dniEglQ-yZ2paEOeqm3X7uZm2xks1QpFVFkpeZkAlVtXEVfcO63xkD1x/.../

https://dw9.uptodown.com/dwn/lV0yFMnMeyKAAXf7t7Ss2ClGXedqvN0CILZye8O33IkOdt1b38RcQO-_ZG6GGG2x1bvkBj6G4KQCzTxOyuMWdi_xKAkUGkOwc3MKppc0r6X9cO8zFctqsOLl8Ms2fsLR/HS7e-hkzFxdSBFsg39mB1dT9ZD_iZTDvATyT2-uc6QmpAREmCit7EP5ANlT4sE64vG7Rfw88U6tpvaUvQEgTTgQh6a-hHbLDnS1ObyX6KoFPhLZ0s_isfUMkeTxXPLNJ/UFciLxv9Aci3E--k4IqKLb4SMD_w-n1uK3ZGnw5b-PxPQrDI1Opq-5tp7T_7F3s065-_mAEb_U2AS6TQZzw8eBBtzeI35EIiEyQpwBqO1U3HKeRiLjEedk1_tApiLcvG/.../mask-surf-standard-3-es-en-win.exe

https://dw.uptodown.com/dwn/togbvoIBHvINHAYOfTARB5ZPsGArxc3u2gQXQ7RI3mXd49o7m6k_1qhWk2qvJaU-AOJlyXSvKOQxIZJh4KFbHr3zimArAxiXKaRX_oXqCsXgDdi9FzVu2Y7BFcMcaUGo/0jrPzm3ctjcgHpB77v7QhmCh0m-Dj-hu6lcvYS9SEYHtgI1ulAS3Uvmh_mjnhlAVBNgI-e3M5676T4EkwbM1VxAS-173_9hc-iRDtOqLM6lkh_2wkrlWfAyJk6hvAI3P/Eisilx6kmm2BeIUrBQL97woYHTDDIxDeaBGoZPSYKwKj6iAGFDz5pSvjwd147eejuD2v3Vy72TD-2sgPHinrY8-420altUpOH579EIqk1_NqAWajOTd22wHrjRU_iyRk/.../

https://dw.uptodown.com/dwn/cmVhu6TPsEdzhG2L_IfCA1kCRVz0rzon7H5EjkbKUco4bMzPRQyDqv25ViGZFdlSJ_GxRkES8uGdkwGazldXUTv-tHI6q4_Ou9PJfcM80qXMdDMXVPMdD6uOiGrUooD6/-oPclDZe_FeaF3zkmV64GTuF-i5OpCQu3eZzZn4iFPzpveSCh8Dl9xk8b3BOrMLolehHULhTjW7f9iyvbuaZ1nQ1-VGc5lzGPePmY1T7MmZb22fskfFhCzKjlEf8sMCt/mxf0D7-ZqZnj5dJ-PrC6xSY6hTuQZy0Sferxx8Ag0_z6gd0ATfOaEdkaVpEIdWPNXqiPSozGitZF1DgPCRGlve8I9pQUw2Ld7kjkbhEgKIuq6yYOvuhBMkAERvwOddxk/.../

http://dw.uptodown.com/dwn/OCg7O-Zl7Rb4Y-CAp4i-8S2DX80dgeKajwm108xzvCq2VfG0t-J0W86Ogz8B3-4RRkKBo6RJEBQPXNNI44BsP_pZsn8fl4iaadSFnUZSF672GgigelTklt-WdmjM0oL4/dXTO0bbXaIVOHG2nMtthe5BktqdG3sbZCMuQmF1_cY2pbtaPDfjdF33WieBKBaoaSTk7f_8cYmJ-disbBo9XsyPFplphxnCgXc6Z6Zkurane15CT93rg0pvVihxxMf_s/iXnpqhMRi58z3AQ7rIdRlksJ1sSiZSUNQIoYB84Y3uHJaHNpdD7Zfy3e9v05uki_RzCqUOpl6wmZfDQ0nbH-D1wjpFvF7UWqBWo8ssYiVm_6osRS0U4S-tIgAsZkWjiV/.../

https://dw.uptodown.com/dwn/k5wY9opZT1cXktAUiqoij2Vw7XUpYJLojD4Ax6kdW_5DmM91XzsFie2GJvW86U1RXnel0T6Wy0NVqjmu3Of9u4hbHdLroWclN7pXnimowNzPIuVaK25a7w_S2nqc93Cx/MjEI8GusWmvBi785q26TBN-KFpqmXY1sxi_aTJZ_k6RDWihq4JB78NgLJTcE8awxOdz1BRk4CBB-4Ra1hh3VF2I_fwcocGowDcieFbmnYAi1Q7OAJ1uuDzezfMkrxi8p/h0FjejIUk-rtbEQApV4Qr7VLFFULIpntFArXGHczP63ONE3xeHBvbUE8HQ4sSBag0bRJLW7C4fAvCyGcbikq6SG2NwsrxjnjpJCb7BdaCnKtQ8L88LNsbpTcn05gGbhj/.../

http://dw.uptodown.com/dwn/KNgJya42U6G8BEJSRzleJKtmTO1H5UuGU8MjqRbgV-GcmY2MZpJofYf6HSY2xqcFgv9loort3jOlAGSawpclIdCNCviqRVvcGrAJ7FWtKbN7ZHwK1Y0YxE6K0qbjNJQo/iRICovdNa6TkaRss8nCxTdeKBLnWvmZajIBGTxKvGgcTAjgkDoCUdzMi-aNmIGx0dMyl_a9OzrXjwLE6oc-2WbbIe8KSHEMQJtTHQgr4w70u3UGBOJBSsn3RSh0ao1mc/Olhuixu-1cOjCTcw5dcdFc5f8Q3YPJFBQYWbizdc9Mc-DjT7fR7oCmRHMn7yJ0039_aZG0JmIjNQW4HHtgnXXvcyqYiRLUUSEsaNBupWdc9mvwqrHzX4ONeh9M2rtmp6/.../

http://dw.uptodown.com/dwn/S7B_fP9Tv_tRg4xlVtVrfIAgI6dskwCtEooPKsVE_ZAKmpvTbUBJ7BIdaYhWmRy0gHAR_FTpmlT9bBEQMPTISNUlB46-JyOCCVPIb3SzCzdhvFFP5q6ilNmhOOeJZyxT/ByM21TwM0eslc6dZljxgv9N5qnH1WFvkJ0F2KM-wnStvaPuF2ETfxIICT0g02poij4p3O_wocFE0dBH4A0l77JHiyu9sQDKP1Xma2ba_5JFzNmsZJfPEH3I3B5gF0R5d/.../

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