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1stbrowser.exe

The application 1stbrowser.exe has been detected as a potentially unwanted program by 1 anti-malware scanner with very strong indications that the file is a potential threat. This is a setup program which is used to install the application. The file has been seen being downloaded from vzbucket.go.im.
MD5:
3bd32c71c86f39974e85dc6c26eb60f6

SHA-1:
557fca5fc111f55a77416f5f64bfb213ad61f076

SHA-256:
667e885452bcf6bca4c618549e4143dcb6ce1d97c5bfbb1f8d20b62e28c8ff29

Scanner detections:
1 / 68

Status:
Potentially unwanted

Analysis date:
11/23/2024 11:00:13 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.SIEN.1stBrowser.Meta (M)
16.3.23.15

File size:
39.8 MB (41,747,944 bytes)

File type:
Executable application (Win32 EXE)

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\1stbrowser.exe

File PE Metadata
Compilation timestamp:
12/31/2015 8:01:24 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

CTPH (ssdeep):
786432:Uoq3la4e/NR7tU8xSkG2y69XwZqIAZKohkN2FIbtfYuGdLlvS9kvQi:Uo4lpeFR7t7x/pwZ3mlubpoa9o

Entry address:
0x2137

Entry point:
6A, 00, FF, 15, B4, 40, 40, 00, 50, E8, 98, 09, 00, 00, 59, 50, FF, 15, A0, 40, 40, 00, CC, 55, 8B, EC, 81, EC, 14, 02, 00, 00, 53, 56, 8B, 75, 14, 85, F6, 0F, 84, BE, 00, 00, 00, FF, 75, 08, 8D, 4D, F8, FF, 75, 0C, FF, 75, 10, E8, EE, 0C, 00, 00, 8D, 4D, F8, E8, 0B, 0D, 00, 00, 84, C0, 0F, 84, 9D, 00, 00, 00, 8D, 4D, F8, E8, 03, 0D, 00, 00, 83, F8, 01, 0F, 82, 8C, 00, 00, 00, 8D, 4D, F8, E8, F2, 0C, 00, 00, 3B, 05, E0, 14, 40, 00, 77, 7C, FF, 36, 33, C0, BB, 04, 01, 00, 00, 66, 89, 45, F4, 66, 89, 85, EC...
 
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Packer / compiler:
FASM v1.3x

Code size:
8 KB (8,192 bytes)

The file 1stbrowser.exe has been seen being distributed by the following URL.

http://vzbucket.go.im/6ae76ba4-7119-45c8-94ed-52f23abece69/build/.../0a7fbb57-ce10-4193-82ac-d052eedd3e3e.exe

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