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b2db.tmp

Beijing Caiyunshidai Technology Co., Ltd.

The file b2db.tmp by Beijing Caiyunshidai Technology Co. has been detected as a potentially unwanted program by 1 anti-malware scanner with very strong indications that the file is a potential threat. While running, it connects to the Internet address server-52-85-83-238.lax1.r.cloudfront.net on port 80 using the HTTP protocol.
Publisher:
Beijing Caiyunshidai Technology Co., Ltd.  (signed and verified)

MD5:
1b03bc47f839e1fc57d91710df65e1fd

SHA-1:
571bd8247141334d5f9a4a929a87b266c63113d9

SHA-256:
8455935b0a685d5e13badbf570aa8ad96d946ac435cadf4c074931a157d27f1d

Scanner detections:
1 / 68

Status:
Potentially unwanted

Analysis date:
2/25/2025 6:12:10 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
Adware.ELEX.SpeedSearch (M)
17.2.3.0

File size:
421.7 KB (431,848 bytes)

Common path:
C:\windows\temp\b2db.tmp

Digital Signature
Signed by:
Beijing Caiyunshidai Technology Co., Ltd.

Authority:
thawte, Inc.

Valid from:
1/21/2017 7:00:00 AM

Valid to:
3/4/2017 6:59:59 AM

Subject:
CN="Beijing Caiyunshidai Technology Co., Ltd.", O="Beijing Caiyunshidai Technology Co., Ltd.", L=Beijing, S=Beijing, C=CN

Issuer:
CN=thawte SHA256 Code Signing CA, O="thawte, Inc.", C=US

Serial number:
378DEFDD636617682E5EC12F97DFF1D2

File PE Metadata
Compilation timestamp:
1/19/2017 8:16:33 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

Entry address:
0x5F4E

Entry point:
E8, 58, 3F, 00, 00, E9, 9A, 62, 00, 00, 55, 8B, EC, 56, 8B, 75, 08, 83, FE, E0, 77, 6F, 53, 57, A1, F4, 8C, 46, 00, 85, C0, 75, 1D, E8, D2, 32, 00, 00, 6A, 1E, E8, FA, C0, FF, FF, 68, FF, 00, 00, 00, E8, 1A, 49, 00, 00, A1, F4, 8C, 46, 00, 59, 59, 85, F6, 74, 04, 8B, CE, EB, 03, 33, C9, 41, 51, 6A, 00, 50, FF, 15, 20, 00, 46, 00, 8B, F8, 85, FF, 75, 26, 6A, 0C, 5B, 39, 05, F0, 8C, 46, 00, 74, 0D, 56, E8, 8F, 3F, 00, 00, 59, 85, C0, 75, A9, EB, 07, E8, D2, FB, FF, FF, 89, 18, E8, CB, FB, FF, FF, 89, 18, 8B...
 
[+]

Entropy:
7.8103  (probably packed)

Code size:
378 KB (387,072 bytes)

The executing file has been seen to make the following network communications in live environments.

TCP (HTTP):
Connects to server-52-85-83-77.lax1.r.cloudfront.net  (52.85.83.77:80)

TCP (HTTP):
Connects to server-52-85-83-69.lax1.r.cloudfront.net  (52.85.83.69:80)

TCP (HTTP):
Connects to server-52-84-246-59.sfo20.r.cloudfront.net  (52.84.246.59:80)

TCP (HTTP):
Connects to server-52-84-246-56.sfo20.r.cloudfront.net  (52.84.246.56:80)

TCP (HTTP):
Connects to server-52-84-246-37.sfo20.r.cloudfront.net  (52.84.246.37:80)

TCP (HTTP):
Connects to server-52-84-246-219.sfo20.r.cloudfront.net  (52.84.246.219:80)

TCP (HTTP):
Connects to server-52-84-246-188.sfo20.r.cloudfront.net  (52.84.246.188:80)

TCP (HTTP):
Connects to server-52-85-83-24.lax1.r.cloudfront.net  (52.85.83.24:80)

TCP (HTTP):
Connects to server-52-85-83-238.lax1.r.cloudfront.net  (52.85.83.238:80)

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