2017年11月第4周勒索病毒週報


2017年11月第4周勒索病毒週報




騰訊電腦管家在過去的一週（2017/11/20-2017/11/26）捕獲4例新勒索病毒和3例已知勒索病毒的變種。值得注意的是，Scarab勒索病毒在全球範圍內藉助釣魚郵件傳播，據海外安全專家分析，其釣魚郵件數量高達上千萬封。



同時，電腦管家發現“WannaDie”和“WannaSmile”等Wanna系列勒索病毒，不僅蹭Wannacry熱點，勒索介面也高度相似；此外，電腦管家還發現和使用者“開玩笑”的Girlsomware勒索病毒，其不具備加密功能卻提示使用者檔案被加密，要求使用者點選54個勾選項才可以解密。



該段時間出現的勒索病毒及變種，騰訊電腦管家都可進行攔截免疫。



一、XTBL勒索病毒變種java



11月22日，發現XTBL家族變種java勒索病毒，該變種加密檔案後，將字尾修改為“.java”，同時留下聯絡郵箱，不法分子根據受害者猶豫時間長短來索要具體贖金金額。






二、鎖屏勒索病毒Locket



11月22日，發現鎖屏勒索病毒Locket。一旦執行該病毒，電腦螢幕會被鎖定，使用者無法正常使用電腦。根據勒索提示，不同臺機器對應不同的解鎖密碼，每臺電腦都有自己“專屬”的解鎖密碼，受害者必須支付價值50美元的比特幣才能獲得解鎖密碼。然而經分析，該解鎖密碼為ul62bfqSA，並不存在每臺機器不同解鎖密碼的情況。








三、GlobelImposter勒索病毒變種lpcrestore



11月22日，發現GlobelImposter勒索病毒變種lpcrestore，加密後文件以“.lpcrestore”作為字尾，不法分子根據受害者猶豫時間長短來索要具體贖金金額。






四、HiddenTear勒索病毒變種Cryp70n1c



本週發現HiddenTear勒索病毒變種Cryp70n1c，加密檔案後以“.cryp70n1c”作為字尾，勒索0.05個比特幣作為解密贖金。








五、IGotYour勒索病毒



11月24日，發現IGotYor勒索病毒，加密檔案後以“.IGotYour”作為字尾，勒索10000盧比（約1000人民幣）作為解密贖金。但是目前該樣本還是個半成品，僅僅會加密C:Test目錄下的檔案。






六、Scarab勒索病毒



11月24日，騰訊電腦管家在國內率先捕獲利用Necurs殭屍網路傳播的Scarab勒索病毒。Scarab勒索病毒通過偽裝成圖片資料的釣魚郵件傳播，據海外安全專家分析，不法分子在半天時間內就傳送了上千萬封釣魚郵件。該勒索病毒加密檔案後以“.[[email protected]].scarab”作為字尾，不法分子根據受害者猶豫時間長短來索要具體贖金金額。






七、Girlsomware勒索病毒





本週發現和使用者“開玩笑”的Girlsomware勒索病毒，執行後會彈出勒索介面，提示受害者電腦檔案已經被加密，必須要勾上右邊54個選項框才可以解密，實際上該樣本並沒有加密功能，不會加密任何檔案。






八、Wanna系列勒索病毒



發現“想死”（WannaDie）及“想笑”（WannaSmile）兩款新型勒索病毒，“山寨”Wanna系列的命名方式。其中，”想死”勒索病毒加密檔案後，以“.wndie”作為字尾，“想笑”則是以“.wsmile”作為字尾。從命名方式上看，“想死”和“想笑”似乎與WannaCry屬於同一病毒家族，勒索介面也高度相似，但相互之間並沒有關聯。






在全球互聯的大背景下，勒索病毒將越來越具威脅性，文件安全問題也日益嚴峻，騰訊電腦管家針對使用者對文件保護的迫切需求，釋出文件守護者工具，為使用者打造出高效、實用的檔案保護方案。開啟電腦管家【工具箱】-【文件】-【文件守護者】，全面保護文件安全。













Comments

Post a Comment

Popular posts from this blog

What is the equation of a 3D cone with generalised tilt?

Image
Clash Royale CLAN TAG #URR8PPP up vote 2 down vote favorite What is the equation of a 3D cone with generalized tilt? I've noticed that in most equations given to represent a cone, there is no parameter which defines the tilt of the cone in 3D space and that most of them have their point at the origin $(0,0,0)$ - I was wondering if anyone could give me a more generalized cone equation for a cone in any position in 3D space 3d share | cite | improve this question edited Jul 25 '16 at 0:05 ervx 9,425 3 13 36 asked Jul 24 '16 at 15:38 Charlene 11 2 2 Welcome to Math.SE! Could you please explain a few things to help people give an answer useful to you: 1. What do you mean by "generalized tilt"? 2. Are you asking about a right circular cone? Does the angle at the vertex matter? 3. What form of answer (implicit, parametric...?) are you looking for? 4. If this is homework, what tools do you have available, an...
Read more

Relationship between determinant of matrix and determinant of adjoint?

Image
Clash Royale CLAN TAG #URR8PPP up vote 2 down vote favorite We are studying adjoints in class, and I was curious if there is a relationship between the determinant of matrix A, and the determinant of the adjoint of matrix A? I assume there would be a relationship because finding the adjoint requires creating a cofactor matrix and then transposing it. linear-algebra determinant adjoint-operators share | cite | improve this question asked Nov 17 '17 at 17:32 CluelessCoder 32 5 For a square matrix $A$ of order $n$, we have $A(operatornameadj A)=(operatornameadj A)A=|A|I_n$ where $I_n$ is the identity matrix of order $n$. This should tell you about the determinant of the adjoint in terms of that of $A$ (use multiplicative property and other elementary properties of determinants). – Prasun Biswas Nov 17 '17 at 17:35 1 @CluelessCoder: see here: math.stackexchange.com/questions/516127/…...
Read more

Color the edges and diagonals of a regular polygon

Image
Clash Royale CLAN TAG #URR8PPP up vote 5 down vote favorite 1 Here is the problem: For what $n$ is it possible to color the edges and diagonals of an $n$-side regular polygon with $dfracbinomn23$ colors, such that you use every color exactly three times and for every color the three segments (edges or diagonals) with that color form a triangle? Trivially $nequiv 0 text or 1 pmod3$. I can also prove that if the statement is true for $k$ than it is true for $3k$ as well. How to finish? Please help! Thanks combinatorial-geometry share | cite | improve this question edited Aug 6 at 21:57 alcana 118 4 asked Aug 6 at 21:15 Leo Gardner 356 11 Even assuming "polyhpn" in the title is a typo for polygon , it is unclear what you mean by "the edges and sides". Aren't the side of a regular polygon the same as the edges? A regular $n$-sided polygon has $n$ edges. – hardmath Aug 6 at 21:20 3 $n$ ne...
Read more