2017年11月第3周勒索病毒週報


2017年11月第3周勒索病毒週報




騰訊電腦管家在過去的一週（2017/11/13-2017/11/19）捕獲3例新勒索病毒和4例已知勒索病毒的變種，其中主要是以伺服器為攻擊目標的XTBL家族勒索病毒的持續傳播。



上週電腦管家破解了勒索病毒Allcry的加密演算法，且開發出解密工具供使用者下載；同時還發現了偽裝成學生調查問卷的勒索病毒，不過目前還是個半成品並無加密功能。



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、 Allcry勒索病毒解密工具



經分析發現Allcry勒索病毒加密演算法存在漏洞，電腦管家上週已破解該演算法，並針對此勒索病毒推出解密工具。不幸中招的使用者，可以通過連結



https://habo.qq.com/tool/detail/allcrykiller下載解密工具。






二、 Cryptomix勒索病毒變種xzzx





11月13日，發現Cryptomix變種xzzx，該變種相對於之前並沒有太多變化，在斷網環境下同樣支援加密檔案。該變種加密檔案後，將字尾修改為“.xzzx”，同時留下聯絡郵箱。






三、 GlobalImposter勒索病毒變種kimchenyn



11月13日，發現GlobalImposter變種kimchenyn，加密後文件以“.kimchenyn”作為字尾，並且不法分子會根據實際加密情況確定贖金金額。






四、 XTBL勒索病毒變種arena、scarab



上週XTBL勒索病毒呈持續傳播趨勢，部分公司伺服器陸續遭到其變種arena、scarab的攻擊。該類勒索病毒變種往往通過弱口令遠端登入電腦，進而傳播執行病毒。防範該勒索病毒攻擊，公司伺服器平時應注意不要隨意使用弱口令，及時更新補丁修復漏洞。








五、 jCandy勒索病毒



11月14日，發現jCandy勒索病毒，該病毒加密檔案後以“.Locked-jCandy”作為字尾，勒索價值200美元的比特幣作為解密贖金。






六、 pablukl0cker勒索病毒



11月15日，發現pablukl0cker勒索病毒，該病毒偽裝成lol輔助工具傳播，加密檔案後以“.##ENCRYPTED_BY_pablukl0cker##”作為字尾，勒索價值1500美元的比特幣作為解密贖金，並威脅使用者越晚交贖金就會有越多檔案被永久刪除。








七、J. Sterling調查問卷勒索病毒



11月16日，發現新勒索病毒偽裝成學生調查問卷誘導使用者點選執行。該樣本執行後，首先會彈出登陸介面，提示輸入賬號密碼，以及選擇年級。一旦使用者輸入資訊，電腦便會自動彈出敲詐介面，要求使用者支付價值10美元的比特幣來解密檔案。不過該樣本目前還是個半成品，並沒有加密功能，並且從提示上看其目標使用者僅針對美國伊利諾州公立高階中學，但這也說明勒索病毒的攻擊手段越發多樣化，大家平時使用電腦時應該更注意安全。









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

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

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/… – Hector Blandin Nov 17 &
Read more

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