Sample viewer

vx.netlux.org/Virus.DOS.Letran.723

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GIF

Syscalls:

Time Syscall Op Syscall Name
2018-12-17T22:52:06.414814282Z 42 PC: 12a70 | Get date 0x12a70: cmp dl, 0x1f
0x12a73: jne 0x12a7c
0x12a75: cmp dh, 0xc
0x12a78: jne 0x12a7c
0x12a7a: jmp 0x12afa
0x12a7c: mov ah, 0x47
0x12a7e: xor dl, dl
0x12a80: lea si, word ptr [bp + 0x1fb]
0x12a84: int 0x21
0x12a86: mov ah, 0x1a
0x12a88: lea dx, word ptr [bp + 0x23a]
0x12a8c: int 0x21
0x12a8e: mov ah, 0x4e
0x12a90: mov cx, 0x27
0x12a93: lea dx, word ptr [bp + 0x1f1]
0x12a97: int 0x21
0x12a99: jae 0x12a9e
0x12a9b: jmp 0x12b24
0x12a9e: mov ax, 0x4301
0x12aa1: xor cx, cx
2018-12-17T22:52:06.418088994Z 71 PC: 12a86 | Get current directory
2018-12-17T22:52:06.421123093Z 26 PC: 12a8e | Set disk transfer address
2018-12-17T22:52:06.422330071Z 78 PC: 12a99 | Find first file
2018-12-17T22:52:06.429059952Z 67 PC: 12aa9 | Get or set file attributes
2018-12-17T22:52:06.445477004Z 61 PC: 12aae | Open file (Filename = 'SLEEP.COM')
2018-12-17T22:52:06.452214664Z 63 PC: 12abb | Read file or device (Read 5 bytes on handle 5)
2018-12-17T22:52:06.460324517Z 66 PC: 12acd | Move file pointer
2018-12-17T22:52:06.462063364Z 64 PC: 12cde | Write file or device (Write 723 bytes on handle 5)
2018-12-17T22:52:06.471043417Z 66 PC: 12cf8 | Move file pointer
2018-12-17T22:52:06.47223907Z 64 PC: 12d03 | Write file or device (Write 5 bytes on handle 5)
2018-12-17T22:52:06.478742602Z 87 PC: 12d10 | Get or set file date and time
2018-12-17T22:52:06.480298988Z 62 PC: 12d14 | Close file
2018-12-17T22:52:06.487834265Z 67 PC: 12ae6 | Get or set file attributes
2018-12-17T22:52:06.497885815Z 59 PC: 12aee | Change current directory
2018-12-17T22:52:06.501982292Z 26 PC: 12af5 | Set disk transfer address

{"DateBased":true,"Day":31,"Month":1,"Year":1980,"Hour":0,"Min":0,"Second":0,"TimeBased":false,"OriginalID":10780,"SideJobID":0}

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GIF

Syscalls:

Time Syscall Op Syscall Name
2018-12-25T12:29:13.290323131Z 42 PC: 12a70 | Get date 0x12a70: cmp dl, 0x1f
0x12a73: jne 0x12a7c
0x12a75: cmp dh, 0xc
0x12a78: jne 0x12a7c
0x12a7a: jmp 0x12afa
0x12a7c: mov ah, 0x47
0x12a7e: xor dl, dl
0x12a80: lea si, word ptr [bp + 0x1fb]
0x12a84: int 0x21
0x12a86: mov ah, 0x1a
0x12a88: lea dx, word ptr [bp + 0x23a]
0x12a8c: int 0x21
0x12a8e: mov ah, 0x4e
0x12a90: mov cx, 0x27
0x12a93: lea dx, word ptr [bp + 0x1f1]
0x12a97: int 0x21
0x12a99: jae 0x12a9e
0x12a9b: jmp 0x12b24
0x12a9e: mov ax, 0x4301
0x12aa1: xor cx, cx
2018-12-25T12:29:13.305754833Z 71 PC: 12a86 | Get current directory
2018-12-25T12:29:13.30870698Z 26 PC: 12a8e | Set disk transfer address
2018-12-25T12:29:13.30978961Z 78 PC: 12a99 | Find first file
2018-12-25T12:29:13.315802155Z 67 PC: 12aa9 | Get or set file attributes
2018-12-25T12:29:13.331599243Z 61 PC: 12aae | Open file (Filename = 'SLEEP.COM')
2018-12-25T12:29:13.339561758Z 63 PC: 12abb | Read file or device (Read 5 bytes on handle 5)
2018-12-25T12:29:13.346001066Z 66 PC: 12acd | Move file pointer
2018-12-25T12:29:13.348962788Z 64 PC: 12cde | Write file or device (Write 723 bytes on handle 5)
2018-12-25T12:29:13.358022777Z 66 PC: 12cf8 | Move file pointer
2018-12-25T12:29:13.359395419Z 64 PC: 12d03 | Write file or device (Write 5 bytes on handle 5)
2018-12-25T12:29:13.367017835Z 87 PC: 12d10 | Get or set file date and time
2018-12-25T12:29:13.368517558Z 62 PC: 12d14 | Close file
2018-12-25T12:29:13.376057091Z 67 PC: 12ae6 | Get or set file attributes
2018-12-25T12:29:13.393595155Z 59 PC: 12aee | Change current directory
2018-12-25T12:29:13.39744736Z 26 PC: 12af5 | Set disk transfer address

{"DateBased":true,"Day":31,"Month":12,"Year":1980,"Hour":0,"Min":0,"Second":0,"TimeBased":false,"OriginalID":10780,"SideJobID":0}

.

GIF

Syscalls:

Time Syscall Op Syscall Name
2018-12-25T12:29:13.293187893Z 42 PC: 12a70 | Get date 0x12a70: cmp dl, 0x1f
0x12a73: jne 0x12a7c
0x12a75: cmp dh, 0xc
0x12a78: jne 0x12a7c
0x12a7a: jmp 0x12afa
0x12a7c: mov ah, 0x47
0x12a7e: xor dl, dl
0x12a80: lea si, word ptr [bp + 0x1fb]
0x12a84: int 0x21
0x12a86: mov ah, 0x1a
0x12a88: lea dx, word ptr [bp + 0x23a]
0x12a8c: int 0x21
0x12a8e: mov ah, 0x4e
0x12a90: mov cx, 0x27
0x12a93: lea dx, word ptr [bp + 0x1f1]
0x12a97: int 0x21
0x12a99: jae 0x12a9e
0x12a9b: jmp 0x12b24
0x12a9e: mov ax, 0x4301
0x12aa1: xor cx, cx
2018-12-25T12:29:13.29631499Z 9 PC: 12b02 | Display string (String= 'Tienes metido en tu ordenador un virus inofensivo llamado � :-) Este virus esta dedicado a la �nica, la maravillosa, la sensacional letra: ������ �� � � � � � � � � �� ')

{"DateBased":true,"Day":1,"Month":1,"Year":1980,"Hour":0,"Min":0,"Second":0,"TimeBased":false,"OriginalID":10780,"SideJobID":0}

.

GIF

Syscalls:

Time Syscall Op Syscall Name
2018-12-25T12:29:13.858361196Z 42 PC: 12a70 | Get date 0x12a70: cmp dl, 0x1f
0x12a73: jne 0x12a7c
0x12a75: cmp dh, 0xc
0x12a78: jne 0x12a7c
0x12a7a: jmp 0x12afa
0x12a7c: mov ah, 0x47
0x12a7e: xor dl, dl
0x12a80: lea si, word ptr [bp + 0x1fb]
0x12a84: int 0x21
0x12a86: mov ah, 0x1a
0x12a88: lea dx, word ptr [bp + 0x23a]
0x12a8c: int 0x21
0x12a8e: mov ah, 0x4e
0x12a90: mov cx, 0x27
0x12a93: lea dx, word ptr [bp + 0x1f1]
0x12a97: int 0x21
0x12a99: jae 0x12a9e
0x12a9b: jmp 0x12b24
0x12a9e: mov ax, 0x4301
0x12aa1: xor cx, cx
2018-12-25T12:29:13.860815172Z 71 PC: 12a86 | Get current directory
2018-12-25T12:29:13.863604859Z 26 PC: 12a8e | Set disk transfer address
2018-12-25T12:29:13.864604746Z 78 PC: 12a99 | Find first file
2018-12-25T12:29:13.871677764Z 67 PC: 12aa9 | Get or set file attributes
2018-12-25T12:29:14.688947738Z 61 PC: 12aae | Open file (Filename = 'SLEEP.COM')
2018-12-25T12:29:14.697327757Z 63 PC: 12abb | Read file or device (Read 5 bytes on handle 5)
2018-12-25T12:29:14.704530231Z 66 PC: 12acd | Move file pointer
2018-12-25T12:29:14.707306333Z 64 PC: 12cde | Write file or device (Write 723 bytes on handle 5)
2018-12-25T12:29:14.728350909Z 66 PC: 12cf8 | Move file pointer
2018-12-25T12:29:14.729418984Z 64 PC: 12d03 | Write file or device (Write 5 bytes on handle 5)
2018-12-25T12:29:14.734199937Z 87 PC: 12d10 | Get or set file date and time
2018-12-25T12:29:14.735330211Z 62 PC: 12d14 | Close file
2018-12-25T12:29:14.740489884Z 67 PC: 12ae6 | Get or set file attributes
2018-12-25T12:29:14.746974386Z 59 PC: 12aee | Change current directory
2018-12-25T12:29:14.749528954Z 26 PC: 12af5 | Set disk transfer address