Static task
static1
Behavioral task
behavioral1
Sample
PostalOffice.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
PostalOffice.exe
Resource
win10v2004-20240226-en
General
-
Target
PostalOffice.exe
-
Size
43KB
-
MD5
1b146f0d67b8fcec12ffb06005f7d358
-
SHA1
e6a0e3408ac3d244932f6ce79ea3a67aa29d8093
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SHA256
fc39ec35d767a2c0a178ca9874be8aaf87033f8b834ee8dcb57d3904516e4335
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SHA512
2e9652beda9709608308153ca5e00546c68e920436a67c6dddf87bbb4e57a9126ec7758481937c3734e29470d7392c09ccdaed7745a48ce0281f5ea69f28b124
-
SSDEEP
768:+nrhcmE45hGkQ2oUPP3lLuzZPKqcIBJebOF+d:+VhRtoUPP3lLuBZcQe6F+d
Malware Config
Signatures
-
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource PostalOffice.exe
Files
-
PostalOffice.exe.exe windows:4 windows x86 arch:x86
3e4527351299a7834b0276cad9d4cd76
Headers
File Characteristics
IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_32BIT_MACHINE
Imports
kernel32
CloseHandle
CreateDirectoryA
CreateProcessA
DeleteCriticalSection
EnterCriticalSection
ExitProcess
FindClose
FindFirstFileA
FindNextFileA
FreeLibrary
GetCommandLineA
GetConsoleWindow
GetLastError
GetModuleHandleA
GetProcAddress
InitializeCriticalSection
LeaveCriticalSection
LoadLibraryA
SetUnhandledExceptionFilter
TlsGetValue
VirtualProtect
VirtualQuery
WaitForSingleObject
msvcrt
_strdup
_stricoll
__getmainargs
__mb_cur_max
__p__environ
__p__fmode
__set_app_type
_cexit
_errno
_fpreset
_fullpath
_iob
_isctype
_onexit
_pctype
_setmode
abort
atexit
calloc
free
fwrite
localtime
malloc
mbstowcs
memcpy
memset
realloc
setlocale
signal
sprintf
strcoll
strlen
system
time
tolower
vfprintf
wcstombs
user32
ShowWindow
Sections
.text Size: 12KB - Virtual size: 11KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.data Size: 512B - Virtual size: 28B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rdata Size: 1024B - Virtual size: 916B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
/4 Size: 3KB - Virtual size: 2KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.bss Size: - Virtual size: 112B
IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.idata Size: 2KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.CRT Size: 512B - Virtual size: 24B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.tls Size: 512B - Virtual size: 32B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
/14 Size: 512B - Virtual size: 56B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/29 Size: 7KB - Virtual size: 7KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/41 Size: 512B - Virtual size: 303B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/55 Size: 512B - Virtual size: 456B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
/67 Size: 512B - Virtual size: 56B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ