Static task
static1
Behavioral task
behavioral1
Sample
chkdsk.exe
Resource
win7-20230220-en
Behavioral task
behavioral2
Sample
chkdsk.exe
Resource
win10v2004-20230220-en
General
-
Target
chkdsk.exe
-
Size
22KB
-
MD5
b4016bee9d8f3ad3d02dd21c3cafb922
-
SHA1
82256b26a70a38fed9af0080cd4b07320041c69b
-
SHA256
1d5227595aeb4ff3ceeb620e94b5342955667eeacd000e2a4be748ad94583daf
-
SHA512
ec9032f1889cba56e6340a52963bbcb8f83d7b5d60ad11642cc6204836295d46f29192f8b62ae70a2a132aad473b873bc928b14a4d96f2b0483dd078557eee4c
-
SSDEEP
384:2RNnyRmBn6gPnAQReaUCGOf0jJUlvlGs0trLhpNSWSFKhW:HmBn6gPnAQReaUCG60Xp6K
Malware Config
Signatures
-
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource chkdsk.exe
Files
-
chkdsk.exe.exe windows x86
52f0d0726da8ad61a069466457e67f74
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_GUARD_CF
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_32BIT_MACHINE
Imports
api-ms-win-eventlog-legacy-l1-1-0
RegisterEventSourceW
DeregisterEventSource
ReportEventW
ntdll
RtlUnhandledExceptionFilter
NtTerminateProcess
api-ms-win-core-errorhandling-l1-1-0
SetUnhandledExceptionFilter
SetErrorMode
GetLastError
api-ms-win-core-heap-l1-1-0
HeapSetInformation
ulib
?DisableBreakHandling@KEYBOARD@@SGEXZ
?AnalyzePath@PATH@@QAE?AW4PATH_ANALYZE_CODE@@PAVWSTRING@@PAV1@0@Z
?IsGuidVolName@PATH@@QAEEXZ
?AppendString@PATH@@QAEEPBVWSTRING@@@Z
?IsDrive@PATH@@QBEEXZ
??1PATH@@UAE@XZ
?Initialize@PATH@@QAEEPBVWSTRING@@E@Z
??0PATH@@QAE@XZ
?MakeFileToken@MESSAGE@@SG_KPBD@Z
?QueryPackedLog@MESSAGE@@QAEEPAVHMEM@@PAK@Z
?Initialize@PATH_ARGUMENT@@QAEEPADE@Z
?DisplayMsg@MESSAGE@@QAAEKPBDZZ
?DisplayMsg@MESSAGE@@QAAEKW4MESSAGE_TYPE@@KPBDZZ
?Display@MESSAGE@@QAAEPBDZZ
Get_Standard_Output_Stream
?Resize@HMEM@@QAEEKK@Z
?Initialize@HMEM@@QAEEXZ
??1HMEM@@UAE@XZ
??0HMEM@@QAE@XZ
?Strcat@WSTRING@@QAEEPBV1@@Z
?Initialize@WSTRING@@QAEEPBV1@KK@Z
?Initialize@WSTRING@@QAEEPBGK@Z
?Initialize@WSTRING@@QAEEPBDK@Z
??0CHKDSK_MESSAGE@@QAE@XZ
?DisplayMsg@MESSAGE@@QAEEK@Z
?Initialize@FSTRING@@QAEPAVWSTRING@@PAGK@Z
??8WSTRING@@QBEEABV0@@Z
?Strupr@WSTRING@@QAEPAV1@XZ
?Stricmp@WSTRING@@QBEJPBV1@@Z
??1CHKDSK_MESSAGE@@UAE@XZ
??0FLAG_ARGUMENT@@QAE@XZ
?Initialize@FLAG_ARGUMENT@@QAEEPAD@Z
??0ARRAY@@QAE@XZ
??1ARRAY@@UAE@XZ
?Initialize@ARRAY@@QAEEKK@Z
?DeleteAllMembers@ARRAY@@UAEEXZ
?Put@ARRAY@@UAEEPAVOBJECT@@@Z
??0LONG_ARGUMENT@@QAE@XZ
?Initialize@LONG_ARGUMENT@@QAEEPAD@Z
?SqmExportOnError@SQMEXPORT@@SGXKKEE_KU_GUID@@@Z
Get_Standard_Input_Stream
??0DSTRING@@QAE@XZ
??1DSTRING@@UAE@XZ
?EnableBreakHandling@KEYBOARD@@SGEXZ
?Initialize@CHKDSK_MESSAGE@@QAEEPAVSTREAM@@00@Z
?Set@CHKDSK_MESSAGE@@UAEEKW4MESSAGE_TYPE@@K@Z
??0STRING_ARGUMENT@@QAE@XZ
??1STRING_ARGUMENT@@UAE@XZ
?Initialize@STRING_ARGUMENT@@QAEEPAD@Z
??0ARGUMENT_LEXEMIZER@@QAE@XZ
??1ARGUMENT_LEXEMIZER@@UAE@XZ
?Initialize@ARGUMENT_LEXEMIZER@@QAEEPAVARRAY@@@Z
?DoParsing@ARGUMENT_LEXEMIZER@@QAEEPAVARRAY@@@Z
?QueryInvalidArgument@ARGUMENT_LEXEMIZER@@QAEPAVWSTRING@@XZ
?PrepareToParse@ARGUMENT_LEXEMIZER@@QAEEPAVWSTRING@@@Z
?SetCaseSensitive@ARGUMENT_LEXEMIZER@@QAEXE@Z
??1OBJECT@@UAE@XZ
?IsValueSet@ARGUMENT@@QAEEXZ
?QueryCurrentDosDriveName@SYSTEM@@SGEPAVWSTRING@@@Z
?QueryDriveType@SYSTEM@@SG?AW4DRIVE_TYPE@@PBVWSTRING@@@Z
?QueryLibraryEntryPoint@SYSTEM@@SGP6GHXZPBVWSTRING@@0PAPAX@Z
?QueryNextLibraryEntryPoint@SYSTEM@@SGP6GHXZPAXPBVWSTRING@@@Z
?FreeLibraryHandle@SYSTEM@@SGXPAX@Z
??0FSTRING@@QAE@XZ
??0PATH_ARGUMENT@@QAE@XZ
??1FSTRING@@UAE@XZ
??1PATH_ARGUMENT@@UAE@XZ
?Log@MESSAGE@@QAAEPBDZZ
ifsutil
?QueryID@DP_DRIVE@@QAEEPAU_GUID@@PBVWSTRING@@@Z
?Initialize@DP_DRIVE@@QAEEPBVWSTRING@@PAVMESSAGE@@EE@Z
??1DP_DRIVE@@UAE@XZ
?IsFatalError@SNAPSHOT@@SGEJ@Z
?ReleaseVolumeSnapshot@SNAPSHOT@@SGEPAV1@@Z
?GetVolumeSnapshot@SNAPSHOT@@SGJPAVWSTRING@@PAPAV1@@Z
??0DP_DRIVE@@QAE@XZ
?IsVolumeDirty@IFS_SYSTEM@@SGEPAVWSTRING@@PAE1PAJ@Z
?QuerySnapshotDiffAreaVolume@SNAPSHOT@@QAEEPAVWSTRING@@@Z
?QueryVolumeSize@IFS_SYSTEM@@SGEPBVWSTRING@@PA_K@Z
?DosDriveNameToNtDriveName@IFS_SYSTEM@@SGEPBVWSTRING@@PAV2@@Z
?QueryFileSystemName@IFS_SYSTEM@@SGEPBVWSTRING@@PAV2@PAJ1@Z
?GetSnapshotNtDeviceName@SNAPSHOT@@QAEPAGXZ
?GetSnapshotErrorMessage@SNAPSHOT@@SGEJPAVWSTRING@@@Z
msvcrt
_XcptFilter
__p__commode
_controlfp
?terminate@@YAXXZ
_except_handler4_common
_initterm
__setusermatherr
__p__fmode
_cexit
_exit
exit
__set_app_type
__getmainargs
_amsg_exit
api-ms-win-core-synch-l1-2-0
Sleep
api-ms-win-core-libraryloader-l1-2-0
GetModuleHandleW
Sections
.text Size: 12KB - Virtual size: 12KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.data Size: 512B - Virtual size: 888B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.idata Size: 5KB - Virtual size: 4KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.rsrc Size: 2KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 1KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ