skochgrabber-main[.]zip

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General

Target

skochgrabber-main.zip
Size

893KB
MD5

3cb95b9caadc6124558c13f74b12e1da
SHA1

ca22967b3ef6420584e11cd53e6eb947e5e2db6d
SHA256

1b92d979f6bae7b35ba997f0af418826bfdc9fa6d735aac1161dc5443ed16efe
SHA512

90c4a04b712205220b3248939f3a0ab71909448ba1484c83f00ab12e073a062cc11b2300922d1628cb32b4a7588752f8164622d053bf21ae674616b537905041
SSDEEP

24576:xRsfyj7JHdGGAfvTbkrqAItD6b6D8J7ko:xufyHJ9DaMr8D8Yo

Score

8^/10

upx

Malware Config

Signatures

Patched UPX-packed file 1 IoCs

Sample is packed with UPX but required header fields are zeroed out to prevent unpacking with the default UPX tool.

resource	yara_rule
static1/unpack002/out.upx	patched_upx

UPX packed file 1 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
static1/unpack001/skochgrabber-main/Components/upx.exe	upx

Unsigned PE 2 IoCs

Checks for missing Authenticode signature.

resource
unpack001/skochgrabber-main/Components/upx.exe
unpack002/out.upx

Files

skochgrabber-main.zip
.zip
skochgrabber-main/Builder.bat
skochgrabber-main/Components/SkochOBF.py
skochgrabber-main/Components/cert
skochgrabber-main/Components/config.json
skochgrabber-main/Components/loader.py
skochgrabber-main/Components/postprocess.py
skochgrabber-main/Components/process.py
skochgrabber-main/Components/rar.exe
.exe windows:5 windows x64 arch:x64

9a33888e10929c185d02249d2b55c15a

Code Sign

7e:93:eb:fb:7c:c6:4e:59:ea:4b:9a:77:d4:06:fc:3b
Certificate

Issuer

CN=Thawte Timestamping CA,OU=Thawte Certification,O=Thawte,L=Durbanville,ST=Western Cape,C=ZA

Not Before

21/12/2012, 00:00

Not After

30/12/2020, 23:59

Subject

CN=Symantec Time Stamping Services CA - G2,O=Symantec Corporation,C=US

Extended Key Usages

ExtKeyUsageTimeStamping

Key Usages

KeyUsageCertSign
KeyUsageCRLSign

0e:cf:f4:38:c8:fe:bf:35:6e:04:d8:6a:98:1b:1a:50
Certificate

Issuer

CN=Symantec Time Stamping Services CA - G2,O=Symantec Corporation,C=US

Not Before

18/10/2012, 00:00

Not After

29/12/2020, 23:59

Subject

CN=Symantec Time Stamping Services Signer - G4,O=Symantec Corporation,C=US

Extended Key Usages

ExtKeyUsageTimeStamping

Key Usages

KeyUsageDigitalSignature

76:25:a5:9e:a4:0a:7e:7b:91:3f:91:07:23:32:8e:26
Certificate

Issuer

CN=Sectigo RSA Code Signing CA,O=Sectigo Limited,L=Salford,ST=Greater Manchester,C=GB

Not Before

04/06/2020, 00:00

Not After

04/06/2023, 23:59

Subject

CN=win.rar GmbH,O=win.rar GmbH,POSTALCODE=10117,STREET=Marienstr. 12,L=Berlin,ST=Berlin,C=DE

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature

39:72:44:3a:f9:22:b7:51:d7:d3:6c:10:dd:31:35:95
Certificate

Issuer

CN=AAA Certificate Services,O=Comodo CA Limited,L=Salford,ST=Greater Manchester,C=GB

Not Before

12/03/2019, 00:00

Not After

31/12/2028, 23:59

Subject

CN=USERTrust RSA Certification Authority,O=The USERTRUST Network,L=Jersey City,ST=New Jersey,C=US

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

1d:a2:48:30:6f:9b:26:18:d0:82:e0:96:7d:33:d3:6a
Certificate

Issuer

CN=USERTrust RSA Certification Authority,O=The USERTRUST Network,L=Jersey City,ST=New Jersey,C=US

Not Before

02/11/2018, 00:00

Not After

31/12/2030, 23:59

Subject

CN=Sectigo RSA Code Signing CA,O=Sectigo Limited,L=Salford,ST=Greater Manchester,C=GB

Extended Key Usages

ExtKeyUsageCodeSigning
ExtKeyUsageTimeStamping

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

76:25:a5:9e:a4:0a:7e:7b:91:3f:91:07:23:32:8e:26
Certificate

Issuer

CN=Sectigo RSA Code Signing CA,O=Sectigo Limited,L=Salford,ST=Greater Manchester,C=GB

Not Before

04/06/2020, 00:00

Not After

04/06/2023, 23:59

Subject

CN=win.rar GmbH,O=win.rar GmbH,POSTALCODE=10117,STREET=Marienstr. 12,L=Berlin,ST=Berlin,C=DE

Extended Key Usages

ExtKeyUsageCodeSigning

Key Usages

KeyUsageDigitalSignature

39:72:44:3a:f9:22:b7:51:d7:d3:6c:10:dd:31:35:95
Certificate

Issuer

CN=AAA Certificate Services,O=Comodo CA Limited,L=Salford,ST=Greater Manchester,C=GB

Not Before

12/03/2019, 00:00

Not After

31/12/2028, 23:59

Subject

CN=USERTrust RSA Certification Authority,O=The USERTRUST Network,L=Jersey City,ST=New Jersey,C=US

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

1d:a2:48:30:6f:9b:26:18:d0:82:e0:96:7d:33:d3:6a
Certificate

Issuer

CN=USERTrust RSA Certification Authority,O=The USERTRUST Network,L=Jersey City,ST=New Jersey,C=US

Not Before

02/11/2018, 00:00

Not After

31/12/2030, 23:59

Subject

CN=Sectigo RSA Code Signing CA,O=Sectigo Limited,L=Salford,ST=Greater Manchester,C=GB

Extended Key Usages

ExtKeyUsageCodeSigning
ExtKeyUsageTimeStamping

Key Usages

KeyUsageDigitalSignature
KeyUsageCertSign
KeyUsageCRLSign

7b:05:b1:d4:49:68:51:44:f7:c9:89:d2:9c:19:9d:12
Certificate

Issuer

CN=VeriSign Universal Root Certification Authority,OU=VeriSign Trust Network+OU=(c) 2008 VeriSign\, Inc. - For authorized use only,O=VeriSign\, Inc.,C=US

Not Before

12/01/2016, 00:00

Not After

11/01/2031, 23:59

Subject

CN=Symantec SHA256 TimeStamping CA,OU=Symantec Trust Network,O=Symantec Corporation,C=US

Extended Key Usages

ExtKeyUsageTimeStamping

Key Usages

KeyUsageCertSign
KeyUsageCRLSign

7b:d4:e5:af:ba:cc:07:3f:a1:01:23:04:22:41:4d:12
Certificate

Issuer

CN=Symantec SHA256 TimeStamping CA,OU=Symantec Trust Network,O=Symantec Corporation,C=US

Not Before

23/12/2017, 00:00

Not After

22/03/2029, 23:59

Subject

CN=Symantec SHA256 TimeStamping Signer - G3,OU=Symantec Trust Network,O=Symantec Corporation,C=US

Extended Key Usages

ExtKeyUsageTimeStamping

Key Usages

KeyUsageDigitalSignature

9c:66:96:14:0c:f3:61:be:84:1b:0f:4b:ea:3c:ad:de:9c:7d:83:fc:e4:45:63:45:74:6c:06:37:d3:d6:f1:16
Signer

Actual PE Digest

9c:66:96:14:0c:f3:61:be:84:1b:0f:4b:ea:3c:ad:de:9c:7d:83:fc:e4:45:63:45:74:6c:06:37:d3:d6:f1:16

Digest Algorithm

sha256

PE Digest Matches

true

1d:57:cb:52:be:34:8e:9b:f0:e9:6c:f8:e2:d5:9e:a4:8b:73:fc:b8
Signer

Actual PE Digest

1d:57:cb:52:be:34:8e:9b:f0:e9:6c:f8:e2:d5:9e:a4:8b:73:fc:b8

Digest Algorithm

sha1

PE Digest Matches

true

Headers

DLL Characteristics

IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
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

PDB Paths

D:\Projects\WinRAR\rar\build\rar64\Release\RAR.pdb

Imports

kernel32

GetCurrentProcess
DeviceIoControl
FindClose
SetFileTime
CloseHandle
BackupRead
BackupSeek
CreateDirectoryW
RemoveDirectoryW
CreateFileW
DeleteFileW
FindFirstFileW
CreateHardLinkW
GetShortPathNameW
GetLongPathNameW
MoveFileW
ReadFile
FlushFileBuffers
SetEndOfFile
SetFilePointer
GetFileTime
GetCurrentProcessId
GetDriveTypeW
GetDiskFreeSpaceExW
SetFileAttributesW
GetFileAttributesW
GetVolumeInformationW
ExpandEnvironmentStringsW
FindNextFileW
GetVersionExW
GetModuleFileNameW
GetCurrentDirectoryW
GetFullPathNameW
FoldStringW
SetErrorMode
FreeLibrary
LoadLibraryW
LoadLibraryExW
CompareStringA
GetCurrentThread
SetThreadPriority
SetThreadExecutionState
SetConsoleCtrlHandler
GetSystemDirectoryW
SetCurrentDirectoryW
GetFullPathNameA
SetPriorityClass
GetProcessAffinityMask
CreateThread
InitializeCriticalSection
EnterCriticalSection
LeaveCriticalSection
DeleteCriticalSection
SetEvent
ResetEvent
ReleaseSemaphore
WaitForSingleObject
CreateSemaphoreW
GetSystemTime
SystemTimeToTzSpecificLocalTime
TzSpecificLocalTimeToSystemTime
SystemTimeToFileTime
FileTimeToLocalFileTime
LocalFileTimeToFileTime
FileTimeToSystemTime
GetCPInfo
IsDBCSLeadByte
MultiByteToWideChar
WideCharToMultiByte
CompareStringW
SetFilePointerEx
GetProcessHeap
HeapSize
SetEnvironmentVariableA
FreeEnvironmentStringsW
GetEnvironmentStringsW
GetOEMCP
IsValidCodePage
FindNextFileA
FindFirstFileExA
FormatMessageW
Sleep
GetLastError
WriteConsoleW
ReadConsoleW
SetConsoleMode
GetConsoleMode
WriteFile
GetStdHandle
GetFileType
GetCommandLineW
GetModuleHandleW
GetProcAddress
GetFileInformationByHandle
CreateEventW
SetLastError
SetStdHandle
GetConsoleCP
LCMapStringW
RtlCaptureContext
RtlLookupFunctionEntry
RtlVirtualUnwind
UnhandledExceptionFilter
SetUnhandledExceptionFilter
TerminateProcess
IsProcessorFeaturePresent
WaitForSingleObjectEx
IsDebuggerPresent
GetStartupInfoW
QueryPerformanceCounter
GetCurrentThreadId
GetSystemTimeAsFileTime
InitializeSListHead
RtlPcToFileHeader
RaiseException
RtlUnwindEx
EncodePointer
InitializeCriticalSectionAndSpinCount
TlsAlloc
TlsGetValue
TlsSetValue
TlsFree
ExitProcess
GetModuleHandleExW
QueryPerformanceFrequency
GetModuleFileNameA
GetCommandLineA
GetACP
HeapFree
HeapAlloc
HeapReAlloc
GetStringTypeW

user32

CharLowerW
CharUpperW
MessageBeep
ExitWindowsEx
LoadStringW
OemToCharBuffW
CharToOemBuffA
OemToCharBuffA
OemToCharA
CharToOemA
CharToOemBuffW

advapi32

FreeSid
AllocateAndInitializeSid
RegQueryValueExW
RegOpenKeyExW
RegCloseKey
LookupPrivilegeValueW
GetFileSecurityW
SetFileSecurityW
GetSecurityDescriptorLength
AdjustTokenPrivileges
OpenProcessToken
CryptGenRandom
CryptReleaseContext
CryptAcquireContextW
CheckTokenMembership

shell32

SHGetSpecialFolderLocation
SHGetPathFromIDListW
SHGetMalloc
SHFileOperationW

powrprof

SetSuspendState

Sections

.text
Size: 443KB - Virtual size: 442KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.rdata
Size: 92KB - Virtual size: 92KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.data
Size: 12KB - Virtual size: 124KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.pdata
Size: 17KB - Virtual size: 17KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.tls
Size: 512B - Virtual size: 9B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 30KB - Virtual size: 30KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.reloc
Size: 2KB - Virtual size: 2KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
skochgrabber-main/Components/rarreg.key
skochgrabber-main/Components/requirements.txt
skochgrabber-main/Components/run.bat
.bat .vbs
skochgrabber-main/Components/sigthief.py
.py .sh linux
skochgrabber-main/Components/stub.py
skochgrabber-main/Components/upx.exe
.exe windows:4 windows x64 arch:x64

Headers

File Characteristics

IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DEBUG_STRIPPED

Sections

UPX0
Size: - Virtual size: 1.5MB

IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

UPX1
Size: 522KB - Virtual size: 524KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 2KB - Virtual size: 4KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
out.upx
.exe windows:4 windows x64 arch:x64

Headers

File Characteristics

IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DEBUG_STRIPPED

Sections

.text
Size: 850KB - Virtual size: 849KB

IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ

.data
Size: 3KB - Virtual size: 2KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rdata
Size: 1.1MB - Virtual size: 1.1MB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.pdata
Size: 34KB - Virtual size: 33KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.xdata
Size: 35KB - Virtual size: 35KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ

.bss
Size: - Virtual size: 12KB

IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.idata
Size: 6KB - Virtual size: 5KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.CRT
Size: 512B - Virtual size: 112B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.tls
Size: 512B - Virtual size: 16B

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE

.rsrc
Size: 1KB - Virtual size: 1KB

IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
skochgrabber-main/Components/version.txt
skochgrabber-main/Extras/icon.ico
skochgrabber-main/Extras/unblock_sites.py
skochgrabber-main/README.md
skochgrabber-main/READme.txt
skochgrabber-main/gui.py

Sharing

General

Malware Config

Signatures

Files

9a33888e10929c185d02249d2b55c15a

Code Sign

7e:93:eb:fb:7c:c6:4e:59:ea:4b:9a:77:d4:06:fc:3bCertificate

Extended Key Usages

Key Usages

0e:cf:f4:38:c8:fe:bf:35:6e:04:d8:6a:98:1b:1a:50Certificate

Extended Key Usages

Key Usages

76:25:a5:9e:a4:0a:7e:7b:91:3f:91:07:23:32:8e:26Certificate

Extended Key Usages

Key Usages

39:72:44:3a:f9:22:b7:51:d7:d3:6c:10:dd:31:35:95Certificate

Key Usages

1d:a2:48:30:6f:9b:26:18:d0:82:e0:96:7d:33:d3:6aCertificate

Extended Key Usages

Key Usages

76:25:a5:9e:a4:0a:7e:7b:91:3f:91:07:23:32:8e:26Certificate

Extended Key Usages

Key Usages

39:72:44:3a:f9:22:b7:51:d7:d3:6c:10:dd:31:35:95Certificate

Key Usages

1d:a2:48:30:6f:9b:26:18:d0:82:e0:96:7d:33:d3:6aCertificate

Extended Key Usages

Key Usages

7b:05:b1:d4:49:68:51:44:f7:c9:89:d2:9c:19:9d:12Certificate

Extended Key Usages

Key Usages

7b:d4:e5:af:ba:cc:07:3f:a1:01:23:04:22:41:4d:12Certificate

Extended Key Usages

Key Usages

9c:66:96:14:0c:f3:61:be:84:1b:0f:4b:ea:3c:ad:de:9c:7d:83:fc:e4:45:63:45:74:6c:06:37:d3:d6:f1:16Signer

1d:57:cb:52:be:34:8e:9b:f0:e9:6c:f8:e2:d5:9e:a4:8b:73:fc:b8Signer

Headers

DLL Characteristics

File Characteristics

PDB Paths

Imports

kernel32

user32

advapi32

shell32

powrprof

Sections

.text Size: 443KB - Virtual size: 442KB

.rdata Size: 92KB - Virtual size: 92KB

.data Size: 12KB - Virtual size: 124KB

.pdata Size: 17KB - Virtual size: 17KB

.tls Size: 512B - Virtual size: 9B

.rsrc Size: 30KB - Virtual size: 30KB

.reloc Size: 2KB - Virtual size: 2KB

Headers

File Characteristics

Sections

UPX0 Size: - Virtual size: 1.5MB

UPX1 Size: 522KB - Virtual size: 524KB

.rsrc Size: 2KB - Virtual size: 4KB

Headers

File Characteristics

Sections

.text Size: 850KB - Virtual size: 849KB

.data Size: 3KB - Virtual size: 2KB

.rdata Size: 1.1MB - Virtual size: 1.1MB

.pdata Size: 34KB - Virtual size: 33KB

.xdata Size: 35KB - Virtual size: 35KB

.bss Size: - Virtual size: 12KB

.idata Size: 6KB - Virtual size: 5KB

.CRT Size: 512B - Virtual size: 112B

.tls Size: 512B - Virtual size: 16B

.rsrc Size: 1KB - Virtual size: 1KB

7e:93:eb:fb:7c:c6:4e:59:ea:4b:9a:77:d4:06:fc:3b
Certificate

0e:cf:f4:38:c8:fe:bf:35:6e:04:d8:6a:98:1b:1a:50
Certificate

76:25:a5:9e:a4:0a:7e:7b:91:3f:91:07:23:32:8e:26
Certificate

39:72:44:3a:f9:22:b7:51:d7:d3:6c:10:dd:31:35:95
Certificate

1d:a2:48:30:6f:9b:26:18:d0:82:e0:96:7d:33:d3:6a
Certificate

76:25:a5:9e:a4:0a:7e:7b:91:3f:91:07:23:32:8e:26
Certificate

39:72:44:3a:f9:22:b7:51:d7:d3:6c:10:dd:31:35:95
Certificate

1d:a2:48:30:6f:9b:26:18:d0:82:e0:96:7d:33:d3:6a
Certificate

7b:05:b1:d4:49:68:51:44:f7:c9:89:d2:9c:19:9d:12
Certificate

7b:d4:e5:af:ba:cc:07:3f:a1:01:23:04:22:41:4d:12
Certificate

9c:66:96:14:0c:f3:61:be:84:1b:0f:4b:ea:3c:ad:de:9c:7d:83:fc:e4:45:63:45:74:6c:06:37:d3:d6:f1:16
Signer

1d:57:cb:52:be:34:8e:9b:f0:e9:6c:f8:e2:d5:9e:a4:8b:73:fc:b8
Signer

.text
Size: 443KB - Virtual size: 442KB

.rdata
Size: 92KB - Virtual size: 92KB

.data
Size: 12KB - Virtual size: 124KB

.pdata
Size: 17KB - Virtual size: 17KB

.tls
Size: 512B - Virtual size: 9B

.rsrc
Size: 30KB - Virtual size: 30KB

.reloc
Size: 2KB - Virtual size: 2KB

UPX0
Size: - Virtual size: 1.5MB

UPX1
Size: 522KB - Virtual size: 524KB

.rsrc
Size: 2KB - Virtual size: 4KB

.text
Size: 850KB - Virtual size: 849KB

.data
Size: 3KB - Virtual size: 2KB

.rdata
Size: 1.1MB - Virtual size: 1.1MB

.pdata
Size: 34KB - Virtual size: 33KB

.xdata
Size: 35KB - Virtual size: 35KB

.bss
Size: - Virtual size: 12KB

.idata
Size: 6KB - Virtual size: 5KB

.CRT
Size: 512B - Virtual size: 112B

.tls
Size: 512B - Virtual size: 16B

.rsrc
Size: 1KB - Virtual size: 1KB