Overview
overview
7Static
static
7greko-10.2...oid-ja
debian-9-armhf
1greko-10.2...-32-ja
ubuntu-18.04-amd64
1greko-10.2...-64-ja
ubuntu-18.04-amd64
1greko-10.2...ja.exe
windows7-x64
1greko-10.2...ja.exe
windows10-2004-x64
1greko-10.2...ja.exe
windows7-x64
1greko-10.2...ja.exe
windows10-2004-x64
1greko-10.2...ja.exe
windows7-x64
7greko-10.2...ja.exe
windows10-2004-x64
7Behavioral task
behavioral1
Sample
greko-10.2-ja/Android (run as xboard engine)/GreKo-102-android-ja
Resource
debian9-armhf-20231222-en
Behavioral task
behavioral2
Sample
greko-10.2-ja/Linux/GreKo-102-32-ja
Resource
ubuntu1804-amd64-20231215-en
Behavioral task
behavioral3
Sample
greko-10.2-ja/Linux/GreKo-102-64-ja
Resource
ubuntu1804-amd64-20231215-en
Behavioral task
behavioral4
Sample
greko-10.2-ja/Windows/GreKo-102-64-ja.exe
Resource
win7-20231215-en
Behavioral task
behavioral5
Sample
greko-10.2-ja/Windows/GreKo-102-64-ja.exe
Resource
win10v2004-20231215-en
Behavioral task
behavioral6
Sample
greko-10.2-ja/Windows/GreKo-102-64-pop-ja.exe
Resource
win7-20231215-en
Behavioral task
behavioral7
Sample
greko-10.2-ja/Windows/GreKo-102-64-pop-ja.exe
Resource
win10v2004-20231215-en
Behavioral task
behavioral8
Sample
greko-10.2-ja/Windows/Greko-102-32-ja.exe
Resource
win7-20231215-en
Behavioral task
behavioral9
Sample
greko-10.2-ja/Windows/Greko-102-32-ja.exe
Resource
win10v2004-20231215-en
General
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Target
8859902ee46d4372a8fc63e199dc4ab9
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Size
2.7MB
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MD5
8859902ee46d4372a8fc63e199dc4ab9
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SHA1
e0868ce6a9293cd5596304e463947bcd0ae1e566
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SHA256
b905368a3f6b2525378fc32ed5858233490eb020d103b9a9c126424218828935
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SHA512
d0f3c35db243be9d59fa6dcf78aba3f0cf739ae10856dff15d588d0ef440aa11d3c98aefaff758eec7b97a6ef8384888167ea66fbab984aa57cde7750c2671fe
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SSDEEP
49152:9jK41Nt+9MOVayll7iiMfB/I4ZEckZWKhTbaxgkwXCMElKG7FskOmjy2p+k6fEO4:NK41X+9M+vcN5x7KhTbTPElKS0mjyEBl
Malware Config
Signatures
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resource yara_rule static1/unpack001/greko-10.2-ja/Android (run as xboard engine)/GreKo-102-android-ja upx static1/unpack001/greko-10.2-ja/Linux/GreKo-102-32-ja upx static1/unpack001/greko-10.2-ja/Linux/GreKo-102-64-ja upx static1/unpack001/greko-10.2-ja/Windows/Greko-102-32-ja.exe upx -
Unsigned PE 4 IoCs
Checks for missing Authenticode signature.
resource unpack001/greko-10.2-ja/Windows/GreKo-102-64-ja.exe unpack001/greko-10.2-ja/Windows/GreKo-102-64-pop-ja.exe unpack001/greko-10.2-ja/Windows/Greko-102-32-ja.exe unpack002/out.upx
Files
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8859902ee46d4372a8fc63e199dc4ab9.zip
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greko-10.2-ja/Android (run as xboard engine)/GreKo-102-android-ja.elf linux arm
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greko-10.2-ja/Book/book.bin
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greko-10.2-ja/Linux/GreKo-102-32-ja.elf linux x86
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greko-10.2-ja/Linux/GreKo-102-64-ja.elf linux x64
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greko-10.2-ja/Linux/GreKo.ini
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greko-10.2-ja/Linux/book.bin
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greko-10.2-ja/Logos/Thumbs.db
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greko-10.2-ja/Logos/greko_100x50.gif
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greko-10.2-ja/Logos/greko_130x65.gif
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greko-10.2-ja/Src/src/GreKo.sln
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greko-10.2-ja/Src/src/GreKo.vcproj.xml
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greko-10.2-ja/Src/src/Makefile
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greko-10.2-ja/Src/src/Makefile.linux
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greko-10.2-ja/Src/src/bitboards.cpp
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greko-10.2-ja/Src/src/bitboards.h
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greko-10.2-ja/Src/src/book.cpp
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greko-10.2-ja/Src/src/book.h
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greko-10.2-ja/Src/src/config.h
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greko-10.2-ja/Src/src/defaults.h
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greko-10.2-ja/Src/src/eval.cpp
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greko-10.2-ja/Src/src/eval.h
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greko-10.2-ja/Src/src/main.cpp
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greko-10.2-ja/Src/src/moves.cpp
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greko-10.2-ja/Src/src/moves.h
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greko-10.2-ja/Src/src/notation.cpp
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greko-10.2-ja/Src/src/notation.h
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greko-10.2-ja/Src/src/position.cpp
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greko-10.2-ja/Src/src/position.h
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greko-10.2-ja/Src/src/search.cpp
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greko-10.2-ja/Src/src/search.h
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greko-10.2-ja/Src/src/types.h
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greko-10.2-ja/Src/src/unix.cpp
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greko-10.2-ja/Src/src/utils.cpp
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greko-10.2-ja/Src/src/utils.h
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greko-10.2-ja/Src/src/win32.cpp
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greko-10.2-ja/Thumbs.db
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greko-10.2-ja/Windows/GreKo-102-64-ja.exe.exe windows:5 windows x64 arch:x64
cc861723d81c3d0282bd2595327117c3
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DEBUG_STRIPPED
Imports
user32
MessageBoxA
comctl32
InitCommonControls
kernel32
LoadLibraryA
GetProcAddress
VirtualAlloc
VirtualFree
Sections
.text Size: 134KB - Virtual size: 268KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 39KB - Virtual size: 84KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 2KB - Virtual size: 1024KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 6KB - Virtual size: 12KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data1 Size: 2KB - Virtual size: 12KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.trace Size: 3KB - Virtual size: 8KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 2KB - Virtual size: 8KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
.x64 Size: 6KB - Virtual size: 8KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
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greko-10.2-ja/Windows/GreKo-102-64-pop-ja.exe.exe windows:5 windows x64 arch:x64
cc861723d81c3d0282bd2595327117c3
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_LARGE_ADDRESS_AWARE
IMAGE_FILE_DEBUG_STRIPPED
Imports
user32
MessageBoxA
comctl32
InitCommonControls
kernel32
LoadLibraryA
GetProcAddress
VirtualAlloc
VirtualFree
Sections
.text Size: 133KB - Virtual size: 268KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 39KB - Virtual size: 84KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 2KB - Virtual size: 1024KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.pdata Size: 6KB - Virtual size: 12KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data1 Size: 2KB - Virtual size: 12KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.trace Size: 3KB - Virtual size: 8KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 2KB - Virtual size: 8KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
.x64 Size: 6KB - Virtual size: 8KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
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greko-10.2-ja/Windows/GreKo.ini
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greko-10.2-ja/Windows/Greko-102-32-ja.exe.exe windows:5 windows x86 arch:x86
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DEBUG_STRIPPED
Sections
UPX0 Size: - Virtual size: 1.1MB
IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
UPX1 Size: 102KB - Virtual size: 104KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 1024B - Virtual size: 4KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
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out.upx.exe windows:5 windows x86 arch:x86
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_DEBUG_STRIPPED
Sections
.text Size: 151KB - Virtual size: 151KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 40KB - Virtual size: 39KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 5KB - Virtual size: 1010KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 512B - Virtual size: 436B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.reloc Size: 14KB - Virtual size: 13KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
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greko-10.2-ja/Windows/book.bin
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greko-10.2-ja/history.txt
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greko-10.2-ja/logo.bmp