Overview
overview
10Static
static
10Kurome.Bui...er.exe
windows10-2004-x64
1Kurome.Bui...db.dll
windows10-2004-x64
1Kurome.Bui...db.dll
windows10-2004-x64
1Kurome.Bui...ks.dll
windows10-2004-x64
1Kurome.Bui...il.dll
windows10-2004-x64
1Kurome.Bui...ld.exe
windows10-2004-x64
10Kurome.Bui...ub.exe
windows10-2004-x64
10Behavioral task
behavioral1
Sample
Kurome.Builder/Kurome.Builder.exe
Resource
win10v2004-20230220-en
Behavioral task
behavioral2
Sample
Kurome.Builder/Mono.Cecil.Mdb.dll
Resource
win10v2004-20230220-en
Behavioral task
behavioral3
Sample
Kurome.Builder/Mono.Cecil.Pdb.dll
Resource
win10v2004-20230220-en
Behavioral task
behavioral4
Sample
Kurome.Builder/Mono.Cecil.Rocks.dll
Resource
win10v2004-20230221-en
Behavioral task
behavioral5
Sample
Kurome.Builder/Mono.Cecil.dll
Resource
win10v2004-20230220-en
Behavioral task
behavioral6
Sample
Kurome.Builder/build.exe
Resource
win10v2004-20230220-en
Behavioral task
behavioral7
Sample
Kurome.Builder/stub.exe
Resource
win10v2004-20230220-en
General
-
Target
Kurome.Builder.zip
-
Size
492KB
-
MD5
5a177de4f90e834b20ed4d0df91ef784
-
SHA1
ca63b1477b07f02d679cd2386586de9f4563eaa2
-
SHA256
8c01c6d9cdc82805e9bc47f71404615498d3623c078657c4cf494500a20db845
-
SHA512
04004e35afcdd3b69ff006cd576a75a02a71d8fc0a8b0a68b4ef1738c8400e494c73be59113719424e7e075ba76fc055dba2c1da856a4b8a00e5db1ee7841508
-
SSDEEP
12288:J0n9KUxmWWGlVF8ELMlRgytbBQaUM7Z50F3fhsvUb14Kc2IaJqYVBgpmg6h:+cUcDY2wMHgytFDYdhsvUWvU9VO6h
Malware Config
Extracted
redline
cheat
194.145.138.85:28105
Signatures
-
RedLine payload 2 IoCs
resource yara_rule static1/unpack001/Kurome.Builder/build.exe family_redline static1/unpack001/Kurome.Builder/stub.dll family_redline -
Redline family
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SectopRAT payload 2 IoCs
resource yara_rule static1/unpack001/Kurome.Builder/build.exe family_sectoprat static1/unpack001/Kurome.Builder/stub.dll family_sectoprat -
Sectoprat family
Files
-
Kurome.Builder.zip.zip
-
Kurome.Builder/Kurome.Builder.exe.exe windows x86
f34d5f2d4577ed6d9ceec516c1f5a744
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
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_32BIT_MACHINE
Imports
mscoree
_CorExeMain
Sections
.text Size: 135KB - Virtual size: 134KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 1KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 512B - Virtual size: 12B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
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Kurome.Builder/Kurome.Builder.exe.config
-
Kurome.Builder/Kurome.Builder.pdb
-
Kurome.Builder/Mono.Cecil.Mdb.dll.dll windows x86
dae02f32a21e03ce65412f6e56942daa
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
Imports
mscoree
_CorDllMain
Sections
.text Size: 40KB - Virtual size: 39KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 1024B - Virtual size: 864B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 512B - Virtual size: 12B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
-
Kurome.Builder/Mono.Cecil.Mdb.pdb
-
Kurome.Builder/Mono.Cecil.Pdb.dll.dll windows x86
dae02f32a21e03ce65412f6e56942daa
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
Imports
mscoree
_CorDllMain
Sections
.text Size: 85KB - Virtual size: 85KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 1024B - Virtual size: 864B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 512B - Virtual size: 12B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
-
Kurome.Builder/Mono.Cecil.Pdb.pdb
-
Kurome.Builder/Mono.Cecil.Rocks.dll.dll windows x86
dae02f32a21e03ce65412f6e56942daa
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
Imports
mscoree
_CorDllMain
Sections
.text Size: 25KB - Virtual size: 24KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 1024B - Virtual size: 876B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 512B - Virtual size: 12B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
-
Kurome.Builder/Mono.Cecil.Rocks.pdb
-
Kurome.Builder/Mono.Cecil.dll.dll windows x86
dae02f32a21e03ce65412f6e56942daa
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LARGE_ADDRESS_AWARE
Imports
mscoree
_CorDllMain
Sections
.text Size: 348KB - Virtual size: 347KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 1024B - Virtual size: 840B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 512B - Virtual size: 12B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
-
Kurome.Builder/Mono.Cecil.pdb
-
Kurome.Builder/build.exe.exe windows x86
f34d5f2d4577ed6d9ceec516c1f5a744
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
Imports
mscoree
_CorExeMain
Sections
.text Size: 93KB - Virtual size: 92KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 1KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 512B - Virtual size: 12B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ
-
Kurome.Builder/stub.dll.exe windows x86
f34d5f2d4577ed6d9ceec516c1f5a744
Headers
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE
IMAGE_DLLCHARACTERISTICS_NX_COMPAT
IMAGE_DLLCHARACTERISTICS_NO_SEH
IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_32BIT_MACHINE
Imports
mscoree
_CorExeMain
Sections
.text Size: 93KB - Virtual size: 93KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 1KB - Virtual size: 1KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 512B - Virtual size: 12B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_DISCARDABLE
IMAGE_SCN_MEM_READ