Behavioral task
behavioral1
Sample
encryptfilesworking.exe
Resource
win7-20240221-en
General
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Target
4b1df2574afb076cca6d25ab81c5b93a_JaffaCakes118
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Size
38KB
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MD5
4b1df2574afb076cca6d25ab81c5b93a
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SHA1
e3c105b5c0f68ce3b447ffb99301346bd1dfa9a7
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SHA256
017ceac0471f4067f103565500963b081f63f89ffe66050770e73f91014b645a
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SHA512
5d6348cfbf9834ae87a3eb83c8e9c2278fd3b91f11658136c07f973a397c19a4f603c33459b82992ab1ea7f1b12e9a70337d223c16170dae6aaf05e50672ad8c
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SSDEEP
768:bsZSGCOvdLpO7Xsf2jE40zd4uQsBSnNzBDLvzsb9VvoDWpt:+nCD7Wzd4ufBSN1DTYb9Bzpt
Malware Config
Signatures
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resource yara_rule static1/unpack001/encryptfilesworking.exe upx -
Unsigned PE 2 IoCs
Checks for missing Authenticode signature.
resource unpack001/encryptfilesworking.exe unpack002/out.upx
Files
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4b1df2574afb076cca6d25ab81c5b93a_JaffaCakes118.rar
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encryptfilesworking.exe.exe windows:1 windows x86 arch:x86
Headers
File Characteristics
IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_BYTES_REVERSED_LO
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_BYTES_REVERSED_HI
Sections
UPX0 Size: - Virtual size: 104KB
IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
UPX1 Size: 37KB - Virtual size: 40KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 5KB - Virtual size: 8KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
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out.upx.exe windows:1 windows x86 arch:x86
Headers
File Characteristics
IMAGE_FILE_RELOCS_STRIPPED
IMAGE_FILE_EXECUTABLE_IMAGE
IMAGE_FILE_LINE_NUMS_STRIPPED
IMAGE_FILE_LOCAL_SYMS_STRIPPED
IMAGE_FILE_BYTES_REVERSED_LO
IMAGE_FILE_32BIT_MACHINE
IMAGE_FILE_BYTES_REVERSED_HI
Sections
CODE Size: 102KB - Virtual size: 101KB
IMAGE_SCN_CNT_CODE
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
BSS Size: - Virtual size: 1KB
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.idata Size: 4KB - Virtual size: 3KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.tls Size: - Virtual size: 8B
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rdata Size: 512B - Virtual size: 24B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.reloc Size: 3KB - Virtual size: 3KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.rsrc Size: 5KB - Virtual size: 5KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ