Behavioral task
behavioral1
Sample
upx.exe
Resource
win7-20240705-en
General
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Target
ad8d0e8a36d29ec98d11d50b6a52c376_JaffaCakes118
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Size
114KB
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MD5
ad8d0e8a36d29ec98d11d50b6a52c376
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SHA1
a2593f15518e77de123a1ee1641132cd7dcbf32c
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SHA256
1b7a58ea8815bb36bf51ecc47bdd18b7cb568f6d82c79764be55f93e50d71f41
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SHA512
3e20c5743d8e6dd14339c29db8d732160c764e5b60e9579a5c2bfd0bacaa2002897a2f3d6c40558db12ff4602277cc31409ee34463a8203bc64f8bd3ecbe3c35
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SSDEEP
3072:6WDDtug7PVXOzvRm/KBbzYKpxzKcHzAhF:x1lbVOmSBbzYA+cTu
Malware Config
Signatures
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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 -
resource yara_rule static1/unpack001/upx.exe upx -
Unsigned PE 2 IoCs
Checks for missing Authenticode signature.
resource unpack001/upx.exe unpack002/out.upx
Files
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ad8d0e8a36d29ec98d11d50b6a52c376_JaffaCakes118.zip
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Images/_dumb-ass.bmp
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Images/_fbi.bmp
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Images/_fucked.bmp
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Images/_hacked.bmp
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Images/_hacked2.bmp
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Images/_hdkp.bmp
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Images/_hello.bmp
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Images/_netdevil.bmp
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Images/_normal.bmp
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Images/_stop.bmp
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Images/_sup.bmp
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ReadMe.txt
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Warning.txt
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icons.icl
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upx.exe.exe windows:4 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_32BIT_MACHINE
Sections
UPX0 Size: - Virtual size: 116KB
IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
UPX1 Size: 85KB - Virtual size: 88KB
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:4 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_32BIT_MACHINE
Sections
.text Size: 124KB - Virtual size: 123KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rdata Size: 60KB - Virtual size: 59KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
.data Size: 4KB - Virtual size: 5KB
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
.rsrc Size: 4KB - Virtual size: 840B
IMAGE_SCN_CNT_INITIALIZED_DATA
IMAGE_SCN_MEM_READ