Behavioral task
behavioral1
Sample
LETTER.SCR.exe
Resource
win7-20240704-en
Behavioral task
behavioral2
Sample
LETTER.SCR.exe
Resource
win10v2004-20240709-en
General
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Target
LETTER.SCR.exe
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Size
29KB
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MD5
931c4b1cc972c8b8b260cf3625bd0f9d
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SHA1
d3075323257c30a00a4eaaf5fd1e081280d82225
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SHA256
fff81cc8b1c1277ff1f6bc5b3a0c9a1c997e7048b2feed7c6e053da0e3f5686a
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SHA512
d85dee0a3ad833ddbbb15cfc0f21b98847389a49ba8f264d6ee5d3b1f9b292230864a65af14a5e1763af50d387b9f5927cbc0c2c5d26b7931d42e79e7b459453
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SSDEEP
768:AEwHupU99d2JE0jNJJ83+8zzqgTdVY9/BZ:AEwVs+0jNDY1qi/qn
Malware Config
Signatures
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resource yara_rule sample upx -
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource LETTER.SCR.exe
Files
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LETTER.SCR.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: 32KB
IMAGE_SCN_CNT_UNINITIALIZED_DATA
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE
UPX1 Size: 24KB - Virtual size: 24KB
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
.text Size: 512B - Virtual size: 511B
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
IMAGE_SCN_MEM_WRITE