General
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Target
Steam.exe
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Size
495KB
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MD5
0f305065fcccc8be8253a197ee3e0a88
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SHA1
94696b4a7bfc72206005ff40b1a216a3b88786e8
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SHA256
8b43255477dbd9e15699b4d6c42f63c945e6be86ef52ef59c4e86252629bc118
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SHA512
3d0276508da2ed3d2abbda7aca20c6523979d878bddb5b4a638edc28063c41de6c0300d59c6f62347150ee8add382d8dfd2a2d97bd041b3b24159536cb5f2468
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SSDEEP
6144:XloZMLrIkd8g+EtXHkv/iD4xq2ElTwk79iTlwsJzMb8e1m4Kit+GIIIIIIIhIII0:1oZ0L+EP8xq2ElTwk79iTlwsJQ1vG
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1209346194699067515/p73q3Ip7wSey2bwNRuEfLLtM3LrGZEacFIWDNDvhYTWJzGs9Zlg9a874jyDG3_9v_tPV
Signatures
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Detect Umbral payload 1 IoCs
resource yara_rule sample family_umbral -
Umbral family
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Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource Steam.exe
Files
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Steam.exe.exe windows:4 windows x86 arch: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_LARGE_ADDRESS_AWARE
IMAGE_FILE_32BIT_MACHINE
Imports
mscoree
_CorExeMain
Sections
.text Size: 228KB - Virtual size: 228KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 266KB - Virtual size: 265KB
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