General
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Target
CrxckrInstaller.exe
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Size
296KB
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MD5
dc1210b8ce592d38a6e6bbaac8d3f64c
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SHA1
8b6ad187ee837db5e924a972943355ed1c82cb7d
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SHA256
63a623df9e58f6705946b5473ab20fdad8dcdd93800b7ca8351fae0bf5c635ce
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SHA512
c07c5f4543eb59282333f19c29b6eaaa76f003cb38da03969b7d73b0755619150d0d2b0b5c4bfdd045806e6cf54652ee10262b6aa465bc95b65735cce5ef176d
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SSDEEP
6144:NloZM+rIkd8g+EtXHkv/iD4Ev9KiAfboixUyzzqtmb8e1mhi:PoZtL+EP8Ev9KiAfboixUyzzqov
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1213210102572515388/dWKjkB5GPb65xfJC99dCVsj3axOYTwZESuaf6k4uSE96uksJNfTHvt4uGxoK8BBhZLyJ
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 CrxckrInstaller.exe
Files
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CrxckrInstaller.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: 227KB - Virtual size: 226KB
IMAGE_SCN_CNT_CODE
IMAGE_SCN_MEM_EXECUTE
IMAGE_SCN_MEM_READ
.rsrc Size: 68KB - Virtual size: 67KB
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