General
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Target
mw3loader.exe
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Size
229KB
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MD5
a31efc937dcb33a570c243ef7be4423f
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SHA1
ef838ad887d34664d97f9c0c6e7b728daac897a2
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SHA256
801455f1721ad65f4d62e40d9d4d05f5a1b520e569b05a7e8daf1c7be86fac6d
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SHA512
0d2552a3af17c9ec4dd17b895a28eeb9a99ec0af3d4826825f04a4358a137c12a45efe213919237c0ec0a80e284578d4eeef0e97b650a4b6b2930ba42ee7b611
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SSDEEP
6144:lloZM+rIkd8g+EtXHkv/iD4XGI9ecjfUY1gevPe2jb8e1mnesi:noZtL+EP8XGI9ecjfUY1gevPewX
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1225939299975823531/hi0KA2iXCI7FLYDopNjuDcU-fNzEE5HRr3DcqtzH_qLfrS6w9VE06rGOJ_zaplYx7d5X
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 mw3loader.exe
Files
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mw3loader.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: 1KB - Virtual size: 1KB
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