Behavioral task
behavioral1
Sample
MemCheckRc7.exe
Resource
win7-20230712-en
General
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Target
MemCheckRc7.exe
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Size
227KB
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MD5
ce368bd6492ca074696e36eb8faed831
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SHA1
c0cc7d66fb33d6582aac9f0c13210268fb8b3942
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SHA256
4b088d7a956ee6a1a11987fd7e1205265ad86925e8b5463c8e9b733f6af527e0
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SHA512
58d3f38b4a77c20d17dcf2a90cc31772cc3ffed78aa6081e1382c5ad510c3af5e4a18745d04566193566c003e28449589dde5f472bc3e0872a0a3f4588fcd41b
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SSDEEP
6144:+loZM+rIkd8g+EtXHkv/iD4mm8UCg/7IQR0STTKuUb8e1m9i:ooZtL+EP8mm8UCg/7IQR0STTKPP
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1120043770751230052/-5johddh8bRbqKkvKnbv0JfJSuDSY1H5Vi0eaNyh9JyOYgBRA4t6Fqya6MN6m-6FOaSO
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 MemCheckRc7.exe
Files
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MemCheckRc7.exe.exe windows x86
Password: jkbjkh
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: 224KB - Virtual size: 224KB
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