Behavioral task
behavioral1
Sample
bkfaf34.exe
Resource
win7-20240729-en
General
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Target
bkfaf34.exe
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Size
231KB
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MD5
447297048bf59e02973e2a92506bcf82
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SHA1
2ed1aca8f40418d12f99675157b89e1d2d26ebb0
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SHA256
bb7252177d00b2242b820310ffe3b45f31ee666d85cd6b521f93566c3edc27cc
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SHA512
34c14cfb4baeab9bc45445f4167c90d1c362df04ab185a69676088011dfb3f9f78e951ece9986f42fb6ec6d31f22f7dc012d2ccbf8cf02ef0261c8aa698eaf76
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SSDEEP
6144:RloZM+rIkd8g+EtXHkv/iD4VDTfGELns8d42X3Wo1b8e1mOi:joZtL+EP8VDTfGELns8d42X3Wk0
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1266849412760731869/Sdaf58eEAN8FusOdQ213bDIrAchOhjmFy_eDf8BG2aDRnXHmtcGPiw0sTqKLC0eJ7Pf_
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 bkfaf34.exe
Files
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bkfaf34.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: 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