Behavioral task
behavioral1
Sample
Optimization_Pc_Twea.exe
Resource
win7-20240729-en
Behavioral task
behavioral2
Sample
Optimization_Pc_Twea.exe
Resource
win10v2004-20240802-en
General
-
Target
Optimization_Pc_Twea.exe
-
Size
240KB
-
MD5
3ab1d460b16ec34493d9d769729a53fc
-
SHA1
e7e379fb8d8390103e53c31f07a52dbd1bc796a1
-
SHA256
3d33b7e8a8541de77e1428e6998cf1d77e1e3c7121ff42bb92285614db513bc9
-
SHA512
37d59d665ed891832e3e8efd6b74116bb51230a69b1c5fff53e2aaf8eaaade4d807215dae3bbd26ec5812f8bae55f2d982e975d38c0d6ce684b5b2cea93f2949
-
SSDEEP
6144:vloZMNrIkd8g+EtXHkv/iD4lx4+Clg8e1mbTi:NoZmL+EP8DMwK+
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1277937947240304723/e6aSIKSZZUhEGqX-EkfVX3BFZe9q4cDzASzi5ZjH0SMC7YexS-B3SgsSoakwIqMdOrMu
Signatures
-
Detect Umbral payload 1 IoCs
resource yara_rule sample family_umbral -
Umbral family
-
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.
resource Optimization_Pc_Twea.exe
Files
-
Optimization_Pc_Twea.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: 11KB - Virtual size: 10KB
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