umbral | Venomer-Rat[.]exe | Triage

Sharing

General

Target

Venomer-Rat.exe
Size

235KB
MD5

5a410c6eeda88a58fc797ae80849ef9a
SHA1

433f6296aa36bee061dbfb43ba23d7ea41471728
SHA256

0506a1b19dc8f17889113566ad1888b13f0aa9e956b8de39a5e55c36cd268b9a
SHA512

e8a257b05492b5fa20bbf3d742b28e200bf103490bbb075176281a6e4ddb085a9b994f0b6ef7e0fed1d0cfe27830de55ec736f5956d1991494c85217792b2c8f
SSDEEP

6144:jloZM+rIkd8g+EtXHkv/iD49T0o+fVeGJ8MFXSy3gwb8e1m+sVi:BoZtL+EP89T0o+fVeGJ8MFXSy3dBn

Score

10^/10

umbral

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1241353300989706280/xEu_s1RAd1ZFu4H4ksT_E87iVJTrp7nSQCwn9nMQijz6QMq5oy0AQ9x0rXFcEmSLksxr

Signatures

Detect Umbral payload 1 IoCs

Processes:

resource yara_rule

sample family_umbral
Umbral family
umbral
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.

Processes:

resource

Venomer-Rat.exe

Files

Venomer-Rat.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: 6KB - Virtual size: 5KB

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