umbral | SolaraB[.]rar

General

Target
SolaraB.rar
Size 76KB
Sample240704-rtb2nazeqc
SHA256 c8615f0c7412de9bab6307491a5084aed1faf308664bc4d21e8d83101afdeb0a
MD5 6411b4a9a246eef97e589a9df2882f8a
SHA1 1d90311acb334f288f4996df26b1800403a0948f
SHA512 0199a12c1fdcdc0125e29d578e6111fb5cd3a51d5370c618fbeba138fe2c42e31418a611df7ead727f510b7da7a53e71f2c09c59850253d58ac07b5b658dcb4f
SSDEEP 1536:Ki2l3ISJ6HumuVjcjvlUiKFyTh7hxcj/Z1jY8LkoGFuQ3n:Ql3pJjmeQ5URyd7n8/Z1xozFugn
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

umbral

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1258158330237423708/TP4vZ1k1Rh4BbYP62cogAVNmLUNicORrL9xsgCelKxJelwVrWSmY1bVmhh1Yvxap5YQ-

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
static1/unpack001/SolaraB/Solara/solarabootstrapper.exe	family_umbral

Umbral family
umbral

Unsigned PE 1 IoCs

Checks for missing Authenticode signature.

resource
unpack001/SolaraB/Solara/solarabootstrapper.exe

File Explorer

SolaraB.rar

.rar 76KB
SolaraB/Solara/solarabootstrapper.exe

.exe 227KB

SolaraB.rar

SHA256 c8615f0c7412de9bab6307491a5084aed1faf308664bc4d21e8d83101afdeb0a
MD5 6411b4a9a246eef97e589a9df2882f8a
SHA1 1d90311acb334f288f4996df26b1800403a0948f
SHA512 0199a12c1fdcdc0125e29d578e6111fb5cd3a51d5370c618fbeba138fe2c42e31418a611df7ead727f510b7da7a53e71f2c09c59850253d58ac07b5b658dcb4f
SSDEEP 1536:Ki2l3ISJ6HumuVjcjvlUiKFyTh7hxcj/Z1jY8LkoGFuQ3n:Ql3pJjmeQ5URyd7n8/Z1xozFugn
MD5 SHA1 SHA512 SSDEEP

SolaraB/Solara/solarabootstrapper.exe

IMPHASH f34d5f2d4577ed6d9ceec516c1f5a744
SHA256 bccba62c31f689715d01f4e80edbe2fe6a816edb571c4a409fccbe2d5b789b65
MD5 ebf1358b8496d5c895f4b8f9298f7f96
SHA1 f0136d66bf877934376858064344c2038b998fd4
SHA512 ca82e5838c7e8b292f46e5b20684b7fbb861f449678fc6283bd5c587c0958c069800e94c9f65b239609434564a394f8ca168d83d40bc27c96ade6c18744beb6d
SSDEEP 6144:eloZMLrIkd8g+EtXHkv/iD46E6TjpaC9sop7mGz3/b8e1mZJi:IoZ0L+EP86E6TjpaC9sop7mGzLt
MD5 SHA1 SHA512 SSDEEP

windows:4 windows x86 arch:x86

Detect Umbral payload
Unsigned PE

Checks for missing Authenticode signature.

Minor OS version

0

Major OS version

4

Entry point

238046

Magic Number

267

Subsystem

IMAGE_SUBSYSTEM_WINDOWS_GUI

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

PDB paths

SolaraB.rar

SolaraB/Solara/solarabootstrapper.exe

mscoree

dotnet

Sharing

General

Malware Config

Extracted

Signatures

File Explorer

SolaraB.rar

SolaraB/Solara/solarabootstrapper.exe

mscoree

dotnet