umbral | SolaraB[.]rar | Triage

Resubmissions

04-07-2024 13:03

240704-qaf1tsxckj 10

04-07-2024 12:47

240704-p1mqmaxbjr 10

Sharing

General

Target

SolaraB.rar
Size

76KB
MD5

9ad679577500b09d525e224e36667ba4
SHA1

e8c8a7afd0c415b94e65e6d0b782852fd0fe508d
SHA256

351cba23cab65cd57d5ec9e553bfa02d35a32a8f75467a75b1c3735b87af6a3d
SHA512

8f0b245ce641a8912f9c8482c7286bdcf19defd7381f4ee985e0f59701ead1ea134c03816545a9b848b43116afe7da371c2ba6d62b26ccdc5e7b579b68e3c736
SSDEEP

1536:zi2l3ISJ6HumuVjcjvlUiKFyTh7hxcj/Z1jY8LkoGFuQ3d:zl3pJjmeQ5URyd7n8/Z1xozFugd

Score

10^/10

Malware Config

Extracted

Family

umbral

C2

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

Signatures

Detect Umbral payload 1 IoCs

Processes:

resource yara_rule

static1/unpack001/SolaraB/Solara/solarabootstrapper.exe family_umbral
Umbral family
umbral
Unsigned PE 1 IoCs
Checks for missing Authenticode signature.

Processes:

resource

unpack001/SolaraB/Solara/solarabootstrapper.exe

Files

SolaraB.rar
.rar

Password: infected
SolaraB/Solara/solarabootstrapper.exe
.exe windows:4 windows x86 arch:x86

Password: infected

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
tinytask.ini