umbral | 3156fea939c2b71683a306896ad4185b9c3afb57930fb17d9207ff78161e7dfd

Analysis

max time kernel
147s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
17-03-2024 16:20

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General

Target

flameware free spoof.exe
Size

445KB
MD5

4bbcdd97740fb152109f809a6625e0bb
SHA1

69993fd2dc46acb60d4f95e553ab7bd66096305d
SHA256

3156fea939c2b71683a306896ad4185b9c3afb57930fb17d9207ff78161e7dfd
SHA512

5246b088157b6e3a1e61fb90c0cef054aafe11708ab12a9b35cf1ba5875080b2d037342637333eb57fc6cc41a918af1674bb91343c3c4a62ad2a4e03b0aa6417
SSDEEP

6144:eSncRlyToy9yZ/koAvzDIjjL+dLCULOoepRXgtlAiLcW7tBWJ+q:z48ToYyZMoAvzDIjjSdBLyVW7tQJ3

Score

10^/10

umbral stealer

Malware Config

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000800000002321d-5.dat	family_umbral
behavioral1/memory/2280-20-0x0000020304A00000-0x0000020304A4A000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-399997616-3400990511-967324271-1000\Control Panel\International\Geo\Nation	flameware free spoof.exe

Executes dropped EXE 2 IoCs

pid	Process
2280	BIG BLACK BOOTY BITCHES.EXE
64	EXPOSINGCLOWNS.EXE

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
3656	64	WerFault.exe	91

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2824 wrote to memory of 2280	2824	flameware free spoof.exe	90
PID 2824 wrote to memory of 2280	2824	flameware free spoof.exe	90
PID 2824 wrote to memory of 64	2824	flameware free spoof.exe	91
PID 2824 wrote to memory of 64	2824	flameware free spoof.exe	91
PID 2824 wrote to memory of 64	2824	flameware free spoof.exe	91

C:\Users\Admin\AppData\Local\Temp\flameware free spoof.exe
"C:\Users\Admin\AppData\Local\Temp\flameware free spoof.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2824
- C:\Users\Admin\AppData\Local\Temp\BIG BLACK BOOTY BITCHES.EXE
  "C:\Users\Admin\AppData\Local\Temp\BIG BLACK BOOTY BITCHES.EXE"
  2⤵
  - Executes dropped EXE
  PID:2280
- C:\Users\Admin\AppData\Local\Temp\EXPOSINGCLOWNS.EXE
  "C:\Users\Admin\AppData\Local\Temp\EXPOSINGCLOWNS.EXE"
  2⤵
  - Executes dropped EXE
  PID:64
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 64 -s 1052
    3⤵
    - Program crash
    PID:3656

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 64 -ip 64
1⤵
PID:2836

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\BIG BLACK BOOTY BITCHES.EXE

Filesize
272KB

MD5
96c600f16edb930d23703cbd7ec512f1

SHA1
35677f59c0f8f652a9224efda1784700da43c3bb

SHA256
10577cf4d3577ce6c7a897b6130904deac8302dabdb7768d9ef7caed998ba0b6

SHA512
ab92334dcd24269ecb9e68320ee90ff7827418ab1b21f8f8ba838a460c30860464a1df1eaad8a6f6fdbc1877ab8bc9e3bfcc0d4ae35bb205d255e6295dbb1eb3

Download Submit
C:\Users\Admin\AppData\Local\Temp\EXPOSINGCLOWNS.EXE

Filesize
119KB

MD5
35c72e33f368be9330f73a6dacc877af

SHA1
12982be9f287e3100215116e3d025b6072970256

SHA256
2b5159a33b3940e4241ec7566e01f34cd41efdf5adc628b05f6ec0aad592fece

SHA512
b1ff93d21cdb681eea0a8e46f927b50e85c765578e47f6e2976212a9c363fffff9276ff07889a443145b6b7074cf003db45204afd372b36d910edf56c0264134

Download Submit
memory/64-23-0x0000000000C70000-0x0000000000C94000-memory.dmp

Filesize
144KB

Download
memory/64-25-0x0000000005C10000-0x00000000061B4000-memory.dmp

Filesize
5.6MB

Download
memory/64-26-0x0000000073D00000-0x00000000744B0000-memory.dmp

Filesize
7.7MB

Download
memory/64-27-0x0000000005560000-0x00000000055F2000-memory.dmp

Filesize
584KB

Download
memory/64-28-0x00000000057F0000-0x0000000005800000-memory.dmp

Filesize
64KB

Download
memory/64-29-0x0000000005550000-0x000000000555A000-memory.dmp

Filesize
40KB

Download
memory/64-30-0x0000000073D00000-0x00000000744B0000-memory.dmp

Filesize
7.7MB

Download
memory/2280-20-0x0000020304A00000-0x0000020304A4A000-memory.dmp

Filesize
296KB

Download
memory/2280-24-0x00007FFDEBB40000-0x00007FFDEC601000-memory.dmp

Filesize
10.8MB

Download
memory/2280-32-0x00007FFDEBB40000-0x00007FFDEC601000-memory.dmp

Filesize
10.8MB

Download