umbral | ce8f179e7e29d4f28f1c5039808e82c198264183166069d8ad567f63275c74a8

Resubmissions

27-04-2024 22:30

240427-2faxjsac8z 10

27-04-2024 22:14

240427-15m3qshf69 10

Analysis

max time kernel
195s
max time network
298s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
27-04-2024 22:30

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

immortal.bin.exe
Size

1.1MB
MD5

9e511d399fbc2bf0c2d45302dc62be61
SHA1

3100c1c0c5f98b1a7bccef0cdcfde6b34e38992b
SHA256

ce8f179e7e29d4f28f1c5039808e82c198264183166069d8ad567f63275c74a8
SHA512

7e4560bd6e76d181b47f44eca0a7195cb905e852ed2a94308cad57576a16c62335256978c73ddac275d736423c5c6a9a4eed648090847ee80e8183be77c04486
SSDEEP

24576:fO29aTBMPYvJnXAvKhO7CMbNdCrty7ARVJ3g6cbhbZxvI:G29adQt3CrtWQcb3xv

Score

10^/10

umbral stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1230863499496783923/A02kDLEw6wbN8ixBXQtfYqly_yrSOMARWe64V1_a5LlUVAnlyyQj7Axye820VBzQV8HJ

Signatures

Detect Umbral payload 2 IoCs

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Local\Temp\dykelpby.cpq.exe	family_umbral
behavioral2/memory/3452-11-0x0000016D96F80000-0x0000016D96FC0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

dykelpby.cpq.exe

pid process

3452 dykelpby.cpq.exe
Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

3 raw.githubusercontent.com
4 raw.githubusercontent.com
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

immortal.bin.exe

pid process

4296 immortal.bin.exe
4296 immortal.bin.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3452	dykelpby.cpq.exe

flow	ioc
3	raw.githubusercontent.com
4	raw.githubusercontent.com

pid	process
4296	immortal.bin.exe
4296	immortal.bin.exe

Suspicious use of AdjustPrivilegeToken 44 IoCs

Processes:

immortal.bin.exedykelpby.cpq.exewmic.exe

description	pid	process
Token: SeDebugPrivilege	4296	immortal.bin.exe
Token: SeDebugPrivilege	3452	dykelpby.cpq.exe
Token: SeIncreaseQuotaPrivilege	3068	wmic.exe
Token: SeSecurityPrivilege	3068	wmic.exe
Token: SeTakeOwnershipPrivilege	3068	wmic.exe
Token: SeLoadDriverPrivilege	3068	wmic.exe
Token: SeSystemProfilePrivilege	3068	wmic.exe
Token: SeSystemtimePrivilege	3068	wmic.exe
Token: SeProfSingleProcessPrivilege	3068	wmic.exe
Token: SeIncBasePriorityPrivilege	3068	wmic.exe
Token: SeCreatePagefilePrivilege	3068	wmic.exe
Token: SeBackupPrivilege	3068	wmic.exe
Token: SeRestorePrivilege	3068	wmic.exe
Token: SeShutdownPrivilege	3068	wmic.exe
Token: SeDebugPrivilege	3068	wmic.exe
Token: SeSystemEnvironmentPrivilege	3068	wmic.exe
Token: SeRemoteShutdownPrivilege	3068	wmic.exe
Token: SeUndockPrivilege	3068	wmic.exe
Token: SeManageVolumePrivilege	3068	wmic.exe
Token: 33	3068	wmic.exe
Token: 34	3068	wmic.exe
Token: 35	3068	wmic.exe
Token: 36	3068	wmic.exe
Token: SeIncreaseQuotaPrivilege	3068	wmic.exe
Token: SeSecurityPrivilege	3068	wmic.exe
Token: SeTakeOwnershipPrivilege	3068	wmic.exe
Token: SeLoadDriverPrivilege	3068	wmic.exe
Token: SeSystemProfilePrivilege	3068	wmic.exe
Token: SeSystemtimePrivilege	3068	wmic.exe
Token: SeProfSingleProcessPrivilege	3068	wmic.exe
Token: SeIncBasePriorityPrivilege	3068	wmic.exe
Token: SeCreatePagefilePrivilege	3068	wmic.exe
Token: SeBackupPrivilege	3068	wmic.exe
Token: SeRestorePrivilege	3068	wmic.exe
Token: SeShutdownPrivilege	3068	wmic.exe
Token: SeDebugPrivilege	3068	wmic.exe
Token: SeSystemEnvironmentPrivilege	3068	wmic.exe
Token: SeRemoteShutdownPrivilege	3068	wmic.exe
Token: SeUndockPrivilege	3068	wmic.exe
Token: SeManageVolumePrivilege	3068	wmic.exe
Token: 33	3068	wmic.exe
Token: 34	3068	wmic.exe
Token: 35	3068	wmic.exe
Token: 36	3068	wmic.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

immortal.bin.exe

pid process

4296 immortal.bin.exe

pid	process
4296	immortal.bin.exe

Suspicious use of WriteProcessMemory 4 IoCs

Processes:

immortal.bin.exedykelpby.cpq.exe

description	pid	process	target process
PID 4296 wrote to memory of 3452	4296	immortal.bin.exe	dykelpby.cpq.exe
PID 4296 wrote to memory of 3452	4296	immortal.bin.exe	dykelpby.cpq.exe
PID 3452 wrote to memory of 3068	3452	dykelpby.cpq.exe	wmic.exe
PID 3452 wrote to memory of 3068	3452	dykelpby.cpq.exe	wmic.exe

C:\Users\Admin\AppData\Local\Temp\immortal.bin.exe
"C:\Users\Admin\AppData\Local\Temp\immortal.bin.exe"
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4296
- C:\Users\Admin\AppData\Local\Temp\dykelpby.cpq.exe
  "C:\Users\Admin\AppData\Local\Temp\dykelpby.cpq.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3452
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3068

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\dykelpby.cpq.exe

Filesize
227KB

MD5
7f32dcbb00de079c31ff7895ae9c0560

SHA1
e80841a355b8dce9955b9bbba63f02a4ad31a836

SHA256
5658f42d6332d99827d772a710d74e905f822d23e958c86f802973c2cffe850f

SHA512
776cabc7d2442d90655eec0f434c811146b7f569dbace3c8609a582c167af5990ec25d1d7a8eb111744cecbdcd43d37af7d623eb97eb414ad926371083f7aadc

Download Submit
memory/3452-11-0x0000016D96F80000-0x0000016D96FC0000-memory.dmp

Filesize
256KB

Download
memory/3452-15-0x0000016DB1620000-0x0000016DB1630000-memory.dmp

Filesize
64KB

Download
memory/3452-14-0x00007FFD6FBC0000-0x00007FFD705AC000-memory.dmp

Filesize
9.9MB

Download
memory/3452-17-0x00007FFD6FBC0000-0x00007FFD705AC000-memory.dmp

Filesize
9.9MB

Download
memory/4296-0-0x00000000000B0000-0x000000000041E000-memory.dmp

Filesize
3.4MB

Download
memory/4296-1-0x00000000000B0000-0x000000000041E000-memory.dmp

Filesize
3.4MB

Download
memory/4296-2-0x0000000073450000-0x0000000073B3E000-memory.dmp

Filesize
6.9MB

Download
memory/4296-3-0x00000000055A0000-0x00000000055B0000-memory.dmp

Filesize
64KB

Download
memory/4296-12-0x00000000000B0000-0x000000000041E000-memory.dmp

Filesize
3.4MB

Download
memory/4296-13-0x0000000073450000-0x0000000073B3E000-memory.dmp

Filesize
6.9MB

Download