umbral | 482c7fa477b50ba1f6f6254060c2e472a23c3c18da7f1bab3f19691fc3dca563

Analysis

max time kernel
134s
max time network
124s
platform
windows11-21h2_x64
resource
win11-20240221-en
resource tags

arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
submitted
27-02-2024 19:29

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General

Target

Netflix_Checker_50K__CPM.rar
Size

8.2MB
MD5

1e13454bdfc4f54a02339c99279b6b2e
SHA1

8d025bb5e2990aa898d1ce299e68b2ca86ec74b0
SHA256

482c7fa477b50ba1f6f6254060c2e472a23c3c18da7f1bab3f19691fc3dca563
SHA512

c6f2bfc11e0712d6333ac8034555df7d42342bb1a7ffd9d6728fe73cd7a4a5f1636b14231630eee01b280f85b7f01d64852b3f71d68c056d28829b6322062159
SSDEEP

196608:+0hW8xil8grmCHD7J0FzEuPoBsPVSN6ql:+0887gRnJ8zEoo2PV06ql

Score

10^/10

umbral stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1153056107867164752/tRuN1HzDWrxnDeJOXWa-NtAfRVdka8UNdyoIo4-qrYXI_C1XFMggkrLEFyTkoagsN9jt

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000100000002a868-60.dat	family_umbral
behavioral2/memory/484-62-0x000002625E9A0000-0x000002625E9E2000-memory.dmp	family_umbral

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

Executes dropped EXE 3 IoCs

pid	Process
484	Netflix Checker.exe
2484	Netflix Checker.exe
2628	Netflix Checker.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2930051783-2551506282-3430162621-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
984	7zFM.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeRestorePrivilege	984	7zFM.exe
Token: 35	984	7zFM.exe
Token: SeSecurityPrivilege	984	7zFM.exe
Token: SeDebugPrivilege	484	Netflix Checker.exe
Token: SeIncreaseQuotaPrivilege	3012	wmic.exe
Token: SeSecurityPrivilege	3012	wmic.exe
Token: SeTakeOwnershipPrivilege	3012	wmic.exe
Token: SeLoadDriverPrivilege	3012	wmic.exe
Token: SeSystemProfilePrivilege	3012	wmic.exe
Token: SeSystemtimePrivilege	3012	wmic.exe
Token: SeProfSingleProcessPrivilege	3012	wmic.exe
Token: SeIncBasePriorityPrivilege	3012	wmic.exe
Token: SeCreatePagefilePrivilege	3012	wmic.exe
Token: SeBackupPrivilege	3012	wmic.exe
Token: SeRestorePrivilege	3012	wmic.exe
Token: SeShutdownPrivilege	3012	wmic.exe
Token: SeDebugPrivilege	3012	wmic.exe
Token: SeSystemEnvironmentPrivilege	3012	wmic.exe
Token: SeRemoteShutdownPrivilege	3012	wmic.exe
Token: SeUndockPrivilege	3012	wmic.exe
Token: SeManageVolumePrivilege	3012	wmic.exe
Token: 33	3012	wmic.exe
Token: 34	3012	wmic.exe
Token: 35	3012	wmic.exe
Token: 36	3012	wmic.exe
Token: SeIncreaseQuotaPrivilege	3012	wmic.exe
Token: SeSecurityPrivilege	3012	wmic.exe
Token: SeTakeOwnershipPrivilege	3012	wmic.exe
Token: SeLoadDriverPrivilege	3012	wmic.exe
Token: SeSystemProfilePrivilege	3012	wmic.exe
Token: SeSystemtimePrivilege	3012	wmic.exe
Token: SeProfSingleProcessPrivilege	3012	wmic.exe
Token: SeIncBasePriorityPrivilege	3012	wmic.exe
Token: SeCreatePagefilePrivilege	3012	wmic.exe
Token: SeBackupPrivilege	3012	wmic.exe
Token: SeRestorePrivilege	3012	wmic.exe
Token: SeShutdownPrivilege	3012	wmic.exe
Token: SeDebugPrivilege	3012	wmic.exe
Token: SeSystemEnvironmentPrivilege	3012	wmic.exe
Token: SeRemoteShutdownPrivilege	3012	wmic.exe
Token: SeUndockPrivilege	3012	wmic.exe
Token: SeManageVolumePrivilege	3012	wmic.exe
Token: 33	3012	wmic.exe
Token: 34	3012	wmic.exe
Token: 35	3012	wmic.exe
Token: 36	3012	wmic.exe
Token: SeDebugPrivilege	2484	Netflix Checker.exe
Token: SeIncreaseQuotaPrivilege	536	wmic.exe
Token: SeSecurityPrivilege	536	wmic.exe
Token: SeTakeOwnershipPrivilege	536	wmic.exe
Token: SeLoadDriverPrivilege	536	wmic.exe
Token: SeSystemProfilePrivilege	536	wmic.exe
Token: SeSystemtimePrivilege	536	wmic.exe
Token: SeProfSingleProcessPrivilege	536	wmic.exe
Token: SeIncBasePriorityPrivilege	536	wmic.exe
Token: SeCreatePagefilePrivilege	536	wmic.exe
Token: SeBackupPrivilege	536	wmic.exe
Token: SeRestorePrivilege	536	wmic.exe
Token: SeShutdownPrivilege	536	wmic.exe
Token: SeDebugPrivilege	536	wmic.exe
Token: SeSystemEnvironmentPrivilege	536	wmic.exe
Token: SeRemoteShutdownPrivilege	536	wmic.exe
Token: SeUndockPrivilege	536	wmic.exe
Token: SeManageVolumePrivilege	536	wmic.exe

Suspicious use of FindShellTrayWindow 2 IoCs

pid	Process
984	7zFM.exe
984	7zFM.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1460 wrote to memory of 984	1460	cmd.exe	83
PID 1460 wrote to memory of 984	1460	cmd.exe	83
PID 484 wrote to memory of 3012	484	Netflix Checker.exe	97
PID 484 wrote to memory of 3012	484	Netflix Checker.exe	97
PID 2484 wrote to memory of 536	2484	Netflix Checker.exe	102
PID 2484 wrote to memory of 536	2484	Netflix Checker.exe	102
PID 2628 wrote to memory of 704	2628	Netflix Checker.exe	105
PID 2628 wrote to memory of 704	2628	Netflix Checker.exe	105

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Netflix_Checker_50K__CPM.rar
1⤵
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1460
- C:\Program Files\7-Zip\7zFM.exe
  "C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\Netflix_Checker_50K__CPM.rar"
  2⤵
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  PID:984

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:564

C:\Users\Admin\Desktop\NFC-main-master\Netflix Checker.exe
"C:\Users\Admin\Desktop\NFC-main-master\Netflix Checker.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:484
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3012

C:\Users\Admin\Desktop\NFC-main-master\Netflix Checker.exe
"C:\Users\Admin\Desktop\NFC-main-master\Netflix Checker.exe"
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2484
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:536

C:\Users\Admin\Desktop\NFC-main-master\Netflix Checker.exe
"C:\Users\Admin\Desktop\NFC-main-master\Netflix Checker.exe"
1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:2628
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:704

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

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Netflix Checker.exe.log

Filesize
1KB

MD5
02df789e3c730b309fc4d9abce5d729b

SHA1
4f9da0f0d4cadacfd0f68fb1f7ee73a66dcf1b4e

SHA256
4afabcd1723096359d90c8f32df7a6a44cd866e89d5b37c89280bfeab61d7321

SHA512
7ac0dd7e3a3e483d07409da793dd2b0915d4369fe41fe743acd82de9aa77b9fa7ea5cd60498034f3fa0674d93d184c9128375d8f7f0796fddecff3845fca8587

Download Submit
C:\Users\Admin\Desktop\NFC-main-master\Netflix Checker.exe

Filesize
242KB

MD5
011f4b831fa140d845aa76780370888d

SHA1
3624e855721b4224cd6066fff0f17e9d331d8bf3

SHA256
9bfd7a58f2a94cc5fc4d10e7fdbe7e09763c3e0f17611c3e573b76542e93dc7c

SHA512
0083abb2e649ecac73027adac87b359ff4f356712990e9f9acbc6834ba9cc474cd7866ade8d029147aa1b6e858a6fab9b566b05f4604b2cb9126f77fef8be006

Download Submit
memory/484-62-0x000002625E9A0000-0x000002625E9E2000-memory.dmp

Filesize
264KB

Download
memory/484-63-0x00007FFDA5DE0000-0x00007FFDA68A2000-memory.dmp

Filesize
10.8MB

Download
memory/484-64-0x0000026279000000-0x0000026279010000-memory.dmp

Filesize
64KB

Download
memory/484-66-0x00007FFDA5DE0000-0x00007FFDA68A2000-memory.dmp

Filesize
10.8MB

Download
memory/2484-69-0x00007FFDA5DE0000-0x00007FFDA68A2000-memory.dmp

Filesize
10.8MB

Download
memory/2484-70-0x0000018E1C9C0000-0x0000018E1C9D0000-memory.dmp

Filesize
64KB

Download
memory/2484-71-0x00007FFDA5DE0000-0x00007FFDA68A2000-memory.dmp

Filesize
10.8MB

Download
memory/2628-73-0x00007FFDA5DE0000-0x00007FFDA68A2000-memory.dmp

Filesize
10.8MB

Download
memory/2628-74-0x00000265F03E0000-0x00000265F03F0000-memory.dmp

Filesize
64KB

Download
memory/2628-75-0x00007FFDA5DE0000-0x00007FFDA68A2000-memory.dmp

Filesize
10.8MB

Download