umbral | 482c7fa477b50ba1f6f6254060c2e472a23c3c18da7f1bab3f19691fc3dca563

Analysis

max time kernel
147s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-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
behavioral1/files/0x00070000000232c8-65.dat	family_umbral
behavioral1/memory/440-67-0x00000293684B0000-0x00000293684F2000-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-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation	cmd.exe

Executes dropped EXE 3 IoCs

pid	Process
440	Netflix Checker.exe
4136	Netflix Checker.exe
788	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 2 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000_Classes\Local Settings	7zFM.exe
Key created	\REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3608	7zFM.exe
3608	7zFM.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3608	7zFM.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeRestorePrivilege	3608	7zFM.exe
Token: 35	3608	7zFM.exe
Token: SeSecurityPrivilege	3608	7zFM.exe
Token: SeSecurityPrivilege	3608	7zFM.exe
Token: SeSecurityPrivilege	3608	7zFM.exe
Token: SeDebugPrivilege	440	Netflix Checker.exe
Token: SeIncreaseQuotaPrivilege	3744	wmic.exe
Token: SeSecurityPrivilege	3744	wmic.exe
Token: SeTakeOwnershipPrivilege	3744	wmic.exe
Token: SeLoadDriverPrivilege	3744	wmic.exe
Token: SeSystemProfilePrivilege	3744	wmic.exe
Token: SeSystemtimePrivilege	3744	wmic.exe
Token: SeProfSingleProcessPrivilege	3744	wmic.exe
Token: SeIncBasePriorityPrivilege	3744	wmic.exe
Token: SeCreatePagefilePrivilege	3744	wmic.exe
Token: SeBackupPrivilege	3744	wmic.exe
Token: SeRestorePrivilege	3744	wmic.exe
Token: SeShutdownPrivilege	3744	wmic.exe
Token: SeDebugPrivilege	3744	wmic.exe
Token: SeSystemEnvironmentPrivilege	3744	wmic.exe
Token: SeRemoteShutdownPrivilege	3744	wmic.exe
Token: SeUndockPrivilege	3744	wmic.exe
Token: SeManageVolumePrivilege	3744	wmic.exe
Token: 33	3744	wmic.exe
Token: 34	3744	wmic.exe
Token: 35	3744	wmic.exe
Token: 36	3744	wmic.exe
Token: SeIncreaseQuotaPrivilege	3744	wmic.exe
Token: SeSecurityPrivilege	3744	wmic.exe
Token: SeTakeOwnershipPrivilege	3744	wmic.exe
Token: SeLoadDriverPrivilege	3744	wmic.exe
Token: SeSystemProfilePrivilege	3744	wmic.exe
Token: SeSystemtimePrivilege	3744	wmic.exe
Token: SeProfSingleProcessPrivilege	3744	wmic.exe
Token: SeIncBasePriorityPrivilege	3744	wmic.exe
Token: SeCreatePagefilePrivilege	3744	wmic.exe
Token: SeBackupPrivilege	3744	wmic.exe
Token: SeRestorePrivilege	3744	wmic.exe
Token: SeShutdownPrivilege	3744	wmic.exe
Token: SeDebugPrivilege	3744	wmic.exe
Token: SeSystemEnvironmentPrivilege	3744	wmic.exe
Token: SeRemoteShutdownPrivilege	3744	wmic.exe
Token: SeUndockPrivilege	3744	wmic.exe
Token: SeManageVolumePrivilege	3744	wmic.exe
Token: 33	3744	wmic.exe
Token: 34	3744	wmic.exe
Token: 35	3744	wmic.exe
Token: 36	3744	wmic.exe
Token: SeDebugPrivilege	4136	Netflix Checker.exe
Token: SeIncreaseQuotaPrivilege	3496	wmic.exe
Token: SeSecurityPrivilege	3496	wmic.exe
Token: SeTakeOwnershipPrivilege	3496	wmic.exe
Token: SeLoadDriverPrivilege	3496	wmic.exe
Token: SeSystemProfilePrivilege	3496	wmic.exe
Token: SeSystemtimePrivilege	3496	wmic.exe
Token: SeProfSingleProcessPrivilege	3496	wmic.exe
Token: SeIncBasePriorityPrivilege	3496	wmic.exe
Token: SeCreatePagefilePrivilege	3496	wmic.exe
Token: SeBackupPrivilege	3496	wmic.exe
Token: SeRestorePrivilege	3496	wmic.exe
Token: SeShutdownPrivilege	3496	wmic.exe
Token: SeDebugPrivilege	3496	wmic.exe
Token: SeSystemEnvironmentPrivilege	3496	wmic.exe
Token: SeRemoteShutdownPrivilege	3496	wmic.exe

Suspicious use of FindShellTrayWindow 5 IoCs

pid	Process
3608	7zFM.exe
3608	7zFM.exe
3608	7zFM.exe
3608	7zFM.exe
3608	7zFM.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 1388 wrote to memory of 3608	1388	cmd.exe	90
PID 1388 wrote to memory of 3608	1388	cmd.exe	90
PID 3608 wrote to memory of 1836	3608	7zFM.exe	99
PID 3608 wrote to memory of 1836	3608	7zFM.exe	99
PID 440 wrote to memory of 3744	440	Netflix Checker.exe	104
PID 440 wrote to memory of 3744	440	Netflix Checker.exe	104
PID 4136 wrote to memory of 3496	4136	Netflix Checker.exe	107
PID 4136 wrote to memory of 3496	4136	Netflix Checker.exe	107
PID 788 wrote to memory of 456	788	Netflix Checker.exe	110
PID 788 wrote to memory of 456	788	Netflix Checker.exe	110

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\Netflix_Checker_50K__CPM.rar
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:1388
- 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⤵
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of WriteProcessMemory
  PID:3608
- - C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\7zO81EB38F7\pass 1122.txt
    3⤵
    PID:1836

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:4432

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:440
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3744

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:4136
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:3496

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:788
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:456

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

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Downloads

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

Filesize
1KB

MD5
8094b248fe3231e48995c2be32aeb08c

SHA1
2fe06e000ebec919bf982d033c5d1219c1f916b6

SHA256
136c30d964f4abbb5279bdc86d0e00578333782f15f05f0d2d050730dcb7a9bc

SHA512
bf27a3822008796370e2c506c910a40992b9240606ea1bc19f683b2fee86b81897660ac0cf8e746ca093dae9e408949e2e9002ded75678a69f020d3b0452801f

Download Submit
C:\Users\Admin\AppData\Local\Temp\7zO81EB38F7\pass 1122.txt

Filesize
9B

MD5
50da9795513edb709f05cc3dd45bb875

SHA1
28b8ffc4bffa76f728391d21e72d73de359b706b

SHA256
80aad06e823c524b80b779f2ad1722508460609de79319ec1e8f87a72fd2085c

SHA512
6d4ddfd185f093a91e93c878283cffc3b1603d43dad57b896af03b4025f42ebcaa908b02070051e275073416076c518c4f562b589da8ca8c45747b003f73942e

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/440-71-0x00007FFF29600000-0x00007FFF2A0C1000-memory.dmp

Filesize
10.8MB

Download
memory/440-69-0x000002936A9A0000-0x000002936A9B0000-memory.dmp

Filesize
64KB

Download
memory/440-68-0x00007FFF29600000-0x00007FFF2A0C1000-memory.dmp

Filesize
10.8MB

Download
memory/440-67-0x00000293684B0000-0x00000293684F2000-memory.dmp

Filesize
264KB

Download
memory/788-78-0x00007FFF29600000-0x00007FFF2A0C1000-memory.dmp

Filesize
10.8MB

Download
memory/788-79-0x0000017674DF0000-0x0000017674E00000-memory.dmp

Filesize
64KB

Download
memory/788-80-0x00007FFF29600000-0x00007FFF2A0C1000-memory.dmp

Filesize
10.8MB

Download
memory/4136-74-0x00007FFF29600000-0x00007FFF2A0C1000-memory.dmp

Filesize
10.8MB

Download
memory/4136-75-0x00000258534D0000-0x00000258534E0000-memory.dmp

Filesize
64KB

Download
memory/4136-76-0x00007FFF29600000-0x00007FFF2A0C1000-memory.dmp

Filesize
10.8MB

Download