umbral | 921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76

Analysis

max time kernel
92s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
14-12-2024 12:04

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General

Target

921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe
Size

231KB
MD5

85eadbe66e59f3512bfed3edd076ed4c
SHA1

3fac3f7414bd4ced53beb1d89402524a2b9cb510
SHA256

921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76
SHA512

18ca000aaec36bb3221cd70e042b1dd49ace60ff1469059eb4e27c0af8889d5dc31133827a97a8f146970097b70152e7e65d5286fa0721476c5b8cb06277637e
SSDEEP

6144:RloZM3rIkd8g+EtXHkv/iD4iYQ5ClU8e1mmN5i:joZIL+EP8Jo1Ng

Score

10^/10

umbral execution stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/3100-1-0x0000024036270000-0x00000240362B0000-memory.dmp	family_umbral

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

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4480	powershell.exe
1936	powershell.exe
1464	powershell.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
21	discord.com
22	discord.com

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
18	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4248	wmic.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4480	powershell.exe
4480	powershell.exe
1936	powershell.exe
1936	powershell.exe
1464	powershell.exe
1464	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe
Token: SeDebugPrivilege	4480	powershell.exe
Token: SeDebugPrivilege	1936	powershell.exe
Token: SeIncreaseQuotaPrivilege	4884	wmic.exe
Token: SeSecurityPrivilege	4884	wmic.exe
Token: SeTakeOwnershipPrivilege	4884	wmic.exe
Token: SeLoadDriverPrivilege	4884	wmic.exe
Token: SeSystemProfilePrivilege	4884	wmic.exe
Token: SeSystemtimePrivilege	4884	wmic.exe
Token: SeProfSingleProcessPrivilege	4884	wmic.exe
Token: SeIncBasePriorityPrivilege	4884	wmic.exe
Token: SeCreatePagefilePrivilege	4884	wmic.exe
Token: SeBackupPrivilege	4884	wmic.exe
Token: SeRestorePrivilege	4884	wmic.exe
Token: SeShutdownPrivilege	4884	wmic.exe
Token: SeDebugPrivilege	4884	wmic.exe
Token: SeSystemEnvironmentPrivilege	4884	wmic.exe
Token: SeRemoteShutdownPrivilege	4884	wmic.exe
Token: SeUndockPrivilege	4884	wmic.exe
Token: SeManageVolumePrivilege	4884	wmic.exe
Token: 33	4884	wmic.exe
Token: 34	4884	wmic.exe
Token: 35	4884	wmic.exe
Token: 36	4884	wmic.exe
Token: SeIncreaseQuotaPrivilege	4884	wmic.exe
Token: SeSecurityPrivilege	4884	wmic.exe
Token: SeTakeOwnershipPrivilege	4884	wmic.exe
Token: SeLoadDriverPrivilege	4884	wmic.exe
Token: SeSystemProfilePrivilege	4884	wmic.exe
Token: SeSystemtimePrivilege	4884	wmic.exe
Token: SeProfSingleProcessPrivilege	4884	wmic.exe
Token: SeIncBasePriorityPrivilege	4884	wmic.exe
Token: SeCreatePagefilePrivilege	4884	wmic.exe
Token: SeBackupPrivilege	4884	wmic.exe
Token: SeRestorePrivilege	4884	wmic.exe
Token: SeShutdownPrivilege	4884	wmic.exe
Token: SeDebugPrivilege	4884	wmic.exe
Token: SeSystemEnvironmentPrivilege	4884	wmic.exe
Token: SeRemoteShutdownPrivilege	4884	wmic.exe
Token: SeUndockPrivilege	4884	wmic.exe
Token: SeManageVolumePrivilege	4884	wmic.exe
Token: 33	4884	wmic.exe
Token: 34	4884	wmic.exe
Token: 35	4884	wmic.exe
Token: 36	4884	wmic.exe
Token: SeIncreaseQuotaPrivilege	1128	wmic.exe
Token: SeSecurityPrivilege	1128	wmic.exe
Token: SeTakeOwnershipPrivilege	1128	wmic.exe
Token: SeLoadDriverPrivilege	1128	wmic.exe
Token: SeSystemProfilePrivilege	1128	wmic.exe
Token: SeSystemtimePrivilege	1128	wmic.exe
Token: SeProfSingleProcessPrivilege	1128	wmic.exe
Token: SeIncBasePriorityPrivilege	1128	wmic.exe
Token: SeCreatePagefilePrivilege	1128	wmic.exe
Token: SeBackupPrivilege	1128	wmic.exe
Token: SeRestorePrivilege	1128	wmic.exe
Token: SeShutdownPrivilege	1128	wmic.exe
Token: SeDebugPrivilege	1128	wmic.exe
Token: SeSystemEnvironmentPrivilege	1128	wmic.exe
Token: SeRemoteShutdownPrivilege	1128	wmic.exe
Token: SeUndockPrivilege	1128	wmic.exe
Token: SeManageVolumePrivilege	1128	wmic.exe
Token: 33	1128	wmic.exe
Token: 34	1128	wmic.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 3100 wrote to memory of 4480	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	83
PID 3100 wrote to memory of 4480	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	83
PID 3100 wrote to memory of 1936	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	85
PID 3100 wrote to memory of 1936	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	85
PID 3100 wrote to memory of 4884	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	87
PID 3100 wrote to memory of 4884	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	87
PID 3100 wrote to memory of 1128	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	90
PID 3100 wrote to memory of 1128	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	90
PID 3100 wrote to memory of 3088	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	92
PID 3100 wrote to memory of 3088	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	92
PID 3100 wrote to memory of 1464	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	94
PID 3100 wrote to memory of 1464	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	94
PID 3100 wrote to memory of 4248	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	96
PID 3100 wrote to memory of 4248	3100	921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe	96

C:\Users\Admin\AppData\Local\Temp\921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe
"C:\Users\Admin\AppData\Local\Temp\921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3100
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\921ba78ef5661ee885d93756f28f7e4df163f1ea910af6c68266f856b112ce76.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4480
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1936
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:4884
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1128
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3088
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:1464
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4248

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

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

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
c9b6705519e1eef08f86c4ba5f4286f3

SHA1
6c6b179e452ecee2673a1d4fe128f1c06f70577f

SHA256
0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705

SHA512
6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tje1lgam.ogf.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3100-51-0x00007FFABFA60000-0x00007FFAC0521000-memory.dmp

Filesize
10.8MB

Download
memory/3100-0-0x00007FFABFA63000-0x00007FFABFA65000-memory.dmp

Filesize
8KB

Download
memory/3100-50-0x00000240507B0000-0x00000240508B2000-memory.dmp

Filesize
1.0MB

Download
memory/3100-34-0x0000024050B80000-0x0000024050BF6000-memory.dmp

Filesize
472KB

Download
memory/3100-35-0x0000024037F70000-0x0000024037F8E000-memory.dmp

Filesize
120KB

Download
memory/3100-2-0x00007FFABFA60000-0x00007FFAC0521000-memory.dmp

Filesize
10.8MB

Download
memory/3100-1-0x0000024036270000-0x00000240362B0000-memory.dmp

Filesize
256KB

Download
memory/3100-32-0x0000024037F50000-0x0000024037F62000-memory.dmp

Filesize
72KB

Download
memory/3100-31-0x0000024037F10000-0x0000024037F1A000-memory.dmp

Filesize
40KB

Download
memory/4480-13-0x00007FFABFA60000-0x00007FFAC0521000-memory.dmp

Filesize
10.8MB

Download
memory/4480-18-0x00007FFABFA60000-0x00007FFAC0521000-memory.dmp

Filesize
10.8MB

Download
memory/4480-15-0x00007FFABFA60000-0x00007FFAC0521000-memory.dmp

Filesize
10.8MB

Download
memory/4480-14-0x00007FFABFA60000-0x00007FFAC0521000-memory.dmp

Filesize
10.8MB

Download
memory/4480-8-0x000001CFC1290000-0x000001CFC12B2000-memory.dmp

Filesize
136KB

Download