umbral | a9e16fdb1ad53a73784a03803410b238e2de590eb1f7a1d6e4dfa0354ef99ca0

Analysis

max time kernel
121s
max time network
145s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
29-02-2024 13:21

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General

Target

nursultan.exe
Size

231KB
MD5

0a40e097ff34f2786e6a1b1c2695db2d
SHA1

7701f374e627f5624ee7b792c777d2b59b41ac20
SHA256

a9e16fdb1ad53a73784a03803410b238e2de590eb1f7a1d6e4dfa0354ef99ca0
SHA512

3ed97fbbd49460b582c51059b7e96535a951820179e89492f16668d176c8bb33ebaf8f4e056e5e909fcda74167dfa71cd8f83db840b10fb084019ae675982c47
SSDEEP

6144:xloZMArIkd8g+EtXHkv/iD44gTVBPUonRWvRsY94Fb8e1mFrQi:DoZHL+EP84gTVBPUonRWvRsY9sOJ

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/memory/2544-0-0x0000000000020000-0x0000000000060000-memory.dmp	family_umbral
behavioral1/memory/2544-2-0x000000001A980000-0x000000001AA00000-memory.dmp	family_umbral

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

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	nursultan.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

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

Web Service

T1102

flow	ioc
7	discord.com
8	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
5	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
1648	wmic.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
584	powershell.exe
2716	powershell.exe
1528	powershell.exe
1744	powershell.exe
980	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2544	nursultan.exe
Token: SeDebugPrivilege	584	powershell.exe
Token: SeDebugPrivilege	2716	powershell.exe
Token: SeDebugPrivilege	1528	powershell.exe
Token: SeDebugPrivilege	1744	powershell.exe
Token: SeIncreaseQuotaPrivilege	2088	wmic.exe
Token: SeSecurityPrivilege	2088	wmic.exe
Token: SeTakeOwnershipPrivilege	2088	wmic.exe
Token: SeLoadDriverPrivilege	2088	wmic.exe
Token: SeSystemProfilePrivilege	2088	wmic.exe
Token: SeSystemtimePrivilege	2088	wmic.exe
Token: SeProfSingleProcessPrivilege	2088	wmic.exe
Token: SeIncBasePriorityPrivilege	2088	wmic.exe
Token: SeCreatePagefilePrivilege	2088	wmic.exe
Token: SeBackupPrivilege	2088	wmic.exe
Token: SeRestorePrivilege	2088	wmic.exe
Token: SeShutdownPrivilege	2088	wmic.exe
Token: SeDebugPrivilege	2088	wmic.exe
Token: SeSystemEnvironmentPrivilege	2088	wmic.exe
Token: SeRemoteShutdownPrivilege	2088	wmic.exe
Token: SeUndockPrivilege	2088	wmic.exe
Token: SeManageVolumePrivilege	2088	wmic.exe
Token: 33	2088	wmic.exe
Token: 34	2088	wmic.exe
Token: 35	2088	wmic.exe
Token: SeIncreaseQuotaPrivilege	2088	wmic.exe
Token: SeSecurityPrivilege	2088	wmic.exe
Token: SeTakeOwnershipPrivilege	2088	wmic.exe
Token: SeLoadDriverPrivilege	2088	wmic.exe
Token: SeSystemProfilePrivilege	2088	wmic.exe
Token: SeSystemtimePrivilege	2088	wmic.exe
Token: SeProfSingleProcessPrivilege	2088	wmic.exe
Token: SeIncBasePriorityPrivilege	2088	wmic.exe
Token: SeCreatePagefilePrivilege	2088	wmic.exe
Token: SeBackupPrivilege	2088	wmic.exe
Token: SeRestorePrivilege	2088	wmic.exe
Token: SeShutdownPrivilege	2088	wmic.exe
Token: SeDebugPrivilege	2088	wmic.exe
Token: SeSystemEnvironmentPrivilege	2088	wmic.exe
Token: SeRemoteShutdownPrivilege	2088	wmic.exe
Token: SeUndockPrivilege	2088	wmic.exe
Token: SeManageVolumePrivilege	2088	wmic.exe
Token: 33	2088	wmic.exe
Token: 34	2088	wmic.exe
Token: 35	2088	wmic.exe
Token: SeIncreaseQuotaPrivilege	700	wmic.exe
Token: SeSecurityPrivilege	700	wmic.exe
Token: SeTakeOwnershipPrivilege	700	wmic.exe
Token: SeLoadDriverPrivilege	700	wmic.exe
Token: SeSystemProfilePrivilege	700	wmic.exe
Token: SeSystemtimePrivilege	700	wmic.exe
Token: SeProfSingleProcessPrivilege	700	wmic.exe
Token: SeIncBasePriorityPrivilege	700	wmic.exe
Token: SeCreatePagefilePrivilege	700	wmic.exe
Token: SeBackupPrivilege	700	wmic.exe
Token: SeRestorePrivilege	700	wmic.exe
Token: SeShutdownPrivilege	700	wmic.exe
Token: SeDebugPrivilege	700	wmic.exe
Token: SeSystemEnvironmentPrivilege	700	wmic.exe
Token: SeRemoteShutdownPrivilege	700	wmic.exe
Token: SeUndockPrivilege	700	wmic.exe
Token: SeManageVolumePrivilege	700	wmic.exe
Token: 33	700	wmic.exe
Token: 34	700	wmic.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 2544 wrote to memory of 584	2544	nursultan.exe	30
PID 2544 wrote to memory of 584	2544	nursultan.exe	30
PID 2544 wrote to memory of 584	2544	nursultan.exe	30
PID 2544 wrote to memory of 2716	2544	nursultan.exe	32
PID 2544 wrote to memory of 2716	2544	nursultan.exe	32
PID 2544 wrote to memory of 2716	2544	nursultan.exe	32
PID 2544 wrote to memory of 1528	2544	nursultan.exe	34
PID 2544 wrote to memory of 1528	2544	nursultan.exe	34
PID 2544 wrote to memory of 1528	2544	nursultan.exe	34
PID 2544 wrote to memory of 1744	2544	nursultan.exe	36
PID 2544 wrote to memory of 1744	2544	nursultan.exe	36
PID 2544 wrote to memory of 1744	2544	nursultan.exe	36
PID 2544 wrote to memory of 2088	2544	nursultan.exe	38
PID 2544 wrote to memory of 2088	2544	nursultan.exe	38
PID 2544 wrote to memory of 2088	2544	nursultan.exe	38
PID 2544 wrote to memory of 700	2544	nursultan.exe	41
PID 2544 wrote to memory of 700	2544	nursultan.exe	41
PID 2544 wrote to memory of 700	2544	nursultan.exe	41
PID 2544 wrote to memory of 1396	2544	nursultan.exe	43
PID 2544 wrote to memory of 1396	2544	nursultan.exe	43
PID 2544 wrote to memory of 1396	2544	nursultan.exe	43
PID 2544 wrote to memory of 980	2544	nursultan.exe	45
PID 2544 wrote to memory of 980	2544	nursultan.exe	45
PID 2544 wrote to memory of 980	2544	nursultan.exe	45
PID 2544 wrote to memory of 1648	2544	nursultan.exe	47
PID 2544 wrote to memory of 1648	2544	nursultan.exe	47
PID 2544 wrote to memory of 1648	2544	nursultan.exe	47

C:\Users\Admin\AppData\Local\Temp\nursultan.exe
"C:\Users\Admin\AppData\Local\Temp\nursultan.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2544
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\nursultan.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:584
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2716
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1528
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1744
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2088
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:700
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:1396
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:980
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:1648

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
7bda582a8c2d35c9f83f13a0d6dc9561

SHA1
e274fca42eb7285c6dd9aeea4270f0b12f11df58

SHA256
3d77c7d829e8849dd9aa6bf874de3e916fea04dfab3f0c38fbd01dcffe1def18

SHA512
1d3c26bab1cb8b19371e3719b3dae555d855f166e96cb8bbfa3e9e36088a174eef523e413b6847b9dbce59e8d65aa0af48212d2e285405cb9850255ae0140a31

Download Submit
memory/584-16-0x00000000026D0000-0x0000000002750000-memory.dmp

Filesize
512KB

Download
memory/584-13-0x00000000026D0000-0x0000000002750000-memory.dmp

Filesize
512KB

Download
memory/584-15-0x000007FEED350000-0x000007FEEDCED000-memory.dmp

Filesize
9.6MB

Download
memory/584-9-0x000000001B2E0000-0x000000001B5C2000-memory.dmp

Filesize
2.9MB

Download
memory/584-11-0x0000000001DF0000-0x0000000001DF8000-memory.dmp

Filesize
32KB

Download
memory/584-10-0x000007FEED350000-0x000007FEEDCED000-memory.dmp

Filesize
9.6MB

Download
memory/584-12-0x00000000026D0000-0x0000000002750000-memory.dmp

Filesize
512KB

Download
memory/584-17-0x000007FEED350000-0x000007FEEDCED000-memory.dmp

Filesize
9.6MB

Download
memory/584-14-0x00000000026D0000-0x0000000002750000-memory.dmp

Filesize
512KB

Download
memory/980-81-0x000007FEED350000-0x000007FEEDCED000-memory.dmp

Filesize
9.6MB

Download
memory/980-78-0x000007FEED350000-0x000007FEEDCED000-memory.dmp

Filesize
9.6MB

Download
memory/980-79-0x0000000002460000-0x00000000024E0000-memory.dmp

Filesize
512KB

Download
memory/980-80-0x0000000002460000-0x00000000024E0000-memory.dmp

Filesize
512KB

Download
memory/980-77-0x0000000002460000-0x00000000024E0000-memory.dmp

Filesize
512KB

Download
memory/980-76-0x000007FEED350000-0x000007FEEDCED000-memory.dmp

Filesize
9.6MB

Download
memory/980-75-0x0000000002630000-0x0000000002638000-memory.dmp

Filesize
32KB

Download
memory/1528-47-0x000007FEED350000-0x000007FEEDCED000-memory.dmp

Filesize
9.6MB

Download
memory/1528-52-0x00000000024C0000-0x0000000002540000-memory.dmp

Filesize
512KB

Download
memory/1528-50-0x00000000024C0000-0x0000000002540000-memory.dmp

Filesize
512KB

Download
memory/1528-51-0x00000000024C0000-0x0000000002540000-memory.dmp

Filesize
512KB

Download
memory/1528-49-0x000007FEED350000-0x000007FEEDCED000-memory.dmp

Filesize
9.6MB

Download
memory/1528-48-0x00000000024C0000-0x0000000002540000-memory.dmp

Filesize
512KB

Download
memory/1528-53-0x000007FEED350000-0x000007FEEDCED000-memory.dmp

Filesize
9.6MB

Download
memory/1744-62-0x0000000002980000-0x0000000002A00000-memory.dmp

Filesize
512KB

Download
memory/1744-64-0x000000000298B000-0x00000000029F2000-memory.dmp

Filesize
412KB

Download
memory/1744-65-0x000007FEEC9B0000-0x000007FEED34D000-memory.dmp

Filesize
9.6MB

Download
memory/1744-59-0x000007FEEC9B0000-0x000007FEED34D000-memory.dmp

Filesize
9.6MB

Download
memory/1744-60-0x0000000002980000-0x0000000002A00000-memory.dmp

Filesize
512KB

Download
memory/1744-61-0x000007FEEC9B0000-0x000007FEED34D000-memory.dmp

Filesize
9.6MB

Download
memory/1744-63-0x0000000002980000-0x0000000002A00000-memory.dmp

Filesize
512KB

Download
memory/2544-85-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download
memory/2544-1-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download
memory/2544-2-0x000000001A980000-0x000000001AA00000-memory.dmp

Filesize
512KB

Download
memory/2544-3-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

Filesize
9.9MB

Download
memory/2544-4-0x000000001A980000-0x000000001AA00000-memory.dmp

Filesize
512KB

Download
memory/2544-0-0x0000000000020000-0x0000000000060000-memory.dmp

Filesize
256KB

Download
memory/2716-27-0x000007FEEC9B0000-0x000007FEED34D000-memory.dmp

Filesize
9.6MB

Download
memory/2716-26-0x0000000002560000-0x00000000025E0000-memory.dmp

Filesize
512KB

Download
memory/2716-24-0x0000000002530000-0x0000000002538000-memory.dmp

Filesize
32KB

Download
memory/2716-25-0x000007FEEC9B0000-0x000007FEED34D000-memory.dmp

Filesize
9.6MB

Download
memory/2716-23-0x000000001B280000-0x000000001B562000-memory.dmp

Filesize
2.9MB

Download
memory/2716-32-0x000007FEEC9B0000-0x000007FEED34D000-memory.dmp

Filesize
9.6MB

Download
memory/2716-29-0x0000000002560000-0x00000000025E0000-memory.dmp

Filesize
512KB

Download
memory/2716-28-0x0000000002560000-0x00000000025E0000-memory.dmp

Filesize
512KB

Download
memory/2716-30-0x0000000002560000-0x00000000025E0000-memory.dmp

Filesize
512KB

Download
memory/2716-31-0x0000000002560000-0x00000000025E0000-memory.dmp

Filesize
512KB

Download