umbral | 4481b5d3ba129725c46aa14c9366b0dbd0bc1adac7f82e5de7fd8b323454ea39

Analysis

max time kernel
149s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
24-04-2024 19:35

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General

Target

Saransk.exe
Size

229KB
MD5

2280a102c1f09f71322017ce524b6660
SHA1

8170de1bbde70f1c89a447caf95f8e7897ca2dcd
SHA256

4481b5d3ba129725c46aa14c9366b0dbd0bc1adac7f82e5de7fd8b323454ea39
SHA512

17969475dfa5bcfc2aff4b53c135ed8422b6990c6c5f43405e669a018b1932fe4cf20f74f78d26560475393c374963f54b53cce26f490bf56d45a359a487b08f
SSDEEP

6144:lloZM9rIkd8g+EtXHkv/iD4P2cYecjfUv1gevPes0b8e1myTi:noZOL+EP8P2cYecjfUv1gevPehX+

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/2848-0-0x0000029416430000-0x0000029416470000-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	Saransk.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
31	discord.com
32	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
20	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
4972	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2348	PING.EXE

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
4040	powershell.exe
4040	powershell.exe
2560	powershell.exe
2560	powershell.exe
2108	powershell.exe
2108	powershell.exe
888	powershell.exe
888	powershell.exe
2592	powershell.exe
2592	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2848	Saransk.exe
Token: SeDebugPrivilege	4040	powershell.exe
Token: SeDebugPrivilege	2560	powershell.exe
Token: SeDebugPrivilege	2108	powershell.exe
Token: SeDebugPrivilege	888	powershell.exe
Token: SeIncreaseQuotaPrivilege	2652	wmic.exe
Token: SeSecurityPrivilege	2652	wmic.exe
Token: SeTakeOwnershipPrivilege	2652	wmic.exe
Token: SeLoadDriverPrivilege	2652	wmic.exe
Token: SeSystemProfilePrivilege	2652	wmic.exe
Token: SeSystemtimePrivilege	2652	wmic.exe
Token: SeProfSingleProcessPrivilege	2652	wmic.exe
Token: SeIncBasePriorityPrivilege	2652	wmic.exe
Token: SeCreatePagefilePrivilege	2652	wmic.exe
Token: SeBackupPrivilege	2652	wmic.exe
Token: SeRestorePrivilege	2652	wmic.exe
Token: SeShutdownPrivilege	2652	wmic.exe
Token: SeDebugPrivilege	2652	wmic.exe
Token: SeSystemEnvironmentPrivilege	2652	wmic.exe
Token: SeRemoteShutdownPrivilege	2652	wmic.exe
Token: SeUndockPrivilege	2652	wmic.exe
Token: SeManageVolumePrivilege	2652	wmic.exe
Token: 33	2652	wmic.exe
Token: 34	2652	wmic.exe
Token: 35	2652	wmic.exe
Token: 36	2652	wmic.exe
Token: SeIncreaseQuotaPrivilege	2652	wmic.exe
Token: SeSecurityPrivilege	2652	wmic.exe
Token: SeTakeOwnershipPrivilege	2652	wmic.exe
Token: SeLoadDriverPrivilege	2652	wmic.exe
Token: SeSystemProfilePrivilege	2652	wmic.exe
Token: SeSystemtimePrivilege	2652	wmic.exe
Token: SeProfSingleProcessPrivilege	2652	wmic.exe
Token: SeIncBasePriorityPrivilege	2652	wmic.exe
Token: SeCreatePagefilePrivilege	2652	wmic.exe
Token: SeBackupPrivilege	2652	wmic.exe
Token: SeRestorePrivilege	2652	wmic.exe
Token: SeShutdownPrivilege	2652	wmic.exe
Token: SeDebugPrivilege	2652	wmic.exe
Token: SeSystemEnvironmentPrivilege	2652	wmic.exe
Token: SeRemoteShutdownPrivilege	2652	wmic.exe
Token: SeUndockPrivilege	2652	wmic.exe
Token: SeManageVolumePrivilege	2652	wmic.exe
Token: 33	2652	wmic.exe
Token: 34	2652	wmic.exe
Token: 35	2652	wmic.exe
Token: 36	2652	wmic.exe
Token: SeIncreaseQuotaPrivilege	1904	wmic.exe
Token: SeSecurityPrivilege	1904	wmic.exe
Token: SeTakeOwnershipPrivilege	1904	wmic.exe
Token: SeLoadDriverPrivilege	1904	wmic.exe
Token: SeSystemProfilePrivilege	1904	wmic.exe
Token: SeSystemtimePrivilege	1904	wmic.exe
Token: SeProfSingleProcessPrivilege	1904	wmic.exe
Token: SeIncBasePriorityPrivilege	1904	wmic.exe
Token: SeCreatePagefilePrivilege	1904	wmic.exe
Token: SeBackupPrivilege	1904	wmic.exe
Token: SeRestorePrivilege	1904	wmic.exe
Token: SeShutdownPrivilege	1904	wmic.exe
Token: SeDebugPrivilege	1904	wmic.exe
Token: SeSystemEnvironmentPrivilege	1904	wmic.exe
Token: SeRemoteShutdownPrivilege	1904	wmic.exe
Token: SeUndockPrivilege	1904	wmic.exe
Token: SeManageVolumePrivilege	1904	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2848 wrote to memory of 4228	2848	Saransk.exe	86
PID 2848 wrote to memory of 4228	2848	Saransk.exe	86
PID 2848 wrote to memory of 4040	2848	Saransk.exe	88
PID 2848 wrote to memory of 4040	2848	Saransk.exe	88
PID 2848 wrote to memory of 2560	2848	Saransk.exe	91
PID 2848 wrote to memory of 2560	2848	Saransk.exe	91
PID 2848 wrote to memory of 2108	2848	Saransk.exe	94
PID 2848 wrote to memory of 2108	2848	Saransk.exe	94
PID 2848 wrote to memory of 888	2848	Saransk.exe	96
PID 2848 wrote to memory of 888	2848	Saransk.exe	96
PID 2848 wrote to memory of 2652	2848	Saransk.exe	98
PID 2848 wrote to memory of 2652	2848	Saransk.exe	98
PID 2848 wrote to memory of 1904	2848	Saransk.exe	101
PID 2848 wrote to memory of 1904	2848	Saransk.exe	101
PID 2848 wrote to memory of 4968	2848	Saransk.exe	103
PID 2848 wrote to memory of 4968	2848	Saransk.exe	103
PID 2848 wrote to memory of 2592	2848	Saransk.exe	105
PID 2848 wrote to memory of 2592	2848	Saransk.exe	105
PID 2848 wrote to memory of 4972	2848	Saransk.exe	109
PID 2848 wrote to memory of 4972	2848	Saransk.exe	109
PID 2848 wrote to memory of 4068	2848	Saransk.exe	114
PID 2848 wrote to memory of 4068	2848	Saransk.exe	114
PID 4068 wrote to memory of 2348	4068	cmd.exe	116
PID 4068 wrote to memory of 2348	4068	cmd.exe	116

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
4228	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Saransk.exe
"C:\Users\Admin\AppData\Local\Temp\Saransk.exe"
1⤵
- Drops file in Drivers directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2848
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Saransk.exe"
  2⤵
  - Views/modifies file attributes
  PID:4228
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Saransk.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4040
- 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:2560
- 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:2108
- 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:888
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2652
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1904
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:4968
- 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:2592
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:4972
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Saransk.exe" && pause
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4068
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:2348

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

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\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
1KB

MD5
ac057a92f4b62d8880169af0693ef5b2

SHA1
66e7c7834c5dae5cec863ccd69403150d05841f4

SHA256
7cef55990e8e6cfe07e1965b303e79ac562cdc128ab82edf480d9873f72bb3ed

SHA512
d525f47da9e61fc87e55aca6b34e776be3ed081b719bbbb5256705a6afe5fdd4c16d5ee595af13994e2718f789f5fd32830331347d97b029c031c9dfe30c7f49

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\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
c65738617888921a153bd9b1ef516ee7

SHA1
5245e71ea3c181d76320c857b639272ac9e079b1

SHA256
4640ba4001fd16a593315299cbdd4988dc2c7075820687f1018aac40aca95c26

SHA512
2e2a0ebd93f9d8dd07a7599054bce232683e9add9a35e77b584618040bcfd84a42545352519ec4736cc379002210b6f3ed2d905591c6925c0981b0392b495bfa

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

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vnaxvysp.ui0.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/888-68-0x00007FFDA5D70000-0x00007FFDA6831000-memory.dmp

Filesize
10.8MB

Download
memory/888-69-0x000002BB40990000-0x000002BB409A0000-memory.dmp

Filesize
64KB

Download
memory/888-84-0x00007FFDA5D70000-0x00007FFDA6831000-memory.dmp

Filesize
10.8MB

Download
memory/888-82-0x000002BB40990000-0x000002BB409A0000-memory.dmp

Filesize
64KB

Download
memory/888-71-0x000002BB40990000-0x000002BB409A0000-memory.dmp

Filesize
64KB

Download
memory/2108-67-0x00007FFDA5D70000-0x00007FFDA6831000-memory.dmp

Filesize
10.8MB

Download
memory/2108-65-0x000001E1A5D60000-0x000001E1A5D70000-memory.dmp

Filesize
64KB

Download
memory/2108-40-0x00007FFDA5D70000-0x00007FFDA6831000-memory.dmp

Filesize
10.8MB

Download
memory/2108-42-0x000001E1A5D60000-0x000001E1A5D70000-memory.dmp

Filesize
64KB

Download
memory/2108-41-0x000001E1A5D60000-0x000001E1A5D70000-memory.dmp

Filesize
64KB

Download
memory/2560-19-0x00007FFDA5D70000-0x00007FFDA6831000-memory.dmp

Filesize
10.8MB

Download
memory/2560-34-0x00007FFDA5D70000-0x00007FFDA6831000-memory.dmp

Filesize
10.8MB

Download
memory/2560-33-0x0000020568540000-0x0000020568550000-memory.dmp

Filesize
64KB

Download
memory/2560-21-0x0000020568540000-0x0000020568550000-memory.dmp

Filesize
64KB

Download
memory/2560-20-0x0000020568540000-0x0000020568550000-memory.dmp

Filesize
64KB

Download
memory/2592-90-0x00007FFDA5D70000-0x00007FFDA6831000-memory.dmp

Filesize
10.8MB

Download
memory/2592-103-0x00007FFDA5D70000-0x00007FFDA6831000-memory.dmp

Filesize
10.8MB

Download
memory/2592-91-0x0000024947B20000-0x0000024947B30000-memory.dmp

Filesize
64KB

Download
memory/2848-70-0x00007FFDA5D70000-0x00007FFDA6831000-memory.dmp

Filesize
10.8MB

Download
memory/2848-38-0x0000029418130000-0x0000029418180000-memory.dmp

Filesize
320KB

Download
memory/2848-108-0x00007FFDA5D70000-0x00007FFDA6831000-memory.dmp

Filesize
10.8MB

Download
memory/2848-39-0x0000029418090000-0x00000294180AE000-memory.dmp

Filesize
120KB

Download
memory/2848-37-0x0000029430BD0000-0x0000029430C46000-memory.dmp

Filesize
472KB

Download
memory/2848-1-0x00007FFDA5D70000-0x00007FFDA6831000-memory.dmp

Filesize
10.8MB

Download
memory/2848-2-0x0000029430AC0000-0x0000029430AD0000-memory.dmp

Filesize
64KB

Download
memory/2848-87-0x0000029430AA0000-0x0000029430AB2000-memory.dmp

Filesize
72KB

Download
memory/2848-86-0x00000294180E0000-0x00000294180EA000-memory.dmp

Filesize
40KB

Download
memory/2848-0-0x0000029416430000-0x0000029416470000-memory.dmp

Filesize
256KB

Download
memory/4040-17-0x00007FFDA5D70000-0x00007FFDA6831000-memory.dmp

Filesize
10.8MB

Download
memory/4040-8-0x000001E0DE460000-0x000001E0DE482000-memory.dmp

Filesize
136KB

Download
memory/4040-13-0x00007FFDA5D70000-0x00007FFDA6831000-memory.dmp

Filesize
10.8MB

Download
memory/4040-14-0x000001E0C5CC0000-0x000001E0C5CD0000-memory.dmp

Filesize
64KB

Download