umbral | 0f10ed177734b40d0ca45eed258f8c3ca585323e32db8f3cab7387b61de0e679

Analysis

max time kernel
117s
max time network
118s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
14-05-2024 08:37

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General

Target

New_Project_1 (2).exe
Size

486KB
MD5

330f592f3a03c5e2c2ed4593d227f1a8
SHA1

55957a8e8d405569c655923dd9414c4ec6c45a0d
SHA256

0f10ed177734b40d0ca45eed258f8c3ca585323e32db8f3cab7387b61de0e679
SHA512

497f9308a49eb1e9451675f447c5774cbaf267dd77b69e1ab494609feca17a20224ac707e54abcb090ee90e1e8187e9fa681c200bcec97ac1bc36b0ce38d15c2
SSDEEP

12288:cWjF6EjvVYEaZ1hJcSx3ThB6xL3s7H4sn4/OxJrinEXL/sT:p68aZ1hlxlay5HdCuL

Score

10^/10

umbral xworm execution persistence rat stealer trojan

Malware Config

Extracted

Family

umbral

https://discord.com/api/webhooks/1239139511359897700/no9NKxq5Y0T8pWT8XT2sOPqegxvgFUODOTwovbkwjhDGUE5-JgfcJdGO-V3YrtPZiVPB

Extracted

Family

xworm

reference-elliott.gl.at.ply.gg:37420

Attributes

Install_directory
%Userprofile%
install_file
svchost.exe

Signatures

Detect Umbral payload 3 IoCs

resource	yara_rule
behavioral1/memory/2980-0-0x0000000000400000-0x000000000047C000-memory.dmp	family_umbral
behavioral1/files/0x0037000000014b4c-9.dat	family_umbral
behavioral1/memory/2572-15-0x00000000009D0000-0x0000000000A10000-memory.dmp	family_umbral

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2980-0-0x0000000000400000-0x000000000047C000-memory.dmp	family_xworm
behavioral1/files/0x000c000000012674-3.dat	family_xworm
behavioral1/memory/2932-14-0x0000000001350000-0x000000000136C000-memory.dmp	family_xworm
behavioral1/memory/1916-46-0x00000000012C0000-0x00000000012DC000-memory.dmp	family_xworm

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
300	powershell.exe
2724	powershell.exe
1676	powershell.exe
1732	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	1.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	1.exe

Executes dropped EXE 3 IoCs

pid	Process
2932	1.exe
2572	2.exe
1916	svchost.exe

Loads dropped DLL 2 IoCs

pid	Process
2980	New_Project_1 (2).exe
2980	New_Project_1 (2).exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3452737119-3959686427-228443150-1000\Software\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\svchost.exe"	1.exe

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
7	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
632	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
1872	timeout.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
300	powershell.exe
2724	powershell.exe
1676	powershell.exe
1732	powershell.exe
2932	1.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2932	1.exe
Token: SeDebugPrivilege	2572	2.exe
Token: SeIncreaseQuotaPrivilege	2448	wmic.exe
Token: SeSecurityPrivilege	2448	wmic.exe
Token: SeTakeOwnershipPrivilege	2448	wmic.exe
Token: SeLoadDriverPrivilege	2448	wmic.exe
Token: SeSystemProfilePrivilege	2448	wmic.exe
Token: SeSystemtimePrivilege	2448	wmic.exe
Token: SeProfSingleProcessPrivilege	2448	wmic.exe
Token: SeIncBasePriorityPrivilege	2448	wmic.exe
Token: SeCreatePagefilePrivilege	2448	wmic.exe
Token: SeBackupPrivilege	2448	wmic.exe
Token: SeRestorePrivilege	2448	wmic.exe
Token: SeShutdownPrivilege	2448	wmic.exe
Token: SeDebugPrivilege	2448	wmic.exe
Token: SeSystemEnvironmentPrivilege	2448	wmic.exe
Token: SeRemoteShutdownPrivilege	2448	wmic.exe
Token: SeUndockPrivilege	2448	wmic.exe
Token: SeManageVolumePrivilege	2448	wmic.exe
Token: 33	2448	wmic.exe
Token: 34	2448	wmic.exe
Token: 35	2448	wmic.exe
Token: SeIncreaseQuotaPrivilege	2448	wmic.exe
Token: SeSecurityPrivilege	2448	wmic.exe
Token: SeTakeOwnershipPrivilege	2448	wmic.exe
Token: SeLoadDriverPrivilege	2448	wmic.exe
Token: SeSystemProfilePrivilege	2448	wmic.exe
Token: SeSystemtimePrivilege	2448	wmic.exe
Token: SeProfSingleProcessPrivilege	2448	wmic.exe
Token: SeIncBasePriorityPrivilege	2448	wmic.exe
Token: SeCreatePagefilePrivilege	2448	wmic.exe
Token: SeBackupPrivilege	2448	wmic.exe
Token: SeRestorePrivilege	2448	wmic.exe
Token: SeShutdownPrivilege	2448	wmic.exe
Token: SeDebugPrivilege	2448	wmic.exe
Token: SeSystemEnvironmentPrivilege	2448	wmic.exe
Token: SeRemoteShutdownPrivilege	2448	wmic.exe
Token: SeUndockPrivilege	2448	wmic.exe
Token: SeManageVolumePrivilege	2448	wmic.exe
Token: 33	2448	wmic.exe
Token: 34	2448	wmic.exe
Token: 35	2448	wmic.exe
Token: SeDebugPrivilege	300	powershell.exe
Token: SeDebugPrivilege	2724	powershell.exe
Token: SeDebugPrivilege	1676	powershell.exe
Token: SeDebugPrivilege	1732	powershell.exe
Token: SeDebugPrivilege	2932	1.exe
Token: SeDebugPrivilege	1916	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2932	1.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 2980 wrote to memory of 2932	2980	New_Project_1 (2).exe	28
PID 2980 wrote to memory of 2932	2980	New_Project_1 (2).exe	28
PID 2980 wrote to memory of 2932	2980	New_Project_1 (2).exe	28
PID 2980 wrote to memory of 2932	2980	New_Project_1 (2).exe	28
PID 2980 wrote to memory of 2572	2980	New_Project_1 (2).exe	29
PID 2980 wrote to memory of 2572	2980	New_Project_1 (2).exe	29
PID 2980 wrote to memory of 2572	2980	New_Project_1 (2).exe	29
PID 2980 wrote to memory of 2572	2980	New_Project_1 (2).exe	29
PID 2572 wrote to memory of 2448	2572	2.exe	30
PID 2572 wrote to memory of 2448	2572	2.exe	30
PID 2572 wrote to memory of 2448	2572	2.exe	30
PID 2932 wrote to memory of 300	2932	1.exe	33
PID 2932 wrote to memory of 300	2932	1.exe	33
PID 2932 wrote to memory of 300	2932	1.exe	33
PID 2932 wrote to memory of 2724	2932	1.exe	35
PID 2932 wrote to memory of 2724	2932	1.exe	35
PID 2932 wrote to memory of 2724	2932	1.exe	35
PID 2932 wrote to memory of 1676	2932	1.exe	37
PID 2932 wrote to memory of 1676	2932	1.exe	37
PID 2932 wrote to memory of 1676	2932	1.exe	37
PID 2932 wrote to memory of 1732	2932	1.exe	39
PID 2932 wrote to memory of 1732	2932	1.exe	39
PID 2932 wrote to memory of 1732	2932	1.exe	39
PID 2932 wrote to memory of 632	2932	1.exe	41
PID 2932 wrote to memory of 632	2932	1.exe	41
PID 2932 wrote to memory of 632	2932	1.exe	41
PID 2868 wrote to memory of 1916	2868	taskeng.exe	44
PID 2868 wrote to memory of 1916	2868	taskeng.exe	44
PID 2868 wrote to memory of 1916	2868	taskeng.exe	44
PID 2932 wrote to memory of 1340	2932	1.exe	47
PID 2932 wrote to memory of 1340	2932	1.exe	47
PID 2932 wrote to memory of 1340	2932	1.exe	47
PID 2932 wrote to memory of 1948	2932	1.exe	49
PID 2932 wrote to memory of 1948	2932	1.exe	49
PID 2932 wrote to memory of 1948	2932	1.exe	49
PID 1948 wrote to memory of 1872	1948	cmd.exe	51
PID 1948 wrote to memory of 1872	1948	cmd.exe	51
PID 1948 wrote to memory of 1872	1948	cmd.exe	51

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\New_Project_1 (2).exe
"C:\Users\Admin\AppData\Local\Temp\New_Project_1 (2).exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2980
- C:\Users\Admin\AppData\Local\Temp\1.exe
  "C:\Users\Admin\AppData\Local\Temp\1.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2932
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\1.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:300
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '1.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2724
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1676
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1732
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "svchost" /tr "C:\Users\Admin\svchost.exe"
    3⤵
    - Creates scheduled task(s)
    PID:632
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "svchost"
    3⤵
    PID:1340
- - C:\Windows\system32\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpD5C6.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1948
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:1872
- C:\Users\Admin\AppData\Local\Temp\2.exe
  "C:\Users\Admin\AppData\Local\Temp\2.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2572
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2448

C:\Windows\system32\taskeng.exe
taskeng.exe {C0B98183-B1B1-41B9-84EC-008E35F7FE8C} S-1-5-21-3452737119-3959686427-228443150-1000:QGTQZTRE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2868
- C:\Users\Admin\svchost.exe
  C:\Users\Admin\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1916

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Defense Evasion

Modify Registry

T1112

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\Temp\tmpD5C6.tmp.bat

Filesize
153B

MD5
ab84e99b80720507c7d0d97723eab4a3

SHA1
495b529a471458545f89b0c175aab8284963d03d

SHA256
7aec2d0153350974fe7a55626279c0a595383d8323f42e774c0b447f50b9269f

SHA512
04c1380660b046752a25836fca7df0be6a93945a125adb98c6a887eb9c1bf21e1bb5c2c4432a66b4c33e7bd173893613a58456131c3d807e7a7f0131abe67e8f

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

Filesize
7KB

MD5
48cbd7f0abcc2000c9d9033d084abace

SHA1
fa582725e05f9800c2f0269f066bcc7169cbf8d9

SHA256
d497e05f2c6339d8b1bb5b26c548133ada1372ba04cf39061293c8eb31b92aa8

SHA512
6a9223da4e44eb229e681c7581f433e9128b32e2c86c99596be1604d3cd2a3cc64d19dbe417d55441c7c71203babeffadf213a0bf7b715505d2976deef027584

Download Submit
\Users\Admin\AppData\Local\Temp\1.exe

Filesize
88KB

MD5
4e4ffd6981f1d7df1e06e02c7a52e86a

SHA1
970d227a122a826f587fb49c694a422ec6aff1e0

SHA256
353010e5cbdfb234aadfcb40b517b51b24bbac81b64d794d5d8f8b1cd0cd6031

SHA512
1f75401fe015416453119bb92ea46c71412f342fe4bf1170bc2655a1c4f1fb4344bdff64df8dfd54f8203b30445225a70f12790432d3b59693e96de2fa5750ec

Download Submit
\Users\Admin\AppData\Local\Temp\2.exe

Filesize
230KB

MD5
8068d967a754039c953d677ed75caa65

SHA1
c6ca62d0e3f84f4018546cdf40b14ac80b06af95

SHA256
b2811334ba1ec945f7f2f1b1976e72dd634a4cf8b5679ceb4c90816d5b646b11

SHA512
8f8f9b0c50f3178daa1df6ce16755c7a0de24872a344fe6b93d1a9b11cfad2faa1ed5ad58c6ac9904b889188d8efaba2d51e4240e7a813fffe6878ec8970954c

Download Submit
memory/300-20-0x000000001B750000-0x000000001BA32000-memory.dmp

Filesize
2.9MB

Download
memory/300-21-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download
memory/1916-46-0x00000000012C0000-0x00000000012DC000-memory.dmp

Filesize
112KB

Download
memory/2572-15-0x00000000009D0000-0x0000000000A10000-memory.dmp

Filesize
256KB

Download
memory/2724-27-0x000000001B730000-0x000000001BA12000-memory.dmp

Filesize
2.9MB

Download
memory/2724-28-0x0000000002390000-0x0000000002398000-memory.dmp

Filesize
32KB

Download
memory/2932-14-0x0000000001350000-0x000000000136C000-memory.dmp

Filesize
112KB

Download
memory/2980-0-0x0000000000400000-0x000000000047C000-memory.dmp

Filesize
496KB

Download