umbral | 0f10ed177734b40d0ca45eed258f8c3ca585323e32db8f3cab7387b61de0e679

Analysis

max time kernel
117s
max time network
125s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
13-05-2024 17:32

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General

Target

New_Project_1.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/1736-0-0x0000000000400000-0x000000000047C000-memory.dmp	family_umbral
behavioral1/files/0x0009000000016a29-11.dat	family_umbral
behavioral1/memory/2328-15-0x00000000010B0000-0x00000000010F0000-memory.dmp	family_umbral

Detect Xworm Payload 3 IoCs

resource	yara_rule
behavioral1/memory/1736-0-0x0000000000400000-0x000000000047C000-memory.dmp	family_xworm
behavioral1/files/0x0009000000016176-7.dat	family_xworm
behavioral1/memory/2164-12-0x0000000000F40000-0x0000000000F5C000-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
764	powershell.exe
852	powershell.exe
2520	powershell.exe
1200	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 2 IoCs

pid	Process
2164	1.exe
2328	2.exe

Loads dropped DLL 2 IoCs

pid	Process
1736	New_Project_1.exe
1736	New_Project_1.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-1-5-21-3627615824-4061627003-3019543961-1000\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
14	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
2252	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2292	timeout.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
764	powershell.exe
852	powershell.exe
2520	powershell.exe
1200	powershell.exe
2164	1.exe

Suspicious use of AdjustPrivilegeToken 47 IoCs

description	pid	Process
Token: SeDebugPrivilege	2164	1.exe
Token: SeDebugPrivilege	2328	2.exe
Token: SeIncreaseQuotaPrivilege	2888	wmic.exe
Token: SeSecurityPrivilege	2888	wmic.exe
Token: SeTakeOwnershipPrivilege	2888	wmic.exe
Token: SeLoadDriverPrivilege	2888	wmic.exe
Token: SeSystemProfilePrivilege	2888	wmic.exe
Token: SeSystemtimePrivilege	2888	wmic.exe
Token: SeProfSingleProcessPrivilege	2888	wmic.exe
Token: SeIncBasePriorityPrivilege	2888	wmic.exe
Token: SeCreatePagefilePrivilege	2888	wmic.exe
Token: SeBackupPrivilege	2888	wmic.exe
Token: SeRestorePrivilege	2888	wmic.exe
Token: SeShutdownPrivilege	2888	wmic.exe
Token: SeDebugPrivilege	2888	wmic.exe
Token: SeSystemEnvironmentPrivilege	2888	wmic.exe
Token: SeRemoteShutdownPrivilege	2888	wmic.exe
Token: SeUndockPrivilege	2888	wmic.exe
Token: SeManageVolumePrivilege	2888	wmic.exe
Token: 33	2888	wmic.exe
Token: 34	2888	wmic.exe
Token: 35	2888	wmic.exe
Token: SeIncreaseQuotaPrivilege	2888	wmic.exe
Token: SeSecurityPrivilege	2888	wmic.exe
Token: SeTakeOwnershipPrivilege	2888	wmic.exe
Token: SeLoadDriverPrivilege	2888	wmic.exe
Token: SeSystemProfilePrivilege	2888	wmic.exe
Token: SeSystemtimePrivilege	2888	wmic.exe
Token: SeProfSingleProcessPrivilege	2888	wmic.exe
Token: SeIncBasePriorityPrivilege	2888	wmic.exe
Token: SeCreatePagefilePrivilege	2888	wmic.exe
Token: SeBackupPrivilege	2888	wmic.exe
Token: SeRestorePrivilege	2888	wmic.exe
Token: SeShutdownPrivilege	2888	wmic.exe
Token: SeDebugPrivilege	2888	wmic.exe
Token: SeSystemEnvironmentPrivilege	2888	wmic.exe
Token: SeRemoteShutdownPrivilege	2888	wmic.exe
Token: SeUndockPrivilege	2888	wmic.exe
Token: SeManageVolumePrivilege	2888	wmic.exe
Token: 33	2888	wmic.exe
Token: 34	2888	wmic.exe
Token: 35	2888	wmic.exe
Token: SeDebugPrivilege	764	powershell.exe
Token: SeDebugPrivilege	852	powershell.exe
Token: SeDebugPrivilege	2520	powershell.exe
Token: SeDebugPrivilege	1200	powershell.exe
Token: SeDebugPrivilege	2164	1.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2164	1.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1736 wrote to memory of 2164	1736	New_Project_1.exe	28
PID 1736 wrote to memory of 2164	1736	New_Project_1.exe	28
PID 1736 wrote to memory of 2164	1736	New_Project_1.exe	28
PID 1736 wrote to memory of 2164	1736	New_Project_1.exe	28
PID 1736 wrote to memory of 2328	1736	New_Project_1.exe	29
PID 1736 wrote to memory of 2328	1736	New_Project_1.exe	29
PID 1736 wrote to memory of 2328	1736	New_Project_1.exe	29
PID 1736 wrote to memory of 2328	1736	New_Project_1.exe	29
PID 2328 wrote to memory of 2888	2328	2.exe	31
PID 2328 wrote to memory of 2888	2328	2.exe	31
PID 2328 wrote to memory of 2888	2328	2.exe	31
PID 2164 wrote to memory of 764	2164	1.exe	33
PID 2164 wrote to memory of 764	2164	1.exe	33
PID 2164 wrote to memory of 764	2164	1.exe	33
PID 2164 wrote to memory of 852	2164	1.exe	35
PID 2164 wrote to memory of 852	2164	1.exe	35
PID 2164 wrote to memory of 852	2164	1.exe	35
PID 2164 wrote to memory of 2520	2164	1.exe	37
PID 2164 wrote to memory of 2520	2164	1.exe	37
PID 2164 wrote to memory of 2520	2164	1.exe	37
PID 2164 wrote to memory of 1200	2164	1.exe	39
PID 2164 wrote to memory of 1200	2164	1.exe	39
PID 2164 wrote to memory of 1200	2164	1.exe	39
PID 2164 wrote to memory of 2252	2164	1.exe	41
PID 2164 wrote to memory of 2252	2164	1.exe	41
PID 2164 wrote to memory of 2252	2164	1.exe	41
PID 2164 wrote to memory of 2404	2164	1.exe	43
PID 2164 wrote to memory of 2404	2164	1.exe	43
PID 2164 wrote to memory of 2404	2164	1.exe	43
PID 2164 wrote to memory of 1296	2164	1.exe	45
PID 2164 wrote to memory of 1296	2164	1.exe	45
PID 2164 wrote to memory of 1296	2164	1.exe	45
PID 1296 wrote to memory of 2292	1296	cmd.exe	47
PID 1296 wrote to memory of 2292	1296	cmd.exe	47
PID 1296 wrote to memory of 2292	1296	cmd.exe	47

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.exe
"C:\Users\Admin\AppData\Local\Temp\New_Project_1.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1736
- 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:2164
- - 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:764
- - 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:852
- - 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:2520
- - 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:1200
- - 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:2252
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "svchost"
    3⤵
    PID:2404
- - C:\Windows\system32\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA766.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1296
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:2292
- 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:2328
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2888

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\1.exe

Filesize
88KB

MD5
4e4ffd6981f1d7df1e06e02c7a52e86a

SHA1
970d227a122a826f587fb49c694a422ec6aff1e0

SHA256
353010e5cbdfb234aadfcb40b517b51b24bbac81b64d794d5d8f8b1cd0cd6031

SHA512
1f75401fe015416453119bb92ea46c71412f342fe4bf1170bc2655a1c4f1fb4344bdff64df8dfd54f8203b30445225a70f12790432d3b59693e96de2fa5750ec

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

Filesize
230KB

MD5
8068d967a754039c953d677ed75caa65

SHA1
c6ca62d0e3f84f4018546cdf40b14ac80b06af95

SHA256
b2811334ba1ec945f7f2f1b1976e72dd634a4cf8b5679ceb4c90816d5b646b11

SHA512
8f8f9b0c50f3178daa1df6ce16755c7a0de24872a344fe6b93d1a9b11cfad2faa1ed5ad58c6ac9904b889188d8efaba2d51e4240e7a813fffe6878ec8970954c

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpA766.tmp.bat

Filesize
153B

MD5
e0fb0515f980dc52dd38d44dd83b704d

SHA1
39b53a400375c6a4d07e22185471b1557ee7ad25

SHA256
f84970082773eade81516192f86162adbc006110a55bbb29a46d6b8f69103763

SHA512
4195c39ae9b85b160978445a537546e7d6975c46c9035f065a7924ea8ad84afdab31f755c8daef9f66e45d1240922372b614b47e357b31280a715aa099b8c158

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

Filesize
7KB

MD5
9620af653e6bc1a6fc70d986715e9059

SHA1
dc3072c70f3612c4db20f889c392e6793a87abbe

SHA256
1d857e2be725d86a78ff5bf880805c909ccceebbfb77b3f92af3233f9a32ca34

SHA512
154bf9f955fcbee2f27298297f4f414871d83567cb492a00a28628bd6716c3f1bc35fd097e102defe483d436a2ad9a997ee947abb8d5a23ada2955a81d335506

Download Submit
memory/764-35-0x000000001B610000-0x000000001B8F2000-memory.dmp

Filesize
2.9MB

Download
memory/764-36-0x0000000001F00000-0x0000000001F08000-memory.dmp

Filesize
32KB

Download
memory/852-42-0x000000001B5A0000-0x000000001B882000-memory.dmp

Filesize
2.9MB

Download
memory/852-43-0x0000000002860000-0x0000000002868000-memory.dmp

Filesize
32KB

Download
memory/1736-0-0x0000000000400000-0x000000000047C000-memory.dmp

Filesize
496KB

Download
memory/2164-12-0x0000000000F40000-0x0000000000F5C000-memory.dmp

Filesize
112KB

Download
memory/2328-15-0x00000000010B0000-0x00000000010F0000-memory.dmp

Filesize
256KB

Download