umbral | 0f10ed177734b40d0ca45eed258f8c3ca585323e32db8f3cab7387b61de0e679

Analysis

max time kernel
120s
max time network
126s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
14-05-2024 13:46

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General

Target

New_Project_1 (3).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/1500-0-0x0000000000400000-0x000000000047C000-memory.dmp	family_umbral
behavioral1/files/0x0024000000015c23-9.dat	family_umbral
behavioral1/memory/2772-15-0x0000000000EB0000-0x0000000000EF0000-memory.dmp	family_umbral

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/1500-0-0x0000000000400000-0x000000000047C000-memory.dmp	family_xworm
behavioral1/files/0x000b0000000155e2-3.dat	family_xworm
behavioral1/memory/2536-14-0x0000000000D50000-0x0000000000D6C000-memory.dmp	family_xworm
behavioral1/memory/2212-47-0x00000000010F0000-0x000000000110C000-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
2688	powershell.exe
1936	powershell.exe
392	powershell.exe
572	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
2536	1.exe
2772	2.exe
2212	svchost.exe

Loads dropped DLL 2 IoCs

pid	Process
1500	New_Project_1 (3).exe
1500	New_Project_1 (3).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-1-5-21-330940541-141609230-1670313778-1000\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
2320	schtasks.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
808	timeout.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
392	powershell.exe
572	powershell.exe
2688	powershell.exe
1936	powershell.exe
2536	1.exe

Suspicious use of AdjustPrivilegeToken 48 IoCs

description	pid	Process
Token: SeDebugPrivilege	2536	1.exe
Token: SeDebugPrivilege	2772	2.exe
Token: SeIncreaseQuotaPrivilege	2196	wmic.exe
Token: SeSecurityPrivilege	2196	wmic.exe
Token: SeTakeOwnershipPrivilege	2196	wmic.exe
Token: SeLoadDriverPrivilege	2196	wmic.exe
Token: SeSystemProfilePrivilege	2196	wmic.exe
Token: SeSystemtimePrivilege	2196	wmic.exe
Token: SeProfSingleProcessPrivilege	2196	wmic.exe
Token: SeIncBasePriorityPrivilege	2196	wmic.exe
Token: SeCreatePagefilePrivilege	2196	wmic.exe
Token: SeBackupPrivilege	2196	wmic.exe
Token: SeRestorePrivilege	2196	wmic.exe
Token: SeShutdownPrivilege	2196	wmic.exe
Token: SeDebugPrivilege	2196	wmic.exe
Token: SeSystemEnvironmentPrivilege	2196	wmic.exe
Token: SeRemoteShutdownPrivilege	2196	wmic.exe
Token: SeUndockPrivilege	2196	wmic.exe
Token: SeManageVolumePrivilege	2196	wmic.exe
Token: 33	2196	wmic.exe
Token: 34	2196	wmic.exe
Token: 35	2196	wmic.exe
Token: SeIncreaseQuotaPrivilege	2196	wmic.exe
Token: SeSecurityPrivilege	2196	wmic.exe
Token: SeTakeOwnershipPrivilege	2196	wmic.exe
Token: SeLoadDriverPrivilege	2196	wmic.exe
Token: SeSystemProfilePrivilege	2196	wmic.exe
Token: SeSystemtimePrivilege	2196	wmic.exe
Token: SeProfSingleProcessPrivilege	2196	wmic.exe
Token: SeIncBasePriorityPrivilege	2196	wmic.exe
Token: SeCreatePagefilePrivilege	2196	wmic.exe
Token: SeBackupPrivilege	2196	wmic.exe
Token: SeRestorePrivilege	2196	wmic.exe
Token: SeShutdownPrivilege	2196	wmic.exe
Token: SeDebugPrivilege	2196	wmic.exe
Token: SeSystemEnvironmentPrivilege	2196	wmic.exe
Token: SeRemoteShutdownPrivilege	2196	wmic.exe
Token: SeUndockPrivilege	2196	wmic.exe
Token: SeManageVolumePrivilege	2196	wmic.exe
Token: 33	2196	wmic.exe
Token: 34	2196	wmic.exe
Token: 35	2196	wmic.exe
Token: SeDebugPrivilege	392	powershell.exe
Token: SeDebugPrivilege	572	powershell.exe
Token: SeDebugPrivilege	2688	powershell.exe
Token: SeDebugPrivilege	1936	powershell.exe
Token: SeDebugPrivilege	2536	1.exe
Token: SeDebugPrivilege	2212	svchost.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2536	1.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 1500 wrote to memory of 2536	1500	New_Project_1 (3).exe	28
PID 1500 wrote to memory of 2536	1500	New_Project_1 (3).exe	28
PID 1500 wrote to memory of 2536	1500	New_Project_1 (3).exe	28
PID 1500 wrote to memory of 2536	1500	New_Project_1 (3).exe	28
PID 1500 wrote to memory of 2772	1500	New_Project_1 (3).exe	29
PID 1500 wrote to memory of 2772	1500	New_Project_1 (3).exe	29
PID 1500 wrote to memory of 2772	1500	New_Project_1 (3).exe	29
PID 1500 wrote to memory of 2772	1500	New_Project_1 (3).exe	29
PID 2772 wrote to memory of 2196	2772	2.exe	31
PID 2772 wrote to memory of 2196	2772	2.exe	31
PID 2772 wrote to memory of 2196	2772	2.exe	31
PID 2536 wrote to memory of 392	2536	1.exe	33
PID 2536 wrote to memory of 392	2536	1.exe	33
PID 2536 wrote to memory of 392	2536	1.exe	33
PID 2536 wrote to memory of 572	2536	1.exe	35
PID 2536 wrote to memory of 572	2536	1.exe	35
PID 2536 wrote to memory of 572	2536	1.exe	35
PID 2536 wrote to memory of 2688	2536	1.exe	37
PID 2536 wrote to memory of 2688	2536	1.exe	37
PID 2536 wrote to memory of 2688	2536	1.exe	37
PID 2536 wrote to memory of 1936	2536	1.exe	39
PID 2536 wrote to memory of 1936	2536	1.exe	39
PID 2536 wrote to memory of 1936	2536	1.exe	39
PID 2536 wrote to memory of 2320	2536	1.exe	41
PID 2536 wrote to memory of 2320	2536	1.exe	41
PID 2536 wrote to memory of 2320	2536	1.exe	41
PID 2204 wrote to memory of 2212	2204	taskeng.exe	44
PID 2204 wrote to memory of 2212	2204	taskeng.exe	44
PID 2204 wrote to memory of 2212	2204	taskeng.exe	44
PID 2536 wrote to memory of 2984	2536	1.exe	47
PID 2536 wrote to memory of 2984	2536	1.exe	47
PID 2536 wrote to memory of 2984	2536	1.exe	47
PID 2536 wrote to memory of 1812	2536	1.exe	49
PID 2536 wrote to memory of 1812	2536	1.exe	49
PID 2536 wrote to memory of 1812	2536	1.exe	49
PID 1812 wrote to memory of 808	1812	cmd.exe	51
PID 1812 wrote to memory of 808	1812	cmd.exe	51
PID 1812 wrote to memory of 808	1812	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 (3).exe
"C:\Users\Admin\AppData\Local\Temp\New_Project_1 (3).exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1500
- 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:2536
- - 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:392
- - 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:572
- - 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:2688
- - 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:1936
- - 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:2320
- - C:\Windows\System32\schtasks.exe
    "C:\Windows\System32\schtasks.exe" /delete /f /tn "svchost"
    3⤵
    PID:2984
- - C:\Windows\system32\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp8E89.tmp.bat""
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:1812
  - - C:\Windows\system32\timeout.exe
      timeout 3
      4⤵
      Delays execution with timeout.exe
      PID:808
- 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:2772
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:2196

C:\Windows\system32\taskeng.exe
taskeng.exe {49425304-060F-45F5-8298-1593BB83CBB1} S-1-5-21-330940541-141609230-1670313778-1000:KXIPPCKF\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2204
- C:\Users\Admin\svchost.exe
  C:\Users\Admin\svchost.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2212

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\tmp8E89.tmp.bat

Filesize
153B

MD5
19ac78c3a54505f089496eed3b3b5289

SHA1
8a824743a74a9c3d75b068d41cea7ae66a529695

SHA256
24248f0b859101e8db6cb86659f46fca7922eb9c97b457d2551ce1153b6d3115

SHA512
b1849162b38d5f65b00849c48284f9cf6e6102bc37a7cfdd41d353b979289483dde7fbbe8d3bcea416d71f7234403d73e9efa80337b0b06b0069bc84e568b268

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

Filesize
7KB

MD5
00c6b74aa127aa36b2160827c7de48c2

SHA1
d2bf855615eee6e80782288548c790f44dbfb2a0

SHA256
27f7b45ac5f732320c3ea332dfef7106982257f96f6b0b7713a5682bf181d4dd

SHA512
8e7bd937d7da0b53d3264925025b2904f87df2f139f080c5fe375a569ef0b9dd680e0a5cb83cf8ef081f12bf4f401fc2d93e2e8924be34beabcfd3e4616c7e90

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/392-20-0x000000001B270000-0x000000001B552000-memory.dmp

Filesize
2.9MB

Download
memory/392-21-0x0000000002460000-0x0000000002468000-memory.dmp

Filesize
32KB

Download
memory/572-28-0x00000000025F0000-0x00000000025F8000-memory.dmp

Filesize
32KB

Download
memory/572-27-0x000000001B1E0000-0x000000001B4C2000-memory.dmp

Filesize
2.9MB

Download
memory/1500-0-0x0000000000400000-0x000000000047C000-memory.dmp

Filesize
496KB

Download
memory/2212-47-0x00000000010F0000-0x000000000110C000-memory.dmp

Filesize
112KB

Download
memory/2536-14-0x0000000000D50000-0x0000000000D6C000-memory.dmp

Filesize
112KB

Download
memory/2536-48-0x0000000000B60000-0x0000000000B6C000-memory.dmp

Filesize
48KB

Download
memory/2772-15-0x0000000000EB0000-0x0000000000EF0000-memory.dmp

Filesize
256KB

Download