umbral | 9b802ef1b1e58a521a45dbd45c48c75c5b7f9ac53b273d6d2cf868c1f6d46885

Analysis

max time kernel
5s
max time network
6s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
10-10-2024 10:43

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General

Target

loader.exe
Size

5.2MB
MD5

c136329a989aad9543c913f9197a01fe
SHA1

0b3bdab50947cf330243938c9ccb3e685c43457b
SHA256

9b802ef1b1e58a521a45dbd45c48c75c5b7f9ac53b273d6d2cf868c1f6d46885
SHA512

fa7a7efa10b4da760b7d281aa235fa4bb4ce28d12796f28632fd653ae184a6f09bc796c18ba1aa3253f713af0334d97f040dc762a8a1d25352dc7308d49b8590
SSDEEP

98304:fKYhdZRJ8os9WXz/DsEAE4SfTQ3+5wJCn9cK4KwrUWxeNVSreDGknLjiSXBI:CYhdo0D/D1J8+mM9Y/gNIsGkLj

Score

10^/10

umbral xworm discovery execution rat stealer trojan

Malware Config

Extracted

Family

xworm

Version

5.0

testarosa.duckdns.org:7110

Mutex

5ZpeoOe6AtQfr6wU

Attributes

Install_directory
%AppData%
install_file
Ondrive.exe

aes.plain

Signatures

Detect Umbral payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0008000000023c94-6.dat	family_umbral
behavioral1/memory/312-22-0x000002159AA30000-0x000002159AA70000-memory.dmp	family_umbral

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x0007000000023c99-43.dat	family_xworm
behavioral1/memory/464-52-0x0000000000B00000-0x0000000000B10000-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 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2372	powershell.exe
4624	powershell.exe

Checks computer location settings 2 TTPs 4 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	loader.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	Server.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	loader.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3756129449-3121373848-4276368241-1000\Control Panel\International\Geo\Nation	Server.exe

Executes dropped EXE 8 IoCs

pid	Process
312	Aquatic.exe
1524	Server.exe
4208	Server.exe
464	conhost.exe
2708	Aquatic.exe
3856	Server.exe
4584	Server.exe
4868	conhost.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
17	ip-api.com

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	312	Aquatic.exe
Token: SeDebugPrivilege	464	conhost.exe
Token: SeIncreaseQuotaPrivilege	3452	wmic.exe
Token: SeSecurityPrivilege	3452	wmic.exe
Token: SeTakeOwnershipPrivilege	3452	wmic.exe
Token: SeLoadDriverPrivilege	3452	wmic.exe
Token: SeSystemProfilePrivilege	3452	wmic.exe
Token: SeSystemtimePrivilege	3452	wmic.exe
Token: SeProfSingleProcessPrivilege	3452	wmic.exe
Token: SeIncBasePriorityPrivilege	3452	wmic.exe
Token: SeCreatePagefilePrivilege	3452	wmic.exe
Token: SeBackupPrivilege	3452	wmic.exe
Token: SeRestorePrivilege	3452	wmic.exe
Token: SeShutdownPrivilege	3452	wmic.exe
Token: SeDebugPrivilege	3452	wmic.exe
Token: SeSystemEnvironmentPrivilege	3452	wmic.exe
Token: SeRemoteShutdownPrivilege	3452	wmic.exe
Token: SeUndockPrivilege	3452	wmic.exe
Token: SeManageVolumePrivilege	3452	wmic.exe
Token: 33	3452	wmic.exe
Token: 34	3452	wmic.exe
Token: 35	3452	wmic.exe
Token: 36	3452	wmic.exe
Token: SeIncreaseQuotaPrivilege	3452	wmic.exe
Token: SeSecurityPrivilege	3452	wmic.exe
Token: SeTakeOwnershipPrivilege	3452	wmic.exe
Token: SeLoadDriverPrivilege	3452	wmic.exe
Token: SeSystemProfilePrivilege	3452	wmic.exe
Token: SeSystemtimePrivilege	3452	wmic.exe
Token: SeProfSingleProcessPrivilege	3452	wmic.exe
Token: SeIncBasePriorityPrivilege	3452	wmic.exe
Token: SeCreatePagefilePrivilege	3452	wmic.exe
Token: SeBackupPrivilege	3452	wmic.exe
Token: SeRestorePrivilege	3452	wmic.exe
Token: SeShutdownPrivilege	3452	wmic.exe
Token: SeDebugPrivilege	3452	wmic.exe
Token: SeSystemEnvironmentPrivilege	3452	wmic.exe
Token: SeRemoteShutdownPrivilege	3452	wmic.exe
Token: SeUndockPrivilege	3452	wmic.exe
Token: SeManageVolumePrivilege	3452	wmic.exe
Token: 33	3452	wmic.exe
Token: 34	3452	wmic.exe
Token: 35	3452	wmic.exe
Token: 36	3452	wmic.exe
Token: SeDebugPrivilege	2708	Aquatic.exe
Token: SeDebugPrivilege	4868	conhost.exe
Token: SeIncreaseQuotaPrivilege	3620	wmic.exe
Token: SeSecurityPrivilege	3620	wmic.exe
Token: SeTakeOwnershipPrivilege	3620	wmic.exe
Token: SeLoadDriverPrivilege	3620	wmic.exe
Token: SeSystemProfilePrivilege	3620	wmic.exe
Token: SeSystemtimePrivilege	3620	wmic.exe
Token: SeProfSingleProcessPrivilege	3620	wmic.exe
Token: SeIncBasePriorityPrivilege	3620	wmic.exe
Token: SeCreatePagefilePrivilege	3620	wmic.exe
Token: SeBackupPrivilege	3620	wmic.exe
Token: SeRestorePrivilege	3620	wmic.exe
Token: SeShutdownPrivilege	3620	wmic.exe
Token: SeDebugPrivilege	3620	wmic.exe
Token: SeSystemEnvironmentPrivilege	3620	wmic.exe
Token: SeRemoteShutdownPrivilege	3620	wmic.exe
Token: SeUndockPrivilege	3620	wmic.exe
Token: SeManageVolumePrivilege	3620	wmic.exe
Token: 33	3620	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 2312 wrote to memory of 312	2312	loader.exe	87
PID 2312 wrote to memory of 312	2312	loader.exe	87
PID 2312 wrote to memory of 1524	2312	loader.exe	88
PID 2312 wrote to memory of 1524	2312	loader.exe	88
PID 2312 wrote to memory of 2540	2312	loader.exe	89
PID 2312 wrote to memory of 2540	2312	loader.exe	89
PID 1524 wrote to memory of 4208	1524	Server.exe	90
PID 1524 wrote to memory of 4208	1524	Server.exe	90
PID 1524 wrote to memory of 4208	1524	Server.exe	90
PID 1524 wrote to memory of 464	1524	Server.exe	91
PID 1524 wrote to memory of 464	1524	Server.exe	91
PID 312 wrote to memory of 3452	312	Aquatic.exe	92
PID 312 wrote to memory of 3452	312	Aquatic.exe	92
PID 2540 wrote to memory of 2708	2540	loader.exe	95
PID 2540 wrote to memory of 2708	2540	loader.exe	95
PID 2540 wrote to memory of 3856	2540	loader.exe	96
PID 2540 wrote to memory of 3856	2540	loader.exe	96
PID 2540 wrote to memory of 1392	2540	loader.exe	97
PID 2540 wrote to memory of 1392	2540	loader.exe	97
PID 3856 wrote to memory of 4584	3856	Server.exe	98
PID 3856 wrote to memory of 4584	3856	Server.exe	98
PID 3856 wrote to memory of 4584	3856	Server.exe	98
PID 3856 wrote to memory of 4868	3856	Server.exe	99
PID 3856 wrote to memory of 4868	3856	Server.exe	99
PID 2708 wrote to memory of 3620	2708	Aquatic.exe	100
PID 2708 wrote to memory of 3620	2708	Aquatic.exe	100

C:\Users\Admin\AppData\Local\Temp\loader.exe
"C:\Users\Admin\AppData\Local\Temp\loader.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2312
- C:\Users\Admin\AppData\Local\Temp\Aquatic.exe
  "C:\Users\Admin\AppData\Local\Temp\Aquatic.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:312
- - C:\Windows\System32\Wbem\wmic.exe
    "wmic.exe" csproduct get uuid
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3452
- C:\Users\Admin\AppData\Local\Temp\Server.exe
  "C:\Users\Admin\AppData\Local\Temp\Server.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Suspicious use of WriteProcessMemory
  PID:1524
- - C:\Users\Admin\AppData\Roaming\Server.exe
    "C:\Users\Admin\AppData\Roaming\Server.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4208
- - C:\Users\Admin\AppData\Roaming\conhost.exe
    "C:\Users\Admin\AppData\Roaming\conhost.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:464
  - - 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\Roaming\conhost.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      PID:4624
  - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'conhost.exe'
      4⤵
      Command and Scripting Interpreter: PowerShell
      PID:2372
- C:\Users\Admin\AppData\Local\Temp\loader.exe
  "C:\Users\Admin\AppData\Local\Temp\loader.exe"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:2540
- - C:\Users\Admin\AppData\Local\Temp\Aquatic.exe
    "C:\Users\Admin\AppData\Local\Temp\Aquatic.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2708
  - - C:\Windows\System32\Wbem\wmic.exe
      "wmic.exe" csproduct get uuid
      4⤵
      Suspicious use of AdjustPrivilegeToken
      PID:3620
- - C:\Users\Admin\AppData\Local\Temp\Server.exe
    "C:\Users\Admin\AppData\Local\Temp\Server.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:3856
  - - C:\Users\Admin\AppData\Roaming\Server.exe
      "C:\Users\Admin\AppData\Roaming\Server.exe"
      4⤵
      Executes dropped EXE
      System Location Discovery: System Language Discovery
      PID:4584
  - - C:\Users\Admin\AppData\Roaming\conhost.exe
      "C:\Users\Admin\AppData\Roaming\conhost.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:4868
- - C:\Users\Admin\AppData\Local\Temp\loader.exe
    "C:\Users\Admin\AppData\Local\Temp\loader.exe"
    3⤵
    PID:1392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Aquatic.exe.log

Filesize
1KB

MD5
8094b248fe3231e48995c2be32aeb08c

SHA1
2fe06e000ebec919bf982d033c5d1219c1f916b6

SHA256
136c30d964f4abbb5279bdc86d0e00578333782f15f05f0d2d050730dcb7a9bc

SHA512
bf27a3822008796370e2c506c910a40992b9240606ea1bc19f683b2fee86b81897660ac0cf8e746ca093dae9e408949e2e9002ded75678a69f020d3b0452801f

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\loader.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
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
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

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

Filesize
229KB

MD5
56c788116da32ec8e9ac3b1b0e66b520

SHA1
545f203f2bdf6fac2f131a76a5f36e21637b27ca

SHA256
f67268d2659ceb1e8cf8a7560784372294bcd8f249f7c0efdf33216722a5f0bb

SHA512
7da85b8e5f92f4a448a10f5c60c21f46b3eb511fda461b15956339ca7130c901e05ad58856a3a3903cdb52b81c4051d3bb0222e87aefab87136351d1ff01734f

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

Filesize
71KB

MD5
f9b08bd21b40a938122b479095b7c70c

SHA1
eb925e3927b83c20d8d24bdab2e587c10d6ac8cd

SHA256
c96cde2e96021c266a202286d644ceb28543d6347e21006d72b29b8a72c505e8

SHA512
fcc5784936b7f85a550883c472b99b5edfa7e5c6fd3872fd806b81c2ce1f195ca34342b230a89456066885579fe55aea46d91074ac08af192fbd04ea158473ee

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3hrefxid.b3s.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\Server.exe

Filesize
23KB

MD5
32fe01ccb93b0233503d0aaaa451f7b2

SHA1
58e5a63142150e8fb175dbb4dedea2ce405d7db0

SHA256
6988ee719a54c93a89303dcff277c62ae4890274cc45f074bc7effde315fbf43

SHA512
76945f23a49d594e325d80ffc0570341044ac0b97bd889c92f90bc56d3cdff5c1b29178be4f157c8c1bb9ce7cc311765309f2e6f7b08b24e7acf983ea67635a6

Download Submit
C:\Users\Admin\AppData\Roaming\conhost.exe

Filesize
37KB

MD5
b37dd1a1f0507baf993471ae1b7a314c

SHA1
9aff9d71492ffff8d51f8e8d67f5770755899882

SHA256
e58e8918a443c0061add029f8f211f6551a130202195cc2b9b529ea72553e0bc

SHA512
ac76d5b10540eb292341f30c7abfd81f03be65f6655c814aba6ac6a0ecf4f0f2c34c3b8e63ceef8c4579f98b7459e51b9fdd30d601c6d1930860ab7c154da460

Download Submit
memory/312-55-0x00007FF81A2E0000-0x00007FF81ADA1000-memory.dmp

Filesize
10.8MB

Download
memory/312-22-0x000002159AA30000-0x000002159AA70000-memory.dmp

Filesize
256KB

Download
memory/312-26-0x00007FF81A2E0000-0x00007FF81ADA1000-memory.dmp

Filesize
10.8MB

Download
memory/464-52-0x0000000000B00000-0x0000000000B10000-memory.dmp

Filesize
64KB

Download
memory/1524-53-0x00007FF81A2E0000-0x00007FF81ADA1000-memory.dmp

Filesize
10.8MB

Download
memory/1524-28-0x00007FF81A2E0000-0x00007FF81ADA1000-memory.dmp

Filesize
10.8MB

Download
memory/1524-30-0x0000000000300000-0x0000000000318000-memory.dmp

Filesize
96KB

Download
memory/2312-32-0x00007FF81A2E0000-0x00007FF81ADA1000-memory.dmp

Filesize
10.8MB

Download
memory/2312-0-0x00007FF81A2E3000-0x00007FF81A2E5000-memory.dmp

Filesize
8KB

Download
memory/2312-10-0x00007FF81A2E0000-0x00007FF81ADA1000-memory.dmp

Filesize
10.8MB

Download
memory/2312-1-0x0000000000B40000-0x000000000107E000-memory.dmp

Filesize
5.2MB

Download
memory/2372-107-0x000001F859900000-0x000001F859A6A000-memory.dmp

Filesize
1.4MB

Download
memory/4624-87-0x000001DC1C670000-0x000001DC1C692000-memory.dmp

Filesize
136KB

Download
memory/4624-94-0x000001DC1CA90000-0x000001DC1CBFA000-memory.dmp

Filesize
1.4MB

Download