guloader | 6bc169f4ce1c914bce0a10681748f1e5a1faeb8cd5257bdd0340bee2ede6335b

Analysis

max time kernel
149s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
26-11-2024 01:01

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General

Target

a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe
Size

555KB
MD5

18ea5087eb82e075ca35d2b2dcff9450
SHA1

dc436fbaa777672d44a8b90b98c4a1c266885845
SHA256

a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725
SHA512

8fbeb3caf13a3fe1359002c2848ff5767e6b2f226049546c683f2b6144756196cfe39f66e4959c8426cdfaeff6a169a4cf5939de241e4a898887d8810ec620c6
SSDEEP

12288:32EIiN/Z1++w1p+wJuQbIgJwCQBk5wBcamd3ZhZs:3wiN/K+wHBfhQBk5s3mdPZs

Score

10^/10

guloader xworm discovery downloader execution rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

87.121.86.8:4020

Mutex

ssjpS2lhbkGsnEgT

Attributes

Install_directory
%AppData%
install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/2660-15-0x00000000007E0000-0x00000000007F0000-memory.dmp	family_xworm

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2448	powershell.exe
4964	powershell.exe
4452	powershell.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.lnk	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.lnk	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe

Loads dropped DLL 1 IoCs

pid	Process
4356	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2660	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4356	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe
2660	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4356 set thread context of 2660	4356	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	87

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\slnger\barometerstandenes.san	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe

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 5 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	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2448	powershell.exe
2448	powershell.exe
4964	powershell.exe
4964	powershell.exe
4452	powershell.exe
4452	powershell.exe
2660	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4356	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2660	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe
Token: SeDebugPrivilege	2448	powershell.exe
Token: SeDebugPrivilege	4964	powershell.exe
Token: SeDebugPrivilege	4452	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2660	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4356 wrote to memory of 2660	4356	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	87
PID 4356 wrote to memory of 2660	4356	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	87
PID 4356 wrote to memory of 2660	4356	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	87
PID 4356 wrote to memory of 2660	4356	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	87
PID 4356 wrote to memory of 2660	4356	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	87
PID 2660 wrote to memory of 2448	2660	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	90
PID 2660 wrote to memory of 2448	2660	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	90
PID 2660 wrote to memory of 2448	2660	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	90
PID 2660 wrote to memory of 4964	2660	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	93
PID 2660 wrote to memory of 4964	2660	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	93
PID 2660 wrote to memory of 4964	2660	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	93
PID 2660 wrote to memory of 4452	2660	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	96
PID 2660 wrote to memory of 4452	2660	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	96
PID 2660 wrote to memory of 4452	2660	a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe	96

C:\Users\Admin\AppData\Local\Temp\a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe
"C:\Users\Admin\AppData\Local\Temp\a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4356
- C:\Users\Admin\AppData\Local\Temp\a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe
  "C:\Users\Admin\AppData\Local\Temp\a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2660
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2448
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4964
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4452

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

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

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

Filesize
18KB

MD5
47d4c7d3ef5699c3f11d3f6204570026

SHA1
8ccc0c48e3d98e4b6dbddc26393ecd0bfac38a45

SHA256
73bf8bbf91ad8c52275ad4b730abe61c06a04cb3d6219e9c0a743ee736474677

SHA512
7afdf36b104399bf8393a151fbeec02575999f9de8d3f16c980fabd3aead2a99680c4edbc6fc77d61475fe8f98694d73e3b7780d5db60b8c869db810f77a88be

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

Filesize
18KB

MD5
20b134c1c56ac0cf45e34bd3bd6ba724

SHA1
7d1119b2913e9b3a825e8154eab8682a9ffd3f05

SHA256
558354c2a5bc29c837688d212120a839b8ac60e4c04bba5ec8fc23245f81bc2f

SHA512
cb3f3a0dd8a06baf8233eca232bc0aa203d278c7d495eab993e67cb1a6cf891d0ad6001bf51550157b87cdc3e834a9899367b9f7b4b92a672d3b175f24181212

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3lqqyqp5.fwk.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsjB7A8.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
memory/2448-55-0x0000000007E80000-0x0000000007E94000-memory.dmp

Filesize
80KB

Download
memory/2448-48-0x0000000008280000-0x00000000088FA000-memory.dmp

Filesize
6.5MB

Download
memory/2448-57-0x0000000007F60000-0x0000000007F68000-memory.dmp

Filesize
32KB

Download
memory/2448-56-0x0000000007F80000-0x0000000007F9A000-memory.dmp

Filesize
104KB

Download
memory/2448-54-0x0000000007E70000-0x0000000007E7E000-memory.dmp

Filesize
56KB

Download
memory/2448-52-0x0000000007E40000-0x0000000007E51000-memory.dmp

Filesize
68KB

Download
memory/2448-18-0x0000000003010000-0x0000000003046000-memory.dmp

Filesize
216KB

Download
memory/2448-19-0x0000000005C00000-0x0000000006228000-memory.dmp

Filesize
6.2MB

Download
memory/2448-20-0x0000000005A50000-0x0000000005A72000-memory.dmp

Filesize
136KB

Download
memory/2448-21-0x00000000062A0000-0x0000000006306000-memory.dmp

Filesize
408KB

Download
memory/2448-22-0x0000000006310000-0x0000000006376000-memory.dmp

Filesize
408KB

Download
memory/2448-51-0x0000000007EC0000-0x0000000007F56000-memory.dmp

Filesize
600KB

Download
memory/2448-32-0x0000000006480000-0x00000000067D4000-memory.dmp

Filesize
3.3MB

Download
memory/2448-33-0x0000000006900000-0x000000000691E000-memory.dmp

Filesize
120KB

Download
memory/2448-34-0x0000000006950000-0x000000000699C000-memory.dmp

Filesize
304KB

Download
memory/2448-36-0x000000006EB20000-0x000000006EB6C000-memory.dmp

Filesize
304KB

Download
memory/2448-35-0x0000000006EE0000-0x0000000006F12000-memory.dmp

Filesize
200KB

Download
memory/2448-46-0x0000000007AE0000-0x0000000007AFE000-memory.dmp

Filesize
120KB

Download
memory/2448-47-0x0000000007B00000-0x0000000007BA3000-memory.dmp

Filesize
652KB

Download
memory/2448-50-0x0000000007CB0000-0x0000000007CBA000-memory.dmp

Filesize
40KB

Download
memory/2448-49-0x0000000007C40000-0x0000000007C5A000-memory.dmp

Filesize
104KB

Download
memory/2660-14-0x00000000007E0000-0x0000000001A34000-memory.dmp

Filesize
18.3MB

Download
memory/2660-17-0x0000000001A40000-0x0000000003F79000-memory.dmp

Filesize
37.2MB

Download
memory/2660-16-0x0000000036760000-0x00000000367FC000-memory.dmp

Filesize
624KB

Download
memory/2660-15-0x00000000007E0000-0x00000000007F0000-memory.dmp

Filesize
64KB

Download
memory/2660-108-0x00000000370B0000-0x0000000037654000-memory.dmp

Filesize
5.6MB

Download
memory/2660-110-0x0000000037860000-0x000000003786A000-memory.dmp

Filesize
40KB

Download
memory/2660-109-0x00000000377A0000-0x0000000037832000-memory.dmp

Filesize
584KB

Download
memory/2660-13-0x0000000001A40000-0x0000000003F79000-memory.dmp

Filesize
37.2MB

Download
memory/4356-12-0x0000000002DF0000-0x0000000005329000-memory.dmp

Filesize
37.2MB

Download
memory/4356-11-0x0000000074654000-0x0000000074655000-memory.dmp

Filesize
4KB

Download
memory/4356-10-0x0000000002DF0000-0x0000000005329000-memory.dmp

Filesize
37.2MB

Download
memory/4356-9-0x0000000077961000-0x0000000077A81000-memory.dmp

Filesize
1.1MB

Download
memory/4356-8-0x0000000002DF0000-0x0000000005329000-memory.dmp

Filesize
37.2MB

Download
memory/4452-93-0x000000006EB20000-0x000000006EB6C000-memory.dmp

Filesize
304KB

Download
memory/4964-72-0x000000006EB20000-0x000000006EB6C000-memory.dmp

Filesize
304KB

Download
memory/4964-61-0x0000000005C60000-0x0000000005FB4000-memory.dmp

Filesize
3.3MB

Download