guloader | a7247c64cc0168290ca3b210e59ef629b46f513205bc6562ec79cdd2cda71725

General

Target

18ea5087eb82e075ca35d2b2dcff9450.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

C2

87.121.86.8:4020

Mutex

ssjpS2lhbkGsnEgT

Attributes

Install_directory
%AppData%
install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4916-15-0x00000000007E0000-0x00000000007F0000-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

Processes:

powershell.exepowershell.exepowershell.exe

pid	Process
2560	powershell.exe
4072	powershell.exe
832	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

Processes:

18ea5087eb82e075ca35d2b2dcff9450.exe

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	18ea5087eb82e075ca35d2b2dcff9450.exe

Drops startup file 2 IoCs

Processes:

18ea5087eb82e075ca35d2b2dcff9450.exe

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\18ea5087eb82e075ca35d2b2dcff9450.lnk	18ea5087eb82e075ca35d2b2dcff9450.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\18ea5087eb82e075ca35d2b2dcff9450.lnk	18ea5087eb82e075ca35d2b2dcff9450.exe

Loads dropped DLL 1 IoCs

Processes:

18ea5087eb82e075ca35d2b2dcff9450.exe

pid	Process
3204	18ea5087eb82e075ca35d2b2dcff9450.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

18ea5087eb82e075ca35d2b2dcff9450.exe

pid	Process
4916	18ea5087eb82e075ca35d2b2dcff9450.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

18ea5087eb82e075ca35d2b2dcff9450.exe18ea5087eb82e075ca35d2b2dcff9450.exe

pid	Process
3204	18ea5087eb82e075ca35d2b2dcff9450.exe
4916	18ea5087eb82e075ca35d2b2dcff9450.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

18ea5087eb82e075ca35d2b2dcff9450.exe

description	pid	Process	procid_target
PID 3204 set thread context of 4916	3204	18ea5087eb82e075ca35d2b2dcff9450.exe	89

Drops file in Windows directory 1 IoCs

Processes:

18ea5087eb82e075ca35d2b2dcff9450.exe

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\slnger\barometerstandenes.san	18ea5087eb82e075ca35d2b2dcff9450.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

Processes:

18ea5087eb82e075ca35d2b2dcff9450.exe18ea5087eb82e075ca35d2b2dcff9450.exepowershell.exepowershell.exepowershell.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	18ea5087eb82e075ca35d2b2dcff9450.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	18ea5087eb82e075ca35d2b2dcff9450.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

Processes:

powershell.exepowershell.exepowershell.exe18ea5087eb82e075ca35d2b2dcff9450.exe

pid	Process
832	powershell.exe
832	powershell.exe
2560	powershell.exe
2560	powershell.exe
4072	powershell.exe
4072	powershell.exe
4916	18ea5087eb82e075ca35d2b2dcff9450.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

18ea5087eb82e075ca35d2b2dcff9450.exe

pid	Process
3204	18ea5087eb82e075ca35d2b2dcff9450.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

18ea5087eb82e075ca35d2b2dcff9450.exepowershell.exepowershell.exepowershell.exe

description	pid	Process
Token: SeDebugPrivilege	4916	18ea5087eb82e075ca35d2b2dcff9450.exe
Token: SeDebugPrivilege	832	powershell.exe
Token: SeDebugPrivilege	2560	powershell.exe
Token: SeDebugPrivilege	4072	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

18ea5087eb82e075ca35d2b2dcff9450.exe

pid	Process
4916	18ea5087eb82e075ca35d2b2dcff9450.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

18ea5087eb82e075ca35d2b2dcff9450.exe18ea5087eb82e075ca35d2b2dcff9450.exe

description	pid	Process	procid_target
PID 3204 wrote to memory of 4916	3204	18ea5087eb82e075ca35d2b2dcff9450.exe	89
PID 3204 wrote to memory of 4916	3204	18ea5087eb82e075ca35d2b2dcff9450.exe	89
PID 3204 wrote to memory of 4916	3204	18ea5087eb82e075ca35d2b2dcff9450.exe	89
PID 3204 wrote to memory of 4916	3204	18ea5087eb82e075ca35d2b2dcff9450.exe	89
PID 3204 wrote to memory of 4916	3204	18ea5087eb82e075ca35d2b2dcff9450.exe	89
PID 4916 wrote to memory of 832	4916	18ea5087eb82e075ca35d2b2dcff9450.exe	97
PID 4916 wrote to memory of 832	4916	18ea5087eb82e075ca35d2b2dcff9450.exe	97
PID 4916 wrote to memory of 832	4916	18ea5087eb82e075ca35d2b2dcff9450.exe	97
PID 4916 wrote to memory of 2560	4916	18ea5087eb82e075ca35d2b2dcff9450.exe	99
PID 4916 wrote to memory of 2560	4916	18ea5087eb82e075ca35d2b2dcff9450.exe	99
PID 4916 wrote to memory of 2560	4916	18ea5087eb82e075ca35d2b2dcff9450.exe	99
PID 4916 wrote to memory of 4072	4916	18ea5087eb82e075ca35d2b2dcff9450.exe	101
PID 4916 wrote to memory of 4072	4916	18ea5087eb82e075ca35d2b2dcff9450.exe	101
PID 4916 wrote to memory of 4072	4916	18ea5087eb82e075ca35d2b2dcff9450.exe	101

C:\Users\Admin\AppData\Local\Temp\18ea5087eb82e075ca35d2b2dcff9450.exe
"C:\Users\Admin\AppData\Local\Temp\18ea5087eb82e075ca35d2b2dcff9450.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:3204
- C:\Users\Admin\AppData\Local\Temp\18ea5087eb82e075ca35d2b2dcff9450.exe
  "C:\Users\Admin\AppData\Local\Temp\18ea5087eb82e075ca35d2b2dcff9450.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:4916
- - 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\18ea5087eb82e075ca35d2b2dcff9450.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:832
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '18ea5087eb82e075ca35d2b2dcff9450.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2560
- - 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\18ea5087eb82e075ca35d2b2dcff9450.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4072

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

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
3cbaee87c5230e4a14353280bff5a0ad

SHA1
9483fdd0c2b5bcc91d7f7e8ae1936502d3b0c19f

SHA256
b98c7f43f1854a6297e0226bd9bd3640dc30cd2e426f3de789a3669cdaf44026

SHA512
05c52a9bace2c61a338ef979e179f2c3132d0a743fd74eee74bf47575ac51161e6be497d1ec9fb040756c7793784a37dd1a479597ed0bf9715c06d919c45446e

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

Filesize
18KB

MD5
f6d6b82fae80ce472a05e12c4321fedd

SHA1
2534428c6eaf0ec64583dbe1af60584db94263ef

SHA256
90dc3c05d9d6a5cd23784a22075f9504e942d90c836eb62466aed1021ea19628

SHA512
1def7a876f8691aa9c1287510e5b5623191f5135f7a7ae0cd19c11ce4c6370d16098c84f2aa88d1f3d01eafb4ccc7a52c7def26789a3b8460825e4a3420fa31c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_flkne04n.aks.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsi804D.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
memory/832-55-0x0000000007940000-0x0000000007954000-memory.dmp

Filesize
80KB

Download
memory/832-49-0x0000000007D40000-0x00000000083BA000-memory.dmp

Filesize
6.5MB

Download
memory/832-57-0x0000000007A20000-0x0000000007A28000-memory.dmp

Filesize
32KB

Download
memory/832-56-0x0000000007A40000-0x0000000007A5A000-memory.dmp

Filesize
104KB

Download
memory/832-54-0x0000000007930000-0x000000000793E000-memory.dmp

Filesize
56KB

Download
memory/832-53-0x0000000007900000-0x0000000007911000-memory.dmp

Filesize
68KB

Download
memory/832-19-0x0000000002AD0000-0x0000000002B06000-memory.dmp

Filesize
216KB

Download
memory/832-20-0x0000000005630000-0x0000000005C58000-memory.dmp

Filesize
6.2MB

Download
memory/832-21-0x0000000005560000-0x0000000005582000-memory.dmp

Filesize
136KB

Download
memory/832-22-0x0000000005D50000-0x0000000005DB6000-memory.dmp

Filesize
408KB

Download
memory/832-23-0x0000000005DC0000-0x0000000005E26000-memory.dmp

Filesize
408KB

Download
memory/832-52-0x0000000007980000-0x0000000007A16000-memory.dmp

Filesize
600KB

Download
memory/832-24-0x0000000005E30000-0x0000000006184000-memory.dmp

Filesize
3.3MB

Download
memory/832-34-0x00000000063E0000-0x00000000063FE000-memory.dmp

Filesize
120KB

Download
memory/832-35-0x0000000006930000-0x000000000697C000-memory.dmp

Filesize
304KB

Download
memory/832-36-0x0000000007590000-0x00000000075C2000-memory.dmp

Filesize
200KB

Download
memory/832-37-0x000000006E9C0000-0x000000006EA0C000-memory.dmp

Filesize
304KB

Download
memory/832-47-0x00000000069A0000-0x00000000069BE000-memory.dmp

Filesize
120KB

Download
memory/832-48-0x00000000075D0000-0x0000000007673000-memory.dmp

Filesize
652KB

Download
memory/832-51-0x0000000007770000-0x000000000777A000-memory.dmp

Filesize
40KB

Download
memory/832-50-0x0000000007700000-0x000000000771A000-memory.dmp

Filesize
104KB

Download
memory/2560-70-0x0000000006430000-0x0000000006784000-memory.dmp

Filesize
3.3MB

Download
memory/2560-72-0x000000006E9C0000-0x000000006EA0C000-memory.dmp

Filesize
304KB

Download
memory/3204-11-0x0000000002DF0000-0x0000000005329000-memory.dmp

Filesize
37.2MB

Download
memory/3204-10-0x00000000744F4000-0x00000000744F5000-memory.dmp

Filesize
4KB

Download
memory/3204-8-0x0000000002DF0000-0x0000000005329000-memory.dmp

Filesize
37.2MB

Download
memory/3204-12-0x0000000002DF0000-0x0000000005329000-memory.dmp

Filesize
37.2MB

Download
memory/3204-9-0x0000000077801000-0x0000000077921000-memory.dmp

Filesize
1.1MB

Download
memory/4072-94-0x000000006E9C0000-0x000000006EA0C000-memory.dmp

Filesize
304KB

Download
memory/4916-18-0x0000000001A40000-0x0000000003F79000-memory.dmp

Filesize
37.2MB

Download
memory/4916-14-0x00000000007E0000-0x0000000001A34000-memory.dmp

Filesize
18.3MB

Download
memory/4916-15-0x00000000007E0000-0x00000000007F0000-memory.dmp

Filesize
64KB

Download
memory/4916-13-0x0000000001A40000-0x0000000003F79000-memory.dmp

Filesize
37.2MB

Download
memory/4916-16-0x0000000036880000-0x000000003691C000-memory.dmp

Filesize
624KB

Download
memory/4916-109-0x0000000037180000-0x0000000037724000-memory.dmp

Filesize
5.6MB

Download
memory/4916-110-0x00000000378E0000-0x0000000037972000-memory.dmp

Filesize
584KB

Download
memory/4916-111-0x00000000379A0000-0x00000000379AA000-memory.dmp

Filesize
40KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads