guloader | 5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727

General

Target

5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe
Size

555KB
MD5

7efdc7ca9699ef7177443900e5507ab2
SHA1

94ff3238018e8d5e20b21cd5eaa83e5fcc3f6c73
SHA256

5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727
SHA512

a08a21b4df939da53f070c647b3929b11dfceee470e624a1a8aad2a4d2c29f4c45f6acc3b9f00c0e25aa872ec5aa499249fae11b3585f17163d8626d7f6bcfa4
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
behavioral1/memory/1672-17-0x00000000007E0000-0x00000000007F0000-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
2872	powershell.exe
2648	powershell.exe
2736	powershell.exe

Drops startup file 2 IoCs

Processes:

5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.lnk	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.lnk	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

Loads dropped DLL 2 IoCs

Processes:

5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

pid	Process
796	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe
1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

Processes:

5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

pid	Process
1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

pid	Process
796	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe
1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

description	pid	Process	procid_target
PID 796 set thread context of 1672	796	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	28

Drops file in Windows directory 1 IoCs

Processes:

5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\slnger\barometerstandenes.san	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.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:

5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exepowershell.exepowershell.exepowershell.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.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 4 IoCs

Processes:

powershell.exepowershell.exepowershell.exe5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

pid	Process
2872	powershell.exe
2648	powershell.exe
2736	powershell.exe
1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

pid	Process
796	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exepowershell.exepowershell.exepowershell.exe

description	pid	Process
Token: SeDebugPrivilege	1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe
Token: SeDebugPrivilege	2872	powershell.exe
Token: SeDebugPrivilege	2648	powershell.exe
Token: SeDebugPrivilege	2736	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

pid	Process
1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

Suspicious use of WriteProcessMemory 18 IoCs

Processes:

5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

description	pid	Process	procid_target
PID 796 wrote to memory of 1672	796	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	28
PID 796 wrote to memory of 1672	796	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	28
PID 796 wrote to memory of 1672	796	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	28
PID 796 wrote to memory of 1672	796	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	28
PID 796 wrote to memory of 1672	796	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	28
PID 796 wrote to memory of 1672	796	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	28
PID 1672 wrote to memory of 2872	1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	32
PID 1672 wrote to memory of 2872	1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	32
PID 1672 wrote to memory of 2872	1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	32
PID 1672 wrote to memory of 2872	1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	32
PID 1672 wrote to memory of 2648	1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	34
PID 1672 wrote to memory of 2648	1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	34
PID 1672 wrote to memory of 2648	1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	34
PID 1672 wrote to memory of 2648	1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	34
PID 1672 wrote to memory of 2736	1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	36
PID 1672 wrote to memory of 2736	1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	36
PID 1672 wrote to memory of 2736	1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	36
PID 1672 wrote to memory of 2736	1672	5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe	36

C:\Users\Admin\AppData\Local\Temp\5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe
"C:\Users\Admin\AppData\Local\Temp\5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.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:796
- C:\Users\Admin\AppData\Local\Temp\5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe
  "C:\Users\Admin\AppData\Local\Temp\5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe"
  2⤵
  - Drops startup file
  - Loads dropped DLL
  - 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:1672
- - 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\5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2872
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2648
- - 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\5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2736

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

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
07d07ee7f23d01b25fdb63c4b97f7184

SHA1
5e88a92f5fecca91b34916e4832163a8c41ec448

SHA256
38c576f87e1501c83fffcd54ae29546b51f24b71b72f489dac0564da95502010

SHA512
3e6d214dd3ce51933163b58e0171c233ccb15e935f90f020b6ae702016514f1a044d5218265b66659dd92629c9ee1794f42435d7a82afd87847949f600a9bd9e

Download Submit
\??\PIPE\srvsvc

MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
\Users\Admin\AppData\Local\Temp\nsy8805.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
\Users\Admin\AppData\Roaming\5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727.exe

Filesize
555KB

MD5
7efdc7ca9699ef7177443900e5507ab2

SHA1
94ff3238018e8d5e20b21cd5eaa83e5fcc3f6c73

SHA256
5d3f5e3134c740cd9154b677fe1f6465acd0efd74818220e8655de7296801727

SHA512
a08a21b4df939da53f070c647b3929b11dfceee470e624a1a8aad2a4d2c29f4c45f6acc3b9f00c0e25aa872ec5aa499249fae11b3585f17163d8626d7f6bcfa4

Download Submit
memory/796-9-0x0000000003120000-0x0000000005659000-memory.dmp

Filesize
37.2MB

Download
memory/796-10-0x00000000770B1000-0x00000000771B2000-memory.dmp

Filesize
1.0MB

Download
memory/796-11-0x00000000770B0000-0x0000000077259000-memory.dmp

Filesize
1.7MB

Download
memory/796-12-0x0000000003120000-0x0000000005659000-memory.dmp

Filesize
37.2MB

Download
memory/796-14-0x0000000003120000-0x0000000005659000-memory.dmp

Filesize
37.2MB

Download
memory/1672-13-0x00000000770B0000-0x0000000077259000-memory.dmp

Filesize
1.7MB

Download
memory/1672-17-0x00000000007E0000-0x00000000007F0000-memory.dmp

Filesize
64KB

Download
memory/1672-16-0x00000000007E0000-0x0000000001842000-memory.dmp

Filesize
16.4MB

Download
memory/1672-15-0x00000000007E0000-0x0000000001842000-memory.dmp

Filesize
16.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads