guloader | 0e756b2e05f28dcfb139b13bbe39e95953c1b420c1596e01304ca76fc7c688f8

Analysis

max time kernel
148s
max time network
142s
platform
windows10-2004_x64
resource
win10v2004-20250314-en
resource tags

arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
submitted
27/03/2025, 01:20

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

employee performance report.exe
Size

1011KB
MD5

e5fe1c0aabcf82525765543518b10947
SHA1

51327f7690a266384123b9f2eb4a51b97638f2dd
SHA256

d30b99cefc552af16433fc29e1c02696677d8b2727677ed5fcac6465b419ad3d
SHA512

76f0b85daddeed0ef280bf5aeb6126bc0b5dfba9b01c99d5ae7f2f61eb371a2e8c42bed9d7e9bb7dcfcc1acf861a720856b541f6f56f35c2d9c800c42985c0a7
SSDEEP

24576:rkvVNzWWyMVtQSKkyt2Jfu+dUph4u+E83WB0N48cLpT15+G3:rmLFZVtQkyq2iUph4U83WBxZdpYu

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

Guloader family
guloader
Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 2 IoCs

pid	Process
4116	employee performance report.exe
4116	employee performance report.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
25	drive.google.com
26	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4116	employee performance report.exe
6028	employee performance report.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\bouts.ini	employee performance report.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Sharer.cam	employee performance report.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 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	employee performance report.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	employee performance report.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4116	employee performance report.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 4116 wrote to memory of 6028	4116	employee performance report.exe	96
PID 4116 wrote to memory of 6028	4116	employee performance report.exe	96
PID 4116 wrote to memory of 6028	4116	employee performance report.exe	96
PID 4116 wrote to memory of 6028	4116	employee performance report.exe	96

C:\Users\Admin\AppData\Local\Temp\employee performance report.exe
"C:\Users\Admin\AppData\Local\Temp\employee performance report.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4116
- C:\Users\Admin\AppData\Local\Temp\employee performance report.exe
  "C:\Users\Admin\AppData\Local\Temp\employee performance report.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:6028

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Program Files (x86)\bouts.ini

Filesize
34B

MD5
c5b6ed57c78f93e1200a2b7f05af4d89

SHA1
299326b64ab38fc50affed801b2959427e3b3853

SHA256
70e7c4f9534d3ef250f0e2ad5cd2b68fba8eccba9e7d311e0c2ed08e6f340d5f

SHA512
1895a78aa7c10c0642bbad00f82a5f869a1afa0581ff7d0e3fcd9070789c09d8bee216319ae3f5da5283bd9eb5c82fd8d1076f488f4ecd6b2b63e217f91b6a7e

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsa6236.tmp\System.dll

Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
C:\Users\Admin\skattekistes.lnk

Filesize
998B

MD5
0f16dbd4b748cad07e69e5af14870127

SHA1
2dbf73b43cd1cea0dc92d55309c04b8ae4bf2495

SHA256
c3bd5b9820bf3ff832b35126443d40a33de763989c47961b5e89a32fcd58e687

SHA512
551ad090448c026f1efb7fd70ff701dbe142a0a591f006a58c598c7538c9a6b2fc66a0ec0c1128e7f8285895d5a6b45f70ded7849128f05b6e6b4efbdd5c66ff

Download Submit
memory/4116-291-0x0000000077701000-0x0000000077821000-memory.dmp

Filesize
1.1MB

Download
memory/4116-293-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/4116-292-0x0000000077701000-0x0000000077821000-memory.dmp

Filesize
1.1MB

Download
memory/6028-294-0x00000000016D0000-0x0000000004F21000-memory.dmp

Filesize
56.3MB

Download
memory/6028-295-0x0000000077788000-0x0000000077789000-memory.dmp

Filesize
4KB

Download
memory/6028-296-0x00000000777A5000-0x00000000777A6000-memory.dmp

Filesize
4KB

Download
memory/6028-306-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/6028-307-0x0000000077701000-0x0000000077821000-memory.dmp

Filesize
1.1MB

Download