guloader | 635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
26/09/2024, 10:21

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General

Target

635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe
Size

624KB
MD5

50ade32ff9b174e1ce5788d9b0382bcc
SHA1

47945e27bb8c49412cb405281d57c28af7db0812
SHA256

635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe
SHA512

155fa422dd5e74606528179aa147a0ebfeea3a29154b97885dd1741ad9feb6d37dd64ed122381ee691ecfdc4d4335659ce6f7484414d948ceaf16eca2c1f1787
SSDEEP

12288:VY+T5LbPV56MWGSf9sdrHbgeaWA+1DLTW:VYYLbr6MhS64eNw

Score

10^/10

guloader discovery downloader

Malware Config

Signatures

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

Loads dropped DLL 2 IoCs

pid	Process
2296	635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe
2296	635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2296	635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe
3228	635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2296 set thread context of 3228	2296	635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe	84

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	635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2296	635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2296 wrote to memory of 3228	2296	635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe	84
PID 2296 wrote to memory of 3228	2296	635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe	84
PID 2296 wrote to memory of 3228	2296	635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe	84
PID 2296 wrote to memory of 3228	2296	635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe	84
PID 2296 wrote to memory of 3228	2296	635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe	84

C:\Users\Admin\AppData\Local\Temp\635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe
"C:\Users\Admin\AppData\Local\Temp\635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2296
- C:\Users\Admin\AppData\Local\Temp\635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe
  "C:\Users\Admin\AppData\Local\Temp\635057b83f36b7fd2061a67442e4bc6115b7bff972cf86bd0941bde151eb9cfe.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:3228

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

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsm8BE6.tmp\System.dll

Filesize
12KB

MD5
cff85c549d536f651d4fb8387f1976f2

SHA1
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

SHA256
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

SHA512
531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

Download Submit
memory/2296-21-0x0000000004A70000-0x0000000005427000-memory.dmp

Filesize
9.7MB

Download
memory/2296-17-0x0000000077E11000-0x0000000077F31000-memory.dmp

Filesize
1.1MB

Download
memory/2296-18-0x0000000074C75000-0x0000000074C76000-memory.dmp

Filesize
4KB

Download
memory/2296-16-0x0000000004A70000-0x0000000005427000-memory.dmp

Filesize
9.7MB

Download
memory/2296-35-0x0000000004A70000-0x0000000005427000-memory.dmp

Filesize
9.7MB

Download
memory/3228-19-0x0000000001660000-0x0000000002017000-memory.dmp

Filesize
9.7MB

Download
memory/3228-20-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download
memory/3228-22-0x0000000077E11000-0x0000000077F31000-memory.dmp

Filesize
1.1MB

Download
memory/3228-23-0x0000000077E98000-0x0000000077E99000-memory.dmp

Filesize
4KB

Download
memory/3228-24-0x0000000077EB5000-0x0000000077EB6000-memory.dmp

Filesize
4KB

Download
memory/3228-29-0x0000000077E11000-0x0000000077F31000-memory.dmp

Filesize
1.1MB

Download
memory/3228-28-0x0000000000400000-0x0000000001654000-memory.dmp

Filesize
18.3MB

Download