guloader | f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1c

Analysis

max time kernel
119s
max time network
120s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
29-11-2024 05:34

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General

Target

f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe
Size

633KB
MD5

1c95531a943e71d70afbb794ced49070
SHA1

6e0ad1a65c6c318e308a17a736374aeec23419e1
SHA256

f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1c
SHA512

f8227f7828548d3284da309646f39c5f8c7184bdfdaa984ceca1ac32340f53be9f7e7eee77212fa6192b03c677f7323775f822b916a076caf74a7cf173940021
SSDEEP

12288:g33KGpVvqisW42Vj4Y1x6NqWHXzVhUIxFYv7PFBUJ/uLlbC/k:6VDTFrQRRxs7hLlT

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 1 IoCs

pid	Process
2420	f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2420	f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe
2516	f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2420 set thread context of 2516	2420	f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe	30

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	f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2420	f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2420 wrote to memory of 2516	2420	f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe	30
PID 2420 wrote to memory of 2516	2420	f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe	30
PID 2420 wrote to memory of 2516	2420	f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe	30
PID 2420 wrote to memory of 2516	2420	f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe	30
PID 2420 wrote to memory of 2516	2420	f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe	30
PID 2420 wrote to memory of 2516	2420	f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe	30

C:\Users\Admin\AppData\Local\Temp\f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe
"C:\Users\Admin\AppData\Local\Temp\f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.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:2420
- C:\Users\Admin\AppData\Local\Temp\f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe
  "C:\Users\Admin\AppData\Local\Temp\f35fac8e2c032a3c86b0e53fd04dc1007d951b13436e9b120ccdb7f4f9903b1cN.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  PID:2516

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

\Users\Admin\AppData\Local\Temp\nst9686.tmp\System.dll

Filesize
12KB

MD5
12b140583e3273ee1f65016becea58c4

SHA1
92df24d11797fefd2e1f8d29be9dfd67c56c1ada

SHA256
014f1dfeb842cf7265a3644bc6903c592abe9049bfc7396829172d3d72c4d042

SHA512
49ffdfa1941361430b6acb3555fd3aa05e4120f28cbdf7ceaa2af5937d0b8cccd84471cf63f06f97cf203b4aa20f226bdad082e9421b8e6b62ab6e1e9fc1e68a

Download Submit
memory/2420-17-0x0000000002F70000-0x0000000005FCD000-memory.dmp

Filesize
48.4MB

Download
memory/2420-18-0x00000000770D1000-0x00000000771D2000-memory.dmp

Filesize
1.0MB

Download
memory/2420-20-0x00000000770D0000-0x0000000077279000-memory.dmp

Filesize
1.7MB

Download
memory/2420-19-0x0000000002F70000-0x0000000005FCD000-memory.dmp

Filesize
48.4MB

Download
memory/2420-29-0x0000000002F70000-0x0000000005FCD000-memory.dmp

Filesize
48.4MB

Download
memory/2516-21-0x00000000014D0000-0x000000000452D000-memory.dmp

Filesize
48.4MB

Download
memory/2516-22-0x00000000770D0000-0x0000000077279000-memory.dmp

Filesize
1.7MB

Download
memory/2516-23-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download