guloader | a7afb33b403ad33bf2421901d5ed9aad4e7ee362f343a86f313897713f595625

Analysis

max time kernel
147s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
28-06-2024 10:07

Target

4.exe
Size

849KB
MD5

1e6cb04df9502e8cb007a482c663bc9d
SHA1

f53cf395db96bca467de325491ac09cfb8d388fc
SHA256

a7afb33b403ad33bf2421901d5ed9aad4e7ee362f343a86f313897713f595625
SHA512

8c962d165a951644c0c5bf52b95159185a49657facd1f6b3c443fe3dc2af11ab6af8c3e511a37e2581e2cf3e27b7671b0bc5b7762a3fb38b3a273afee6790e57
SSDEEP

12288:hcIjd3nQIQsk3na+QidVt1+DXuY4Dc25c2YDX8Y/RN4Yx6m:hcIjUna3imz4DTg5vl

Score

10^/10

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Loads dropped DLL 1 IoCs

Processes:

4.exe

pid process

2360 4.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

4.exe4.exe

pid process

2360 4.exe
1684 4.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

4.exe

description pid process target process

PID 2360 set thread context of 1684 2360 4.exe 4.exe
Drops file in Windows directory 1 IoCs

Processes:

4.exe

description ioc process

File opened for modification C:\Windows\reassigned\sandi.ini 4.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

4.exe

pid process

2360 4.exe

pid	process
2360	4.exe

pid	process
2360	4.exe
1684	4.exe

description	pid	process	target process
PID 2360 set thread context of 1684	2360	4.exe	4.exe

description	ioc	process
File opened for modification	C:\Windows\reassigned\sandi.ini	4.exe

pid	process
2360	4.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

4.exe

description	pid	process	target process
PID 2360 wrote to memory of 1684	2360	4.exe	4.exe
PID 2360 wrote to memory of 1684	2360	4.exe	4.exe
PID 2360 wrote to memory of 1684	2360	4.exe	4.exe
PID 2360 wrote to memory of 1684	2360	4.exe	4.exe
PID 2360 wrote to memory of 1684	2360	4.exe	4.exe

C:\Users\Admin\AppData\Local\Temp\4.exe
"C:\Users\Admin\AppData\Local\Temp\4.exe"
2⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:1684

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

C:\Users\Admin\AppData\Local\Temp\nsy5054.tmp\System.dll
Filesize
11KB

MD5
55a26d7800446f1373056064c64c3ce8

SHA1
80256857e9a0a9c8897923b717f3435295a76002

SHA256
904fd5481d72f4e03b01a455f848dedd095d0fb17e33608e0d849f5196fb6ff8

SHA512
04b8ab7a85c26f188c0a06f524488d6f2ac2884bf107c860c82e94ae12c3859f825133d78338fd2b594dfc48f7dc9888ae76fee786c6252a5c77c88755128a5b

Download Submit
memory/1684-27-0x0000000001700000-0x000000000270D000-memory.dmp

Filesize
16.1MB

Download
memory/1684-28-0x0000000077588000-0x0000000077589000-memory.dmp

Filesize
4KB

Download
memory/1684-30-0x00000000775A5000-0x00000000775A6000-memory.dmp

Filesize
4KB

Download
memory/1684-31-0x00000000004A0000-0x00000000016F4000-memory.dmp

Filesize
18.3MB

Download
memory/1684-32-0x0000000001700000-0x000000000270D000-memory.dmp

Filesize
16.1MB

Download
memory/1684-34-0x0000000077501000-0x0000000077621000-memory.dmp

Filesize
1.1MB

Download
memory/2360-24-0x0000000004A10000-0x0000000005A1D000-memory.dmp

Filesize
16.1MB

Download
memory/2360-25-0x0000000077501000-0x0000000077621000-memory.dmp

Filesize
1.1MB

Download
memory/2360-26-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/2360-29-0x0000000004A10000-0x0000000005A1D000-memory.dmp

Filesize
16.1MB

Download
memory/2360-39-0x0000000004A10000-0x0000000005A1D000-memory.dmp

Filesize
16.1MB

Download