guloader | 5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b

Analysis

max time kernel
151s
max time network
156s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
10/10/2023, 17:38

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General

Target

5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe
Size

1002KB
MD5

341876f1aa06d857f6e8d349ed95f6dd
SHA1

173b249c21a6fdc76d28af36f632afff8fd3bb49
SHA256

5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b
SHA512

a031cfd3dd8ed2aa46268315841aa94ffc0542d48fbb8efbda87e3d2c1ad40cf541c5ec48f34e972aa72a330cc83245c8ae6a8404194b3d190f8531ae9ab3d57
SSDEEP

24576:UeXmiSZ3YNp9jTDh1bM6mfcIuBFo7WCBYR06Nu0wz:y5+NTjJ9MjkIYo7FS0H

Score

10^/10

guloader downloader

Malware Config

Signatures

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

Loads dropped DLL 1 IoCs

pid	Process
1884	5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1884	5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe
2712	5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1884 set thread context of 2712	1884	5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe	28

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1884	5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1884 wrote to memory of 2712	1884	5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe	28
PID 1884 wrote to memory of 2712	1884	5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe	28
PID 1884 wrote to memory of 2712	1884	5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe	28
PID 1884 wrote to memory of 2712	1884	5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe	28
PID 1884 wrote to memory of 2712	1884	5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe	28
PID 1884 wrote to memory of 2712	1884	5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe	28

C:\Users\Admin\AppData\Local\Temp\5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe
"C:\Users\Admin\AppData\Local\Temp\5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1884
- C:\Users\Admin\AppData\Local\Temp\5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe
  "C:\Users\Admin\AppData\Local\Temp\5b3bdcc6a13c551a42d31a66e0546648ffa5a41dd79a4d367992785a0c259c4b_JC.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:2712

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\nsd5FEC.tmp\System.dll

Filesize
12KB

MD5
8cf2ac271d7679b1d68eefc1ae0c5618

SHA1
7cc1caaa747ee16dc894a600a4256f64fa65a9b8

SHA256
6950991102462d84fdc0e3b0ae30c95af8c192f77ce3d78e8d54e6b22f7c09ba

SHA512
ce828fb9ecd7655cc4c974f78f209d3326ba71ced60171a45a437fc3fff3bd0d69a0997adaca29265c7b5419bdea2b17f8cc8ceae1b8ce6b22b7ed9120bb5ad3

Download Submit
memory/1884-23-0x0000000003750000-0x00000000043E5000-memory.dmp

Filesize
12.6MB

Download
memory/1884-24-0x0000000003750000-0x00000000043E5000-memory.dmp

Filesize
12.6MB

Download
memory/1884-25-0x0000000077310000-0x00000000774B9000-memory.dmp

Filesize
1.7MB

Download
memory/1884-26-0x0000000077500000-0x00000000775D6000-memory.dmp

Filesize
856KB

Download
memory/1884-27-0x0000000074B20000-0x0000000074B27000-memory.dmp

Filesize
28KB

Download
memory/2712-28-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2712-29-0x0000000001470000-0x0000000002105000-memory.dmp

Filesize
12.6MB

Download
memory/2712-30-0x0000000077310000-0x00000000774B9000-memory.dmp

Filesize
1.7MB

Download
memory/2712-31-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download
memory/2712-32-0x0000000001470000-0x0000000002105000-memory.dmp

Filesize
12.6MB

Download
memory/2712-33-0x0000000000400000-0x0000000001462000-memory.dmp

Filesize
16.4MB

Download