guloader | b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
06/04/2024, 01:31

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General

Target

b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe
Size

732KB
MD5

8ff6d5c20b09737261248a3335ce8898
SHA1

764fcf893e02ec25e46feac2cb88ae88b32be3a7
SHA256

b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59
SHA512

59a765ea56a7dd821f1f059d65785daefba05bb563be8fc82e71577be2ba12a224f0adc761b06188c6a437860cb91482b468b657dd4aa33f9b2fb9f525d87b2e
SSDEEP

12288:Mo9HOyVpvKsdkVDik53lldigcOmTywmHBjLrAI:MGuyVpv7dkVDJ5VlcgcAwOrAI

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
4380	b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\rnnebrs\skifteres.ind	b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4380	b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe
3056	b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4380 set thread context of 3056	4380	b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe	96

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
4380	b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4380 wrote to memory of 3056	4380	b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe	96
PID 4380 wrote to memory of 3056	4380	b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe	96
PID 4380 wrote to memory of 3056	4380	b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe	96
PID 4380 wrote to memory of 3056	4380	b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe	96
PID 4380 wrote to memory of 3056	4380	b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe	96

C:\Users\Admin\AppData\Local\Temp\b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe
"C:\Users\Admin\AppData\Local\Temp\b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4380
- C:\Users\Admin\AppData\Local\Temp\b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe
  "C:\Users\Admin\AppData\Local\Temp\b11eac916daabd2924e16d9f4bac0b8760f608c8f23c9e98d2b0240526a00c59.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:3056

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

C:\Users\Admin\AppData\Local\Temp\nse5247.tmp\System.dll

Filesize
12KB

MD5
0d7ad4f45dc6f5aa87f606d0331c6901

SHA1
48df0911f0484cbe2a8cdd5362140b63c41ee457

SHA256
3eb38ae99653a7dbc724132ee240f6e5c4af4bfe7c01d31d23faf373f9f2eaca

SHA512
c07de7308cb54205e8bd703001a7fe4fd7796c9ac1b4bb330c77c872bf712b093645f40b80ce7127531fe6746a5b66e18ea073ab6a644934abed9bb64126fea9

Download Submit
memory/3056-12-0x0000000001710000-0x000000000245C000-memory.dmp

Filesize
13.3MB

Download
memory/3056-14-0x0000000077328000-0x0000000077329000-memory.dmp

Filesize
4KB

Download
memory/3056-15-0x00000000004B0000-0x0000000001704000-memory.dmp

Filesize
18.3MB

Download
memory/3056-16-0x0000000077345000-0x0000000077346000-memory.dmp

Filesize
4KB

Download
memory/3056-18-0x0000000001710000-0x000000000245C000-memory.dmp

Filesize
13.3MB

Download
memory/3056-20-0x00000000772A1000-0x00000000773C1000-memory.dmp

Filesize
1.1MB

Download
memory/4380-9-0x0000000004A50000-0x000000000579C000-memory.dmp

Filesize
13.3MB

Download
memory/4380-10-0x00000000772A1000-0x00000000773C1000-memory.dmp

Filesize
1.1MB

Download
memory/4380-11-0x0000000074100000-0x0000000074107000-memory.dmp

Filesize
28KB

Download
memory/4380-13-0x0000000004A50000-0x000000000579C000-memory.dmp

Filesize
13.3MB

Download
memory/4380-24-0x0000000004A50000-0x000000000579C000-memory.dmp

Filesize
13.3MB

Download