guloader | a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290

Analysis

max time kernel
149s
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
15/06/2024, 01:59

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe
Size

588KB
MD5

ff3f9946159ede1ea69dc8e74991c5eb
SHA1

790a8dd8acac3557bff7d43511a176ad57faadc8
SHA256

a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290
SHA512

b22399c5fad7f4f5433fbc58fb8ed10de22c49c3a4d6689d82eb1959411485e3759199bd30979170bc5f6a03b5f1fe6b60fd0e2d1fd8d9b82aade49d9a220978
SSDEEP

12288:OiR6qChjvVW+/cfkyZ8421XXFwXo8fDZk8K/H0zLjT8o/h:OiRwvL2kyI1XXFwZ2ujgo/h

Score

10^/10

guloader downloader

Malware Config

Signatures

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

Loads dropped DLL 2 IoCs

pid	Process
4164	a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe
4164	a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4164	a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe
3656	a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4164 set thread context of 3656	4164	a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe	85

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
4164	a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4164 wrote to memory of 3656	4164	a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe	85
PID 4164 wrote to memory of 3656	4164	a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe	85
PID 4164 wrote to memory of 3656	4164	a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe	85
PID 4164 wrote to memory of 3656	4164	a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe	85
PID 4164 wrote to memory of 3656	4164	a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe	85

C:\Users\Admin\AppData\Local\Temp\a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe
"C:\Users\Admin\AppData\Local\Temp\a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4164
- C:\Users\Admin\AppData\Local\Temp\a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe
  "C:\Users\Admin\AppData\Local\Temp\a8b78aa0870056b9eb000f19d4aa732acd3b3657c905ca333ca772a0e9e31290.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  PID:3656

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

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nsv3C00.tmp\System.dll

Filesize
12KB

MD5
d968cb2b98b83c03a9f02dd9b8df97dc

SHA1
d784c9b7a92dce58a5038beb62a48ff509e166a0

SHA256
a4ec98011ef99e595912718c1a1bf1aa67bfc2192575729d42f559d01f67b95c

SHA512
2ee41dc68f329a1519a8073ece7d746c9f3bf45d8ef3b915deb376af37e26074134af5f83c8af0fe0ab227f0d1acca9f37e5ca7ae37c46c3bcc0331fe5e2b97e

Download Submit
C:\Users\Public\Music\kolorister.lnk

Filesize
984B

MD5
46603334df98ea8d54ef5a1a2dab2acb

SHA1
c441067a0e8566989de4304510da4cdba91be51d

SHA256
007358a20fb094651eedcf66056f0580996927b12bfd1d99676bbb80d189f87b

SHA512
2cf8ca5b9ba9b2a47a25f750bf49dd0c8fa9bea515c3c209e962390fcae8fe3ce7cb6f5fc604f73f2eda78349be790ce9c01306b3e5eeb94d306f767ce0d1c26

Download Submit
memory/3656-239-0x0000000001850000-0x0000000002A0A000-memory.dmp

Filesize
17.7MB

Download
memory/3656-240-0x0000000077C08000-0x0000000077C09000-memory.dmp

Filesize
4KB

Download
memory/3656-242-0x00000000005F0000-0x0000000001844000-memory.dmp

Filesize
18.3MB

Download
memory/3656-243-0x0000000001850000-0x0000000002A0A000-memory.dmp

Filesize
17.7MB

Download
memory/3656-245-0x0000000077B81000-0x0000000077CA1000-memory.dmp

Filesize
1.1MB

Download
memory/4164-236-0x0000000004A50000-0x0000000005C0A000-memory.dmp

Filesize
17.7MB

Download
memory/4164-237-0x0000000077B81000-0x0000000077CA1000-memory.dmp

Filesize
1.1MB

Download
memory/4164-238-0x00000000749E5000-0x00000000749E6000-memory.dmp

Filesize
4KB

Download
memory/4164-241-0x0000000004A50000-0x0000000005C0A000-memory.dmp

Filesize
17.7MB

Download
memory/4164-250-0x0000000004A50000-0x0000000005C0A000-memory.dmp

Filesize
17.7MB

Download