guloader | 5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9ab

Analysis

max time kernel
151s
max time network
123s
platform
windows7_x64
resource
win7-20231023-en
resource tags

arch:x64arch:x86image:win7-20231023-enlocale:en-usos:windows7-x64system
submitted
24-10-2023 19:58

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General

Target

NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe
Size

1.0MB
MD5

002b5b4dc69a87e58c8cfd17c3e8a942
SHA1

d2e27a221356918b75569cd9e36184f7d8880604
SHA256

5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9ab
SHA512

84c9c1396b2ff403a4aacd8cfa18d13e4fde9ddafaa08bbf463fc01a47e0c73447a27353a62f243e335cf01a3cf5860804b28b86ea6b985d68e1da105ff08161
SSDEEP

24576:w2mvDENPmTMDi/eUPdToG/xpzWEGgsjzAaAbWuUV04e:+vDEpAveUZTzhG3sa+3UO4e

Score

10^/10

guloader remcos crypted downloader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Crypted

ourt2949aslumes9.duckdns.org:2401

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
false
keylog_crypt
false
keylog_file
paqlgkfs.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
ourvbpld-RBN2WW
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
take_screenshot_option
false
take_screenshot_time
5

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Loads dropped DLL 2 IoCs

Processes:

NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe

pid	process
2184	NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe
2184	NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

wab.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3425689832-2386927309-2650718742-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Fagsalenes = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Sugefddernes\\transformerne.exe"	wab.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

Processes:

wab.exe

pid process

2716 wab.exe
2716 wab.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exewab.exe

pid process

2184 NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe
2716 wab.exe

pid	process
2716	wab.exe
2716	wab.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe

description	pid	process	target process
PID 2184 set thread context of 2716	2184	NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe	wab.exe

Drops file in Windows directory 1 IoCs

Processes:

NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe

description	ioc	process
File opened for modification	C:\Windows\resources\Kikkertsigtet243\scorer.acr	NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.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:

NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe

pid process

2184 NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe

Suspicious use of WriteProcessMemory 6 IoCs

Processes:

NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe

description	pid	process	target process
PID 2184 wrote to memory of 2716	2184	NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe	wab.exe
PID 2184 wrote to memory of 2716	2184	NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe	wab.exe
PID 2184 wrote to memory of 2716	2184	NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe	wab.exe
PID 2184 wrote to memory of 2716	2184	NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe	wab.exe
PID 2184 wrote to memory of 2716	2184	NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe	wab.exe
PID 2184 wrote to memory of 2716	2184	NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe	wab.exe

C:\Users\Admin\AppData\Local\Temp\NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:2184

C:\Program Files (x86)\windows mail\wab.exe
"C:\Users\Admin\AppData\Local\Temp\NEAS.5caabf39bc8f07554b249ff09f23b3551644485172384cd1215cfe967582d9abexe_JC.exe"
2⤵
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:2716

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsi4FE6.tmp\System.dll
Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
\Users\Admin\AppData\Local\Temp\nsi4FE6.tmp\System.dll
Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
\Users\Admin\AppData\Local\Temp\nsi4FE6.tmp\System.dll
Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
memory/2184-27-0x0000000076DF0000-0x0000000076F99000-memory.dmp

Filesize
1.7MB

Download
memory/2184-28-0x0000000076FE0000-0x00000000770B6000-memory.dmp

Filesize
856KB

Download
memory/2184-29-0x0000000010000000-0x0000000010006000-memory.dmp

Filesize
24KB

Download
memory/2716-30-0x0000000076DF0000-0x0000000076F99000-memory.dmp

Filesize
1.7MB

Download
memory/2716-32-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-33-0x0000000000800000-0x00000000042B1000-memory.dmp

Filesize
58.7MB

Download
memory/2716-35-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-34-0x0000000000800000-0x00000000042B1000-memory.dmp

Filesize
58.7MB

Download
memory/2716-36-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-37-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-38-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-39-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-40-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-41-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-42-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-43-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-44-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-45-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-46-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-47-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-48-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-49-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-50-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-51-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-52-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-53-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-54-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-55-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-56-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-57-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-58-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-59-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-60-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-61-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-62-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-65-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-67-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-68-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-69-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-70-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-71-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-72-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-73-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-74-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-75-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-76-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-77-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-78-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-79-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-80-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-81-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-82-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-83-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-84-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-85-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-86-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-87-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-88-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-89-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-90-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-91-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-92-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-93-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-94-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-95-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-96-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download
memory/2716-97-0x0000000072370000-0x00000000733D2000-memory.dmp

Filesize
16.4MB

Download