guloader | 28641ebd6bbdf83f407430885d6f1eba9a4f9cc23fd1f0b941835bb911d98b6e

Analysis

max time kernel
140s
max time network
145s
platform
windows10-2004_x64
resource
win10v2004-20231023-en
resource tags

arch:x64arch:x86image:win10v2004-20231023-enlocale:en-usos:windows10-2004-x64system
submitted
23-10-2023 15:37

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General

Target

SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe
Size

1.0MB
MD5

fbe0ed03d85eeb8d4d18110e0c9baf94
SHA1

8b8b2ce3576688ab751f654cecf84e6c7ec329e5
SHA256

28641ebd6bbdf83f407430885d6f1eba9a4f9cc23fd1f0b941835bb911d98b6e
SHA512

4ad0548ff90254cbb4e2170adbcb2336a1de9dac7ddefd8c2afe3013bbdb4cf258204bf8ed365b7e0f4bf60386b1b06471834038cdf81b5a5796759335ecc4c2
SSDEEP

24576:gsdpWoBmlSBK5PGmptFpsa9JYf4SZbAOhURWImqo9T1Qn:90o4lS053dsuJw4SKOhUCqOQ

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:

SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe

pid process

1320 SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe
1320 SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe

pid	process
1320	SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe
1320	SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.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-1-5-21-3125601242-331447593-1512828465-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Critize = "C:\\Users\\Admin\\AppData\\Local\\Temp\\septemberer\\Berberin.exe"	wab.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

Processes:

wab.exe

pid process

2328 wab.exe
2328 wab.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exewab.exe

pid process

1320 SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe
2328 wab.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe

description pid process target process

PID 1320 set thread context of 2328 1320 SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe wab.exe
Drops file in Windows directory 1 IoCs

Processes:

SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe

description ioc process

File opened for modification C:\Windows\resources\Kikkertsigtet243\scorer.acr SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

3856 2328 WerFault.exe wab.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe

pid process

1320 SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

wab.exe

pid process

2328 wab.exe

pid	process
2328	wab.exe
2328	wab.exe

pid	process
1320	SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe
2328	wab.exe

description	pid	process	target process
PID 1320 set thread context of 2328	1320	SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe	wab.exe

description	ioc	process
File opened for modification	C:\Windows\resources\Kikkertsigtet243\scorer.acr	SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe

pid	pid_target	process	target process
3856	2328	WerFault.exe	wab.exe

pid	process
1320	SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe

pid	process
2328	wab.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe

description	pid	process	target process
PID 1320 wrote to memory of 2328	1320	SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe	wab.exe
PID 1320 wrote to memory of 2328	1320	SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe	wab.exe
PID 1320 wrote to memory of 2328	1320	SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe	wab.exe
PID 1320 wrote to memory of 2328	1320	SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe	wab.exe
PID 1320 wrote to memory of 2328	1320	SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe	wab.exe

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.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:1320

C:\Program Files (x86)\windows mail\wab.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.W32.Trojan.SLJK-2619.17130.exe"
2⤵
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetWindowsHookEx
PID:2328

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2328 -s 1204
3⤵
- Program crash
PID:3856

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 192 -p 2328 -ip 2328
1⤵
PID:2340

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nshCAA5.tmp\System.dll
Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
C:\Users\Admin\AppData\Local\Temp\nshCAA5.tmp\System.dll
Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
C:\Users\Admin\AppData\Local\Temp\nshCAA5.tmp\System.dll
Filesize
11KB

MD5
ee260c45e97b62a5e42f17460d406068

SHA1
df35f6300a03c4d3d3bd69752574426296b78695

SHA256
e94a1f7bcd7e0d532b660d0af468eb3321536c3efdca265e61f9ec174b1aef27

SHA512
a98f350d17c9057f33e5847462a87d59cbf2aaeda7f6299b0d49bb455e484ce4660c12d2eb8c4a0d21df523e729222bbd6c820bf25b081bc7478152515b414b3

Download Submit
memory/1320-25-0x0000000003230000-0x0000000006070000-memory.dmp

Filesize
46.2MB

Download
memory/1320-26-0x0000000003230000-0x0000000006070000-memory.dmp

Filesize
46.2MB

Download
memory/1320-27-0x00000000773A1000-0x00000000774C1000-memory.dmp

Filesize
1.1MB

Download
memory/1320-28-0x00000000773A1000-0x00000000774C1000-memory.dmp

Filesize
1.1MB

Download
memory/1320-29-0x0000000010000000-0x0000000010006000-memory.dmp

Filesize
24KB

Download
memory/2328-30-0x0000000000680000-0x00000000034C0000-memory.dmp

Filesize
46.2MB

Download
memory/2328-31-0x0000000000680000-0x00000000034C0000-memory.dmp

Filesize
46.2MB

Download
memory/2328-32-0x0000000077428000-0x0000000077429000-memory.dmp

Filesize
4KB

Download
memory/2328-33-0x00000000773A1000-0x00000000774C1000-memory.dmp

Filesize
1.1MB

Download
memory/2328-35-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-36-0x0000000000680000-0x00000000034C0000-memory.dmp

Filesize
46.2MB

Download
memory/2328-38-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-37-0x0000000000680000-0x00000000034C0000-memory.dmp

Filesize
46.2MB

Download
memory/2328-39-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-40-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-41-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-42-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-43-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-44-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-45-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-46-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-47-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-50-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-51-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-52-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-53-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-54-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-56-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-57-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-58-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-59-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-60-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-61-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-62-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-63-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-64-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-65-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-66-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-67-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-68-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-70-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-71-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-72-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-73-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-74-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-75-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-76-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-77-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-78-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-79-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-80-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-81-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-82-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-83-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-84-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-89-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-90-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-91-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-92-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-93-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-94-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-95-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-96-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-97-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-98-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-99-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-101-0x0000000072F80000-0x00000000741D4000-memory.dmp

Filesize
18.3MB

Download
memory/2328-113-0x0000000000680000-0x00000000034C0000-memory.dmp

Filesize
46.2MB

Download