guloader | dd72d4aef098a3d521a2cbea6e58ba477a2bad051aca8f15593adff4f3cb4eb3

Analysis

max time kernel
149s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
01-10-2024 06:53

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General

Target

?????? - ??????#9553-01.exe
Size

657KB
MD5

bdf0580d6cf3a59b15f5817437a6c5a5
SHA1

c3de15533c82e6a56975c3a5aa42ca88ec431cb2
SHA256

133891fc02269ee06eb3e6ab1f20391fe1486cd5620f766c85b8fceaf223dc84
SHA512

936570aa56de42c565b87730ca76f6e006a8278ad893a19286f61295da4656eeaaa88ae1d684af6bc961f8af9d7b74249e5ee7f4f3d78e68cb271b8860f967d0
SSDEEP

12288:5XJ5r639UgrDDIVWN+YP7924lgRgPetEsVtDZoeDl51SKd0714/A:r5r6//DIVWUYj925RgPetEsVcy51pd0x

Score

10^/10

guloader remcos remotehost collection discovery downloader rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

172.245.93.118:25000

172.245.93.118:26000

172.245.93.118:2484

172.245.93.118:2700

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
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-GFGCCE
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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

Detected Nirsoft tools 7 IoCs

Free utilities often used by attackers which can steal passwords, product keys, etc.

resource	yara_rule
behavioral2/memory/3292-65-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3292-68-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2168-67-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2168-62-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2948-59-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2948-79-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2560-80-0x0000000000470000-0x00000000016C4000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3292-65-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3292-68-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/2560-80-0x0000000000470000-0x00000000016C4000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/2948-59-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/2948-79-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 2 IoCs

pid	Process
1152	______ - ______#9553-01.exe
1152	______ - ______#9553-01.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-945322488-2060912225-3527527000-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	______ - ______#9553-01.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2560	______ - ______#9553-01.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1152	______ - ______#9553-01.exe
2560	______ - ______#9553-01.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1152 set thread context of 2560	1152	______ - ______#9553-01.exe	88
PID 2560 set thread context of 2948	2560	______ - ______#9553-01.exe	91
PID 2560 set thread context of 3292	2560	______ - ______#9553-01.exe	92
PID 2560 set thread context of 2168	2560	______ - ______#9553-01.exe	93

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	______ - ______#9553-01.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	______ - ______#9553-01.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	______ - ______#9553-01.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	______ - ______#9553-01.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	______ - ______#9553-01.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2948	______ - ______#9553-01.exe
2948	______ - ______#9553-01.exe
2168	______ - ______#9553-01.exe
2168	______ - ______#9553-01.exe
2948	______ - ______#9553-01.exe
2948	______ - ______#9553-01.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
1152	______ - ______#9553-01.exe
2560	______ - ______#9553-01.exe
2560	______ - ______#9553-01.exe
2560	______ - ______#9553-01.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2168	______ - ______#9553-01.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1152 wrote to memory of 2560	1152	______ - ______#9553-01.exe	88
PID 1152 wrote to memory of 2560	1152	______ - ______#9553-01.exe	88
PID 1152 wrote to memory of 2560	1152	______ - ______#9553-01.exe	88
PID 1152 wrote to memory of 2560	1152	______ - ______#9553-01.exe	88
PID 1152 wrote to memory of 2560	1152	______ - ______#9553-01.exe	88
PID 2560 wrote to memory of 2948	2560	______ - ______#9553-01.exe	91
PID 2560 wrote to memory of 2948	2560	______ - ______#9553-01.exe	91
PID 2560 wrote to memory of 2948	2560	______ - ______#9553-01.exe	91
PID 2560 wrote to memory of 3292	2560	______ - ______#9553-01.exe	92
PID 2560 wrote to memory of 3292	2560	______ - ______#9553-01.exe	92
PID 2560 wrote to memory of 3292	2560	______ - ______#9553-01.exe	92
PID 2560 wrote to memory of 2168	2560	______ - ______#9553-01.exe	93
PID 2560 wrote to memory of 2168	2560	______ - ______#9553-01.exe	93
PID 2560 wrote to memory of 2168	2560	______ - ______#9553-01.exe	93

C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe
"C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1152
- C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe
  "C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:2560
- - C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe
    "C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe" /stext "C:\Users\Admin\AppData\Local\Temp\rbwlqhvakabbfvjukbpffhvgvfowk"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2948
- - C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe
    "C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe" /stext "C:\Users\Admin\AppData\Local\Temp\cvbdrzgbgjtghbfybmbhiuqpvtyfmklw"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:3292
- - C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe
    "C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe" /stext "C:\Users\Admin\AppData\Local\Temp\exoo"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2168

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\BooConf.ini

Filesize
45B

MD5
8b9fc0443d7e48145e2d4b37afb2d37b

SHA1
64a5718a478a38ac262d2e46da81d0e88c122a0f

SHA256
4f743978ead44260f895c983689d718e31ca826161c447d205021a9d3e010afa

SHA512
5126da1d29f662465241c8b51b95783df3f88c8feb8bb1b65dcf354738c48aab4bfb6c0035dfe6b40fa03ae5aaba8f72f1c31343aec7d4edb9c6ebcc773cc3d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsmBDC4.tmp\System.dll

Filesize
11KB

MD5
b853d5d2361ade731e33e882707efc34

SHA1
c58b1aeabdf1cbb8334ef8797e7aceaa7a1cb6be

SHA256
f0cd96e0b6e40f92ad1aa0efacde833bae807b92fca19bf062c1cf8acf29484b

SHA512
8ea31d82ffa6f58dab5632fe72690d3a6db0be65aec85fc8a1f71626773c0974dcebefae17bcf67c4c56ef442545e985eea0b348ff6e4fc36740640092b08d69

Download Submit
C:\Users\Admin\AppData\Local\Temp\rbwlqhvakabbfvjukbpffhvgvfowk

Filesize
4KB

MD5
18db1829b27eaeed163c211f5d179d72

SHA1
4442332494cba1e012f8876ecac42126ba995bc6

SHA256
610c5ee3f0e63441521d26bc477c9618a4c5f86e93d31b31890680c69e3ecc3d

SHA512
123d68b2c84f7a52d15faa212c06f33b04a55585e2aeb16bb14df95b18c0bcf31933e5bf0c736c90bc054b9527fccb046540d3302a0f149ebeed7c6bcca0b986

Download Submit
memory/1152-30-0x00000000051D0000-0x0000000005C20000-memory.dmp

Filesize
10.3MB

Download
memory/1152-31-0x0000000077B71000-0x0000000077C91000-memory.dmp

Filesize
1.1MB

Download
memory/1152-32-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/1152-33-0x00000000051D0000-0x0000000005C20000-memory.dmp

Filesize
10.3MB

Download
memory/1152-113-0x00000000051D0000-0x0000000005C20000-memory.dmp

Filesize
10.3MB

Download
memory/2168-60-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2168-61-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2168-62-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2168-67-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2560-47-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-96-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-45-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-46-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-43-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-48-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-49-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-50-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-53-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-54-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-55-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-34-0x00000000016D0000-0x0000000002120000-memory.dmp

Filesize
10.3MB

Download
memory/2560-108-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-107-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-106-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-73-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-42-0x0000000077B71000-0x0000000077C91000-memory.dmp

Filesize
1.1MB

Download
memory/2560-38-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-74-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-37-0x00000000016D0000-0x0000000002120000-memory.dmp

Filesize
10.3MB

Download
memory/2560-36-0x0000000077C15000-0x0000000077C16000-memory.dmp

Filesize
4KB

Download
memory/2560-105-0x00000000004A4000-0x00000000004A5000-memory.dmp

Filesize
4KB

Download
memory/2560-104-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-75-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-102-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-101-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-80-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-81-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-82-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-84-0x0000000032E30000-0x0000000032E49000-memory.dmp

Filesize
100KB

Download
memory/2560-88-0x0000000032E30000-0x0000000032E49000-memory.dmp

Filesize
100KB

Download
memory/2560-87-0x0000000032E30000-0x0000000032E49000-memory.dmp

Filesize
100KB

Download
memory/2560-35-0x0000000077BF8000-0x0000000077BF9000-memory.dmp

Filesize
4KB

Download
memory/2560-89-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-90-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-91-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-92-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-93-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-94-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-95-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-44-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-97-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-98-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-99-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2560-100-0x0000000000470000-0x00000000016C4000-memory.dmp

Filesize
18.3MB

Download
memory/2948-79-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2948-57-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2948-59-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2948-56-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3292-58-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3292-68-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3292-64-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3292-65-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download