guloader | 2f423571a318924318504db10008bc4cc48afd550c59caf89b40a04c94a890f7

Analysis

max time kernel
148s
max time network
148s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
28/03/2025, 03:34

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General

Target

rpayment.scr.exe
Size

701KB
MD5

e7bbeae6c391accd957b6475dd5f0e63
SHA1

9460741f8eaff856a8163ad5a22c68dd24a0595e
SHA256

2f423571a318924318504db10008bc4cc48afd550c59caf89b40a04c94a890f7
SHA512

83feec2439997a2b9f7a2ae67966d7ab831d8eb9d8d8836746223b05c73e45e48cce3fc5d6ba420907e3c279ae2916d734b366829404786936cb93bc567f18d8
SSDEEP

12288:LR3BUIa3RVtFRe5L7lwvIuBUz3D46l0xFXc3gIwEL:V3GIQHY5vlI7Mnl0Pg73L

Score

10^/10

guloader remcos host-2 collection credential_access discovery downloader rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

Host-2

176.65.142.14:6060

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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-HM3EZ8
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 family
guloader
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
Remcos family
remcos

Detected Nirsoft tools 4 IoCs

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

resource	yara_rule
behavioral1/memory/1960-61-0x0000000000400000-0x000000000047D000-memory.dmp	Nirsoft
behavioral1/memory/1960-63-0x0000000000400000-0x000000000047D000-memory.dmp	Nirsoft
behavioral1/memory/2028-81-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1576-82-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1576-82-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/1960-61-0x0000000000400000-0x000000000047D000-memory.dmp	WebBrowserPassView
behavioral1/memory/1960-63-0x0000000000400000-0x000000000047D000-memory.dmp	WebBrowserPassView

Uses browser remote debugging 2 TTPs 1 IoCs

Can be used control the browser and steal sensitive information such as credentials and session cookies.

credential_access stealer

Steal Web Session Cookie

T1539

Modify Authentication Process

T1556

pid	Process
2560	Chrome.exe

Loads dropped DLL 2 IoCs

pid	Process
1860	rpayment.scr.exe
1860	rpayment.scr.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-1-5-21-3063565911-2056067323-3330884624-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	recover.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
4	drive.google.com
5	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2892	rpayment.scr.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1860	rpayment.scr.exe
2892	rpayment.scr.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2892 set thread context of 1960	2892	rpayment.scr.exe	37
PID 2892 set thread context of 1576	2892	rpayment.scr.exe	38
PID 2892 set thread context of 2028	2892	rpayment.scr.exe	39

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\crepe\satanerne.ini	rpayment.scr.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\106.0.5249.119\chrome_debug.log	Chrome.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\debug.log	Chrome.exe

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	rpayment.scr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rpayment.scr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	recover.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	recover.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	recover.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2892	rpayment.scr.exe
2616	Chrome.exe
2616	Chrome.exe
2616	Chrome.exe
2616	Chrome.exe
1960	recover.exe
1960	recover.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
1860	rpayment.scr.exe
2892	rpayment.scr.exe
2892	rpayment.scr.exe
2892	rpayment.scr.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeShutdownPrivilege	2616	Chrome.exe
Token: SeDebugPrivilege	2028	recover.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2892	rpayment.scr.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2892	rpayment.scr.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 1860 wrote to memory of 2892	1860	rpayment.scr.exe	28
PID 1860 wrote to memory of 2892	1860	rpayment.scr.exe	28
PID 1860 wrote to memory of 2892	1860	rpayment.scr.exe	28
PID 1860 wrote to memory of 2892	1860	rpayment.scr.exe	28
PID 1860 wrote to memory of 2892	1860	rpayment.scr.exe	28
PID 2560 wrote to memory of 2616	2560	Chrome.exe	35
PID 2560 wrote to memory of 2616	2560	Chrome.exe	35
PID 2560 wrote to memory of 2616	2560	Chrome.exe	35
PID 2560 wrote to memory of 1080	2560	Chrome.exe	36
PID 2560 wrote to memory of 1080	2560	Chrome.exe	36
PID 2560 wrote to memory of 1080	2560	Chrome.exe	36
PID 2892 wrote to memory of 1960	2892	rpayment.scr.exe	37
PID 2892 wrote to memory of 1960	2892	rpayment.scr.exe	37
PID 2892 wrote to memory of 1960	2892	rpayment.scr.exe	37
PID 2892 wrote to memory of 1960	2892	rpayment.scr.exe	37
PID 2892 wrote to memory of 1960	2892	rpayment.scr.exe	37
PID 2892 wrote to memory of 1576	2892	rpayment.scr.exe	38
PID 2892 wrote to memory of 1576	2892	rpayment.scr.exe	38
PID 2892 wrote to memory of 1576	2892	rpayment.scr.exe	38
PID 2892 wrote to memory of 1576	2892	rpayment.scr.exe	38
PID 2892 wrote to memory of 1576	2892	rpayment.scr.exe	38
PID 2892 wrote to memory of 2028	2892	rpayment.scr.exe	39
PID 2892 wrote to memory of 2028	2892	rpayment.scr.exe	39
PID 2892 wrote to memory of 2028	2892	rpayment.scr.exe	39
PID 2892 wrote to memory of 2028	2892	rpayment.scr.exe	39
PID 2892 wrote to memory of 2028	2892	rpayment.scr.exe	39

C:\Users\Admin\AppData\Local\Temp\rpayment.scr.exe
"C:\Users\Admin\AppData\Local\Temp\rpayment.scr.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1860
- C:\Users\Admin\AppData\Local\Temp\rpayment.scr.exe
  "C:\Users\Admin\AppData\Local\Temp\rpayment.scr.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:2892
- - C:\Program Files\Google\Chrome\Application\Chrome.exe
    --user-data-dir=C:\Users\Admin\AppData\Local\Temp\TmpUserData --headless --remote-debugging-port=9222 --profile-directory="Default"
    3⤵
    - Uses browser remote debugging
    - Drops file in Program Files directory
    - Suspicious use of WriteProcessMemory
    PID:2560
  - - C:\Program Files\Google\Chrome\Application\Chrome.exe
      "C:\Program Files\Google\Chrome\Application\Chrome.exe" --type=crashpad-handler --user-data-dir=C:\Users\Admin\AppData\Local\Temp\TmpUserData /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler --database=C:\Users\Admin\AppData\Local\Temp\TmpUserData\Crashpad --metrics-dir=C:\Users\Admin\AppData\Local\Temp\TmpUserData --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=106.0.5249.119 --initial-client-data=0xc8,0xcc,0xd0,0x9c,0xd4,0x7fef69e9758,0x7fef69e9768,0x7fef69e9778
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2616
  - - C:\Program Files\Google\Chrome\Application\Chrome.exe
      "C:\Program Files\Google\Chrome\Application\Chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --use-angle=swiftshader-webgl --use-gl=angle --headless --mojo-platform-channel-handle=1144 --field-trial-handle=1000,i,16011053655393923299,9768295189791135309,131072 --disable-features=PaintHolding /prefetch:8
      4⤵
      Drops file in Program Files directory
      PID:1080
- - C:\Windows\SysWOW64\recover.exe
    C:\Windows\SysWOW64\recover.exe /stext "C:\Users\Admin\AppData\Local\Temp\vwbuuwfplvy"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:1960
- - C:\Windows\SysWOW64\recover.exe
    C:\Windows\SysWOW64\recover.exe /stext "C:\Users\Admin\AppData\Local\Temp\gzgmvppjzdquio"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:1576
- - C:\Windows\SysWOW64\recover.exe
    C:\Windows\SysWOW64\recover.exe /stext "C:\Users\Admin\AppData\Local\Temp\itlxwhaknlihtuhhz"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2028

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Modify Authentication Process

T1556

Privilege Escalation

Defense Evasion

Modify Authentication Process

T1556

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Modify Authentication Process

T1556

Steal Web Session Cookie

T1539

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

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\TmpUserData\Crashpad\metadata

Filesize
114B

MD5
b88b48d45d052e9371ab9b977d931d8b

SHA1
b34b236037700055d587c3dfeefd45113b896114

SHA256
16e3dafaf355770bc31d7b6590577ba456affabc6f437b22f410b4dc25dd7fe6

SHA512
086ac198e713e01d9142f63e702a80f735850268e6c7f6c85fa4b801d332b3b6030c4fde90f5083cf092d8f07813aa46cde0604fdb096160798c44b89616030d

Download Submit
C:\Users\Admin\AppData\Local\Temp\TmpUserData\Crashpad\reports\83cb88dd-8ac0-4efe-85d9-b58e6e291c3d.dmp

Filesize
510KB

MD5
f14ea5fa8f0194163c3bc4e8484fddf0

SHA1
28c4ddaa8bb09892cdfaf394f81d70ffa0ef5a84

SHA256
9252c2d42dc4e1ca17dbd88c336f18f65b1fd0095eb6055a99e6133237bb98e6

SHA512
1816981786bcb7c20c66677969d006a5064dde15beda264be47f8c17d036fce7c3cf5dadc34b58e22e60049f904165288d1991cd576d2f3897be6532ae2196cb

Download Submit
C:\Users\Admin\AppData\Local\Temp\TmpUserData\Crashpad\settings.dat

Filesize
40B

MD5
2575f0a7d0394c3db0bd4919fe71a270

SHA1
ac6ef7703d4163d33e891a65d384089358296c84

SHA256
13fb14ed2c7e6d0db8b7d03fc702efe2a01eba0f24a8195d44bc36047ca2075d

SHA512
948ea713267b086d4804a902eaa60ffb3cadb45de557a1ab382140ce9585e66739b5b17bd1353ab318fa5beece940e88f42ae1f8d23da071c70d9ddf2303b519

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
\Users\Admin\AppData\Local\Temp\nsoA297.tmp\System.dll

Filesize
11KB

MD5
a436db0c473a087eb61ff5c53c34ba27

SHA1
65ea67e424e75f5065132b539c8b2eda88aa0506

SHA256
75ed40311875312617d6711baed0be29fcaee71031ca27a8d308a72b15a51e49

SHA512
908f46a855480af6eacb2fb64de0e60b1e04bbb10b23992e2cf38a4cbebdcd7d3928c4c022d7ad9f7479265a8f426b93eef580afec95570e654c360d62f5e08d

Download Submit
memory/1576-79-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1576-82-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1576-69-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1860-20-0x0000000077820000-0x00000000779C9000-memory.dmp

Filesize
1.7MB

Download
memory/1860-19-0x0000000077821000-0x0000000077922000-memory.dmp

Filesize
1.0MB

Download
memory/1860-18-0x00000000047F0000-0x0000000005989000-memory.dmp

Filesize
17.6MB

Download
memory/1960-60-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1960-61-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/1960-63-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/2028-78-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2028-80-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2028-81-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2892-94-0x0000000032340000-0x0000000032359000-memory.dmp

Filesize
100KB

Download
memory/2892-108-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2892-49-0x00000000335E0000-0x0000000033614000-memory.dmp

Filesize
208KB

Download
memory/2892-47-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2892-83-0x0000000077820000-0x00000000779C9000-memory.dmp

Filesize
1.7MB

Download
memory/2892-46-0x00000000014F0000-0x0000000002689000-memory.dmp

Filesize
17.6MB

Download
memory/2892-43-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2892-22-0x0000000077820000-0x00000000779C9000-memory.dmp

Filesize
1.7MB

Download
memory/2892-91-0x0000000032340000-0x0000000032359000-memory.dmp

Filesize
100KB

Download
memory/2892-95-0x0000000032340000-0x0000000032359000-memory.dmp

Filesize
100KB

Download
memory/2892-53-0x00000000335E0000-0x0000000033614000-memory.dmp

Filesize
208KB

Download
memory/2892-96-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2892-52-0x00000000335E0000-0x0000000033614000-memory.dmp

Filesize
208KB

Download
memory/2892-101-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2892-21-0x00000000014F0000-0x0000000002689000-memory.dmp

Filesize
17.6MB

Download
memory/2892-102-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2892-103-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2892-104-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2892-105-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2892-106-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2892-107-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2892-100-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2892-109-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2892-110-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2892-111-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download