guloader | c84cb91eb22d6788676f2114ad023f2caa70c8ed5ad964e9e7d83056b80ca83a

Analysis

max time kernel
148s
max time network
144s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
28/03/2025, 13:20

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General

Target

payment.scr
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 9 IoCs

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

resource	yara_rule
behavioral1/memory/392-77-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/392-82-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1588-76-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/392-79-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/1588-78-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2088-71-0x0000000000400000-0x000000000047D000-memory.dmp	Nirsoft
behavioral1/memory/2088-87-0x0000000000400000-0x000000000047D000-memory.dmp	Nirsoft
behavioral1/memory/2088-70-0x0000000000400000-0x000000000047D000-memory.dmp	Nirsoft
behavioral1/memory/1588-99-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/1588-76-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/1588-78-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/1588-99-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2088-71-0x0000000000400000-0x000000000047D000-memory.dmp	WebBrowserPassView
behavioral1/memory/2088-87-0x0000000000400000-0x000000000047D000-memory.dmp	WebBrowserPassView
behavioral1/memory/2088-70-0x0000000000400000-0x000000000047D000-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
1608	Chrome.exe

Loads dropped DLL 2 IoCs

pid	Process
532	payment.scr
532	payment.scr

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-1-5-21-2039016743-699959520-214465309-1000\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
2152	payment.scr

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
532	payment.scr
2152	payment.scr

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2152 set thread context of 2088	2152	payment.scr	38
PID 2152 set thread context of 1588	2152	payment.scr	39
PID 2152 set thread context of 392	2152	payment.scr	40

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\crepe\satanerne.ini	payment.scr
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	recover.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	payment.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	payment.scr

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
2152	payment.scr
1964	Chrome.exe
1964	Chrome.exe
1964	Chrome.exe
1964	Chrome.exe
2088	recover.exe
2088	recover.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
532	payment.scr
2152	payment.scr
2152	payment.scr
2152	payment.scr

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeShutdownPrivilege	1964	Chrome.exe
Token: SeDebugPrivilege	392	recover.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2152	payment.scr

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2152	payment.scr

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 532 wrote to memory of 2152	532	payment.scr	31
PID 532 wrote to memory of 2152	532	payment.scr	31
PID 532 wrote to memory of 2152	532	payment.scr	31
PID 532 wrote to memory of 2152	532	payment.scr	31
PID 532 wrote to memory of 2152	532	payment.scr	31
PID 1608 wrote to memory of 1964	1608	Chrome.exe	36
PID 1608 wrote to memory of 1964	1608	Chrome.exe	36
PID 1608 wrote to memory of 1964	1608	Chrome.exe	36
PID 1608 wrote to memory of 1932	1608	Chrome.exe	37
PID 1608 wrote to memory of 1932	1608	Chrome.exe	37
PID 1608 wrote to memory of 1932	1608	Chrome.exe	37
PID 2152 wrote to memory of 2088	2152	payment.scr	38
PID 2152 wrote to memory of 2088	2152	payment.scr	38
PID 2152 wrote to memory of 2088	2152	payment.scr	38
PID 2152 wrote to memory of 2088	2152	payment.scr	38
PID 2152 wrote to memory of 1588	2152	payment.scr	39
PID 2152 wrote to memory of 1588	2152	payment.scr	39
PID 2152 wrote to memory of 1588	2152	payment.scr	39
PID 2152 wrote to memory of 1588	2152	payment.scr	39
PID 2152 wrote to memory of 392	2152	payment.scr	40
PID 2152 wrote to memory of 392	2152	payment.scr	40
PID 2152 wrote to memory of 392	2152	payment.scr	40
PID 2152 wrote to memory of 392	2152	payment.scr	40

C:\Users\Admin\AppData\Local\Temp\payment.scr
"C:\Users\Admin\AppData\Local\Temp\payment.scr" /S
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:532
- C:\Users\Admin\AppData\Local\Temp\payment.scr
  "C:\Users\Admin\AppData\Local\Temp\payment.scr" /S
  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:2152
- - 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:1608
  - - 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,0xd4,0x7fef6809758,0x7fef6809768,0x7fef6809778
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1964
  - - 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=1120 --field-trial-handle=992,i,16225468257427239619,15570927645942720158,131072 --disable-features=PaintHolding /prefetch:8
      4⤵
      Drops file in Program Files directory
      PID:1932
- - C:\Windows\SysWOW64\recover.exe
    C:\Windows\SysWOW64\recover.exe /stext "C:\Users\Admin\AppData\Local\Temp\zngosziluoxwpguiuwyxeowlosrfjvzlpu"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2088
- - C:\Windows\SysWOW64\recover.exe
    C:\Windows\SysWOW64\recover.exe /stext "C:\Users\Admin\AppData\Local\Temp\jhlhtrb"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:1588
- - C:\Windows\SysWOW64\recover.exe
    C:\Windows\SysWOW64\recover.exe /stext "C:\Users\Admin\AppData\Local\Temp\ujyztcmgee"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:392

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
130B

MD5
5a7f08e1ba4d9654dc17addfd933ab77

SHA1
440ba7b9b0c2e95eafb58b627750faa0505c8c7b

SHA256
d5655e2f76dde6079efb120710db84436b439c05f70d1d74587ec111ef05444e

SHA512
ee8c2c811e3c929c950b6b83923b84271e4e795edaa4a4d6f0bd8c1212306e53f884f8d5e85d49bce6937f4bc2c66e6b5e57289541676bd006fdfd71e8cc6713

Download Submit
C:\Users\Admin\AppData\Local\Temp\TmpUserData\Crashpad\reports\01645eab-9009-407f-b1bf-9d51cd534fbc.dmp

Filesize
642KB

MD5
5a0e0f4aac278a7ba79344ecf713c82b

SHA1
e1fc55cb60c3576ede4edf0c668957f86b154c63

SHA256
d303b08231ab86ddcfbe3606ca72595b613c69317f54d1f30c608cdfaab2b37b

SHA512
8ed62826902a67b46bb328155fcb3e46f17f29b940325aabd44febbe797a47a2056ae73598caaec6245d46056ea363f17d30ca1c24fc85393f6000b7b964bef6

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

Filesize
40B

MD5
c528cf4468af87a50300b655aeffa3db

SHA1
985623c8630754533eefb6539b6962e4adaf0147

SHA256
70707234c0c23bda83dd61a6db37f189730d2b5eca010f822d36c24be8a5a66a

SHA512
a5502128177718ed007800d5382f14c1c70d561d853869985a7688878cd9a3854febbb8c2481d337e19298e61bde496a99a7f125e37aef5eb767f9395bae5874

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

Filesize
40B

MD5
df1292e7c6f93ced1c6a4f053ae3d689

SHA1
c43325398f85fc0a56353d797f42aef6cf1c6959

SHA256
d6bda9a303a2a0045fd16f879a1a50292abfa867dde54946e07928f468f038c6

SHA512
b7cd75a6aaacb5ee45ebac132e2825e817f7bc5200324900f2d35abd4d4a25eff964422564c590d122ed720f9c85118a18f8e1f9f84b3f6e03c3e09c04a48a23

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
\Users\Admin\AppData\Local\Temp\nsjD902.tmp\System.dll

Filesize
11KB

MD5
a436db0c473a087eb61ff5c53c34ba27

SHA1
65ea67e424e75f5065132b539c8b2eda88aa0506

SHA256
75ed40311875312617d6711baed0be29fcaee71031ca27a8d308a72b15a51e49

SHA512
908f46a855480af6eacb2fb64de0e60b1e04bbb10b23992e2cf38a4cbebdcd7d3928c4c022d7ad9f7479265a8f426b93eef580afec95570e654c360d62f5e08d

Download Submit
memory/392-79-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/392-82-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/392-74-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/392-75-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/392-77-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/532-20-0x00000000772E0000-0x0000000077489000-memory.dmp

Filesize
1.7MB

Download
memory/532-19-0x00000000772E1000-0x00000000773E2000-memory.dmp

Filesize
1.0MB

Download
memory/532-18-0x0000000003AF0000-0x0000000004C89000-memory.dmp

Filesize
17.6MB

Download
memory/1588-99-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1588-76-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1588-73-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1588-78-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/1588-72-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2088-70-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/2088-87-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/2088-71-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/2152-52-0x00000000322C0000-0x00000000322F4000-memory.dmp

Filesize
208KB

Download
memory/2152-53-0x00000000322C0000-0x00000000322F4000-memory.dmp

Filesize
208KB

Download
memory/2152-49-0x00000000322C0000-0x00000000322F4000-memory.dmp

Filesize
208KB

Download
memory/2152-47-0x00000000014F0000-0x0000000002689000-memory.dmp

Filesize
17.6MB

Download
memory/2152-43-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2152-42-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2152-22-0x00000000772E0000-0x0000000077489000-memory.dmp

Filesize
1.7MB

Download
memory/2152-101-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2152-106-0x0000000032430000-0x0000000032449000-memory.dmp

Filesize
100KB

Download
memory/2152-105-0x0000000032430000-0x0000000032449000-memory.dmp

Filesize
100KB

Download
memory/2152-102-0x0000000032430000-0x0000000032449000-memory.dmp

Filesize
100KB

Download
memory/2152-21-0x00000000014F0000-0x0000000002689000-memory.dmp

Filesize
17.6MB

Download
memory/2152-110-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2152-111-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2152-112-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2152-113-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2152-114-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2152-115-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2152-116-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2152-117-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2152-118-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download
memory/2152-121-0x0000000000480000-0x00000000014E2000-memory.dmp

Filesize
16.4MB

Download