guloader | b5486818c1913895b913ace02e94fee62a6468b3df96abd6c75c863499873dd2

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
05-12-2024 11:29

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General

Target

scan_241205-801_draft_PO.exe
Size

1.2MB
MD5

16df1bbb45f31ef099862d1df04b9741
SHA1

e9c1056bc30a3817d84656a944b39190cbb1b7c9
SHA256

b5486818c1913895b913ace02e94fee62a6468b3df96abd6c75c863499873dd2
SHA512

083ed41b277bfdaa0876c756868acb0286d22eb498aa4f18638a258a86559ddc6bce35d777b259f71b7d392291d5ee0ad346671931c562c89bafc4c555d877cb
SSDEEP

24576:tmwFwYo/knJ5vkeSTejf+WNvXgd93W0wbenPc15QClzZ:gkVosnJSeSTw+WNfgdlZ0iPc/Q+zZ

Score

10^/10

guloader remcos remotehost collection discovery downloader rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

162.251.122.87:2404

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-UOMZ21
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 7 IoCs

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

resource	yara_rule
behavioral2/memory/4168-606-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4168-605-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4516-603-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4168-600-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4516-596-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2776-595-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2776-610-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4516-603-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/4516-596-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/2776-595-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/2776-610-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 2 IoCs

pid	Process
4408	scan_241205-801_draft_PO.exe
4408	scan_241205-801_draft_PO.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-1-5-21-3350944739-639801879-157714471-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	scan_241205-801_draft_PO.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
5048	scan_241205-801_draft_PO.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4408	scan_241205-801_draft_PO.exe
5048	scan_241205-801_draft_PO.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4408 set thread context of 5048	4408	scan_241205-801_draft_PO.exe	97
PID 5048 set thread context of 2776	5048	scan_241205-801_draft_PO.exe	99
PID 5048 set thread context of 4516	5048	scan_241205-801_draft_PO.exe	100
PID 5048 set thread context of 4168	5048	scan_241205-801_draft_PO.exe	101

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\afholdshotellers\nineholes.Uni179	scan_241205-801_draft_PO.exe
File opened for modification	C:\Windows\resources\torvind\Microspecies102.gip	scan_241205-801_draft_PO.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	scan_241205-801_draft_PO.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	scan_241205-801_draft_PO.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	scan_241205-801_draft_PO.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	scan_241205-801_draft_PO.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	scan_241205-801_draft_PO.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2776	scan_241205-801_draft_PO.exe
2776	scan_241205-801_draft_PO.exe
4168	scan_241205-801_draft_PO.exe
4168	scan_241205-801_draft_PO.exe
2776	scan_241205-801_draft_PO.exe
2776	scan_241205-801_draft_PO.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
4408	scan_241205-801_draft_PO.exe
5048	scan_241205-801_draft_PO.exe
5048	scan_241205-801_draft_PO.exe
5048	scan_241205-801_draft_PO.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4168	scan_241205-801_draft_PO.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
5048	scan_241205-801_draft_PO.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4408 wrote to memory of 5048	4408	scan_241205-801_draft_PO.exe	97
PID 4408 wrote to memory of 5048	4408	scan_241205-801_draft_PO.exe	97
PID 4408 wrote to memory of 5048	4408	scan_241205-801_draft_PO.exe	97
PID 4408 wrote to memory of 5048	4408	scan_241205-801_draft_PO.exe	97
PID 4408 wrote to memory of 5048	4408	scan_241205-801_draft_PO.exe	97
PID 5048 wrote to memory of 2776	5048	scan_241205-801_draft_PO.exe	99
PID 5048 wrote to memory of 2776	5048	scan_241205-801_draft_PO.exe	99
PID 5048 wrote to memory of 2776	5048	scan_241205-801_draft_PO.exe	99
PID 5048 wrote to memory of 4516	5048	scan_241205-801_draft_PO.exe	100
PID 5048 wrote to memory of 4516	5048	scan_241205-801_draft_PO.exe	100
PID 5048 wrote to memory of 4516	5048	scan_241205-801_draft_PO.exe	100
PID 5048 wrote to memory of 4168	5048	scan_241205-801_draft_PO.exe	101
PID 5048 wrote to memory of 4168	5048	scan_241205-801_draft_PO.exe	101
PID 5048 wrote to memory of 4168	5048	scan_241205-801_draft_PO.exe	101

C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe
"C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4408
- C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe
  "C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.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 SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:5048
- - C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe
    C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe /stext "C:\Users\Admin\AppData\Local\Temp\yuvncwmexjsykc"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2776
- - C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe
    C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe /stext "C:\Users\Admin\AppData\Local\Temp\aojydgwylrkdmqsux"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:4516
- - C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe
    C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe /stext "C:\Users\Admin\AppData\Local\Temp\lqoqdyhayzcqxwoggrzcu"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4168

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\nsbB907.tmp\System.dll

Filesize
11KB

MD5
75ed96254fbf894e42058062b4b4f0d1

SHA1
996503f1383b49021eb3427bc28d13b5bbd11977

SHA256
a632d74332b3f08f834c732a103dafeb09a540823a2217ca7f49159755e8f1d7

SHA512
58174896db81d481947b8745dafe3a02c150f3938bb4543256e8cce1145154e016d481df9fe68dac6d48407c62cbe20753320ebd5fe5e84806d07ce78e0eb0c4

Download Submit
C:\Users\Admin\AppData\Local\Temp\nshB977.tmp

Filesize
4B

MD5
cde63b34c142af0a38cbe83791c964f8

SHA1
ece2b194b486118b40ad12c1f0e9425dd0672424

SHA256
65e2d70166c9a802b7ad2a87129b8945f083e5f268878790a9d1f1c03f47938d

SHA512
0559d3d34ad64ccc27e685431c24fc6ead0f645db14fa0e125a64fb67dbd158c15432c1fc5407811aac8a3486090dfbcfcbc3c6bf5aa0ec73f979ef62d14853c

Download Submit
C:\Users\Admin\AppData\Local\Temp\nshB977.tmp

Filesize
6B

MD5
50484c19f1afdaf3841a0d821ed393d2

SHA1
c65a0fb7e74ffd2c9fc3a0f9aacb0f6a24b0a68b

SHA256
6923dd1bc0460082c5d55a831908c24a282860b7f1cd6c2b79cf1bc8857c639c

SHA512
d51a20d67571fe70bcd6c36e1382a3c342f42671c710090b75fcfc2405ce24488e03a7131eefe4751d0bd3aeaad816605ad10c8e3258d72fcf379e32416cbf3b

Download Submit
C:\Users\Admin\AppData\Local\Temp\nshB977.tmp

Filesize
7B

MD5
67cfa7364c4cf265b047d87ff2e673ae

SHA1
56e27889277981a9b63fcf5b218744a125bbc2fa

SHA256
639b68bd180b47d542dd001d03557ee2d5b3065c3c783143bc9fb548f3fd7713

SHA512
17f28a136b20b89e9c3a418b08fd8e6fcaac960872dc33b2481af2d872efc44228f420759c57724f5d953c7ba98f2283e2acc7dfe5a58cbf719c6480ec7a648b

Download Submit
C:\Users\Admin\AppData\Local\Temp\nshB977.tmp

Filesize
8B

MD5
c3cb69218b85c3260387fb582cb518dd

SHA1
961c892ded09a4cbb5392097bb845ccba65902ad

SHA256
1c329924865741e0222d3ead23072cfbed14f96e2b0432573068eb0640513101

SHA512
2402fffeb89c531db742bf6f5466eee8fe13edf97b8ecfc2cace3522806b322924d1ca81dda25e59b4047b8f40ad11ae9216e0a0d5c7fc6beef4368eb9551422

Download Submit
C:\Users\Admin\AppData\Local\Temp\nshB977.tmp

Filesize
9B

MD5
2b3884fe02299c565e1c37ee7ef99293

SHA1
d8e2ef2a52083f6df210109fea53860ea227af9c

SHA256
ae789a65914ed002efb82dad89e5a4d4b9ec8e7faae30d0ed6e3c0d20f7d3858

SHA512
aeb9374a52d0ad99336bfd4ec7bb7c5437b827845b8784d9c21f7d96a931693604689f6adc3ca25fad132a0ad6123013211ff550f427fa86e4f26c122ac6a0fe

Download Submit
C:\Users\Admin\AppData\Local\Temp\nshB977.tmp

Filesize
10B

MD5
9a53fc1d7126c5e7c81bb5c15b15537b

SHA1
e2d13e0fa37de4c98f30c728210d6afafbb2b000

SHA256
a7de06c22e4e67908840ec3f00ab8fe9e04ae94fb16a74136002afbaf607ff92

SHA512
b0bffbb8072dbdcfc68f0e632f727c08fe3ef936b2ef332c08486553ff2cef7b0bcdb400e421a117e977bb0fac17ce4706a8097e32d558a918433646b6d5f1a1

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsrB918.tmp

Filesize
5B

MD5
e2fecc970546c3418917879fe354826c

SHA1
63f1c1dd01b87704a6b6c99fd9f141e0a3064f16

SHA256
ff91566d755f5d038ae698a2cc0a7d4d14e5273afafc37b6f03afda163768fa0

SHA512
3c4a68cbaee94f986515f43305a0e7620c14c30213d4a17db4a3e8a1b996764eb688bf733f472fc52073c2c80bb5229bb29411d7601aefe1c4370e230c341a0a

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsrBA04.tmp

Filesize
1B

MD5
8ce4b16b22b58894aa86c421e8759df3

SHA1
13fbd79c3d390e5d6585a21e11ff5ec1970cff0c

SHA256
8254c329a92850f6d539dd376f4816ee2764517da5e0235514af433164480d7a

SHA512
2af8a9104b3f64ed640d8c7e298d2d480f03a3610cbc2b33474321ec59024a48592ea8545e41e09d5d1108759df48ede0054f225df39d4f0f312450e0aa9dd25

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsrBA04.tmp

Filesize
2B

MD5
25bc6654798eb508fa0b6343212a74fe

SHA1
15d5e1d3b948fd5986aaff7d9419b5e52c75fc93

SHA256
8e5202705183bd3a20a29e224499b0f77a8273ee33cd93cca71043c57ad4bdfc

SHA512
5868c6241ed3cfcc5c34bfe42e4b9f5c69e74975e524771d8c9f35cafc13fd01cd943ec4d8caefee79a1f4a457e69d20b7a86f88db83a5bc3e6bd8a619972898

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsrBA04.tmp

Filesize
3B

MD5
4e27f2226785e9abbe046fc592668860

SHA1
28b18a7f383131df509f7191f946a32c5a2e410c

SHA256
01a219245e1501fee01ce0baea8f6065ce5162cea12fa570689a07c9717be81d

SHA512
2a23585835bdb5db8175cab265566042282841efdcee8aaba8b9b5d466b0f165c0c5973033ce94bb9a8f07a956689247981ea07ac5a51408263e1653d9710adb

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

Filesize
4KB

MD5
c3c5f2de99b7486f697634681e21bab0

SHA1
00f90d495c0b2b63fde6532e033fdd2ade25633d

SHA256
76296dc29f718988107d35d0e0b835c2bf3fc7405e79e5121aa4738f82b51582

SHA512
7c60ffdc093de30e793d20768877f2f586bee3e948767871f9a1139252d5d2f593ba6f88ce0ed5f72c79faddb26186792df0581e4b6c84d405c44d9d12f951b8

Download Submit
memory/2776-610-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2776-595-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2776-591-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2776-593-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4168-605-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4168-598-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4168-597-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4168-600-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4168-606-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4408-579-0x00000000745B4000-0x00000000745B5000-memory.dmp

Filesize
4KB

Download
memory/4408-577-0x00000000063C0000-0x0000000007AFF000-memory.dmp

Filesize
23.2MB

Download
memory/4408-578-0x0000000077961000-0x0000000077A81000-memory.dmp

Filesize
1.1MB

Download
memory/4408-580-0x00000000063C0000-0x0000000007AFF000-memory.dmp

Filesize
23.2MB

Download
memory/4516-596-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4516-594-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4516-592-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4516-603-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5048-590-0x0000000000850000-0x0000000001AA4000-memory.dmp

Filesize
18.3MB

Download
memory/5048-584-0x0000000001AB0000-0x00000000031EF000-memory.dmp

Filesize
23.2MB

Download
memory/5048-586-0x0000000000850000-0x0000000001AA4000-memory.dmp

Filesize
18.3MB

Download
memory/5048-583-0x0000000077A05000-0x0000000077A06000-memory.dmp

Filesize
4KB

Download
memory/5048-581-0x0000000001AB0000-0x00000000031EF000-memory.dmp

Filesize
23.2MB

Download
memory/5048-604-0x0000000077961000-0x0000000077A81000-memory.dmp

Filesize
1.1MB

Download
memory/5048-582-0x00000000779E8000-0x00000000779E9000-memory.dmp

Filesize
4KB

Download
memory/5048-613-0x00000000341E0000-0x00000000341F9000-memory.dmp

Filesize
100KB

Download
memory/5048-616-0x00000000341E0000-0x00000000341F9000-memory.dmp

Filesize
100KB

Download
memory/5048-617-0x00000000341E0000-0x00000000341F9000-memory.dmp

Filesize
100KB

Download