guloader | a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6

General

Target

Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
Size

700KB
MD5

8897bad145bedfb5534dbe7d1dd93fb0
SHA1

fdaa956d0dde4a0d4c1a405e07bca11dc26467a6
SHA256

a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6
SHA512

6bfbdcb3ef738bbb377101526eb146e9948b598727275e99af4b200f98df0c8ddda9bd21c001e8503de06d6e4ee6f8a08e165a43b77429c6c56928eb7ab34f3c
SSDEEP

12288:wYFMrtB0UyWbuz1ZuvZuWRCwqA/RDzanhMqHkYxcj:wYytB0UyWbuyvEWRzZRDIhMV

Score

10^/10

guloader remcos remotehost collection discovery downloader rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

204.10.160.190:2404

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-GUFRHI
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
behavioral2/memory/464-44-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3528-43-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4600-55-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4600-56-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3528-48-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/464-47-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3528-46-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4600-58-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/464-61-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3528-43-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3528-48-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3528-46-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 3 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/464-44-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/464-47-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/464-61-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 1 IoCs

pid	Process
4784	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.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-1-5-21-1479699283-3000499823-2337359760-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4784	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2076 set thread context of 464	2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	89
PID 2076 set thread context of 3528	2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	90
PID 2076 set thread context of 4600	2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	91

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	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
464	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
464	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
4600	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
4600	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
464	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
464	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
4784	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4600	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 4784 wrote to memory of 2076	4784	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	86
PID 4784 wrote to memory of 2076	4784	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	86
PID 4784 wrote to memory of 2076	4784	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	86
PID 4784 wrote to memory of 2076	4784	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	86
PID 2076 wrote to memory of 464	2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	89
PID 2076 wrote to memory of 464	2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	89
PID 2076 wrote to memory of 464	2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	89
PID 2076 wrote to memory of 3528	2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	90
PID 2076 wrote to memory of 3528	2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	90
PID 2076 wrote to memory of 3528	2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	90
PID 2076 wrote to memory of 4600	2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	91
PID 2076 wrote to memory of 4600	2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	91
PID 2076 wrote to memory of 4600	2076	Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe	91

C:\Users\Admin\AppData\Local\Temp\Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
"C:\Users\Admin\AppData\Local\Temp\Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4784
- C:\Users\Admin\AppData\Local\Temp\Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
  "C:\Users\Admin\AppData\Local\Temp\Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.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:2076
- - C:\Users\Admin\AppData\Local\Temp\Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
    C:\Users\Admin\AppData\Local\Temp\Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe /stext "C:\Users\Admin\AppData\Local\Temp\vouihrnsrmjwduenjdnfnedu"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:464
- - C:\Users\Admin\AppData\Local\Temp\Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
    C:\Users\Admin\AppData\Local\Temp\Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe /stext "C:\Users\Admin\AppData\Local\Temp\gqhaijglfubjnatrsoigyjplmno"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:3528
- - C:\Users\Admin\AppData\Local\Temp\Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe
    C:\Users\Admin\AppData\Local\Temp\Sigmanly_a32a27ceefc724f43ae4b66df898b2f659df2e5b1c7ce819d9667846093814e6.exe /stext "C:\Users\Admin\AppData\Local\Temp\qknticqntctoqgpdjruibwkuvbyggu"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4600

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
5dd4bba88da322bc33e3ee3855ab64b9

SHA1
b01cfd7ed1457e1cc66b63e722a697263d422505

SHA256
388ecdb39ad29cf88a8cba67252ab2c1c3b72f04cdb1c2c75cdacb0525160ed6

SHA512
3190f4e37e47acadbf075cfadf141d9577900c7b6edd34cff46ac8f885fc56acb81385a373457d9f5d5eeaeb9591b71e6e182b7a47aaf0895c846196080f9b15

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsk91C0.tmp\System.dll

Filesize
12KB

MD5
cff85c549d536f651d4fb8387f1976f2

SHA1
d41ce3a5ff609df9cf5c7e207d3b59bf8a48530e

SHA256
8dc562cda7217a3a52db898243de3e2ed68b80e62ddcb8619545ed0b4e7f65a8

SHA512
531d6328daf3b86d85556016d299798fa06fefc81604185108a342d000e203094c8c12226a12bd6e1f89b0db501fb66f827b610d460b933bd4ab936ac2fd8a88

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

Filesize
4KB

MD5
c0cecaec3481fe98a323c11fac3d67a5

SHA1
95e945a0f6c6626065d9cd4446ad82921ccc6429

SHA256
b11b0b8b1edbe699deaafc1d7a400d85a00c4577559bbac0780dcb5806e5091e

SHA512
2fea21aabb049471ec2a47bb101332094604109bf0bbf9f866c493927c1e5b37b5622a8c5f4fa3a40c45eb1e39e3de2ceae522e9c45ef7e55999b2b475cd82ce

Download Submit
memory/464-61-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/464-41-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/464-47-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/464-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/464-38-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2076-34-0x00000000016E0000-0x0000000004A7B000-memory.dmp

Filesize
51.6MB

Download
memory/2076-75-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2076-30-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2076-28-0x0000000077E25000-0x0000000077E26000-memory.dmp

Filesize
4KB

Download
memory/2076-96-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2076-93-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2076-90-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2076-87-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2076-78-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2076-69-0x0000000035BA0000-0x0000000035BB9000-memory.dmp

Filesize
100KB

Download
memory/2076-27-0x0000000077E08000-0x0000000077E09000-memory.dmp

Filesize
4KB

Download
memory/2076-72-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2076-45-0x0000000077D81000-0x0000000077EA1000-memory.dmp

Filesize
1.1MB

Download
memory/2076-26-0x00000000016E0000-0x0000000004A7B000-memory.dmp

Filesize
51.6MB

Download
memory/2076-64-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/2076-33-0x0000000077D81000-0x0000000077EA1000-memory.dmp

Filesize
1.1MB

Download
memory/2076-65-0x0000000035BA0000-0x0000000035BB9000-memory.dmp

Filesize
100KB

Download
memory/2076-68-0x0000000035BA0000-0x0000000035BB9000-memory.dmp

Filesize
100KB

Download
memory/3528-39-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3528-42-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3528-46-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3528-48-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3528-43-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4600-58-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4600-50-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4600-51-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4600-56-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4600-55-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4784-25-0x0000000074BE5000-0x0000000074BE6000-memory.dmp

Filesize
4KB

Download
memory/4784-24-0x0000000077D81000-0x0000000077EA1000-memory.dmp

Filesize
1.1MB

Download
memory/4784-23-0x0000000077D81000-0x0000000077EA1000-memory.dmp

Filesize
1.1MB

Download

Analysis

Sharing