guloader | 2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68

General

Target

2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
Size

519KB
MD5

cfd30b0bf833178f0d730ae3703b4c56
SHA1

de278f275878b570ce2a5efb69456555e888eaae
SHA256

2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68
SHA512

109deb972cf14b889687ffd58587a603fd9bd4b2a744bc4fb033552e8148a7232e8021db973432335a9ea1dcc2518effee11eb57ad85c3b34d2239fcc50461b9
SSDEEP

6144:sp8oOpVQtWBonIuwtkzixAn9EF99+wykDaxfnasuDjvdjplyTztn1xT4p+/l/JbX:po+VIWBonIuwQn9EF99+SDRfnqBr+KsW

Score

10^/10

guloader remcos remotehost collection credential_access discovery downloader rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

162.251.122.106:2404

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-A7EXAF
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
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Detected Nirsoft tools 6 IoCs

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

resource	yara_rule
behavioral2/memory/4932-29-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3092-30-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/1084-39-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/1084-40-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/3092-33-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4932-44-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/3092-30-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/3092-33-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4932-29-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4932-44-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 1 IoCs

pid	Process
1940	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Reads user/profile data of web browsers 2 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

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2412658365-3084825385-3340777666-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1940	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 1940 set thread context of 4976	1940	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	89
PID 4976 set thread context of 4932	4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	91
PID 4976 set thread context of 3092	4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	92
PID 4976 set thread context of 1084	4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.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	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4932	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
4932	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
1084	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
1084	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
4932	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
4932	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
1940	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1084	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1940 wrote to memory of 4976	1940	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	89
PID 1940 wrote to memory of 4976	1940	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	89
PID 1940 wrote to memory of 4976	1940	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	89
PID 1940 wrote to memory of 4976	1940	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	89
PID 1940 wrote to memory of 4976	1940	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	89
PID 4976 wrote to memory of 4932	4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	91
PID 4976 wrote to memory of 4932	4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	91
PID 4976 wrote to memory of 4932	4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	91
PID 4976 wrote to memory of 3092	4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	92
PID 4976 wrote to memory of 3092	4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	92
PID 4976 wrote to memory of 3092	4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	92
PID 4976 wrote to memory of 1084	4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	93
PID 4976 wrote to memory of 1084	4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	93
PID 4976 wrote to memory of 1084	4976	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	93

C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
"C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.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:1940
- C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
  "C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.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:4976
- - C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
    C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe /stext "C:\Users\Admin\AppData\Local\Temp\tpdseakqvehgfndqwevjrz"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:4932
- - C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
    C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe /stext "C:\Users\Admin\AppData\Local\Temp\vsilesvsjmzlpbzcfpqdcenobw"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:3092
- - C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
    C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe /stext "C:\Users\Admin\AppData\Local\Temp\gmnefkglxuryshngxacefqhfklihn"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1084

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

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
0c3e9e3df801888cddd8ff7ed96b0b71

SHA1
a7770282a6c52988cc357014ce1fc02f29989da2

SHA256
b62d85e2a07392b3dcf6130ac8d5fbfb3afacbb631591e7bb6f0c045b18ebfbb

SHA512
ba2ddc865c90a245840407eed7d1603c66acae52d881840642be6c6953617d67aca586c92dde1e6018a007a0db71cdf26a367a67d986b1297138598a5de505d5

Download Submit
C:\Users\Admin\AppData\Local\Temp\nso692B.tmp\System.dll

Filesize
11KB

MD5
3f176d1ee13b0d7d6bd92e1c7a0b9bae

SHA1
fe582246792774c2c9dd15639ffa0aca90d6fd0b

SHA256
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e

SHA512
0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

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

Filesize
4KB

MD5
c0ab2847671ed5375328c5127a02cc72

SHA1
dc2bcb51562fb17e5c8787833bc0181d88a5b75e

SHA256
e961f466a0638bc99182d0056245e2d8bf1ccc13a189b802aada981f379e2384

SHA512
0b8b634d21ac71e02cef86687bf84b6fcecfd24dafab8130f42ce8b4b3f308a2e1b1fa7bf8d37f2eda76efae2b30b8d39f41d808d771562d8545ed144241924f

Download Submit
memory/1084-35-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1084-34-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1084-40-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1084-39-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1940-14-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/1940-12-0x0000000002940000-0x000000000506D000-memory.dmp

Filesize
39.2MB

Download
memory/1940-13-0x0000000077311000-0x0000000077431000-memory.dmp

Filesize
1.1MB

Download
memory/1940-20-0x0000000002940000-0x000000000506D000-memory.dmp

Filesize
39.2MB

Download
memory/1940-11-0x0000000002940000-0x000000000506D000-memory.dmp

Filesize
39.2MB

Download
memory/3092-30-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3092-26-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3092-33-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3092-28-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4932-29-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4932-25-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4932-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4932-27-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4976-23-0x00000000016C0000-0x0000000003DED000-memory.dmp

Filesize
39.2MB

Download
memory/4976-21-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/4976-17-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/4976-47-0x0000000034F00000-0x0000000034F19000-memory.dmp

Filesize
100KB

Download
memory/4976-51-0x0000000034F00000-0x0000000034F19000-memory.dmp

Filesize
100KB

Download
memory/4976-50-0x0000000034F00000-0x0000000034F19000-memory.dmp

Filesize
100KB

Download
memory/4976-54-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/4976-57-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/4976-15-0x00000000016C0000-0x0000000003DED000-memory.dmp

Filesize
39.2MB

Download
memory/4976-60-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/4976-63-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/4976-66-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/4976-69-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/4976-72-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/4976-75-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/4976-78-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/4976-81-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/4976-84-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download
memory/4976-87-0x0000000000460000-0x00000000016B4000-memory.dmp

Filesize
18.3MB

Download

Analysis

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