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 7 IoCs

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

resource	yara_rule
behavioral1/memory/2796-33-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/1780-34-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2656-29-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2656-28-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/1780-37-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2796-42-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2656-47-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2656-29-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2656-28-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2656-47-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2796-33-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2796-42-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 1 IoCs

pid	Process
2196	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-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2196	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2196 set thread context of 2812	2196	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	31
PID 2812 set thread context of 2796	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	33
PID 2812 set thread context of 2656	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	34
PID 2812 set thread context of 1780	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	35

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 2 IoCs

pid	Process
2796	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
2796	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2196	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1780	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2196 wrote to memory of 2812	2196	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	31
PID 2196 wrote to memory of 2812	2196	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	31
PID 2196 wrote to memory of 2812	2196	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	31
PID 2196 wrote to memory of 2812	2196	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	31
PID 2196 wrote to memory of 2812	2196	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	31
PID 2196 wrote to memory of 2812	2196	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	31
PID 2812 wrote to memory of 2796	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	33
PID 2812 wrote to memory of 2796	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	33
PID 2812 wrote to memory of 2796	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	33
PID 2812 wrote to memory of 2796	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	33
PID 2812 wrote to memory of 2656	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	34
PID 2812 wrote to memory of 2656	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	34
PID 2812 wrote to memory of 2656	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	34
PID 2812 wrote to memory of 2656	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	34
PID 2812 wrote to memory of 1780	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	35
PID 2812 wrote to memory of 1780	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	35
PID 2812 wrote to memory of 1780	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	35
PID 2812 wrote to memory of 1780	2812	2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe	35

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:2196
- 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:2812
- - C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
    C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe /stext "C:\Users\Admin\AppData\Local\Temp\zpwlfnhnykghqwbcemjzsmgsntpltbgckb"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2796
- - C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
    C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe /stext "C:\Users\Admin\AppData\Local\Temp\brbwff"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2656
- - C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe
    C:\Users\Admin\AppData\Local\Temp\2181299d4ea8b342a975ace1aed20c49c9ec86d46af6575f31ac1cfcbc240d68.exe /stext "C:\Users\Admin\AppData\Local\Temp\mlgogyljz"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1780

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
b8d301dc2e5dd95898643db403a25e3d

SHA1
3990dc07178402dc52486ab68479bd9e26f75f25

SHA256
d2863f226a8b5fb557ccef165daa1b64ac6ad8590b30c9188c1650d244c6465d

SHA512
3c0ff8ef7e23d57f1141aa24b0180cfe26ef121b896352ae79b1c38c912bf7d78fcf3d89db3d6e6790ae9a82a36617119bc729ee5e25302e0d885a0d1d6d4c2a

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

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
\Users\Admin\AppData\Local\Temp\nsdC90A.tmp\System.dll

Filesize
11KB

MD5
3f176d1ee13b0d7d6bd92e1c7a0b9bae

SHA1
fe582246792774c2c9dd15639ffa0aca90d6fd0b

SHA256
fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e

SHA512
0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

Download Submit
memory/1780-31-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1780-32-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1780-34-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1780-37-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2196-14-0x0000000002CC0000-0x00000000053ED000-memory.dmp

Filesize
39.2MB

Download
memory/2196-22-0x0000000002CC0000-0x00000000053ED000-memory.dmp

Filesize
39.2MB

Download
memory/2196-15-0x00000000775E0000-0x0000000077789000-memory.dmp

Filesize
1.7MB

Download
memory/2196-13-0x00000000775E1000-0x00000000776E2000-memory.dmp

Filesize
1.0MB

Download
memory/2196-12-0x0000000002CC0000-0x00000000053ED000-memory.dmp

Filesize
39.2MB

Download
memory/2656-47-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2656-25-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2656-26-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2656-28-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2656-29-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2796-27-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2796-33-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2796-24-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2796-42-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2812-16-0x00000000775E0000-0x0000000077789000-memory.dmp

Filesize
1.7MB

Download
memory/2812-62-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/2812-17-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/2812-49-0x00000000337A0000-0x00000000337B9000-memory.dmp

Filesize
100KB

Download
memory/2812-52-0x00000000337A0000-0x00000000337B9000-memory.dmp

Filesize
100KB

Download
memory/2812-53-0x00000000337A0000-0x00000000337B9000-memory.dmp

Filesize
100KB

Download
memory/2812-56-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/2812-18-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/2812-59-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/2812-46-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/2812-65-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/2812-68-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/2812-71-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/2812-74-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/2812-77-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/2812-80-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/2812-83-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download
memory/2812-86-0x0000000000460000-0x00000000014C2000-memory.dmp

Filesize
16.4MB

Download

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