guloader | cd4d76cf155a0fd49a192b9ffe6ba360361bd469516215ffd1a54c4b0649fcdd

General

Target

?????? - ??????#9553-01.exe
Size

657KB
MD5

bdf0580d6cf3a59b15f5817437a6c5a5
SHA1

c3de15533c82e6a56975c3a5aa42ca88ec431cb2
SHA256

133891fc02269ee06eb3e6ab1f20391fe1486cd5620f766c85b8fceaf223dc84
SHA512

936570aa56de42c565b87730ca76f6e006a8278ad893a19286f61295da4656eeaaa88ae1d684af6bc961f8af9d7b74249e5ee7f4f3d78e68cb271b8860f967d0
SSDEEP

12288:5XJ5r639UgrDDIVWN+YP7924lgRgPetEsVtDZoeDl51SKd0714/A:r5r6//DIVWUYj925RgPetEsVcy51pd0x

Score

10^/10

guloader remcos remotehost collection discovery downloader rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

172.245.93.118:25000

172.245.93.118:26000

172.245.93.118:2484

172.245.93.118:2700

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-GFGCCE
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

Detected Nirsoft tools 8 IoCs

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

resource	yara_rule
behavioral1/memory/2036-50-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2644-44-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2036-53-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2036-52-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral1/memory/2672-51-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2672-49-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral1/memory/2644-59-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2672-62-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral1/memory/2672-51-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2672-49-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral1/memory/2672-62-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral1/memory/2644-44-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral1/memory/2644-59-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 2 IoCs

pid	Process
2376	______ - ______#9553-01.exe
2376	______ - ______#9553-01.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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	______ - ______#9553-01.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2060	______ - ______#9553-01.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2376	______ - ______#9553-01.exe
2060	______ - ______#9553-01.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 2376 set thread context of 2060	2376	______ - ______#9553-01.exe	30
PID 2060 set thread context of 2644	2060	______ - ______#9553-01.exe	33
PID 2060 set thread context of 2672	2060	______ - ______#9553-01.exe	34
PID 2060 set thread context of 2036	2060	______ - ______#9553-01.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	______ - ______#9553-01.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	______ - ______#9553-01.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	______ - ______#9553-01.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	______ - ______#9553-01.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	______ - ______#9553-01.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2644	______ - ______#9553-01.exe
2644	______ - ______#9553-01.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
2376	______ - ______#9553-01.exe
2060	______ - ______#9553-01.exe
2060	______ - ______#9553-01.exe
2060	______ - ______#9553-01.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2036	______ - ______#9553-01.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2376 wrote to memory of 2060	2376	______ - ______#9553-01.exe	30
PID 2376 wrote to memory of 2060	2376	______ - ______#9553-01.exe	30
PID 2376 wrote to memory of 2060	2376	______ - ______#9553-01.exe	30
PID 2376 wrote to memory of 2060	2376	______ - ______#9553-01.exe	30
PID 2376 wrote to memory of 2060	2376	______ - ______#9553-01.exe	30
PID 2376 wrote to memory of 2060	2376	______ - ______#9553-01.exe	30
PID 2060 wrote to memory of 2644	2060	______ - ______#9553-01.exe	33
PID 2060 wrote to memory of 2644	2060	______ - ______#9553-01.exe	33
PID 2060 wrote to memory of 2644	2060	______ - ______#9553-01.exe	33
PID 2060 wrote to memory of 2644	2060	______ - ______#9553-01.exe	33
PID 2060 wrote to memory of 2672	2060	______ - ______#9553-01.exe	34
PID 2060 wrote to memory of 2672	2060	______ - ______#9553-01.exe	34
PID 2060 wrote to memory of 2672	2060	______ - ______#9553-01.exe	34
PID 2060 wrote to memory of 2672	2060	______ - ______#9553-01.exe	34
PID 2060 wrote to memory of 2036	2060	______ - ______#9553-01.exe	35
PID 2060 wrote to memory of 2036	2060	______ - ______#9553-01.exe	35
PID 2060 wrote to memory of 2036	2060	______ - ______#9553-01.exe	35
PID 2060 wrote to memory of 2036	2060	______ - ______#9553-01.exe	35

C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe
"C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.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:2376
- C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe
  "C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.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 WriteProcessMemory
  PID:2060
- - C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe
    "C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe" /stext "C:\Users\Admin\AppData\Local\Temp\ngmie"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:2644
- - C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe
    "C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe" /stext "C:\Users\Admin\AppData\Local\Temp\yarafntl"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2672
- - C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe
    "C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe" /stext "C:\Users\Admin\AppData\Local\Temp\icwlggefdbwp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:2036

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:\Users\Admin\AppData\Local\Temp\ngmie

Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
\Users\Admin\AppData\Local\Temp\nsdAD9F.tmp\System.dll

Filesize
11KB

MD5
b853d5d2361ade731e33e882707efc34

SHA1
c58b1aeabdf1cbb8334ef8797e7aceaa7a1cb6be

SHA256
f0cd96e0b6e40f92ad1aa0efacde833bae807b92fca19bf062c1cf8acf29484b

SHA512
8ea31d82ffa6f58dab5632fe72690d3a6db0be65aec85fc8a1f71626773c0974dcebefae17bcf67c4c56ef442545e985eea0b348ff6e4fc36740640092b08d69

Download Submit
memory/2036-52-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2036-47-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2036-50-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2036-48-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2036-53-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2060-67-0x0000000031A40000-0x0000000031A59000-memory.dmp

Filesize
100KB

Download
memory/2060-34-0x0000000077590000-0x0000000077739000-memory.dmp

Filesize
1.7MB

Download
memory/2060-35-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2060-37-0x0000000000470000-0x00000000014D2000-memory.dmp

Filesize
16.4MB

Download
memory/2060-68-0x0000000031A40000-0x0000000031A59000-memory.dmp

Filesize
100KB

Download
memory/2060-64-0x0000000031A40000-0x0000000031A59000-memory.dmp

Filesize
100KB

Download
memory/2376-74-0x0000000003FD0000-0x0000000004A20000-memory.dmp

Filesize
10.3MB

Download
memory/2376-30-0x0000000003FD0000-0x0000000004A20000-memory.dmp

Filesize
10.3MB

Download
memory/2376-31-0x0000000077591000-0x0000000077692000-memory.dmp

Filesize
1.0MB

Download
memory/2376-32-0x0000000077590000-0x0000000077739000-memory.dmp

Filesize
1.7MB

Download
memory/2376-33-0x0000000003FD0000-0x0000000004A20000-memory.dmp

Filesize
10.3MB

Download
memory/2644-43-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2644-41-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2644-42-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2644-59-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2644-44-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2672-46-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2672-62-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2672-49-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2672-51-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2672-45-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download

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