guloader | d4d30acde6fa4db431b90817911b44d21c65fc1fa72744625bccafe3899869bc

General

Target
Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe
Size 116KB
Sample210809-b8n35eby3a
SHA256 d4d30acde6fa4db431b90817911b44d21c65fc1fa72744625bccafe3899869bc
MD5 9ce158db3a35f68975710ad534de747c
SHA1 3bd2c5f7af8bd0686844c7e933994a926980d7b1
SHA512 8b89fdab399a0ea02ecd4cbad69c570af4b16f826ecc0ca7c6bf81e48ec0651cd8694c9aa0526f1c1ea47f36fc9cecd2f990ae93378c9a2feca86963a2c51c5c
MD5 SHA1 SHA512

Score

10^/10

guloader modiloader remcos arsenal1 downloader evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

Version

3.2.0 Pro

Botnet

Arsenal1

C2

observatorioplanificacionselectaccount.services:64153

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
xlogs452.dat
keylog_flag
false
keylog_folder
Rumtime21
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-LE1HBX
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
notepad;solitaire;

Signatures

Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader
ModiLoader, DBatLoader
ModiLoader is a Delphi loader that misuses cloud services to download other malicious families.
trojan modiloader
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
UAC bypass 3 TTPs
evasion trojan

Bypass User Account Control
T1088

Disabling Security Tools
T1089

Modify Registry
T1112

Checks QEMU agent file 2 TTPs 2 IoCs

Checks presence of QEMU agent, possibly to detect virtualization.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe
File opened (read-only)	C:\Program Files\Qemu-ga\qemu-ga.exe	ieinstal.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run\amalienborgs = "C:\\Users\\Admin\\AppData\\Local\\Temp\\subsidire\\Chancy.exe"	ieinstal.exe
Key created	\REGISTRY\USER\S-1-5-21-3686645723-710336880-414668232-1000\Software\Microsoft\Windows\CurrentVersion\Run	ieinstal.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs

pid	Process
1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe
1056	ieinstal.exe
1056	ieinstal.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1868 set thread context of 1056	1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe	81

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
2208	reg.exe

Suspicious behavior: MapViewOfSection 3 IoCs

pid	Process
1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe
1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe
1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe
1056	ieinstal.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1868 wrote to memory of 3612	1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe	79
PID 1868 wrote to memory of 3612	1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe	79
PID 1868 wrote to memory of 3612	1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe	79
PID 1868 wrote to memory of 2496	1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe	80
PID 1868 wrote to memory of 2496	1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe	80
PID 1868 wrote to memory of 2496	1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe	80
PID 1868 wrote to memory of 1056	1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe	81
PID 1868 wrote to memory of 1056	1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe	81
PID 1868 wrote to memory of 1056	1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe	81
PID 1868 wrote to memory of 1056	1868	Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe	81
PID 1056 wrote to memory of 2772	1056	ieinstal.exe	82
PID 1056 wrote to memory of 2772	1056	ieinstal.exe	82
PID 1056 wrote to memory of 2772	1056	ieinstal.exe	82
PID 2772 wrote to memory of 2208	2772	cmd.exe	84
PID 2772 wrote to memory of 2208	2772	cmd.exe	84
PID 2772 wrote to memory of 2208	2772	cmd.exe	84

C:\Users\Admin\AppData\Local\Temp\Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe
"C:\Users\Admin\AppData\Local\Temp\Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe"
1⤵
- Checks QEMU agent file
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1868
- C:\Program Files (x86)\internet explorer\ieinstal.exe
  "C:\Users\Admin\AppData\Local\Temp\Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe"
  2⤵
  PID:3612
- C:\Program Files (x86)\internet explorer\ieinstal.exe
  "C:\Users\Admin\AppData\Local\Temp\Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe"
  2⤵
  PID:2496
- C:\Program Files (x86)\internet explorer\ieinstal.exe
  "C:\Users\Admin\AppData\Local\Temp\Extracto Serfinanza_0187651_85843_53171713968181210_627706_6896370833026759848_941162789707586143.exe"
  2⤵
  - Checks QEMU agent file
  - Adds Run key to start application
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1056
- - C:\Windows\SysWOW64\cmd.exe
    /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2772
  - - C:\Windows\SysWOW64\reg.exe
      C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      4⤵
      Modifies registry key
      PID:2208