guloader | 2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3

General

Target

2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe
Size

632KB
MD5

84e09bf944042fbd418724cddb729516
SHA1

8d908f01be478390e49bfe51fbca4959af157e1f
SHA256

2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3
SHA512

803912c31ef4e413d7b251fc400950aca18ae522ac5a0b87d51a459182b112edbcad78b506a8cbe7c12eb18b5a4c2825b139107edb7bd2dda6bd18fe43421e78
SSDEEP

12288:UElGNmPCeBgjfiWxnlApvOvcrG7fhbL7TWxv69jIQS6lpOYCUjJ+i:5lGUPBBDulAxOErGLN7avBQTlpvCU3

Score

10^/10

guloader remcos rem_doc2 discovery downloader execution persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Rem_doc2

C2

107.173.4.16:2404

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-DSGECX
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

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2748	powershell.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-457978338-2990298471-2379561640-1000\Software\Microsoft\Windows\CurrentVersion\Run\Markedsandel = "%Rykningspaategningens% -windowstyle minimized $Unbaked=(Get-ItemProperty -Path 'HKCU:\\kompositioner\\').Batikker;%Rykningspaategningens% ($Unbaked)"	reg.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
2748	powershell.exe
1168	wabmig.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2748 set thread context of 1168	2748	powershell.exe	32

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\Noumenalize\solipsists.cru	2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\Fonts\Urim.ini	2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe

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	wabmig.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
2524	reg.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2748	powershell.exe
2748	powershell.exe
2748	powershell.exe
2748	powershell.exe
2748	powershell.exe
2748	powershell.exe
2748	powershell.exe
2748	powershell.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2748	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2748	powershell.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2052 wrote to memory of 2748	2052	2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe	29
PID 2052 wrote to memory of 2748	2052	2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe	29
PID 2052 wrote to memory of 2748	2052	2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe	29
PID 2052 wrote to memory of 2748	2052	2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe	29
PID 2748 wrote to memory of 1168	2748	powershell.exe	32
PID 2748 wrote to memory of 1168	2748	powershell.exe	32
PID 2748 wrote to memory of 1168	2748	powershell.exe	32
PID 2748 wrote to memory of 1168	2748	powershell.exe	32
PID 2748 wrote to memory of 1168	2748	powershell.exe	32
PID 2748 wrote to memory of 1168	2748	powershell.exe	32
PID 1168 wrote to memory of 3012	1168	wabmig.exe	33
PID 1168 wrote to memory of 3012	1168	wabmig.exe	33
PID 1168 wrote to memory of 3012	1168	wabmig.exe	33
PID 1168 wrote to memory of 3012	1168	wabmig.exe	33
PID 3012 wrote to memory of 2524	3012	cmd.exe	35
PID 3012 wrote to memory of 2524	3012	cmd.exe	35
PID 3012 wrote to memory of 2524	3012	cmd.exe	35
PID 3012 wrote to memory of 2524	3012	cmd.exe	35

C:\Users\Admin\AppData\Local\Temp\2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe
"C:\Users\Admin\AppData\Local\Temp\2263f87e66243b4f0d6b1bb79e0638c6556b5d89a2506ad9db5c30cc02bbdcc3.exe"
1⤵
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2052
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -windowstyle hidden "$Semiexpositive=Get-Content 'C:\Users\Admin\AppData\Roaming\euthanasic\satineredes\Gammastraales\Skeletonlike.pas';$Folkedyb=$Semiexpositive.SubString(54300,3);.$Folkedyb($Semiexpositive)"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2748
- - C:\Program Files (x86)\windows mail\wabmig.exe
    "C:\Program Files (x86)\windows mail\wabmig.exe"
    3⤵
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:1168
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Markedsandel" /t REG_EXPAND_SZ /d "%Rykningspaategningens% -windowstyle minimized $Unbaked=(Get-ItemProperty -Path 'HKCU:\kompositioner\').Batikker;%Rykningspaategningens% ($Unbaked)"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:3012
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Markedsandel" /t REG_EXPAND_SZ /d "%Rykningspaategningens% -windowstyle minimized $Unbaked=(Get-ItemProperty -Path 'HKCU:\kompositioner\').Batikker;%Rykningspaategningens% ($Unbaked)"
        5⤵
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:2524

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

2

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\euthanasic\satineredes\Gammastraales\Skeletonlike.pas

Filesize
53KB

MD5
255119688c7065754a83c8ab994df0e0

SHA1
60d2f2b79e0ff83f5a44edec89b296f989eff2bb

SHA256
8289effe39fd7a273415735aaf3dda665c94473b7c8b698a088886ac52b4ec72

SHA512
0d956e851a7ddc97906b79d82c412cf1d49d7954244bf0d2a780857c1e15be0533862d9b88ce77c9f9dab289d6bb1eb5528ff53dc780110fc788dc2eff4e5f04

Download Submit
C:\Users\Admin\AppData\Roaming\euthanasic\satineredes\Gammastraales\Skillemnters.Bel

Filesize
339KB

MD5
6786d85d171f0a5872e24f5ae5d403a1

SHA1
8dd2a7e274f4ab1b278350f373abeb6ac540db6b

SHA256
7dd49bad8787a69b6afc1ac6db875cb9c0da93990d6251f45b4ff6e88fdebb6f

SHA512
02c69c706292c0e098e09e8c9b975fc746145b3edc0330bfc0656512b250016aac0deb49501416dab6cd0b79e927cd36fd0699a48ab90f67221097f7c38e86e1

Download Submit
memory/1168-46-0x0000000000D60000-0x0000000001DC2000-memory.dmp

Filesize
16.4MB

Download
memory/1168-43-0x0000000000D60000-0x0000000001DC2000-memory.dmp

Filesize
16.4MB

Download
memory/1168-26-0x0000000000D60000-0x0000000001DC2000-memory.dmp

Filesize
16.4MB

Download
memory/1168-25-0x0000000001DD0000-0x0000000005761000-memory.dmp

Filesize
57.6MB

Download
memory/2748-17-0x0000000073E90000-0x000000007443B000-memory.dmp

Filesize
5.7MB

Download
memory/2748-16-0x0000000073E90000-0x000000007443B000-memory.dmp

Filesize
5.7MB

Download
memory/2748-8-0x0000000073E91000-0x0000000073E92000-memory.dmp

Filesize
4KB

Download
memory/2748-18-0x0000000073E90000-0x000000007443B000-memory.dmp

Filesize
5.7MB

Download
memory/2748-19-0x0000000073E90000-0x000000007443B000-memory.dmp

Filesize
5.7MB

Download
memory/2748-15-0x0000000073E90000-0x000000007443B000-memory.dmp

Filesize
5.7MB

Download
memory/2748-21-0x0000000073E90000-0x000000007443B000-memory.dmp

Filesize
5.7MB

Download
memory/2748-22-0x0000000073E90000-0x000000007443B000-memory.dmp

Filesize
5.7MB

Download
memory/2748-24-0x0000000006220000-0x0000000009BB1000-memory.dmp

Filesize
57.6MB

Download
memory/2748-12-0x0000000073E90000-0x000000007443B000-memory.dmp

Filesize
5.7MB

Download
memory/2748-11-0x0000000073E90000-0x000000007443B000-memory.dmp

Filesize
5.7MB

Download
memory/2748-10-0x0000000073E90000-0x000000007443B000-memory.dmp

Filesize
5.7MB

Download
memory/2748-9-0x0000000073E90000-0x000000007443B000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads