guloader | 5997f5719c8272c35a0428f7cf2804f9eabb9e8260a9ed8f3e38807c8ba15a41

Analysis

max time kernel
150s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
17/05/2024, 12:12

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General

Target
5997f5719c8272c35a0428f7cf2804f9eabb9e8260a9ed8f3e38807c8ba15a41.exe
Size 384KB
Sample240517-pdhhdsgh44
SHA256 5997f5719c8272c35a0428f7cf2804f9eabb9e8260a9ed8f3e38807c8ba15a41
MD5 5d44e0aa3a2b58c2877f513d80d01e19
SHA1 578fd865531470f640aed391a3b21993237c424b
SHA512 37785964539860a328613c2d1b2454b7885fdc037a5ed95778afd66a822319a4fdf3d320142e75b1ee749a488a063f283d5a8683c54e56f0dd4c3b9356257d8b
SSDEEP 6144:DDv9rF8ANTnYjY+98jtTG1bSqOMYZHEeK20CSdLMDoCiSYDBSmE5WhDTXHwQ0w:/p7FkcsSqOREveA4ECKBSRydf
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

guloader remcos protected collection downloader execution persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Protected

jgbours284hawara02.duckdns.org:3050
jgbours284hawara02.duckdns.org:3051
jgbours284hawara03.duckdns.org:3050

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
true
install_flag
false
keylog_crypt
false
keylog_file
jiourhjs.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
klpcourg-793VPF
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
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

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/1980-60-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4968-61-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

resource	yara_rule
behavioral2/memory/1980-60-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4968-61-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4688-59-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3164	powershell.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	wab.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-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Bladselleriens168 = "%Dicyandiamide% -windowstyle minimized $Anillas=(Get-ItemProperty -Path 'HKCU:\\Sufflr50\\').Fanegas;%Dicyandiamide% ($Anillas)"	reg.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Cantraip\brkjerns.she	5997f5719c8272c35a0428f7cf2804f9eabb9e8260a9ed8f3e38807c8ba15a41.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

pid	Process
1636	wab.exe
1636	wab.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3164	powershell.exe
1636	wab.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 3164 set thread context of 1636	3164	powershell.exe	102
PID 1636 set thread context of 4968	1636	wab.exe	106
PID 1636 set thread context of 1980	1636	wab.exe	107
PID 1636 set thread context of 4688	1636	wab.exe	108

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
2540	reg.exe

Suspicious behavior: EnumeratesProcesses 16 IoCs

pid	Process
3164	powershell.exe
3164	powershell.exe
3164	powershell.exe
3164	powershell.exe
3164	powershell.exe
3164	powershell.exe
3164	powershell.exe
3164	powershell.exe
3164	powershell.exe
3164	powershell.exe
4688	wab.exe
4688	wab.exe
4968	wab.exe
4968	wab.exe
4968	wab.exe
4968	wab.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
3164	powershell.exe
1636	wab.exe
1636	wab.exe
1636	wab.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3164	powershell.exe
Token: SeDebugPrivilege	4688	wab.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1636	wab.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 3220 wrote to memory of 3164	3220	5997f5719c8272c35a0428f7cf2804f9eabb9e8260a9ed8f3e38807c8ba15a41.exe	90
PID 3220 wrote to memory of 3164	3220	5997f5719c8272c35a0428f7cf2804f9eabb9e8260a9ed8f3e38807c8ba15a41.exe	90
PID 3220 wrote to memory of 3164	3220	5997f5719c8272c35a0428f7cf2804f9eabb9e8260a9ed8f3e38807c8ba15a41.exe	90
PID 3164 wrote to memory of 2520	3164	powershell.exe	94
PID 3164 wrote to memory of 2520	3164	powershell.exe	94
PID 3164 wrote to memory of 2520	3164	powershell.exe	94
PID 3164 wrote to memory of 1636	3164	powershell.exe	102
PID 3164 wrote to memory of 1636	3164	powershell.exe	102
PID 3164 wrote to memory of 1636	3164	powershell.exe	102
PID 3164 wrote to memory of 1636	3164	powershell.exe	102
PID 3164 wrote to memory of 1636	3164	powershell.exe	102
PID 1636 wrote to memory of 2992	1636	wab.exe	103
PID 1636 wrote to memory of 2992	1636	wab.exe	103
PID 1636 wrote to memory of 2992	1636	wab.exe	103
PID 2992 wrote to memory of 2540	2992	cmd.exe	105
PID 2992 wrote to memory of 2540	2992	cmd.exe	105
PID 2992 wrote to memory of 2540	2992	cmd.exe	105
PID 1636 wrote to memory of 4968	1636	wab.exe	106
PID 1636 wrote to memory of 4968	1636	wab.exe	106
PID 1636 wrote to memory of 4968	1636	wab.exe	106
PID 1636 wrote to memory of 4968	1636	wab.exe	106
PID 1636 wrote to memory of 1980	1636	wab.exe	107
PID 1636 wrote to memory of 1980	1636	wab.exe	107
PID 1636 wrote to memory of 1980	1636	wab.exe	107
PID 1636 wrote to memory of 1980	1636	wab.exe	107
PID 1636 wrote to memory of 4688	1636	wab.exe	108
PID 1636 wrote to memory of 4688	1636	wab.exe	108
PID 1636 wrote to memory of 4688	1636	wab.exe	108
PID 1636 wrote to memory of 4688	1636	wab.exe	108

C:\Users\Admin\AppData\Local\Temp\5997f5719c8272c35a0428f7cf2804f9eabb9e8260a9ed8f3e38807c8ba15a41.exe
"C:\Users\Admin\AppData\Local\Temp\5997f5719c8272c35a0428f7cf2804f9eabb9e8260a9ed8f3e38807c8ba15a41.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:3220
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -windowstyle hidden "$Kernebiders=Get-Content 'C:\Users\Admin\AppData\Local\mesostoma\Vicomtesses\Rettelsens.Fun';$Henvisningsformaalenes=$Kernebiders.SubString(52381,3);.$Henvisningsformaalenes($Kernebiders)"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3164
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" "/c set /A 1^^0"
    3⤵
    PID:2520
- - C:\Program Files (x86)\windows mail\wab.exe
    "C:\Program Files (x86)\windows mail\wab.exe"
    3⤵
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious use of SetThreadContext
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1636
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Bladselleriens168" /t REG_EXPAND_SZ /d "%Dicyandiamide% -windowstyle minimized $Anillas=(Get-ItemProperty -Path 'HKCU:\Sufflr50\').Fanegas;%Dicyandiamide% ($Anillas)"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:2992
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Bladselleriens168" /t REG_EXPAND_SZ /d "%Dicyandiamide% -windowstyle minimized $Anillas=(Get-ItemProperty -Path 'HKCU:\Sufflr50\').Fanegas;%Dicyandiamide% ($Anillas)"
        5⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:2540
  - - C:\Program Files (x86)\windows mail\wab.exe
      "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\tuorsccaplsxellglchbwz"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4968
  - - C:\Program Files (x86)\windows mail\wab.exe
      "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\dotbtuntltkchzhkuetuhefkc"
      4⤵
      Accesses Microsoft Outlook accounts
      PID:1980
  - - C:\Program Files (x86)\windows mail\wab.exe
      "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\oryutnxvzbcprfvolpowkqrblpfqs"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:4688

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4104 --field-trial-handle=2280,i,11703952675008463361,17436195144517971517,262144 --variations-seed-version /prefetch:8
1⤵
PID:2296

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

__PSScriptPolicyTest_lkpn4srv.bdj.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lkpn4srv.bdj.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

tuorsccaplsxellglchbwz

Path C:\Users\Admin\AppData\Local\Temp\tuorsccaplsxellglchbwz
Size 4KB
SHA256 7176ca3d0196ec46f178107fdb587adaef3f6ea65daa80eccd2371a515880e04
MD5 10fa8ec140c204486092fb161e567ec7
SHA1 4d63e1f8df3afefedb19df73d7ee5f3b1e7b6473
SHA512 9db4eeb3f07d8d0579f75f3426c91156809152d8c1a37c9a27bf159888f6dd97f1212ac80f5bbb17e4d86f3087c512ccba2ca50a2db07d071370bd36364e1f76
SSDEEP 48:wvvv05xfvvc5xfdvv05xBvv05xakvv057:mvAxvYp1vAPvAbvA7
MD5 SHA1 SHA512 SSDEEP

Submit Download

Rettelsens.Fun

Path C:\Users\Admin\AppData\Local\mesostoma\Vicomtesses\Rettelsens.Fun
Size 51KB
SHA256 08c8481e9f4d40638f5754c9949884bc8ee962a5cc0dad71455f03043ad9ca1a
MD5 6b26f241773f6d93d74baa158720f000
SHA1 27544fb26ed0f29e578e75086f237053f33d447b
SHA512 f8d411c78094a180f9b5a4c0136df2c9f99d7fdf5dbc6842eb13bc96c062a93c7df666367deda8451a3c5e5a5eb17e33e6bd90b2482663a4acbebf38bd0ef19f
SSDEEP 1536:BSevPi5ZcRNUEBBfQOerucS4YOJcPOsGfTg:wIKsRNpDQOGfs
MD5 SHA1 SHA512 SSDEEP

Submit Download

Stoneite.Sub

Path C:\Users\Admin\AppData\Local\mesostoma\Vicomtesses\Stoneite.Sub
Size 331KB
SHA256 748d7d417c84a5655fd63d1563e01a9f65287c47e35a501516237497d123338d
MD5 487bff0f93689ca23ac0bc1884bbc5a5
SHA1 c032d16c921940bcff3f40e4c7f051d4a7d3af74
SHA512 708e5026a25e5043c3c05e51a86e76d85b79d9ea3c032520e2cb7714a8e4a3fd1684356dcd30a99d721146f9b06e94f76c7e45d5b8606a0e3b0e981f7a8cb368
SSDEEP 6144:0NFn9aiBx6ogjKCDDgCoPL2MlSdisLkjea9B9AReAmfiWAnRYETK/x4+B0:4ai7gbpoPaP8sYRvfiWAVK/xVB0
MD5 SHA1 SHA512 SSDEEP

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memory/1636-73-0x0000000024280000-0x0000000024299000-memory.dmp

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memory/1636-76-0x0000000024280000-0x0000000024299000-memory.dmp

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memory/1636-77-0x0000000024280000-0x0000000024299000-memory.dmp

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memory/1636-51-0x00000000018B0000-0x000000000776D000-memory.dmp

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memory/1636-50-0x0000000000650000-0x00000000018A4000-memory.dmp

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memory/1980-57-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/1980-60-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/1980-54-0x0000000000400000-0x0000000000462000-memory.dmp

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memory/3164-24-0x00000000066B0000-0x00000000066CE000-memory.dmp

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memory/3164-43-0x0000000073C60000-0x0000000074410000-memory.dmp

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memory/3164-28-0x0000000006BD0000-0x0000000006BEA000-memory.dmp

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memory/3164-29-0x0000000006C40000-0x0000000006C62000-memory.dmp

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memory/3164-30-0x0000000007F70000-0x0000000008514000-memory.dmp

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memory/3164-26-0x0000000073C60000-0x0000000074410000-memory.dmp

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memory/3164-32-0x0000000008BA0000-0x000000000921A000-memory.dmp

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memory/3164-34-0x0000000073C60000-0x0000000074410000-memory.dmp

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memory/3164-25-0x00000000066E0000-0x000000000672C000-memory.dmp

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memory/3164-36-0x0000000073C60000-0x0000000074410000-memory.dmp

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memory/3164-37-0x0000000073C6E000-0x0000000073C6F000-memory.dmp

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memory/3164-38-0x0000000073C60000-0x0000000074410000-memory.dmp

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memory/3164-40-0x0000000073C60000-0x0000000074410000-memory.dmp

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memory/3164-41-0x0000000073C60000-0x0000000074410000-memory.dmp

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memory/3164-42-0x0000000009220000-0x000000000F0DD000-memory.dmp

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memory/3164-27-0x0000000007920000-0x00000000079B6000-memory.dmp

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memory/3164-6-0x0000000073C6E000-0x0000000073C6F000-memory.dmp

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memory/3164-19-0x00000000060D0000-0x0000000006424000-memory.dmp

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memory/3164-7-0x0000000073C60000-0x0000000074410000-memory.dmp

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memory/3164-13-0x0000000006060000-0x00000000060C6000-memory.dmp

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memory/3164-8-0x00000000050C0000-0x00000000050F6000-memory.dmp

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memory/3164-9-0x0000000073C60000-0x0000000074410000-memory.dmp

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memory/3164-10-0x0000000005780000-0x0000000005DA8000-memory.dmp

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memory/3164-12-0x0000000005F80000-0x0000000005FE6000-memory.dmp

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memory/3164-11-0x0000000005EE0000-0x0000000005F02000-memory.dmp

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memory/4688-59-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/4688-58-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/4688-55-0x0000000000400000-0x0000000000424000-memory.dmp

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memory/4968-61-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/4968-56-0x0000000000400000-0x0000000000478000-memory.dmp

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memory/4968-53-0x0000000000400000-0x0000000000478000-memory.dmp

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