guloader | cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac

Analysis

max time kernel
150s
max time network
143s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
12-02-2024 12:43

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General

Target

MDU9342434.exe
Size

1.1MB
MD5

2ac9cd56e3877efa00a0353cde71186f
SHA1

d0460a2b1fe30c342216048c4390af045b120146
SHA256

cbfc10741fb440a5c351bb62a9ffbe13d8fb90304925bee56ac6dd54a8e001ac
SHA512

e78d405d9b92319d396d488e4c104021a224789fabf09a278d252e1aa407cae1ce4d3562f1e6a18bc3151e16049a1a6d3687b6a4578fc4c946349d5292eb9e2d
SSDEEP

24576:oS5HuMJiUsl/f4g0lnQFpy54j3BjqgMQUWhypBj:B5o/falnQ+54j3ZftUNBj

Score

10^/10

guloader remcos top collection downloader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Top

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
mqerms.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
alpwovnb-G3F5OR
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

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

Processes:

resource	yara_rule
behavioral1/memory/2220-157-0x0000000000400000-0x0000000000457000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 1 IoCs

Password recovery tool for various web browsers

Processes:

resource	yara_rule
behavioral1/memory/332-150-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Nirsoft 3 IoCs

Processes:

resource	yara_rule
behavioral1/memory/332-150-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral1/memory/2220-157-0x0000000000400000-0x0000000000457000-memory.dmp	Nirsoft
behavioral1/memory/1500-161-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft

Loads dropped DLL 1 IoCs

Processes:

MDU9342434.exe

pid process

1796 MDU9342434.exe

pid	process
1796	MDU9342434.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

Processes:

wab.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-1603059206-2004189698-4139800220-1000\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

Processes:

wab.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1603059206-2004189698-4139800220-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\Gaucheries = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Kerykeion126\\Tranlampe231.exe"	wab.exe

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

Web Service
T1102

Processes:

flow ioc

4 drive.google.com
5 drive.google.com

flow	ioc
4	drive.google.com
5	drive.google.com

Drops file in System32 directory 2 IoCs

Processes:

MDU9342434.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\threshes.uds	MDU9342434.exe
File opened for modification	C:\Windows\SysWOW64\lohoch.gim	MDU9342434.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

Processes:

wab.exe

pid process

1728 wab.exe
1728 wab.exe
Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

Processes:

MDU9342434.exewab.exe

pid process

1796 MDU9342434.exe
1728 wab.exe

pid	process
1728	wab.exe
1728	wab.exe

pid	process
1796	MDU9342434.exe
1728	wab.exe

Suspicious use of SetThreadContext 4 IoCs

Processes:

MDU9342434.exewab.exe

description	pid	process	target process
PID 1796 set thread context of 1728	1796	MDU9342434.exe	wab.exe
PID 1728 set thread context of 332	1728	wab.exe	wab.exe
PID 1728 set thread context of 2220	1728	wab.exe	wab.exe
PID 1728 set thread context of 1500	1728	wab.exe	wab.exe

Drops file in Program Files directory 1 IoCs

Processes:

MDU9342434.exe

description ioc process

File opened for modification C:\Program Files (x86)\Common Files\forbandelsernes\kln.lio MDU9342434.exe

description	ioc	process
File opened for modification	C:\Program Files (x86)\Common Files\forbandelsernes\kln.lio	MDU9342434.exe

Drops file in Windows directory 3 IoCs

Processes:

MDU9342434.exe

description	ioc	process
File opened for modification	C:\Windows\Tnkepauses.tro	MDU9342434.exe
File opened for modification	C:\Windows\resources\0409\enchasing.Pet	MDU9342434.exe
File opened for modification	C:\Windows\Fonts\Forters67\Elektrotekniker.wra	MDU9342434.exe

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

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1200 1728 WerFault.exe wab.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

wab.exe

pid process

332 wab.exe
332 wab.exe
Suspicious behavior: MapViewOfSection 4 IoCs

Processes:

MDU9342434.exewab.exe

pid process

1796 MDU9342434.exe
1728 wab.exe
1728 wab.exe
1728 wab.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

wab.exe

description pid process

Token: SeDebugPrivilege 1500 wab.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

wab.exe

pid process

1728 wab.exe

pid	pid_target	process	target process
1200	1728	WerFault.exe	wab.exe

pid	process
332	wab.exe
332	wab.exe

pid	process
1796	MDU9342434.exe
1728	wab.exe
1728	wab.exe
1728	wab.exe

description	pid	process
Token: SeDebugPrivilege	1500	wab.exe

pid	process
1728	wab.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

MDU9342434.exewab.exe

description	pid	process	target process
PID 1796 wrote to memory of 1728	1796	MDU9342434.exe	wab.exe
PID 1796 wrote to memory of 1728	1796	MDU9342434.exe	wab.exe
PID 1796 wrote to memory of 1728	1796	MDU9342434.exe	wab.exe
PID 1796 wrote to memory of 1728	1796	MDU9342434.exe	wab.exe
PID 1796 wrote to memory of 1728	1796	MDU9342434.exe	wab.exe
PID 1796 wrote to memory of 1728	1796	MDU9342434.exe	wab.exe
PID 1728 wrote to memory of 332	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 332	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 332	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 332	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 332	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 2220	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 2220	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 2220	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 2220	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 2220	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 1500	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 1500	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 1500	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 1500	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 1500	1728	wab.exe	wab.exe
PID 1728 wrote to memory of 1200	1728	wab.exe	WerFault.exe
PID 1728 wrote to memory of 1200	1728	wab.exe	WerFault.exe
PID 1728 wrote to memory of 1200	1728	wab.exe	WerFault.exe
PID 1728 wrote to memory of 1200	1728	wab.exe	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\MDU9342434.exe
"C:\Users\Admin\AppData\Local\Temp\MDU9342434.exe"
1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1796

C:\Program Files (x86)\windows mail\wab.exe
"C:\Users\Admin\AppData\Local\Temp\MDU9342434.exe"
2⤵
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1728

C:\Program Files (x86)\windows mail\wab.exe
"C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\bafvedtofmkdbmoleod"
3⤵
- Suspicious behavior: EnumeratesProcesses
PID:332

C:\Program Files (x86)\windows mail\wab.exe
"C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\lvtnevdqtuchdskpoyqculv"
3⤵
- Accesses Microsoft Outlook accounts
PID:2220

C:\Program Files (x86)\windows mail\wab.exe
"C:\Program Files (x86)\windows mail\wab.exe" /stext "C:\Users\Admin\AppData\Local\Temp\oxygfookhcuuohybfjkvfypkob"
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:1500

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1728 -s 1424
3⤵
- Program crash
PID:1200

Network

MITRE ATT&CK Matrix ATT&CK v13

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

Exfiltration

Command and Control

Web Service

T1102

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\bafvedtofmkdbmoleod
Filesize
2B

MD5
f3b25701fe362ec84616a93a45ce9998

SHA1
d62636d8caec13f04e28442a0a6fa1afeb024bbb

SHA256
b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

SHA512
98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

Download Submit
\Users\Admin\AppData\Local\Temp\nso4201.tmp\System.dll
Filesize
11KB

MD5
17ed1c86bd67e78ade4712be48a7d2bd

SHA1
1cc9fe86d6d6030b4dae45ecddce5907991c01a0

SHA256
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

SHA512
0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

Download Submit
memory/332-150-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/332-147-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/332-143-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/332-140-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1500-161-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1500-160-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1500-156-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/1728-90-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-97-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-57-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-59-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-60-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-61-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-62-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-63-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-64-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-65-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-66-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-67-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-68-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-71-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-72-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-74-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-75-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-76-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-77-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-79-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-80-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-81-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-82-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-83-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-84-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-86-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-87-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-88-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-89-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-55-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-91-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-92-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-93-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-95-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-96-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-56-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-98-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-99-0x00000000778C0000-0x0000000077996000-memory.dmp

Filesize
856KB

Download
memory/1728-100-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-101-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-102-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-103-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-104-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-105-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-106-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-107-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-108-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-109-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-110-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-111-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-113-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-114-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-115-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-54-0x00000000020B0000-0x00000000048FD000-memory.dmp

Filesize
40.3MB

Download
memory/1728-53-0x00000000778C0000-0x0000000077996000-memory.dmp

Filesize
856KB

Download
memory/1728-52-0x0000000001040000-0x00000000020A2000-memory.dmp

Filesize
16.4MB

Download
memory/1728-30-0x00000000020B0000-0x00000000048FD000-memory.dmp

Filesize
40.3MB

Download
memory/1728-184-0x0000000000A30000-0x0000000000A49000-memory.dmp

Filesize
100KB

Download
memory/1728-25-0x00000000020B0000-0x00000000048FD000-memory.dmp

Filesize
40.3MB

Download
memory/1728-26-0x00000000776D0000-0x0000000077879000-memory.dmp

Filesize
1.7MB

Download
memory/1728-27-0x00000000778F6000-0x00000000778F7000-memory.dmp

Filesize
4KB

Download
memory/1728-28-0x00000000778C0000-0x0000000077996000-memory.dmp

Filesize
856KB

Download
memory/1796-24-0x0000000010000000-0x0000000010006000-memory.dmp

Filesize
24KB

Download
memory/1796-23-0x00000000778C0000-0x0000000077996000-memory.dmp

Filesize
856KB

Download
memory/1796-22-0x0000000003A00000-0x000000000624D000-memory.dmp

Filesize
40.3MB

Download
memory/1796-21-0x00000000776D0000-0x0000000077879000-memory.dmp

Filesize
1.7MB

Download
memory/1796-20-0x0000000003A00000-0x000000000624D000-memory.dmp

Filesize
40.3MB

Download
memory/2220-149-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/2220-157-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download
memory/2220-153-0x0000000000400000-0x0000000000457000-memory.dmp

Filesize
348KB

Download