guloader | bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090

General

Target

bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
Size

811KB
MD5

97249feaaa2dd67af540e7615533294c
SHA1

dbfde83716b7253d7640d2ae3b45774337ce5931
SHA256

bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090
SHA512

c3dc5f9733e673f23d8d553e613a61fc9854a02f7f87a0305450cf34fb4f1c1be7ea011ac99fb1ee0a37a68a15ae6761948f2af9a5f03067cbf76a34568961a8
SSDEEP

12288:BTuHVrQ4WOKO7gN9GB5VG7K+M6HmPXMi+LO6Y1DLWqTylvQ9IFHepohIxFt7hxXO:twh/7Hy7K+zsXMTwAMWR9hoRR7jKzjrf

Score

10^/10

guloader remcos remotehost collection discovery downloader rat spyware stealer

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

102.165.14.28:26000

102.165.14.28:27000

102.165.14.28:28000

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-0V7E34
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

Detected Nirsoft tools 7 IoCs

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

resource	yara_rule
behavioral2/memory/2884-47-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/4516-59-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/4516-56-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/2884-51-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/2884-49-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft
behavioral2/memory/3672-46-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft
behavioral2/memory/3672-62-0x0000000000400000-0x0000000000478000-memory.dmp	Nirsoft

NirSoft MailPassView 3 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/2884-47-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/2884-51-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView
behavioral2/memory/2884-49-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/3672-46-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView
behavioral2/memory/3672-62-0x0000000000400000-0x0000000000478000-memory.dmp	WebBrowserPassView

Loads dropped DLL 2 IoCs

pid	Process
4292	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
4292	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe

Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs

pid	Process
4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4292	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe

Suspicious use of SetThreadContext 4 IoCs

description	pid	Process	procid_target
PID 4292 set thread context of 4724	4292	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	84
PID 4724 set thread context of 3672	4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	92
PID 4724 set thread context of 2884	4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	93
PID 4724 set thread context of 4516	4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	94

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\flagrancies.pre	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\bestillingsformularer\subareal.uri	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.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	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3672	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
3672	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
4516	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
4516	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
3672	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
3672	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
4292	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4516	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 4292 wrote to memory of 4724	4292	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	84
PID 4292 wrote to memory of 4724	4292	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	84
PID 4292 wrote to memory of 4724	4292	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	84
PID 4292 wrote to memory of 4724	4292	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	84
PID 4292 wrote to memory of 4724	4292	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	84
PID 4724 wrote to memory of 3672	4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	92
PID 4724 wrote to memory of 3672	4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	92
PID 4724 wrote to memory of 3672	4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	92
PID 4724 wrote to memory of 2884	4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	93
PID 4724 wrote to memory of 2884	4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	93
PID 4724 wrote to memory of 2884	4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	93
PID 4724 wrote to memory of 4516	4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	94
PID 4724 wrote to memory of 4516	4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	94
PID 4724 wrote to memory of 4516	4724	bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe	94

C:\Users\Admin\AppData\Local\Temp\bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
"C:\Users\Admin\AppData\Local\Temp\bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:4292
- C:\Users\Admin\AppData\Local\Temp\bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
  "C:\Users\Admin\AppData\Local\Temp\bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: MapViewOfSection
  - Suspicious use of WriteProcessMemory
  PID:4724
- - C:\Users\Admin\AppData\Local\Temp\bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
    C:\Users\Admin\AppData\Local\Temp\bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe /stext "C:\Users\Admin\AppData\Local\Temp\sczvdyebkatouzceidkibxhfcvyyftsze"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:3672
- - C:\Users\Admin\AppData\Local\Temp\bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
    C:\Users\Admin\AppData\Local\Temp\bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe /stext "C:\Users\Admin\AppData\Local\Temp\dwmfw"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:2884
- - C:\Users\Admin\AppData\Local\Temp\bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe
    C:\Users\Admin\AppData\Local\Temp\bd4499ee1845b2eeadc364b26f6e5891aaa699945a1125e6fcceedaac87f9090.exe /stext "C:\Users\Admin\AppData\Local\Temp\fyrywjzw"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4516

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nsp8686.tmp\System.dll

Filesize
11KB

MD5
9625d5b1754bc4ff29281d415d27a0fd

SHA1
80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

SHA256
c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

SHA512
dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

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

Filesize
4KB

MD5
a7e181f6aa185be0ab0ca68b30406fe6

SHA1
58c86162658dc609615b8b6400f85c92506dfdc8

SHA256
c3071dc55b94db225d9c0f2c1b21c7e8f27dbfd168b85b7d618d8d19950e7ff2

SHA512
49969eb10e0bf7925940eb7374451f811658ef9ccfb83b86fb337c4d06c3ba17eb0181f598d9e0ec9ca25bfaf644209ac47b73d62ac924e73d03a4dcf8f8dd0f

Download Submit
memory/2884-49-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2884-45-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2884-44-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2884-47-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/2884-51-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/3672-62-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3672-43-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3672-41-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/3672-46-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/4292-28-0x00000000775E1000-0x0000000077701000-memory.dmp

Filesize
1.1MB

Download
memory/4292-39-0x0000000004480000-0x0000000006A2F000-memory.dmp

Filesize
37.7MB

Download
memory/4292-27-0x0000000004480000-0x0000000006A2F000-memory.dmp

Filesize
37.7MB

Download
memory/4292-30-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/4292-29-0x0000000004480000-0x0000000006A2F000-memory.dmp

Filesize
37.7MB

Download
memory/4516-56-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4516-50-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4516-59-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4516-55-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/4724-31-0x0000000001A80000-0x000000000402F000-memory.dmp

Filesize
37.7MB

Download
memory/4724-65-0x0000000034D60000-0x0000000034D79000-memory.dmp

Filesize
100KB

Download
memory/4724-37-0x0000000001A80000-0x000000000402F000-memory.dmp

Filesize
37.7MB

Download
memory/4724-69-0x0000000034D60000-0x0000000034D79000-memory.dmp

Filesize
100KB

Download
memory/4724-38-0x0000000001A80000-0x000000000402F000-memory.dmp

Filesize
37.7MB

Download
memory/4724-68-0x0000000034D60000-0x0000000034D79000-memory.dmp

Filesize
100KB

Download
memory/4724-32-0x0000000000820000-0x0000000001A74000-memory.dmp

Filesize
18.3MB

Download

Analysis

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