guloader | 359ab600c1c1cb25744c5fd24b563ed2fbcd4918061e6409929db2c8e16a070c

General

Target

SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe
Size

724KB
MD5

a479acd2da79c2dfeabc05b5d6194fba
SHA1

18e8097c57cf691e5c2719ade7d2bca4573d9d23
SHA256

359ab600c1c1cb25744c5fd24b563ed2fbcd4918061e6409929db2c8e16a070c
SHA512

0a2d4564e0cd54394332bba59a9fbeb24afff121c420d51e5613bd3af333418ed4ef0b2b7bfcddd992857b8ec4cad773142028cbb48eaeeb8c0e433082070023
SSDEEP

12288:LR3BUI4bnFjfy75TC+WfSCgoSdYza46l0xFXc3gIwEH:V3GI4jFe7EJKT1nl0Pg73H

Score

10^/10

guloader remcos new-host collection discovery downloader rat

Malware Config

Extracted

Family

remcos

Botnet

New-Host

C2

176.65.142.81:9090

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-C2AG7V
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 4 IoCs

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

resource	yara_rule
behavioral2/memory/5796-39-0x0000000000400000-0x000000000047D000-memory.dmp	Nirsoft
behavioral2/memory/2928-44-0x0000000000400000-0x0000000000424000-memory.dmp	Nirsoft
behavioral2/memory/5796-40-0x0000000000400000-0x000000000047D000-memory.dmp	Nirsoft
behavioral2/memory/5716-49-0x0000000000400000-0x0000000000462000-memory.dmp	Nirsoft

NirSoft MailPassView 1 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/5716-49-0x0000000000400000-0x0000000000462000-memory.dmp	MailPassView

NirSoft WebBrowserPassView 2 IoCs

Password recovery tool for various web browsers

resource	yara_rule
behavioral2/memory/5796-39-0x0000000000400000-0x000000000047D000-memory.dmp	WebBrowserPassView
behavioral2/memory/5796-40-0x0000000000400000-0x000000000047D000-memory.dmp	WebBrowserPassView

Loads dropped DLL 2 IoCs

pid	Process
3208	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe
3208	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3342763580-2723508992-2885672917-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	recover.exe

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

Web Service

T1102

flow	ioc
26	drive.google.com
27	drive.google.com

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
3208	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe
4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 4984 set thread context of 5796	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	100
PID 4984 set thread context of 5716	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	101
PID 4984 set thread context of 2928	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	102

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\crepe\satanerne.ini	SecuriteInfo.com.Trojan.Win32.Makoob.9650.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	recover.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	recover.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	recover.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
5796	recover.exe
5796	recover.exe
2928	recover.exe
2928	recover.exe
5796	recover.exe
5796	recover.exe

Suspicious behavior: MapViewOfSection 4 IoCs

pid	Process
3208	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe
4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe
4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe
4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2928	recover.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 3208 wrote to memory of 4984	3208	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	95
PID 3208 wrote to memory of 4984	3208	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	95
PID 3208 wrote to memory of 4984	3208	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	95
PID 3208 wrote to memory of 4984	3208	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	95
PID 4984 wrote to memory of 5796	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	100
PID 4984 wrote to memory of 5796	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	100
PID 4984 wrote to memory of 5796	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	100
PID 4984 wrote to memory of 5796	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	100
PID 4984 wrote to memory of 5716	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	101
PID 4984 wrote to memory of 5716	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	101
PID 4984 wrote to memory of 5716	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	101
PID 4984 wrote to memory of 5716	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	101
PID 4984 wrote to memory of 2928	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	102
PID 4984 wrote to memory of 2928	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	102
PID 4984 wrote to memory of 2928	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	102
PID 4984 wrote to memory of 2928	4984	SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe	102

C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe
"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:3208
- C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.Win32.Makoob.9650.exe
  "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Trojan.Win32.Makoob.9650.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 FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4984
- - C:\Windows\SysWOW64\recover.exe
    C:\Windows\SysWOW64\recover.exe /stext "C:\Users\Admin\AppData\Local\Temp\vtgznjlvmezvmfvshltmvzfi"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    PID:5796
- - C:\Windows\SysWOW64\recover.exe
    C:\Windows\SysWOW64\recover.exe /stext "C:\Users\Admin\AppData\Local\Temp\gnusobwpimriomreywfgyeazfbqb"
    3⤵
    - Accesses Microsoft Outlook accounts
    - System Location Discovery: System Language Discovery
    PID:5716
- - C:\Windows\SysWOW64\recover.exe
    C:\Windows\SysWOW64\recover.exe /stext "C:\Users\Admin\AppData\Local\Temp\qpzkpthqwvjnzafiihahjrmifizkrzo"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2928

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Web Service

1

T1102

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nso69C7.tmp\System.dll

Filesize
11KB

MD5
a436db0c473a087eb61ff5c53c34ba27

SHA1
65ea67e424e75f5065132b539c8b2eda88aa0506

SHA256
75ed40311875312617d6711baed0be29fcaee71031ca27a8d308a72b15a51e49

SHA512
908f46a855480af6eacb2fb64de0e60b1e04bbb10b23992e2cf38a4cbebdcd7d3928c4c022d7ad9f7479265a8f426b93eef580afec95570e654c360d62f5e08d

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

Filesize
4KB

MD5
183a484857c42abff35dc9debdbee6dd

SHA1
7abea0ad337f4bfe11f70ed6ec55e8d19918bed7

SHA256
57366816fad3797dd06c762ebe5b569f13e518f1b95d200395ced430d46a3507

SHA512
9f4b1d43338e7dc29de5bbc97b5f83475e69bdcda035493a2f10ce49b93ba51c082774799eed4840a28264023d0918fd496763a4c7bf153d97bb6ed524f97406

Download Submit
memory/2928-44-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2928-42-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/2928-43-0x0000000000400000-0x0000000000424000-memory.dmp

Filesize
144KB

Download
memory/3208-18-0x0000000004DF0000-0x0000000007F71000-memory.dmp

Filesize
49.5MB

Download
memory/3208-19-0x0000000077671000-0x0000000077791000-memory.dmp

Filesize
1.1MB

Download
memory/3208-20-0x0000000010004000-0x0000000010005000-memory.dmp

Filesize
4KB

Download
memory/3208-22-0x0000000004DF0000-0x0000000007F71000-memory.dmp

Filesize
49.5MB

Download
memory/4984-58-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/4984-59-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/4984-69-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/4984-68-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/4984-37-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/4984-65-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/4984-64-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/4984-36-0x00000000016E0000-0x0000000004861000-memory.dmp

Filesize
49.5MB

Download
memory/4984-56-0x0000000035B60000-0x0000000035B79000-memory.dmp

Filesize
100KB

Download
memory/4984-55-0x0000000035B60000-0x0000000035B79000-memory.dmp

Filesize
100KB

Download
memory/4984-52-0x0000000035B60000-0x0000000035B79000-memory.dmp

Filesize
100KB

Download
memory/4984-57-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/4984-32-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/4984-63-0x0000000000480000-0x00000000016D4000-memory.dmp

Filesize
18.3MB

Download
memory/5716-41-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5716-49-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5716-45-0x0000000000400000-0x0000000000462000-memory.dmp

Filesize
392KB

Download
memory/5796-40-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/5796-39-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download

Analysis

Sharing