remcos | 4f660ee7d657778dc8c78514b1fa51f42decdfc61e1d609e6a7286ba2c20c70a

Analysis

max time kernel
150s
max time network
149s
platform
windows7_x64
resource
win7-20220718-en
resource tags

arch:x64arch:x86image:win7-20220718-enlocale:en-usos:windows7-x64system
submitted
28-07-2022 14:19

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General

Target

335b1296fa572b01158f7e8ef89c7064.exe
Size

479KB
MD5

335b1296fa572b01158f7e8ef89c7064
SHA1

4d41f80a6f2082acee991b6fdd830a3ae770ee6f
SHA256

4f660ee7d657778dc8c78514b1fa51f42decdfc61e1d609e6a7286ba2c20c70a
SHA512

a56e720d4ebcd2eab1949a796e6d46a355b6e507cda04f94d118543c95291b13802e24b118f7fe8dff26bc300fb5f7546ee73f9b7f1996453375b585a07b823e

Score

10^/10

remcos windows aspackv2 persistence rat

Malware Config

Extracted

Family

remcos

Botnet

windows

newstub01.duckdns.org:1888

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
systemdll.exe
copy_folder
system
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
system
keylog_path
%AppData%
mouse_option
false
mutex
mutex-LK2O9P
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
windows
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
wikipedia;solitaire;

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

ASPack v2.12-2.42 4 IoCs

Detects executables packed with ASPack v2.12-2.42

aspackv2

Processes:

resource	yara_rule
\Users\Admin\AppData\Local\Temp\MgQfxx.exe	aspack_v212_v242
\Users\Admin\AppData\Local\Temp\MgQfxx.exe	aspack_v212_v242
C:\Users\Admin\AppData\Local\Temp\MgQfxx.exe	aspack_v212_v242
C:\Users\Admin\AppData\Local\Temp\MgQfxx.exe	aspack_v212_v242

Executes dropped EXE 2 IoCs

Processes:

MgQfxx.exesystemdll.exe

pid process

2020 MgQfxx.exe
1836 systemdll.exe
Loads dropped DLL 4 IoCs

Processes:

335b1296fa572b01158f7e8ef89c7064.execmd.exe

pid process

1208 335b1296fa572b01158f7e8ef89c7064.exe
1208 335b1296fa572b01158f7e8ef89c7064.exe
268 cmd.exe
268 cmd.exe

pid	process
2020	MgQfxx.exe
1836	systemdll.exe

pid	process
1208	335b1296fa572b01158f7e8ef89c7064.exe
1208	335b1296fa572b01158f7e8ef89c7064.exe
268	cmd.exe
268	cmd.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

335b1296fa572b01158f7e8ef89c7064.exesystemdll.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\Run\	335b1296fa572b01158f7e8ef89c7064.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\Run\windows = "\"C:\\Users\\Admin\\AppData\\Roaming\\system\\systemdll.exe\""	335b1296fa572b01158f7e8ef89c7064.exe
Key created	\REGISTRY\USER\S-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\Run\	systemdll.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4084403625-2215941253-1760665084-1000\Software\Microsoft\Windows\CurrentVersion\Run\windows = "\"C:\\Users\\Admin\\AppData\\Roaming\\system\\systemdll.exe\""	systemdll.exe

Drops file in Program Files directory 64 IoCs

Processes:

MgQfxx.exe

description	ioc	process
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jcmd.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\klist.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\bin\kinit.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jre7\bin\ktab.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\POWERPNT.EXE	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\lib\visualvm\platform\lib\nbexec.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Windows Sidebar\sidebar.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jar.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\schemagen.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jre7\bin\orbd.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Reader 9.0\Reader\reader_sl.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\keytool.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Microsoft Games\Purble Place\PurblePlace.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\WORDICON.EXE	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Windows Mail\wabmig.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jvisualvm.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\wsgen.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\bin\javaw.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Microsoft Office\Office14\MSOHTMED.EXE	MgQfxx.exe
File opened for modification	C:\Program Files\Mozilla Firefox\updater.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32Info.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\IEContentService.exe	MgQfxx.exe
File opened for modification	C:\Program Files\7-Zip\7zG.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\89.0.4389.114\chrome_pwa_launcher.exe	MgQfxx.exe
File opened for modification	C:\Program Files\DVD Maker\DVDMaker.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\extcheck.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\pack200.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\bin\javaws.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\misc.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\ONENOTE.EXE	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Windows Photo Viewer\ImagingDevices.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Google\Chrome\Application\89.0.4389.114\Installer\chrmstp.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\java.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\servertool.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\bin\java-rmi.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jre7\bin\rmid.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Google\Update\1.3.36.71\GoogleUpdateCore.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jmap.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jsadebugd.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\MSQRY32.EXE	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jarsigner.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jre7\bin\pack200.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jre7\bin\unpack200.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Microsoft Games\SpiderSolitaire\SpiderSolitaire.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jre7\bin\javaw.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jre7\bin\tnameserv.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Mozilla Firefox\crashreporter.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\ACCICONS.EXE	MgQfxx.exe
File opened for modification	C:\Program Files\7-Zip\Uninstall.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\bin\jdb.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\bin\jabswitch.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jdk1.7.0_80\jre\bin\ssvagent.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Java\jre7\bin\java.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Microsoft Games\Chess\Chess.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\excelcnv.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Mozilla Maintenance Service\maintenanceservice.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Windows Sidebar\sidebar.exe	MgQfxx.exe
File opened for modification	C:\Program Files\7-Zip\7zFM.exe	MgQfxx.exe
File opened for modification	C:\Program Files\Mozilla Firefox\plugin-container.exe	MgQfxx.exe
File opened for modification	C:\Program Files\VideoLAN\VLC\vlc.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroTextExtractor.exe	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Microsoft Office\Office14\1033\ONELEV.EXE	MgQfxx.exe
File opened for modification	C:\Program Files (x86)\Mozilla Maintenance Service\Uninstall.exe	MgQfxx.exe

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

System Information Discovery
T1082
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

systemdll.exe

pid process

1836 systemdll.exe

pid	process
1836	systemdll.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

335b1296fa572b01158f7e8ef89c7064.exeWScript.execmd.exeMgQfxx.exe

description	pid	process	target process
PID 1208 wrote to memory of 2020	1208	335b1296fa572b01158f7e8ef89c7064.exe	MgQfxx.exe
PID 1208 wrote to memory of 2020	1208	335b1296fa572b01158f7e8ef89c7064.exe	MgQfxx.exe
PID 1208 wrote to memory of 2020	1208	335b1296fa572b01158f7e8ef89c7064.exe	MgQfxx.exe
PID 1208 wrote to memory of 2020	1208	335b1296fa572b01158f7e8ef89c7064.exe	MgQfxx.exe
PID 1208 wrote to memory of 1168	1208	335b1296fa572b01158f7e8ef89c7064.exe	WScript.exe
PID 1208 wrote to memory of 1168	1208	335b1296fa572b01158f7e8ef89c7064.exe	WScript.exe
PID 1208 wrote to memory of 1168	1208	335b1296fa572b01158f7e8ef89c7064.exe	WScript.exe
PID 1208 wrote to memory of 1168	1208	335b1296fa572b01158f7e8ef89c7064.exe	WScript.exe
PID 1168 wrote to memory of 268	1168	WScript.exe	cmd.exe
PID 1168 wrote to memory of 268	1168	WScript.exe	cmd.exe
PID 1168 wrote to memory of 268	1168	WScript.exe	cmd.exe
PID 1168 wrote to memory of 268	1168	WScript.exe	cmd.exe
PID 268 wrote to memory of 1836	268	cmd.exe	systemdll.exe
PID 268 wrote to memory of 1836	268	cmd.exe	systemdll.exe
PID 268 wrote to memory of 1836	268	cmd.exe	systemdll.exe
PID 268 wrote to memory of 1836	268	cmd.exe	systemdll.exe
PID 2020 wrote to memory of 1648	2020	MgQfxx.exe	cmd.exe
PID 2020 wrote to memory of 1648	2020	MgQfxx.exe	cmd.exe
PID 2020 wrote to memory of 1648	2020	MgQfxx.exe	cmd.exe
PID 2020 wrote to memory of 1648	2020	MgQfxx.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\335b1296fa572b01158f7e8ef89c7064.exe
"C:\Users\Admin\AppData\Local\Temp\335b1296fa572b01158f7e8ef89c7064.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1208

C:\Users\Admin\AppData\Local\Temp\MgQfxx.exe
C:\Users\Admin\AppData\Local\Temp\MgQfxx.exe
2⤵
- Executes dropped EXE
- Drops file in Program Files directory
- Suspicious use of WriteProcessMemory
PID:2020

C:\Windows\SysWOW64\cmd.exe
cmd /c ""C:\Users\Admin\AppData\Local\Temp\29fd4ec4.bat" "
3⤵
PID:1648

C:\Windows\SysWOW64\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
2⤵
- Suspicious use of WriteProcessMemory
PID:1168

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\system\systemdll.exe"
3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:268

C:\Users\Admin\AppData\Roaming\system\systemdll.exe
C:\Users\Admin\AppData\Roaming\system\systemdll.exe
4⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
PID:1836

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\29fd4ec4.bat
Filesize
187B

MD5
953637dc25f091f981ee5bd3eb4dfcc6

SHA1
311308cf2397f4af8b68145b820a4148c7c2f20c

SHA256
6c4c876872dd0e9e8c9af39e688765e62642c28938a5042c59a554432285aacc

SHA512
d12a6436e64ac9b853f504badd18537bb7abd9ffc12bd05ad1e3eb69c145a690bd95d08cacbd8f3035145098072b97930bdc14d5a48610449c09497450460a41

Download Submit
C:\Users\Admin\AppData\Local\Temp\MgQfxx.exe
Filesize
15KB

MD5
56b2c3810dba2e939a8bb9fa36d3cf96

SHA1
99ee31cd4b0d6a4b62779da36e0eeecdd80589fc

SHA256
4354970ccc7cd6bb16318f132c34f6a1b3d5c2ea7ff53e1c9271905527f2db07

SHA512
27812a9a034d7bd2ca73b337ae9e0b6dc79c38cfd1a2c6ac9d125d3cc8fa563c401a40d22155811d5054e5baa8cf8c8e7e03925f25fa856a9ba9dea708d15b4e

Download Submit
C:\Users\Admin\AppData\Local\Temp\MgQfxx.exe
Filesize
15KB

MD5
56b2c3810dba2e939a8bb9fa36d3cf96

SHA1
99ee31cd4b0d6a4b62779da36e0eeecdd80589fc

SHA256
4354970ccc7cd6bb16318f132c34f6a1b3d5c2ea7ff53e1c9271905527f2db07

SHA512
27812a9a034d7bd2ca73b337ae9e0b6dc79c38cfd1a2c6ac9d125d3cc8fa563c401a40d22155811d5054e5baa8cf8c8e7e03925f25fa856a9ba9dea708d15b4e

Download Submit
C:\Users\Admin\AppData\Local\Temp\install.vbs
Filesize
424B

MD5
d4b1736d1323baf583b4a714186af443

SHA1
99d475eaeddeeae86429aa63741032c22569e9e4

SHA256
e52e19416bf776679ddcc928e9859b69c9313234ab6ed82bfa2af33b90150b4d

SHA512
2377b5ad6f006ba516faafe3239bd4617b8c571b87e5b24a7e6b675af7e8d3c4dcaffa4acb6b74c1d637a2352ad87b86b733b4ced689798d73817ce67d22c0b3

Download Submit
C:\Users\Admin\AppData\Roaming\system\systemdll.exe
Filesize
479KB

MD5
335b1296fa572b01158f7e8ef89c7064

SHA1
4d41f80a6f2082acee991b6fdd830a3ae770ee6f

SHA256
4f660ee7d657778dc8c78514b1fa51f42decdfc61e1d609e6a7286ba2c20c70a

SHA512
a56e720d4ebcd2eab1949a796e6d46a355b6e507cda04f94d118543c95291b13802e24b118f7fe8dff26bc300fb5f7546ee73f9b7f1996453375b585a07b823e

Download Submit
C:\Users\Admin\AppData\Roaming\system\systemdll.exe
Filesize
479KB

MD5
335b1296fa572b01158f7e8ef89c7064

SHA1
4d41f80a6f2082acee991b6fdd830a3ae770ee6f

SHA256
4f660ee7d657778dc8c78514b1fa51f42decdfc61e1d609e6a7286ba2c20c70a

SHA512
a56e720d4ebcd2eab1949a796e6d46a355b6e507cda04f94d118543c95291b13802e24b118f7fe8dff26bc300fb5f7546ee73f9b7f1996453375b585a07b823e

Download Submit
\Users\Admin\AppData\Local\Temp\MgQfxx.exe
Filesize
15KB

MD5
56b2c3810dba2e939a8bb9fa36d3cf96

SHA1
99ee31cd4b0d6a4b62779da36e0eeecdd80589fc

SHA256
4354970ccc7cd6bb16318f132c34f6a1b3d5c2ea7ff53e1c9271905527f2db07

SHA512
27812a9a034d7bd2ca73b337ae9e0b6dc79c38cfd1a2c6ac9d125d3cc8fa563c401a40d22155811d5054e5baa8cf8c8e7e03925f25fa856a9ba9dea708d15b4e

Download Submit
\Users\Admin\AppData\Local\Temp\MgQfxx.exe
Filesize
15KB

MD5
56b2c3810dba2e939a8bb9fa36d3cf96

SHA1
99ee31cd4b0d6a4b62779da36e0eeecdd80589fc

SHA256
4354970ccc7cd6bb16318f132c34f6a1b3d5c2ea7ff53e1c9271905527f2db07

SHA512
27812a9a034d7bd2ca73b337ae9e0b6dc79c38cfd1a2c6ac9d125d3cc8fa563c401a40d22155811d5054e5baa8cf8c8e7e03925f25fa856a9ba9dea708d15b4e

Download Submit
\Users\Admin\AppData\Roaming\system\systemdll.exe
Filesize
479KB

MD5
335b1296fa572b01158f7e8ef89c7064

SHA1
4d41f80a6f2082acee991b6fdd830a3ae770ee6f

SHA256
4f660ee7d657778dc8c78514b1fa51f42decdfc61e1d609e6a7286ba2c20c70a

SHA512
a56e720d4ebcd2eab1949a796e6d46a355b6e507cda04f94d118543c95291b13802e24b118f7fe8dff26bc300fb5f7546ee73f9b7f1996453375b585a07b823e

Download Submit
\Users\Admin\AppData\Roaming\system\systemdll.exe
Filesize
479KB

MD5
335b1296fa572b01158f7e8ef89c7064

SHA1
4d41f80a6f2082acee991b6fdd830a3ae770ee6f

SHA256
4f660ee7d657778dc8c78514b1fa51f42decdfc61e1d609e6a7286ba2c20c70a

SHA512
a56e720d4ebcd2eab1949a796e6d46a355b6e507cda04f94d118543c95291b13802e24b118f7fe8dff26bc300fb5f7546ee73f9b7f1996453375b585a07b823e

Download Submit
memory/268-72-0x0000000000160000-0x00000000001DF000-memory.dmp

Filesize
508KB

Download
memory/268-66-0x0000000000000000-mapping.dmp

Download
memory/1168-61-0x0000000000000000-mapping.dmp

Download
memory/1208-62-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1208-54-0x00000000758D1000-0x00000000758D3000-memory.dmp

Filesize
8KB

Download
memory/1648-76-0x0000000000000000-mapping.dmp

Download
memory/1836-70-0x0000000000000000-mapping.dmp

Download
memory/1836-74-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1836-75-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2020-65-0x0000000000E70000-0x0000000000E79000-memory.dmp

Filesize
36KB

Download
memory/2020-77-0x0000000000E70000-0x0000000000E79000-memory.dmp

Filesize
36KB

Download
memory/2020-57-0x0000000000000000-mapping.dmp

Download