remcos | 49f60c0db83e07e9fb32099b6a54d5a03689500e4543ecf3d1b86eefe46f5d84

General

Target

2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.exe
Size

2.5MB
MD5

5ba3af74071e58c1f18c22ac35c6cbb7
SHA1

7ae9c93f0c69bc86cd7d1abcf34340667a2d791c
SHA256

2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0
SHA512

198fe5be5cbfb1be083a91b8c07ce00204cb925a7b605ad7f72648888ac5f723349694dcd0472cdc7271b40e2948ccee23c80cde31b23de837cff3945cbd4b8e
SSDEEP

49152:XwREDDMAfQRw4z0g3Q1edHeMxWrP+beY7UY714:XwREzfQRDzJQ1edMwZgN

Score

10^/10

remcos mentor discovery rat

Malware Config

Extracted

Family

remcos

Botnet

Mentor

C2

hulolawyo199jestie01.duckdns.org:4871

hulolawyo199jestie01.duckdns.org:4872

hulolawyo199jestie02.duckdns.org:4871

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
nabytrotis.dat
keylog_flag
false
keylog_path
%AppData%
mouse_option
false
mutex
janoutgurf-P6FGU2
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
1548	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.tmp
2268	fzxujk.exe

Loads dropped DLL 2 IoCs

pid	Process
2544	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.exe
1548	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.tmp

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2268 set thread context of 2748	2268	fzxujk.exe	32

System Location Discovery: System Language Discovery 1 TTPs 4 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	fzxujk.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	GoogleUpdateCore.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.tmp

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	fzxujk.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	fzxujk.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2748	GoogleUpdateCore.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2544 wrote to memory of 1548	2544	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.exe	30
PID 2544 wrote to memory of 1548	2544	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.exe	30
PID 2544 wrote to memory of 1548	2544	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.exe	30
PID 2544 wrote to memory of 1548	2544	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.exe	30
PID 2544 wrote to memory of 1548	2544	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.exe	30
PID 2544 wrote to memory of 1548	2544	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.exe	30
PID 2544 wrote to memory of 1548	2544	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.exe	30
PID 1548 wrote to memory of 2268	1548	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.tmp	31
PID 1548 wrote to memory of 2268	1548	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.tmp	31
PID 1548 wrote to memory of 2268	1548	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.tmp	31
PID 1548 wrote to memory of 2268	1548	2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.tmp	31
PID 2268 wrote to memory of 2748	2268	fzxujk.exe	32
PID 2268 wrote to memory of 2748	2268	fzxujk.exe	32
PID 2268 wrote to memory of 2748	2268	fzxujk.exe	32
PID 2268 wrote to memory of 2748	2268	fzxujk.exe	32
PID 2268 wrote to memory of 2748	2268	fzxujk.exe	32
PID 2268 wrote to memory of 2748	2268	fzxujk.exe	32
PID 2268 wrote to memory of 2748	2268	fzxujk.exe	32
PID 2268 wrote to memory of 2748	2268	fzxujk.exe	32
PID 2268 wrote to memory of 2748	2268	fzxujk.exe	32

C:\Users\Admin\AppData\Local\Temp\2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.exe
"C:\Users\Admin\AppData\Local\Temp\2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2544
- C:\Users\Admin\AppData\Local\Temp\is-RTM7L.tmp\2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-RTM7L.tmp\2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.tmp" /SL5="$40150,1651783,845824,C:\Users\Admin\AppData\Local\Temp\2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1548
- - C:\Users\Admin\AppData\Local\Temp\is-6G71N.tmp\fzxujk.exe
    "C:\Users\Admin\AppData\Local\Temp\is-6G71N.tmp\fzxujk.exe" C:\Users\Admin\AppData\Local\Temp\is-6G71N.tmp\script.a3x
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Checks processor information in registry
    - Suspicious use of WriteProcessMemory
    PID:2268
  - - C:\Program Files (x86)\Google\Update\1.3.36.151\GoogleUpdateCore.exe
      "C:\Program Files (x86)\Google\Update\1.3.36.151\GoogleUpdateCore.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:2748

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\is-6G71N.tmp\script.a3x

Filesize
653KB

MD5
9ca5723b051b92f691e7a7b429f79bca

SHA1
7824fc09ac6a7e8e7517e084e4bf28db4e68e991

SHA256
67ab963c9d63cf6343277d63bdd7160329d9a13597cc2f59233883d19adb0309

SHA512
9fa68bb561c31e9e2a5655b54f10df771777ac8eec76de757bedac0011893a8a547d52f0aca59a6d07624675d34766fa8bbede514a22432d58b1ab3775502638

Download Submit
\Users\Admin\AppData\Local\Temp\is-6G71N.tmp\fzxujk.exe

Filesize
872KB

MD5
c56b5f0201a3b3de53e561fe76912bfd

SHA1
2a4062e10a5de813f5688221dbeb3f3ff33eb417

SHA256
237d1bca6e056df5bb16a1216a434634109478f882d3b1d58344c801d184f95d

SHA512
195b98245bb820085ae9203cdb6d470b749d1f228908093e8606453b027b7d7681ccd7952e30c2f5dd40f8f0b999ccfc60ebb03419b574c08de6816e75710d2c

Download Submit
\Users\Admin\AppData\Local\Temp\is-RTM7L.tmp\2e6db642fad3918398b520cf655d6ca7fc040bd177e30a30bd7f549adb4e48c0.tmp

Filesize
3.2MB

MD5
e587511f17c07622f2e88bde6dc2a499

SHA1
08899e43445db2e0d000b3afd80e028636786eeb

SHA256
9fbf0748b5d890c2c28b1ae20aad7fc23a93cc7a57c4a51220d9381af7637c60

SHA512
2e59d9c525c5383c4ea66c785584aa69256a47ffe928a6595cc2bf07469d2da4dd56dcd3d3d42496e593c39eec6356fc4c8a9cdeee6770c7e6c3319b8b614c6e

Download Submit
memory/1548-8-0x0000000000B20000-0x0000000000E63000-memory.dmp

Filesize
3.3MB

Download
memory/1548-42-0x0000000000B20000-0x0000000000E63000-memory.dmp

Filesize
3.3MB

Download
memory/1548-36-0x0000000000B20000-0x0000000000E63000-memory.dmp

Filesize
3.3MB

Download
memory/2544-0-0x0000000000D10000-0x0000000000DEC000-memory.dmp

Filesize
880KB

Download
memory/2544-2-0x0000000000D11000-0x0000000000DB9000-memory.dmp

Filesize
672KB

Download
memory/2544-44-0x0000000000D10000-0x0000000000DEC000-memory.dmp

Filesize
880KB

Download
memory/2544-34-0x0000000000D10000-0x0000000000DEC000-memory.dmp

Filesize
880KB

Download
memory/2748-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-19-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-27-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-23-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-46-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-45-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-47-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-48-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-50-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-49-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-51-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2748-52-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download

Analysis

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