remcos | 1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f

General

Target

1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe
Size

742KB
MD5

be4cc819efcca915a682af25beb238de
SHA1

c169eb0ab2c50be64e06351363ea44b19839cb42
SHA256

1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f
SHA512

fc20220681ede15bde57ea5ebaec092629931585f436ed3e5e3e8ede333ea14453fcc63d6598292bfad6b3efe302c3597ceefa1695662eec2457630d611b65a8
SSDEEP

12288:RS4njtlFI1cX06F4EQWq4tvsRn/zE6w2FxU1QgUVEnSFV:c4njtlTk67q4tvsRn/HFatnSv

Score

10^/10

remcos benchao discovery rat

Malware Config

Extracted

Family

remcos

Botnet

benchao

C2

tochisglobal.ddns.net:6426

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-9R4HLX
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Loads dropped DLL 7 IoCs

pid	Process
4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe
4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe
4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe
4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe
4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe
4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe
4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe

Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs

pid	Process
2500	wab.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe
2500	wab.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4440 set thread context of 2500	4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe	97

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\Common Files\koeberens.int	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe

Drops file in Windows directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\resources\0409\dioptral.ini	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe
File opened for modification	C:\Windows\resources\0409\polymicrobial\Pappen33.mur	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.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 2 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	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	wab.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2500	wab.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4440 wrote to memory of 2500	4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe	97
PID 4440 wrote to memory of 2500	4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe	97
PID 4440 wrote to memory of 2500	4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe	97
PID 4440 wrote to memory of 2500	4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe	97
PID 4440 wrote to memory of 2500	4440	1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe	97

C:\Users\Admin\AppData\Local\Temp\1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe
"C:\Users\Admin\AppData\Local\Temp\1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.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:4440
- C:\Program Files (x86)\windows mail\wab.exe
  "C:\Users\Admin\AppData\Local\Temp\1c94594347e097f2175e02dbeac9d319c6ef8f673188ff5dfcd81b303e07803f.exe"
  2⤵
  - Suspicious use of NtCreateThreadExHideFromDebugger
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:2500

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

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\ProgramData\remcos\logs.dat

Filesize
144B

MD5
6cbfdc574e281312fd88e987dde725d5

SHA1
f3071e791abdc9503e7e0072fc1f719a9fa04ee9

SHA256
997f3511301dc08acba502b2a22a2fce45b195d4f678a23e6d7b535ac6f1c806

SHA512
a7772808a8196a4c115106643b6179959b2af1210416457cd1bf00e919016cc68cc0b34f82b712e8522e942e01f08ceda3141051a04103b42ff9720c57734593

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsvD40A.tmp\LangDLL.dll

Filesize
5KB

MD5
232f16c1cb21335fbce6f78ddaf2458c

SHA1
1c5981b852b3b640c98547074bda081c38859c3f

SHA256
507df75c959e1c9a89febb3f5d5963539895d9a602f4e6ca7898079919a83352

SHA512
cb8fb45ffe04e759816cb931223aafa42c15e58f1b35717f59a14c665aa94b48c393ff1a18ac480165ab090fed9226111ae2c3f4e9aead413a105c6f15515227

Download Submit
C:\Users\Admin\AppData\Local\Temp\nsvD40A.tmp\System.dll

Filesize
12KB

MD5
d6f54d2cefdf58836805796f55bfc846

SHA1
b980addc1a755b968dd5799179d3b4f1c2de9d2d

SHA256
f917aef484d1fbb4d723b2e2d3045cb6f5f664e61fbb3d5c577bd1c215de55d9

SHA512
ce67da936a93d46ef7e81abc8276787c82fd844c03630ba18afc3528c7e420c3228bfe82aeda083bb719f2d1314afae913362abd1e220cb364606519690d45db

Download Submit
C:\Users\Admin\AppData\Local\jonglrs.ini

Filesize
34B

MD5
e1d4b003063b31653a6595324fc561b5

SHA1
029ec032cc93d9f3fc056acef1ef2ad0e60535ef

SHA256
81a6b9a20bfb14e861456f381b0acae0cc4cc52d914824c347690a5ae7de2cff

SHA512
ae85e03e2d0e1f328537b90253f4d76debcfbf436133321de9602e613d72ec2bffe9e9aeebb39acdb2499257a98040631f797dac35dd5aa87e29d57d43572deb

Download Submit
memory/2500-49-0x0000000001000000-0x0000000002254000-memory.dmp

Filesize
18.3MB

Download
memory/2500-56-0x0000000001000000-0x0000000002254000-memory.dmp

Filesize
18.3MB

Download
memory/2500-40-0x00000000775F5000-0x00000000775F6000-memory.dmp

Filesize
4KB

Download
memory/2500-41-0x0000000001000000-0x0000000002254000-memory.dmp

Filesize
18.3MB

Download
memory/2500-46-0x0000000077551000-0x0000000077671000-memory.dmp

Filesize
1.1MB

Download
memory/2500-45-0x0000000001000000-0x0000000002254000-memory.dmp

Filesize
18.3MB

Download
memory/2500-79-0x0000000001000000-0x0000000002254000-memory.dmp

Filesize
18.3MB

Download
memory/2500-52-0x0000000001000000-0x0000000002254000-memory.dmp

Filesize
18.3MB

Download
memory/2500-76-0x0000000001000000-0x0000000002254000-memory.dmp

Filesize
18.3MB

Download
memory/2500-39-0x00000000775D8000-0x00000000775D9000-memory.dmp

Filesize
4KB

Download
memory/2500-59-0x0000000001000000-0x0000000002254000-memory.dmp

Filesize
18.3MB

Download
memory/2500-62-0x0000000001000000-0x0000000002254000-memory.dmp

Filesize
18.3MB

Download
memory/2500-65-0x0000000001000000-0x0000000002254000-memory.dmp

Filesize
18.3MB

Download
memory/2500-68-0x0000000001000000-0x0000000002254000-memory.dmp

Filesize
18.3MB

Download
memory/2500-71-0x0000000001000000-0x0000000002254000-memory.dmp

Filesize
18.3MB

Download
memory/2500-74-0x0000000001000000-0x0000000002254000-memory.dmp

Filesize
18.3MB

Download
memory/4440-37-0x0000000077551000-0x0000000077671000-memory.dmp

Filesize
1.1MB

Download
memory/4440-38-0x00000000741A5000-0x00000000741A6000-memory.dmp

Filesize
4KB

Download

Analysis

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