remcos | c3fe455b6952a4abcda157f240b3b9ee2925ef060b7bc5fe6d214875853867ad

General

Target

c3fe455b6952a4abcda157f240b3b9ee2925ef060b7bc5fe6d214875853867ad.exe
Size

1.8MB
MD5

56d303880d7dd7cc938af1e033c8fa0b
SHA1

55a5a6a829d3ad9799c546f6846150131ef89c1f
SHA256

c3fe455b6952a4abcda157f240b3b9ee2925ef060b7bc5fe6d214875853867ad
SHA512

e98c01d294d113c7dfc079504150e7c0f22b6e6f21cda3186679d24218ad8a8fa6005e59574af45813525ae49ab208c65302585a323488f69ebc04544f5c0a52

Score

10^/10

remcos 1 rat

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

1

C2

193.111.198.220:5861

Attributes

audio_folder
MicRecords
audio_path
%AppData%
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
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
Logs
keylog_path
%Temp%
mouse_option
false
mutex
5850Port-UAYNLL
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
remcos
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

Blocklisted process makes network request 31 IoCs

Processes:

cmd.exe

flow	pid	process
34	4536	cmd.exe
35	4536	cmd.exe
36	4536	cmd.exe
38	4536	cmd.exe
41	4536	cmd.exe
42	4536	cmd.exe
43	4536	cmd.exe
44	4536	cmd.exe
45	4536	cmd.exe
46	4536	cmd.exe
47	4536	cmd.exe
49	4536	cmd.exe
50	4536	cmd.exe
51	4536	cmd.exe
52	4536	cmd.exe
53	4536	cmd.exe
54	4536	cmd.exe
55	4536	cmd.exe
56	4536	cmd.exe
57	4536	cmd.exe
58	4536	cmd.exe
59	4536	cmd.exe
60	4536	cmd.exe
61	4536	cmd.exe
62	4536	cmd.exe
63	4536	cmd.exe
64	4536	cmd.exe
65	4536	cmd.exe
66	4536	cmd.exe
67	4536	cmd.exe
68	4536	cmd.exe

Executes dropped EXE 1 IoCs

Processes:

mdrs.exe

pid process

4928 mdrs.exe

pid	process
4928	mdrs.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

c3fe455b6952a4abcda157f240b3b9ee2925ef060b7bc5fe6d214875853867ad.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	c3fe455b6952a4abcda157f240b3b9ee2925ef060b7bc5fe6d214875853867ad.exe

Loads dropped DLL 2 IoCs

Processes:

mdrs.exe

pid process

4928 mdrs.exe
4928 mdrs.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

mdrs.exenslookup.exe

pid process

4928 mdrs.exe
4868 nslookup.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

nslookup.exe

pid process

4868 nslookup.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

mdrs.execmd.exe

pid process

4928 mdrs.exe
4536 cmd.exe

pid	process
4928	mdrs.exe
4928	mdrs.exe

pid	process
4928	mdrs.exe
4868	nslookup.exe

pid	process
4868	nslookup.exe

pid	process
4928	mdrs.exe
4536	cmd.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

c3fe455b6952a4abcda157f240b3b9ee2925ef060b7bc5fe6d214875853867ad.exemdrs.exe

description	pid	process	target process
PID 3744 wrote to memory of 4928	3744	c3fe455b6952a4abcda157f240b3b9ee2925ef060b7bc5fe6d214875853867ad.exe	mdrs.exe
PID 3744 wrote to memory of 4928	3744	c3fe455b6952a4abcda157f240b3b9ee2925ef060b7bc5fe6d214875853867ad.exe	mdrs.exe
PID 3744 wrote to memory of 4928	3744	c3fe455b6952a4abcda157f240b3b9ee2925ef060b7bc5fe6d214875853867ad.exe	mdrs.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe
PID 4928 wrote to memory of 4868	4928	mdrs.exe	nslookup.exe

C:\Users\Admin\AppData\Local\Temp\c3fe455b6952a4abcda157f240b3b9ee2925ef060b7bc5fe6d214875853867ad.exe
"C:\Users\Admin\AppData\Local\Temp\c3fe455b6952a4abcda157f240b3b9ee2925ef060b7bc5fe6d214875853867ad.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3744

C:\Users\Admin\AppData\Local\Temp\RarSFX0\mdrs.exe
"C:\Users\Admin\AppData\Local\Temp\RarSFX0\mdrs.exe"
2⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4928

C:\Windows\SysWOW64\nslookup.exe
"C:\Windows\system32\nslookup.exe"
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
PID:4868

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe"
4⤵
- Blocklisted process makes network request
- Suspicious use of SetWindowsHookEx
PID:4536

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\RarSFX0\libcrypto-1_1.dll
Filesize
4.5MB

MD5
d73134c0b780595c6c95f8568c1f81a7

SHA1
19bd711b9d66df0353f5d74ae9ef6c30909dba78

SHA256
0221fa75ad37f1a90092eb34171740b9f735eda0f50f2f4e7b62fcc9f7a62d70

SHA512
e2e6659efdd82ab817c61cfb40669736c2db8c73737de571df7470f5477730e03cb32910e31304fba27dba754de80f7dbe8bdef73a280299b3d9fd307dbea176

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\libcrypto-1_1.dll
Filesize
4.5MB

MD5
d73134c0b780595c6c95f8568c1f81a7

SHA1
19bd711b9d66df0353f5d74ae9ef6c30909dba78

SHA256
0221fa75ad37f1a90092eb34171740b9f735eda0f50f2f4e7b62fcc9f7a62d70

SHA512
e2e6659efdd82ab817c61cfb40669736c2db8c73737de571df7470f5477730e03cb32910e31304fba27dba754de80f7dbe8bdef73a280299b3d9fd307dbea176

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\libcrypto-1_1.dll
Filesize
4.5MB

MD5
d73134c0b780595c6c95f8568c1f81a7

SHA1
19bd711b9d66df0353f5d74ae9ef6c30909dba78

SHA256
0221fa75ad37f1a90092eb34171740b9f735eda0f50f2f4e7b62fcc9f7a62d70

SHA512
e2e6659efdd82ab817c61cfb40669736c2db8c73737de571df7470f5477730e03cb32910e31304fba27dba754de80f7dbe8bdef73a280299b3d9fd307dbea176

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\mdrs.exe
Filesize
630KB

MD5
7215c1b9693b1394aaa7c86dcd741ad7

SHA1
290dda9a0f85cf5f119cb726e4f5d86696672bbc

SHA256
1d2914c04b213029550eba1e0c0b40e36a32b443a76efc9c2f779e8b9448bdd5

SHA512
e79b8a8ffbf75a17ab8b16752d3da68be9c6f7c50fedf4a6049da2393ff8b1b43e1f9cd9b9bfdc06c8b62764031d959962cfc11898bd81bf22a9970d6c63b945

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\mdrs.exe
Filesize
630KB

MD5
7215c1b9693b1394aaa7c86dcd741ad7

SHA1
290dda9a0f85cf5f119cb726e4f5d86696672bbc

SHA256
1d2914c04b213029550eba1e0c0b40e36a32b443a76efc9c2f779e8b9448bdd5

SHA512
e79b8a8ffbf75a17ab8b16752d3da68be9c6f7c50fedf4a6049da2393ff8b1b43e1f9cd9b9bfdc06c8b62764031d959962cfc11898bd81bf22a9970d6c63b945

Download Submit
memory/4536-143-0x0000000000000000-mapping.dmp

Download
memory/4536-153-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4536-152-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4536-145-0x00000000005F0000-0x00000000005F8000-memory.dmp

Filesize
32KB

Download
memory/4536-144-0x00007FFD85470000-0x00007FFD85665000-memory.dmp

Filesize
2.0MB

Download
memory/4868-140-0x00007FFD85470000-0x00007FFD85665000-memory.dmp

Filesize
2.0MB

Download
memory/4868-142-0x0000000004B17000-0x0000000004B27000-memory.dmp

Filesize
64KB

Download
memory/4868-141-0x0000000000D80000-0x0000000000D88000-memory.dmp

Filesize
32KB

Download
memory/4868-139-0x0000000004B10000-0x0000000004B46000-memory.dmp

Filesize
216KB

Download
memory/4868-150-0x0000000004B17000-0x0000000004B27000-memory.dmp

Filesize
64KB

Download
memory/4868-136-0x0000000000000000-mapping.dmp

Download
memory/4928-130-0x0000000000000000-mapping.dmp

Download
memory/4928-138-0x0000000001F70000-0x0000000001F7A000-memory.dmp

Filesize
40KB

Download
memory/4928-137-0x0000000001F70000-0x0000000001F7A000-memory.dmp

Filesize
40KB

Download
memory/4928-135-0x0000000001A81000-0x0000000001E56000-memory.dmp

Filesize
3.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads