remcos | dcdc99a71af2d3db2cb3004dd3e91a4908d71a876179b447ed116742cff8ba3b

Analysis

max time kernel
148s
max time network
150s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
10-04-2024 07:58

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General

Target

dcdc99a71af2d3db2cb3004dd3e91a4908d71a876179b447ed116742cff8ba3b.exe
Size

721KB
MD5

ed8504a7a6f3377d677b97526a376e81
SHA1

86a0376de9b9ee12f86ed24091bc151ebae7d147
SHA256

dcdc99a71af2d3db2cb3004dd3e91a4908d71a876179b447ed116742cff8ba3b
SHA512

624bd34a11ebc86976bfd36385c79cf1730f81ce16f1c4fbf8076e226056219deb132e629297729b415c3721114425ae12f3da8ff34a1e60827d0588e7b74397
SSDEEP

12288:/anyMm4/gn9Otfj8QwCHPInVyTnT6+lyZsIhqV4mfSoi1f5N/yCjcbvsqUpR:5Mh+aNwSPInVyFlONhq2mKD3/yCjYpuR

Score

10^/10

remcos treintayocho rat

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

TREINTAYOCHO

treintayochorem.duckdns.org:1010

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
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-H7ZOSI
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 5 IoCs

Processes:

cmd.exe

flow pid process

3 2388 cmd.exe
4 2388 cmd.exe
5 2388 cmd.exe
7 2388 cmd.exe
9 2388 cmd.exe
Loads dropped DLL 1 IoCs

Processes:

rundll32.exe

pid process

1140 rundll32.exe
Drops file in Windows directory 1 IoCs

Processes:

cmd.exe

description ioc process

File created C:\Windows\Tasks\msfeedssync.job cmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

rundll32.exe

pid process

1140 rundll32.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

rundll32.exe

pid process

1140 rundll32.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

cmd.exe

pid process

2388 cmd.exe

flow	pid	process
3	2388	cmd.exe
4	2388	cmd.exe
5	2388	cmd.exe
7	2388	cmd.exe
9	2388	cmd.exe

pid	process
1140	rundll32.exe

description	ioc	process
File created	C:\Windows\Tasks\msfeedssync.job	cmd.exe

pid	process
1140	rundll32.exe

pid	process
1140	rundll32.exe

pid	process
2388	cmd.exe

Suspicious use of WriteProcessMemory 52 IoCs

Processes:

dcdc99a71af2d3db2cb3004dd3e91a4908d71a876179b447ed116742cff8ba3b.exerundll32.exe

description	pid	process	target process
PID 2224 wrote to memory of 1140	2224	dcdc99a71af2d3db2cb3004dd3e91a4908d71a876179b447ed116742cff8ba3b.exe	rundll32.exe
PID 2224 wrote to memory of 1140	2224	dcdc99a71af2d3db2cb3004dd3e91a4908d71a876179b447ed116742cff8ba3b.exe	rundll32.exe
PID 2224 wrote to memory of 1140	2224	dcdc99a71af2d3db2cb3004dd3e91a4908d71a876179b447ed116742cff8ba3b.exe	rundll32.exe
PID 2224 wrote to memory of 1140	2224	dcdc99a71af2d3db2cb3004dd3e91a4908d71a876179b447ed116742cff8ba3b.exe	rundll32.exe
PID 2224 wrote to memory of 1140	2224	dcdc99a71af2d3db2cb3004dd3e91a4908d71a876179b447ed116742cff8ba3b.exe	rundll32.exe
PID 2224 wrote to memory of 1140	2224	dcdc99a71af2d3db2cb3004dd3e91a4908d71a876179b447ed116742cff8ba3b.exe	rundll32.exe
PID 2224 wrote to memory of 1140	2224	dcdc99a71af2d3db2cb3004dd3e91a4908d71a876179b447ed116742cff8ba3b.exe	rundll32.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe
PID 1140 wrote to memory of 2388	1140	rundll32.exe	cmd.exe

C:\Users\Admin\AppData\Local\Temp\dcdc99a71af2d3db2cb3004dd3e91a4908d71a876179b447ed116742cff8ba3b.exe
"C:\Users\Admin\AppData\Local\Temp\dcdc99a71af2d3db2cb3004dd3e91a4908d71a876179b447ed116742cff8ba3b.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:2224

C:\Windows\SysWOW64\rundll32.exe
rundll32.exe PartiShikari,Hurley
2⤵
- Loads dropped DLL
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1140

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\system32\cmd.exe"
3⤵
- Blocklisted process makes network request
- Drops file in Windows directory
- Suspicious use of SetWindowsHookEx
PID:2388

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Capercaillie
Filesize
626KB

MD5
b9239ef2ea3c8a042259de2001a1b447

SHA1
3f599a1247c4c58ac20674cfba24e1383cee9072

SHA256
f6506d4b516addd8550689bb0d55ecf0731f3740e76c3e27c714e877f941da32

SHA512
2d3026f0c5beea03cf3ce3bb6f07c8e9084d8b149df2ed954cd4b10583305571a57bc48a4aa1f32ec54db12fde81c752ffc758cec686bbfea92c99648ced473e

Download Submit
C:\Users\Admin\AppData\Local\Temp\PartiShikari.DLL
Filesize
50KB

MD5
8aec2b9bf7b0156601b5738445c89afb

SHA1
72a3cf230083d1b882181bda3320ee5592a058d2

SHA256
e288f1292df61e692e2ba9f2a163bcaa620403b30fad40155c37edc9c9e53f76

SHA512
a92939475c2d0ac2331428d42628fc035ef98b3bb7ff9c154d99b441a38e11419de74fea0b07765de695dc02f0610ac9aba2ce7f82d500703b87f5f1183fe9ba

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\logs.dat
Filesize
74B

MD5
ab8c8d63a017b92cf79f086a1c1a8d59

SHA1
c546960cb2b53bab3056a059e6649450be9e9d3a

SHA256
b7d9594af6a781d1bd73eec61fcd3835365f3bab2d9a6dbd0e99ef6fb44be5f3

SHA512
3b0ededd6834a0e19d8e6bb1d82713ef9381d4d1274252e5875a78183bb288f9fa80598fa1e323a8dc5503cabaf261c40019cbd3effa152b1a74550b8040348a

Download Submit
memory/1140-16-0x0000000000160000-0x0000000000162000-memory.dmp

Filesize
8KB

Download
memory/1140-15-0x00000000747E0000-0x0000000074838000-memory.dmp

Filesize
352KB

Download
memory/1140-17-0x0000000076F80000-0x0000000076FB5000-memory.dmp

Filesize
212KB

Download
memory/1140-18-0x00000000773D0000-0x0000000077579000-memory.dmp

Filesize
1.7MB

Download
memory/1140-27-0x00000000747E0000-0x0000000074838000-memory.dmp

Filesize
352KB

Download
memory/2388-21-0x0000000000090000-0x0000000000096000-memory.dmp

Filesize
24KB

Download
memory/2388-22-0x00000000773D0000-0x0000000077579000-memory.dmp

Filesize
1.7MB

Download
memory/2388-20-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2388-31-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2388-32-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2388-34-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2388-35-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2388-38-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2388-19-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download