remcos | 28f5fb6f5afd8932e3c365e3af55b56c9b4d0f964ecb4df5710305ce77d9b4b2

Analysis

max time kernel
600s
max time network
602s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
21-03-2023 15:37

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General

Target

Agreement documents.exe
Size

2.3MB
MD5

594307a3a85f02d66348cd0fdf16491c
SHA1

89eb99bff35531c828dd9d6b1da84e0ca4f6c1b7
SHA256

34f6c9c56b8193c469694a1e0033dd03e751be111ed356aee435a8aed96c2a15
SHA512

dfa247154c78aaccc8cfe68a68a89c58808a01ef5878c536455cb80af6805a4d01efc0b8d23b9b9014b09119c90ea141abcae76f644f967ba9c19f0e9a77ec95
SSDEEP

24576:yX6ZYD2WTPUKtu1Dze6HDpLAq3di1mBHrmszBf8sM7BfkvkOkOyHVxxBIGkKY9aR:k6ZYDEDzyEcFpPl3WIE

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Version

2.7.1 Pro

Botnet

RemoteHost

march4great.ddns.net:2409

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-43G52Y
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

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:

Agreement documents.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	Agreement documents.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Agreement documents.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Ucbjzlfiwd = "\"C:\\Users\\Admin\\AppData\\Roaming\\Owtaohla\\Ucbjzlfiwd.exe\""	Agreement documents.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Agreement documents.exe

description pid process target process

PID 4496 set thread context of 4468 4496 Agreement documents.exe Agreement documents.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 4496 set thread context of 4468	4496	Agreement documents.exe	Agreement documents.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

Processes:

powershell.exeAgreement documents.exe

pid	process
3792	powershell.exe
3792	powershell.exe
4496	Agreement documents.exe
4496	Agreement documents.exe
4496	Agreement documents.exe
4496	Agreement documents.exe
4496	Agreement documents.exe
4496	Agreement documents.exe
4496	Agreement documents.exe
4496	Agreement documents.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

Agreement documents.exe

pid process

4468 Agreement documents.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeAgreement documents.exe

description pid process

Token: SeDebugPrivilege 3792 powershell.exe
Token: SeDebugPrivilege 4496 Agreement documents.exe

pid	process
4468	Agreement documents.exe

description	pid	process
Token: SeDebugPrivilege	3792	powershell.exe
Token: SeDebugPrivilege	4496	Agreement documents.exe

Suspicious use of WriteProcessMemory 25 IoCs

Processes:

Agreement documents.exe

description	pid	process	target process
PID 4496 wrote to memory of 3792	4496	Agreement documents.exe	powershell.exe
PID 4496 wrote to memory of 3792	4496	Agreement documents.exe	powershell.exe
PID 4496 wrote to memory of 3792	4496	Agreement documents.exe	powershell.exe
PID 4496 wrote to memory of 3124	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 3124	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 3124	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 2080	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 2080	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 2080	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 5000	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 5000	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 5000	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 1632	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 1632	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 1632	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 4468	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 4468	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 4468	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 4468	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 4468	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 4468	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 4468	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 4468	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 4468	4496	Agreement documents.exe	Agreement documents.exe
PID 4496 wrote to memory of 4468	4496	Agreement documents.exe	Agreement documents.exe

C:\Users\Admin\AppData\Local\Temp\Agreement documents.exe
"C:\Users\Admin\AppData\Local\Temp\Agreement documents.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4496

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3792

C:\Users\Admin\AppData\Local\Temp\Agreement documents.exe
"C:\Users\Admin\AppData\Local\Temp\Agreement documents.exe"
2⤵
PID:3124

C:\Users\Admin\AppData\Local\Temp\Agreement documents.exe
"C:\Users\Admin\AppData\Local\Temp\Agreement documents.exe"
2⤵
PID:2080

C:\Users\Admin\AppData\Local\Temp\Agreement documents.exe
"C:\Users\Admin\AppData\Local\Temp\Agreement documents.exe"
2⤵
PID:5000

C:\Users\Admin\AppData\Local\Temp\Agreement documents.exe
"C:\Users\Admin\AppData\Local\Temp\Agreement documents.exe"
2⤵
PID:1632

C:\Users\Admin\AppData\Local\Temp\Agreement documents.exe
"C:\Users\Admin\AppData\Local\Temp\Agreement documents.exe"
2⤵
- Suspicious behavior: GetForegroundWindowSpam
PID:4468

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ecl5l0fd.ctn.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3792-150-0x00000000054E0000-0x00000000054F0000-memory.dmp

Filesize
64KB

Download
memory/3792-137-0x0000000005B20000-0x0000000006148000-memory.dmp

Filesize
6.2MB

Download
memory/3792-138-0x0000000005930000-0x0000000005996000-memory.dmp

Filesize
408KB

Download
memory/3792-139-0x0000000006250000-0x00000000062B6000-memory.dmp

Filesize
408KB

Download
memory/3792-149-0x00000000054E0000-0x00000000054F0000-memory.dmp

Filesize
64KB

Download
memory/3792-157-0x00000000054E0000-0x00000000054F0000-memory.dmp

Filesize
64KB

Download
memory/3792-151-0x0000000006850000-0x000000000686E000-memory.dmp

Filesize
120KB

Download
memory/3792-152-0x00000000080B0000-0x000000000872A000-memory.dmp

Filesize
6.5MB

Download
memory/3792-153-0x0000000006D50000-0x0000000006D6A000-memory.dmp

Filesize
104KB

Download
memory/3792-154-0x00000000054E0000-0x00000000054F0000-memory.dmp

Filesize
64KB

Download
memory/3792-156-0x00000000054E0000-0x00000000054F0000-memory.dmp

Filesize
64KB

Download
memory/3792-136-0x0000000003260000-0x0000000003296000-memory.dmp

Filesize
216KB

Download
memory/3792-158-0x00000000054E0000-0x00000000054F0000-memory.dmp

Filesize
64KB

Download
memory/4468-187-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-194-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-228-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-163-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-166-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-167-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-168-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-169-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-171-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-172-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-173-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-174-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-175-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-176-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-177-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-178-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-179-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-180-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-181-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-182-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-183-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-184-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-185-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-186-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-227-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-188-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-189-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-190-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-191-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-192-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-193-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-226-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-195-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-196-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-197-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-198-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-199-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-200-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-201-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-202-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-203-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-204-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-205-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-206-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-207-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-208-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-209-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-210-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-211-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-212-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-213-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-214-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-215-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-218-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-219-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-220-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-221-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-222-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4468-223-0x0000000000400000-0x0000000000421000-memory.dmp

Filesize
132KB

Download
memory/4496-135-0x00000000054F0000-0x0000000005500000-memory.dmp

Filesize
64KB

Download
memory/4496-133-0x0000000000870000-0x0000000000ABC000-memory.dmp

Filesize
2.3MB

Download
memory/4496-134-0x0000000005BE0000-0x0000000005C02000-memory.dmp

Filesize
136KB

Download
memory/4496-155-0x00000000054F0000-0x0000000005500000-memory.dmp

Filesize
64KB

Download