remcos | 0e51d9a05ced1a052a3d1e040c77d7e2159f5337739d69521d14dacbb599a0bd

General

Target

3563d53e5d239655686b28e74442222e.exe
Size

1.4MB
MD5

3563d53e5d239655686b28e74442222e
SHA1

27aa08fdf838f9cfd7eceb7e6d2df148e3e7df07
SHA256

0e51d9a05ced1a052a3d1e040c77d7e2159f5337739d69521d14dacbb599a0bd
SHA512

0c145b3f63f7ece8b8cda919da7e806ded3dcb5575402c155c6372aaf8579a7944f4ea9294a91c78fdba665a02a2b975d8083cd563614cd97c5be98330198687
SSDEEP

24576:e6yJMY9UFoRDhkeYM1jJR97zUbia9JVe0hs5WfBiERJchVML1bT6EQ:pY9UORVOM1jJHzaiape0hsABFRJch6LE

Score

10^/10

remcos graced rat rezer0 upx

Malware Config

Extracted

Family

remcos

Version

2.5.0 Pro

Botnet

GRACED

C2

thankyoulord.ddns.net:5050

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-0S5XD9
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

ReZer0 packer 1 IoCs

Detects ReZer0, a packer with multiple versions used in various campaigns.

rezer0

resource	yara_rule
behavioral2/memory/3388-14-0x00000000058B0000-0x00000000058DC000-memory.dmp	rezer0

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-996941297-2279405024-2328152752-1000\Control Panel\International\Geo\Nation	test.exe

Executes dropped EXE 1 IoCs

pid	Process
3388	test.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/1568-0-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/1568-1-0x0000000000400000-0x00000000006F1000-memory.dmp	upx
behavioral2/memory/1568-29-0x0000000000400000-0x00000000006F1000-memory.dmp	upx

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3388 set thread context of 2960	3388	test.exe	103

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
3864	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3388	test.exe
3388	test.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3388	test.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 1568 wrote to memory of 1208	1568	3563d53e5d239655686b28e74442222e.exe	93
PID 1568 wrote to memory of 1208	1568	3563d53e5d239655686b28e74442222e.exe	93
PID 1568 wrote to memory of 1208	1568	3563d53e5d239655686b28e74442222e.exe	93
PID 1208 wrote to memory of 3388	1208	cmd.exe	96
PID 1208 wrote to memory of 3388	1208	cmd.exe	96
PID 1208 wrote to memory of 3388	1208	cmd.exe	96
PID 3388 wrote to memory of 3864	3388	test.exe	101
PID 3388 wrote to memory of 3864	3388	test.exe	101
PID 3388 wrote to memory of 3864	3388	test.exe	101
PID 3388 wrote to memory of 2960	3388	test.exe	103
PID 3388 wrote to memory of 2960	3388	test.exe	103
PID 3388 wrote to memory of 2960	3388	test.exe	103
PID 3388 wrote to memory of 2960	3388	test.exe	103
PID 3388 wrote to memory of 2960	3388	test.exe	103
PID 3388 wrote to memory of 2960	3388	test.exe	103
PID 3388 wrote to memory of 2960	3388	test.exe	103
PID 3388 wrote to memory of 2960	3388	test.exe	103
PID 3388 wrote to memory of 2960	3388	test.exe	103
PID 3388 wrote to memory of 2960	3388	test.exe	103

C:\Users\Admin\AppData\Local\Temp\3563d53e5d239655686b28e74442222e.exe
"C:\Users\Admin\AppData\Local\Temp\3563d53e5d239655686b28e74442222e.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1568
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c test.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1208
- - C:\Users\Admin\AppData\Local\Temp\test.exe
    test.exe
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3388
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\vXAlJeWc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp51E4.tmp"
      4⤵
      Creates scheduled task(s)
      PID:3864
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "{path}"
      4⤵
      PID:2960

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scripting

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Scripting

1

T1064

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\test.exe

Filesize
330KB

MD5
261aa73f93c90dcec0c36a51cb9b5dee

SHA1
b0c41e06cd2ded81706820423db40bf8fea2c957

SHA256
ae160b749914bd56aecbcf43d56a59bde2069a145682b2911fe50c6adabe1b54

SHA512
7b90335b4a7db7b5056f6d60db642754038dc544bd2c1f82e68b1f8e339bf70227f0c08d157b4ca1004448fab7d109f0239196f242d0edeab978de9025a3c0ed

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp51E4.tmp

Filesize
1KB

MD5
7e801005c70299e4a5a3a83253c1e582

SHA1
71e012503c55201cf1eb7bda08ab1406d7e28937

SHA256
0b842ba607ed3ddc04c6bdf77fce6f804964bbf059bbd4554cc7a2498750ec3d

SHA512
f68621204878403a23c08b1014539cfb8b6a45e183247acaab61829aead4699b73e308a46e2922186439e0e067f070478b9ef64001e3aec28d7442a38133a70a

Download Submit
memory/1568-0-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/1568-1-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/1568-29-0x0000000000400000-0x00000000006F1000-memory.dmp

Filesize
2.9MB

Download
memory/2960-30-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2960-27-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2960-28-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2960-25-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/2960-22-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3388-15-0x0000000005980000-0x0000000005A1C000-memory.dmp

Filesize
624KB

Download
memory/3388-14-0x00000000058B0000-0x00000000058DC000-memory.dmp

Filesize
176KB

Download
memory/3388-13-0x0000000004D80000-0x0000000004D88000-memory.dmp

Filesize
32KB

Download
memory/3388-12-0x0000000004D90000-0x0000000004D9A000-memory.dmp

Filesize
40KB

Download
memory/3388-11-0x0000000005040000-0x0000000005050000-memory.dmp

Filesize
64KB

Download
memory/3388-26-0x00000000745A0000-0x0000000074D50000-memory.dmp

Filesize
7.7MB

Download
memory/3388-10-0x0000000004DC0000-0x0000000004E52000-memory.dmp

Filesize
584KB

Download
memory/3388-9-0x00000000052D0000-0x0000000005874000-memory.dmp

Filesize
5.6MB

Download
memory/3388-7-0x00000000745A0000-0x0000000074D50000-memory.dmp

Filesize
7.7MB

Download
memory/3388-6-0x0000000000330000-0x0000000000388000-memory.dmp

Filesize
352KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads