remcos | 8df2560a6e04ee9c1d4bdc98564d30ec55ab833cb58f1e92e384d50a4bdb88b3

General

Target

6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe
Size

404KB
MD5

af1266aefcde379985bdd3a8aa9ea541
SHA1

ffa9044daad7a4e690a9bfaeb49e9e11dac3871d
SHA256

7cd9ba0bd060a7ab75cbb1c3a99caf86dbef34142243ad40b1eff42b3a836701
SHA512

9c620d18305f69f8c43a36dcabb2a91d9aaceded47a945f36d6884d582404f5b00e0a4141eb5596c2a5a4000d31419c0900467185c9a25c3b87c93f6814e4735
SSDEEP

6144:LtOz4k96TGA6Dh3H6KnEJrFrC2a0mEnxgoj6e:JFM8Xs6/rJCPo36

Score

10^/10

remcos importante discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.8.1 Pro

Botnet

Importante

C2

1.qy92v8t2ot.in:19850

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
crrcs.exe
copy_folder
Windows
delete_file
false
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
ERDATYFVUASG_AGSJHDJDJG-MXZ0UN
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
1
startup_value
crrcs.exe
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
2988	crrcs.exe

Loads dropped DLL 2 IoCs

pid	Process
2680	cmd.exe
2680	cmd.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-457978338-2990298471-2379561640-1000\Software\Microsoft\Windows\CurrentVersion\Run\crrcs.exe = "\"C:\\Users\\Admin\\AppData\\Roaming\\Windows\\crrcs.exe\""	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\crrcs.exe = "\"C:\\Users\\Admin\\AppData\\Roaming\\Windows\\crrcs.exe\""	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-457978338-2990298471-2379561640-1000\Software\Microsoft\Windows\CurrentVersion\Run\crrcs.exe = "\"C:\\Users\\Admin\\AppData\\Roaming\\Windows\\crrcs.exe\""	crrcs.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\crrcs.exe = "\"C:\\Users\\Admin\\AppData\\Roaming\\Windows\\crrcs.exe\""	crrcs.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 3 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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
2780	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2780	PING.EXE

Suspicious behavior: EnumeratesProcesses 20 IoCs

pid	Process
2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe
2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe
2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe
2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe
2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe
2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe
2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe
2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe
2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe
2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe
2988	crrcs.exe
2988	crrcs.exe
2988	crrcs.exe
2988	crrcs.exe
2988	crrcs.exe
2988	crrcs.exe
2988	crrcs.exe
2988	crrcs.exe
2988	crrcs.exe
2988	crrcs.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2988	crrcs.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2220 wrote to memory of 2680	2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe	30
PID 2220 wrote to memory of 2680	2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe	30
PID 2220 wrote to memory of 2680	2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe	30
PID 2220 wrote to memory of 2680	2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe	30
PID 2220 wrote to memory of 2680	2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe	30
PID 2220 wrote to memory of 2680	2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe	30
PID 2220 wrote to memory of 2680	2220	6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe	30
PID 2680 wrote to memory of 2780	2680	cmd.exe	32
PID 2680 wrote to memory of 2780	2680	cmd.exe	32
PID 2680 wrote to memory of 2780	2680	cmd.exe	32
PID 2680 wrote to memory of 2780	2680	cmd.exe	32
PID 2680 wrote to memory of 2988	2680	cmd.exe	33
PID 2680 wrote to memory of 2988	2680	cmd.exe	33
PID 2680 wrote to memory of 2988	2680	cmd.exe	33
PID 2680 wrote to memory of 2988	2680	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe
"C:\Users\Admin\AppData\Local\Temp\6151020856893567865167816635285013215210991470256784766551279783004746857124141939426271390490712497.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:2220
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
  2⤵
  - Loads dropped DLL
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2680
- - C:\Windows\SysWOW64\PING.EXE
    PING 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2780
- - C:\Users\Admin\AppData\Roaming\Windows\crrcs.exe
    "C:\Users\Admin\AppData\Roaming\Windows\crrcs.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of SetWindowsHookEx
    PID:2988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Remote System Discovery

1

T1018

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.bat

Filesize
99B

MD5
fb7ebc8b9cda8210a4dd5f3231d17d4e

SHA1
a4afd7922bc5979407a328cf07be8e5653528870

SHA256
c1e6cc9523cd3714ccd429ad0a3d006953dbf5dfac92587b7632cea6846277b4

SHA512
00e8faad9065b93be812df238872fd3934716f1d01d21207c2586d9a19eddaa10e7435185219803014c6b8848d0f572141aa27f79cc7bba39b4d942cbb3b8e0b

Download Submit
\Users\Admin\AppData\Roaming\Windows\crrcs.exe

Filesize
404KB

MD5
af1266aefcde379985bdd3a8aa9ea541

SHA1
ffa9044daad7a4e690a9bfaeb49e9e11dac3871d

SHA256
7cd9ba0bd060a7ab75cbb1c3a99caf86dbef34142243ad40b1eff42b3a836701

SHA512
9c620d18305f69f8c43a36dcabb2a91d9aaceded47a945f36d6884d582404f5b00e0a4141eb5596c2a5a4000d31419c0900467185c9a25c3b87c93f6814e4735

Download Submit
memory/2220-0-0x00000000002C0000-0x000000000033B000-memory.dmp

Filesize
492KB

Download
memory/2220-1-0x000000007719F000-0x00000000771A0000-memory.dmp

Filesize
4KB

Download
memory/2220-2-0x0000000000401000-0x000000000041A000-memory.dmp

Filesize
100KB

Download
memory/2220-15-0x0000000000401000-0x000000000041A000-memory.dmp

Filesize
100KB

Download
memory/2220-14-0x00000000002C0000-0x000000000033B000-memory.dmp

Filesize
492KB

Download
memory/2220-13-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-28-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-33-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-23-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-27-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-21-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-29-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-30-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-31-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-32-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-22-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-34-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-35-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-36-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-37-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-38-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-39-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download
memory/2988-40-0x0000000000400000-0x000000000065C000-memory.dmp

Filesize
2.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads