remcos | bca0f84530687df0192d79ce7bc1f1359c5ffccbbba864006d525697a964bfca

Analysis

max time kernel
150s
max time network
154s
platform
windows7_x64
resource
win7-20240508-en
resource tags

arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
submitted
19/05/2024, 18:10

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General

Target
5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe
Size 299KB
Sample240519-wr9blaah8x
SHA256 bca0f84530687df0192d79ce7bc1f1359c5ffccbbba864006d525697a964bfca
MD5 5ab7ab87a1164876f8515a82ec11a51d
SHA1 4268a9c421a1c37695acc67435334269ac8622ec
SHA512 686348f82ecac03181776e153c9f8b6219ce3e5e057f1e6ba42182e0fa075832f5284a36a05d5e90a96dfef7fd8b6f7b905d69ce97d68a6e8553fbb2bc55a8b8
SSDEEP 6144:yYyF0obZta3EvmYd86ouD8XDoqHBnnvlvHZIjRFq0WLaL:y5F0ofoe86ow8XDo2BnnvpHY8a
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos remcos20 persistence rat

Malware Config

Extracted

Family

remcos

Version

2.0.0 Pro

Botnet

REMCOS20

casillas.hicam.net:2404
casillasmx.chickenkiller.com:2404
casillas45.hopto.org:2404
casillas.libfoobar.so:2404
du4alr0ute.sendsmtp.com:2404
settings.wifizone.org:2404

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
REM20
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
jwthoir
keylog_path
%AppData%
mouse_option
false
mutex
REM20-HT0OGO
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
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 3 IoCs

pid	Process
1528	appert8u5e5e7yhg45e.exe
2468	appert8u5e5e7yhg45e.exe
1916	appert8u5e5e7yhg45e.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2737914667-933161113-3798636211-1000\Software\Microsoft\Windows\CurrentVersion\Run\Applicationtinjtbertsnrimrjtbrdyth = "C:\\Users\\Admin\\AppData\\Roaming\\appert8u5e5e7yhg45e.exe -boot"	appert8u5e5e7yhg45e.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1528 set thread context of 1916	1528	appert8u5e5e7yhg45e.exe	34

Drops file in Windows directory 2 IoCs

description	ioc	Process
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\security.config.cch.new	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe
File created	C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch.new	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2236	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe
1528	appert8u5e5e7yhg45e.exe
2468	appert8u5e5e7yhg45e.exe
1528	appert8u5e5e7yhg45e.exe
1528	appert8u5e5e7yhg45e.exe
1528	appert8u5e5e7yhg45e.exe
1528	appert8u5e5e7yhg45e.exe
1528	appert8u5e5e7yhg45e.exe
1528	appert8u5e5e7yhg45e.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2236	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe
Token: SeDebugPrivilege	1528	appert8u5e5e7yhg45e.exe
Token: SeDebugPrivilege	2468	appert8u5e5e7yhg45e.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1916	appert8u5e5e7yhg45e.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2236 wrote to memory of 2188	2236	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe	30
PID 2236 wrote to memory of 2188	2236	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe	30
PID 2236 wrote to memory of 2188	2236	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe	30
PID 2236 wrote to memory of 2188	2236	5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe	30
PID 2216 wrote to memory of 1528	2216	explorer.exe	32
PID 2216 wrote to memory of 1528	2216	explorer.exe	32
PID 2216 wrote to memory of 1528	2216	explorer.exe	32
PID 2216 wrote to memory of 1528	2216	explorer.exe	32
PID 1528 wrote to memory of 2468	1528	appert8u5e5e7yhg45e.exe	33
PID 1528 wrote to memory of 2468	1528	appert8u5e5e7yhg45e.exe	33
PID 1528 wrote to memory of 2468	1528	appert8u5e5e7yhg45e.exe	33
PID 1528 wrote to memory of 2468	1528	appert8u5e5e7yhg45e.exe	33
PID 1528 wrote to memory of 1916	1528	appert8u5e5e7yhg45e.exe	34
PID 1528 wrote to memory of 1916	1528	appert8u5e5e7yhg45e.exe	34
PID 1528 wrote to memory of 1916	1528	appert8u5e5e7yhg45e.exe	34
PID 1528 wrote to memory of 1916	1528	appert8u5e5e7yhg45e.exe	34
PID 1528 wrote to memory of 1916	1528	appert8u5e5e7yhg45e.exe	34
PID 1528 wrote to memory of 1916	1528	appert8u5e5e7yhg45e.exe	34
PID 1528 wrote to memory of 1916	1528	appert8u5e5e7yhg45e.exe	34
PID 1528 wrote to memory of 1916	1528	appert8u5e5e7yhg45e.exe	34
PID 1528 wrote to memory of 1916	1528	appert8u5e5e7yhg45e.exe	34
PID 1528 wrote to memory of 1916	1528	appert8u5e5e7yhg45e.exe	34

C:\Users\Admin\AppData\Local\Temp\5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\5ab7ab87a1164876f8515a82ec11a51d_JaffaCakes118.exe"
1⤵
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2236
- C:\Windows\SysWOW64\explorer.exe
  "C:\Windows\System32\explorer.exe" /c select, C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe
  2⤵
  PID:2188

C:\Windows\explorer.exe
C:\Windows\explorer.exe /factory,{75dff2b7-6936-4c06-a8bb-676a7b00b24b} -Embedding
1⤵
- Suspicious use of WriteProcessMemory
PID:2216
- C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe
  "C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe"
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1528
- - C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe
    "C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2468
- - C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe
    "C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetWindowsHookEx
    PID:1916

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

appert8u5e5e7yhg45e.exe

Path C:\Users\Admin\AppData\Roaming\appert8u5e5e7yhg45e.exe
Size 299KB
SHA256 bca0f84530687df0192d79ce7bc1f1359c5ffccbbba864006d525697a964bfca
MD5 5ab7ab87a1164876f8515a82ec11a51d
SHA1 4268a9c421a1c37695acc67435334269ac8622ec
SHA512 686348f82ecac03181776e153c9f8b6219ce3e5e057f1e6ba42182e0fa075832f5284a36a05d5e90a96dfef7fd8b6f7b905d69ce97d68a6e8553fbb2bc55a8b8
SSDEEP 6144:yYyF0obZta3EvmYd86ouD8XDoqHBnnvlvHZIjRFq0WLaL:y5F0ofoe86ow8XDo2BnnvpHY8a
MD5 SHA1 SHA512 SSDEEP

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enterprisesec.config.cch

Path C:\Windows\Microsoft.NET\Framework\v2.0.50727\config\enterprisesec.config.cch
Size 478B
SHA256 16672dca18dce9f63b769332d8e00d3adc4c12993852089d41d28e0c5c7d4018
MD5 1df068aad0bc9ecfccea3c9623c08328
SHA1 701a011c59d5ac1efd342d1b8016b77572ca44f0
SHA512 4f715c700e140b75726d65898a666eac9671675066b0673621756ae1f81308f453131d7104b6773b35b0d887a71bf1ce1269fc907ae94af2fe3e7da6cfcffc6d
MD5 SHA1 SHA512

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memory/1916-16-0x0000000000400000-0x000000000041C000-memory.dmp

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memory/1916-18-0x0000000000400000-0x000000000041C000-memory.dmp

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memory/1916-19-0x0000000000400000-0x000000000041C000-memory.dmp

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memory/2236-0-0x00000000748D1000-0x00000000748D2000-memory.dmp

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memory/2236-1-0x00000000748D0000-0x0000000074E7B000-memory.dmp

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memory/2236-2-0x00000000748D0000-0x0000000074E7B000-memory.dmp

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memory/2236-3-0x00000000748D0000-0x0000000074E7B000-memory.dmp

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memory/2236-4-0x00000000748D0000-0x0000000074E7B000-memory.dmp

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memory/2236-10-0x00000000748D0000-0x0000000074E7B000-memory.dmp

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