remcos | d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221

Analysis

max time kernel
114s
max time network
118s
platform
windows7_x64
resource
win7-20240708-en
resource tags

arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
submitted
17/10/2024, 01:57

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General

Target
d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe
Size 2.0MB
Sample241017-cdarbswemd
SHA256 d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221
MD5 a3306a8ffe614d6c05c81226e66bd7e0
SHA1 8c9d52d17df3b2556d4b4f15a191851a15afe188
SHA512 80cbbfd7b1eb0ff09da0250a93576df301064eedad21e95074b3eb1ec0a6b968277bf93c300183844df1c873cd308e93090683261b6b443e8f0c2eb5e63cd128
SSDEEP 24576:gD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPj8/j7otSm/EVjlM:gp7E+QrFUBgq2pqM
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos host discovery persistence rat spyware stealer

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

213.183.58.19:4000

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
read.dat
keylog_flag
false
keylog_folder
CastC
keylog_path
%AppData%
mouse_option
false
mutex
remcos_sccafsoidz
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
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 2 IoCs

pid	Process
2756	sbietrcl.exe
668	sbietrcl.exe

Loads dropped DLL 1 IoCs

pid	Process
2160	d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe

Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

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-1-5-21-3551809350-4263495960-1443967649-1000\Software\Microsoft\Windows\CurrentVersion\Run\Application = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Windows\\Templates\\sbietrcl.exe"	d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2756 set thread context of 668	2756	sbietrcl.exe	31

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	d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	sbietrcl.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
2160	d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe
2160	d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe
2160	d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe
2160	d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe
2160	d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe
2160	d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe
2756	sbietrcl.exe
2756	sbietrcl.exe
2756	sbietrcl.exe
2756	sbietrcl.exe
2756	sbietrcl.exe
2756	sbietrcl.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2160	d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe
Token: SeDebugPrivilege	2756	sbietrcl.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
668	sbietrcl.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 2160 wrote to memory of 2756	2160	d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe	30
PID 2160 wrote to memory of 2756	2160	d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe	30
PID 2160 wrote to memory of 2756	2160	d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe	30
PID 2160 wrote to memory of 2756	2160	d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe	30
PID 2756 wrote to memory of 668	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 668	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 668	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 668	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 668	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 668	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 668	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 668	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 668	2756	sbietrcl.exe	31
PID 2756 wrote to memory of 668	2756	sbietrcl.exe	31

C:\Users\Admin\AppData\Local\Temp\d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe
"C:\Users\Admin\AppData\Local\Temp\d12fc581fb473cb6b22b253f4a26f3780063970442a18cd27a299c750ad6e221N.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2160
- C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
  "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2756
- - C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
    "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:668

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

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Size 342B
SHA256 bd7bce859242710142cce4fde5d2846c5b86af2081bf11a4cd02c95a5ea99e4c
MD5 ffc9886f8536fea68cc0c59db0d3b97c
SHA1 962f7158b63a8e925dd42f2549831db1ecbf0a2c
SHA512 e831f5a7c17503eeb92a7b12e4ad713aff69a4eb2a3acc9e1d5e547abed27dea3c6f41b5694934898def2677f3a99c0041d15ddc28d40b5167e35488ae65a983
MD5 SHA1 SHA512

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94308059B57B3142E455B38A6EB92015

Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
Size 342B
SHA256 ed9f8328fd9f2d5e874fb9970e35286a4bf89437e49536023923481a6e17cdae
MD5 e4b0dac00eda376e164a1ae14c99a223
SHA1 2ec1459369970a0df7ccfaf0f173f189fd62f77d
SHA512 fdb2d0c31427b3d7537d9b17c7d6d8451b9707e03f72ac7217e1996140f2c05fbccb1984baf29ed1adb0cbd5892a3e867fff58ec6d008bf921e1ebbb34105163
MD5 SHA1 SHA512

Submit Download

Cab6441.tmp

Path C:\Users\Admin\AppData\Local\Temp\Cab6441.tmp
Size 70KB
SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
MD5 49aebf8cbd62d92ac215b2923fb1b9f5
SHA1 1723be06719828dda65ad804298d0431f6aff976
SHA512 bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b
SSDEEP 1536:gc257bHnClJ3v5mnAQEBP+bfnW8Ctl8G1G4eu76NWDdB34w18R5cBWcJAm68+Q:gp2ld5jPqW8LgeulxB3fgcEfDQ
MD5 SHA1 SHA512 SSDEEP

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Tar6454.tmp

Path C:\Users\Admin\AppData\Local\Temp\Tar6454.tmp
Size 181KB
SHA256 8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8
MD5 4ea6026cf93ec6338144661bf1202cd1
SHA1 a1dec9044f750ad887935a01430bf49322fbdcb7
SHA512 6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b
SSDEEP 1536:aAZw/J+lCUsTRvsqgCyqWlUDNWdm1wpSru2A0XwjY/z02DTr3rmt6mZ:as2J+qTR0XCy/dmASru2AijbdG
MD5 SHA1 SHA512 SSDEEP

Submit Download

sbietrcl.exe

Path \Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe
Size 2.0MB
SHA256 edfc97e99f055a1565ba989b15c30dd6164db87c04ad32e7e53f04184b57d57c
MD5 969dcd586b7c751921727423627d7bbb
SHA1 5afb1cbe8ac11fc3d0fa7bb1cca58f70f4f13411
SHA512 f6b21a6290ba15d5c36d74dcde486585426db52f037e16e3ed6eece8c828651355989449551d5ab715eed6c6d970787857d5e82e67b086489299a3f18a917b48
SSDEEP 24576:AD39v74lfGQrFUspugRNJI2DJ53J/J/L5dJPj8/j7otSm/EVjleL:Ap7E+QrFUBgq2pqe
MD5 SHA1 SHA512 SSDEEP

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memory/668-216-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/668-211-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/668-221-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/668-220-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/668-217-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/668-205-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/668-207-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/668-209-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/668-203-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/668-214-0x0000000000400000-0x0000000000417000-memory.dmp

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memory/668-213-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

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memory/2160-191-0x00000000742D0000-0x000000007487B000-memory.dmp

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memory/2160-1-0x00000000742D0000-0x000000007487B000-memory.dmp

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memory/2160-0-0x00000000742D1000-0x00000000742D2000-memory.dmp

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memory/2160-171-0x00000000742D0000-0x000000007487B000-memory.dmp

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memory/2160-2-0x00000000742D0000-0x000000007487B000-memory.dmp

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memory/2160-184-0x00000000742D0000-0x000000007487B000-memory.dmp

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memory/2160-172-0x00000000742D0000-0x000000007487B000-memory.dmp

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memory/2756-192-0x00000000742D0000-0x000000007487B000-memory.dmp

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memory/2756-222-0x00000000742D0000-0x000000007487B000-memory.dmp

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