remcos | 4ce1f830db2e5195e1b9242fef348c67527b4235d7afd3eebfab675b89597f3d

Resubmissions

30/09/2022, 13:05

220930-qbjhcadfa2 10

30/09/2022, 13:02

220930-p9w1nadeh9 10

Analysis

max time kernel
67s
max time network
67s
platform
windows10-2004_x64
resource
win10v2004-20220901-en
resource tags

arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
submitted
30/09/2022, 13:02

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General

Target

IMG-SCAN28202209.exe
Size

23KB
MD5

4ab9b88c610ff3fbe511aaf8f1c1294c
SHA1

b7c9e2df72ef925ff48cd6d4b125bc72e2dd12e5
SHA256

fcba45047433ffcc247b656b941e4fb517fb0a6582a01543a6e25bf774dfd11a
SHA512

e3aab0975fc27efb3783c70e7bdf347edd07edd531f3da8741ef3f61450305b7e6b983b4aac7fec49f5f459e6f69766e4bebc4e3840dc87d76258c00eac9e106
SSDEEP

384:73XELB28wj8veCinbQ4vlid7TEPVoyQLkopnW:kGjBDdvlid74PpQL9pW

Score

10^/10

remcos new persistence rat

Malware Config

Extracted

Family

remcos

Botnet

NEW

remcapi.duckdns.org:2028

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
FILE.EXE
copy_folder
work
delete_file
true
hide_file
false
hide_keylog_file
false
install_flag
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-L9LQMY
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
file
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Adds policy Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	IMG-SCAN28202209.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\file = "\"C:\\ProgramData\\work\\FILE.EXE\""	IMG-SCAN28202209.exe

Executes dropped EXE 1 IoCs

pid	Process
4904	FILE.EXE

Checks computer location settings 2 TTPs 4 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-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	IMG-SCAN28202209.exe
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	IMG-SCAN28202209.exe
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	FILE.EXE

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\APP = "\"C:\\Users\\Admin\\AppData\\Roaming\\APP.exe\""	IMG-SCAN28202209.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 5016 set thread context of 4144	5016	IMG-SCAN28202209.exe	102

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000_Classes\Local Settings	IMG-SCAN28202209.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4244	powershell.exe
4244	powershell.exe
4212	powershell.exe
4212	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	5016	IMG-SCAN28202209.exe
Token: SeDebugPrivilege	4244	powershell.exe
Token: SeDebugPrivilege	4904	FILE.EXE
Token: SeDebugPrivilege	4212	powershell.exe

Suspicious use of WriteProcessMemory 27 IoCs

description	pid	Process	procid_target
PID 5016 wrote to memory of 4244	5016	IMG-SCAN28202209.exe	89
PID 5016 wrote to memory of 4244	5016	IMG-SCAN28202209.exe	89
PID 5016 wrote to memory of 4244	5016	IMG-SCAN28202209.exe	89
PID 5016 wrote to memory of 4144	5016	IMG-SCAN28202209.exe	102
PID 5016 wrote to memory of 4144	5016	IMG-SCAN28202209.exe	102
PID 5016 wrote to memory of 4144	5016	IMG-SCAN28202209.exe	102
PID 5016 wrote to memory of 4144	5016	IMG-SCAN28202209.exe	102
PID 5016 wrote to memory of 4144	5016	IMG-SCAN28202209.exe	102
PID 5016 wrote to memory of 4144	5016	IMG-SCAN28202209.exe	102
PID 5016 wrote to memory of 4144	5016	IMG-SCAN28202209.exe	102
PID 5016 wrote to memory of 4144	5016	IMG-SCAN28202209.exe	102
PID 5016 wrote to memory of 4144	5016	IMG-SCAN28202209.exe	102
PID 5016 wrote to memory of 4144	5016	IMG-SCAN28202209.exe	102
PID 5016 wrote to memory of 4144	5016	IMG-SCAN28202209.exe	102
PID 5016 wrote to memory of 4144	5016	IMG-SCAN28202209.exe	102
PID 4144 wrote to memory of 3564	4144	IMG-SCAN28202209.exe	103
PID 4144 wrote to memory of 3564	4144	IMG-SCAN28202209.exe	103
PID 4144 wrote to memory of 3564	4144	IMG-SCAN28202209.exe	103
PID 3564 wrote to memory of 3576	3564	WScript.exe	104
PID 3564 wrote to memory of 3576	3564	WScript.exe	104
PID 3564 wrote to memory of 3576	3564	WScript.exe	104
PID 3576 wrote to memory of 4904	3576	cmd.exe	106
PID 3576 wrote to memory of 4904	3576	cmd.exe	106
PID 3576 wrote to memory of 4904	3576	cmd.exe	106
PID 4904 wrote to memory of 4212	4904	FILE.EXE	107
PID 4904 wrote to memory of 4212	4904	FILE.EXE	107
PID 4904 wrote to memory of 4212	4904	FILE.EXE	107

C:\Users\Admin\AppData\Local\Temp\IMG-SCAN28202209.exe
"C:\Users\Admin\AppData\Local\Temp\IMG-SCAN28202209.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5016
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4244
- C:\Users\Admin\AppData\Local\Temp\IMG-SCAN28202209.exe
  C:\Users\Admin\AppData\Local\Temp\IMG-SCAN28202209.exe
  2⤵
  - Adds policy Run key to start application
  - Checks computer location settings
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:4144
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:3564
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\work\FILE.EXE"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3576
    - - C:\ProgramData\work\FILE.EXE
        
        C:\ProgramData\work\FILE.EXE
        5⤵
        Executes dropped EXE
        Checks computer location settings
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:4904
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAANQAwAA==
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:4212

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:\ProgramData\work\FILE.EXE

Filesize
23KB

MD5
4ab9b88c610ff3fbe511aaf8f1c1294c

SHA1
b7c9e2df72ef925ff48cd6d4b125bc72e2dd12e5

SHA256
fcba45047433ffcc247b656b941e4fb517fb0a6582a01543a6e25bf774dfd11a

SHA512
e3aab0975fc27efb3783c70e7bdf347edd07edd531f3da8741ef3f61450305b7e6b983b4aac7fec49f5f459e6f69766e4bebc4e3840dc87d76258c00eac9e106

Download Submit
C:\ProgramData\work\FILE.EXE

Filesize
23KB

MD5
4ab9b88c610ff3fbe511aaf8f1c1294c

SHA1
b7c9e2df72ef925ff48cd6d4b125bc72e2dd12e5

SHA256
fcba45047433ffcc247b656b941e4fb517fb0a6582a01543a6e25bf774dfd11a

SHA512
e3aab0975fc27efb3783c70e7bdf347edd07edd531f3da8741ef3f61450305b7e6b983b4aac7fec49f5f459e6f69766e4bebc4e3840dc87d76258c00eac9e106

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
1KB

MD5
6195a91754effb4df74dbc72cdf4f7a6

SHA1
aba262f5726c6d77659fe0d3195e36a85046b427

SHA256
3254495a5513b37a2686a876d0040275414699e7ce760e7b5ee05e41a54b96f5

SHA512
ed723d15de267390dc93263538428e2c881be3494c996a810616b470d6df7d5acfcc8725687d5c50319ebef45caef44f769bfc32e0dc3abd249dacff4a12cc89

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

Filesize
53KB

MD5
06ad34f9739c5159b4d92d702545bd49

SHA1
9152a0d4f153f3f40f7e606be75f81b582ee0c17

SHA256
474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

SHA512
c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
16KB

MD5
c3f11ef5900baba5d05489731c759b2a

SHA1
744b2032ecea6051e28b941209a14473b8f670ea

SHA256
e44ff1fa3a6ff553638ec842a3402b36a80cbde943f49881b11a3308dcfc5971

SHA512
0a2b9c701ef924fe4e0aa9b14f821607262d91337cce98e8782192cae4a2bdcc2ef426ebf037ba88f6992122db7e7a48d68576ae3dfc0e88a3fa285e93d388d0

Download Submit
C:\Users\Admin\AppData\Local\Temp\install.vbs

Filesize
522B

MD5
bea79706ca85b348ac847100f6d55906

SHA1
6f49d9f95306def7f974cc92a78ee01226565c82

SHA256
dcc0f0a231657ac2e354b10791e7b7e848b82fce86170345628348d73642b4ea

SHA512
997bcb3a81f7029fb651f2ac50db7a849e47674a6a05c8ca72acbf6859cb7dd68f0cfe74d7f7691de2856f1f991e7d68dbd8c7cc2090d44521f56d8c6cfca0ee

Download Submit
memory/4144-147-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4144-143-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4144-144-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4144-145-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4244-138-0x0000000005E80000-0x0000000005EE6000-memory.dmp

Filesize
408KB

Download
memory/4244-141-0x0000000006990000-0x00000000069AA000-memory.dmp

Filesize
104KB

Download
memory/4244-140-0x0000000007B20000-0x000000000819A000-memory.dmp

Filesize
6.5MB

Download
memory/4244-139-0x00000000064B0000-0x00000000064CE000-memory.dmp

Filesize
120KB

Download
memory/4244-137-0x0000000005E10000-0x0000000005E76000-memory.dmp

Filesize
408KB

Download
memory/4244-136-0x0000000005770000-0x0000000005D98000-memory.dmp

Filesize
6.2MB

Download
memory/4244-135-0x0000000002EB0000-0x0000000002EE6000-memory.dmp

Filesize
216KB

Download
memory/5016-132-0x0000000000DA0000-0x0000000000DAC000-memory.dmp

Filesize
48KB

Download
memory/5016-133-0x00000000062B0000-0x00000000062D2000-memory.dmp

Filesize
136KB

Download