remcos | f8c1e632a1ad12cd10d48e67b7ec7d58b133a1e624ac39f77fe7b121562c8acc

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
26/05/2023, 13:02

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General

Target

RFQ - URGENT REQUEST.exe
Size

1.0MB
MD5

5203b7b950622cd099fd40468a8ce9e8
SHA1

f1f40707fd40bc961cd684ebd5274b47fa7d82b7
SHA256

fa25a9987997b5bb2ee76905f6d6a3c5583b6751edd5e720640d712b2b094205
SHA512

5c9f2b03815989a0722b305c5b660a577089d4aca26376dd38ddadacd5a8803ddced39439a6154e398837f989321a87c20df91452e328733a4a1543a8bebc075
SSDEEP

12288:5QLzsiTB2QwWL7vPpLlvRolNoyHTXijBvqHrS+0P82jQeDi2aWpxy7BZrX92gsla:OLzxxnPpLlGNlTXiYrS+0P8m958vg+

Score

10^/10

remcos sirmo persistence rat

Malware Config

Extracted

Family

remcos

Botnet

SirMo

servermolink.ddns.net:9019

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
bin.exe
copy_folder
bin
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-ENJ179
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Checks computer location settings 2 TTPs 3 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-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	RFQ - URGENT REQUEST.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	RFQ - URGENT REQUEST.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Control Panel\International\Geo\Nation	bin.exe

Executes dropped EXE 2 IoCs

pid	Process
3764	bin.exe
4720	bin.exe

Adds Run key to start application 2 TTPs 8 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-ENJ179 = "\"C:\\Users\\Admin\\AppData\\Roaming\\bin\\bin.exe\""	bin.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows\CurrentVersion\Run\	RFQ - URGENT REQUEST.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-ENJ179 = "\"C:\\Users\\Admin\\AppData\\Roaming\\bin\\bin.exe\""	RFQ - URGENT REQUEST.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	RFQ - URGENT REQUEST.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-ENJ179 = "\"C:\\Users\\Admin\\AppData\\Roaming\\bin\\bin.exe\""	RFQ - URGENT REQUEST.exe
Key created	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\Software\Microsoft\Windows\CurrentVersion\Run\	bin.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2275444769-3691835758-4097679484-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-ENJ179 = "\"C:\\Users\\Admin\\AppData\\Roaming\\bin\\bin.exe\""	bin.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\	bin.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 4132 set thread context of 2000	4132	RFQ - URGENT REQUEST.exe	91
PID 3764 set thread context of 4720	3764	bin.exe	101

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 2 IoCs

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

persistence

Scheduled Task

T1053

pid	Process
4148	schtasks.exe
692	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4132	RFQ - URGENT REQUEST.exe
4132	RFQ - URGENT REQUEST.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4132	RFQ - URGENT REQUEST.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4720	bin.exe

Suspicious use of WriteProcessMemory 36 IoCs

description	pid	Process	procid_target
PID 4132 wrote to memory of 692	4132	RFQ - URGENT REQUEST.exe	88
PID 4132 wrote to memory of 692	4132	RFQ - URGENT REQUEST.exe	88
PID 4132 wrote to memory of 692	4132	RFQ - URGENT REQUEST.exe	88
PID 4132 wrote to memory of 1392	4132	RFQ - URGENT REQUEST.exe	90
PID 4132 wrote to memory of 1392	4132	RFQ - URGENT REQUEST.exe	90
PID 4132 wrote to memory of 1392	4132	RFQ - URGENT REQUEST.exe	90
PID 4132 wrote to memory of 2000	4132	RFQ - URGENT REQUEST.exe	91
PID 4132 wrote to memory of 2000	4132	RFQ - URGENT REQUEST.exe	91
PID 4132 wrote to memory of 2000	4132	RFQ - URGENT REQUEST.exe	91
PID 4132 wrote to memory of 2000	4132	RFQ - URGENT REQUEST.exe	91
PID 4132 wrote to memory of 2000	4132	RFQ - URGENT REQUEST.exe	91
PID 4132 wrote to memory of 2000	4132	RFQ - URGENT REQUEST.exe	91
PID 4132 wrote to memory of 2000	4132	RFQ - URGENT REQUEST.exe	91
PID 4132 wrote to memory of 2000	4132	RFQ - URGENT REQUEST.exe	91
PID 4132 wrote to memory of 2000	4132	RFQ - URGENT REQUEST.exe	91
PID 4132 wrote to memory of 2000	4132	RFQ - URGENT REQUEST.exe	91
PID 4132 wrote to memory of 2000	4132	RFQ - URGENT REQUEST.exe	91
PID 4132 wrote to memory of 2000	4132	RFQ - URGENT REQUEST.exe	91
PID 2000 wrote to memory of 3764	2000	RFQ - URGENT REQUEST.exe	92
PID 2000 wrote to memory of 3764	2000	RFQ - URGENT REQUEST.exe	92
PID 2000 wrote to memory of 3764	2000	RFQ - URGENT REQUEST.exe	92
PID 3764 wrote to memory of 4148	3764	bin.exe	99
PID 3764 wrote to memory of 4148	3764	bin.exe	99
PID 3764 wrote to memory of 4148	3764	bin.exe	99
PID 3764 wrote to memory of 4720	3764	bin.exe	101
PID 3764 wrote to memory of 4720	3764	bin.exe	101
PID 3764 wrote to memory of 4720	3764	bin.exe	101
PID 3764 wrote to memory of 4720	3764	bin.exe	101
PID 3764 wrote to memory of 4720	3764	bin.exe	101
PID 3764 wrote to memory of 4720	3764	bin.exe	101
PID 3764 wrote to memory of 4720	3764	bin.exe	101
PID 3764 wrote to memory of 4720	3764	bin.exe	101
PID 3764 wrote to memory of 4720	3764	bin.exe	101
PID 3764 wrote to memory of 4720	3764	bin.exe	101
PID 3764 wrote to memory of 4720	3764	bin.exe	101
PID 3764 wrote to memory of 4720	3764	bin.exe	101

C:\Users\Admin\AppData\Local\Temp\RFQ - URGENT REQUEST.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ - URGENT REQUEST.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4132
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NkYGlXHqRqkS" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE091.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:692
- C:\Users\Admin\AppData\Local\Temp\RFQ - URGENT REQUEST.exe
  "{path}"
  2⤵
  PID:1392
- C:\Users\Admin\AppData\Local\Temp\RFQ - URGENT REQUEST.exe
  "{path}"
  2⤵
  - Checks computer location settings
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:2000
- - C:\Users\Admin\AppData\Roaming\bin\bin.exe
    "C:\Users\Admin\AppData\Roaming\bin\bin.exe"
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:3764
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NkYGlXHqRqkS" /XML "C:\Users\Admin\AppData\Local\Temp\tmp51E9.tmp"
      4⤵
      Creates scheduled task(s)
      PID:4148
  - - C:\Users\Admin\AppData\Roaming\bin\bin.exe
      "{path}"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:4720

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Registry Run Keys / Startup Folder

T1060

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

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\remcos\logs.dat

Filesize
144B

MD5
eb04a8e0ae33515e8ac0b585de3eb3b8

SHA1
3dbd60e7dd47519fd0da43908040c0a4fd06f5dd

SHA256
803c6e65655ff856a17df86835dc5601c47da23ad1f6a698a95c20afdb545a03

SHA512
10a2e9f9653585b54055d6f1fa94cc6288cfdf579729cc460c690b8459aac648613a8d49d49d20ab0db504fbbf1492857a18b1e8dba25e7adf70d2cdd705d5d8

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp51E9.tmp

Filesize
1KB

MD5
b1244e2a2f179fdb98524f65009f680f

SHA1
74d2a03d367238546aaa936dd23e8e35294e7b28

SHA256
5601a65dfe09032f5047c6fa44be3db6de283224b23f85e54582ffa6e42e5fb7

SHA512
28b2be62262cd8dfe325b6e0a87135af503298fd2e3d2f2a24764cde33241fc36d7db61c6dfee6e3f9ba85b32fd48feb9343675703ca472669e8fa3bb53a13e1

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpE091.tmp

Filesize
1KB

MD5
b1244e2a2f179fdb98524f65009f680f

SHA1
74d2a03d367238546aaa936dd23e8e35294e7b28

SHA256
5601a65dfe09032f5047c6fa44be3db6de283224b23f85e54582ffa6e42e5fb7

SHA512
28b2be62262cd8dfe325b6e0a87135af503298fd2e3d2f2a24764cde33241fc36d7db61c6dfee6e3f9ba85b32fd48feb9343675703ca472669e8fa3bb53a13e1

Download Submit
C:\Users\Admin\AppData\Roaming\bin\bin.exe

Filesize
1.0MB

MD5
5203b7b950622cd099fd40468a8ce9e8

SHA1
f1f40707fd40bc961cd684ebd5274b47fa7d82b7

SHA256
fa25a9987997b5bb2ee76905f6d6a3c5583b6751edd5e720640d712b2b094205

SHA512
5c9f2b03815989a0722b305c5b660a577089d4aca26376dd38ddadacd5a8803ddced39439a6154e398837f989321a87c20df91452e328733a4a1543a8bebc075

Download Submit
C:\Users\Admin\AppData\Roaming\bin\bin.exe

Filesize
1.0MB

MD5
5203b7b950622cd099fd40468a8ce9e8

SHA1
f1f40707fd40bc961cd684ebd5274b47fa7d82b7

SHA256
fa25a9987997b5bb2ee76905f6d6a3c5583b6751edd5e720640d712b2b094205

SHA512
5c9f2b03815989a0722b305c5b660a577089d4aca26376dd38ddadacd5a8803ddced39439a6154e398837f989321a87c20df91452e328733a4a1543a8bebc075

Download Submit
C:\Users\Admin\AppData\Roaming\bin\bin.exe

Filesize
1.0MB

MD5
5203b7b950622cd099fd40468a8ce9e8

SHA1
f1f40707fd40bc961cd684ebd5274b47fa7d82b7

SHA256
fa25a9987997b5bb2ee76905f6d6a3c5583b6751edd5e720640d712b2b094205

SHA512
5c9f2b03815989a0722b305c5b660a577089d4aca26376dd38ddadacd5a8803ddced39439a6154e398837f989321a87c20df91452e328733a4a1543a8bebc075

Download Submit
C:\Users\Admin\AppData\Roaming\bin\bin.exe

Filesize
1.0MB

MD5
5203b7b950622cd099fd40468a8ce9e8

SHA1
f1f40707fd40bc961cd684ebd5274b47fa7d82b7

SHA256
fa25a9987997b5bb2ee76905f6d6a3c5583b6751edd5e720640d712b2b094205

SHA512
5c9f2b03815989a0722b305c5b660a577089d4aca26376dd38ddadacd5a8803ddced39439a6154e398837f989321a87c20df91452e328733a4a1543a8bebc075

Download Submit
memory/2000-144-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2000-147-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2000-159-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/2000-146-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/3764-161-0x0000000005AA0000-0x0000000005AB0000-memory.dmp

Filesize
64KB

Download
memory/3764-160-0x0000000005AA0000-0x0000000005AB0000-memory.dmp

Filesize
64KB

Download
memory/4132-139-0x00000000050A0000-0x00000000050B0000-memory.dmp

Filesize
64KB

Download
memory/4132-138-0x0000000005440000-0x0000000005496000-memory.dmp

Filesize
344KB

Download
memory/4132-137-0x0000000005210000-0x000000000521A000-memory.dmp

Filesize
40KB

Download
memory/4132-133-0x00000000006B0000-0x00000000007C0000-memory.dmp

Filesize
1.1MB

Download
memory/4132-140-0x00000000050A0000-0x00000000050B0000-memory.dmp

Filesize
64KB

Download
memory/4132-136-0x00000000052B0000-0x0000000005342000-memory.dmp

Filesize
584KB

Download
memory/4132-135-0x00000000057C0000-0x0000000005D64000-memory.dmp

Filesize
5.6MB

Download
memory/4132-134-0x0000000005170000-0x000000000520C000-memory.dmp

Filesize
624KB

Download
memory/4720-169-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-176-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-171-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-172-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-173-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-174-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-175-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-168-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-182-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-185-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-186-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-167-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-193-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-194-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-201-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download
memory/4720-202-0x0000000000400000-0x0000000000481000-memory.dmp

Filesize
516KB

Download