remcos | 8f5fae18ffc61f2ecf76d797ea904341337c3bc7385fbe8e505cebd1ac813b90

Analysis

max time kernel
155s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
20/05/2022, 06:07

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General

Target
2033987c1b1a62b5c6e4fe2ffe1960b6.exe
Size 492KB
Sample220520-gva6msdda2
SHA256 8f5fae18ffc61f2ecf76d797ea904341337c3bc7385fbe8e505cebd1ac813b90
MD5 2033987c1b1a62b5c6e4fe2ffe1960b6
SHA1 b798f1fb55df9d7373f1afa55032dbe9d513b7a2
SHA512 6c124237a257ed652436462728689f6722775401e2e467e7f46d20e0538fb7656374b51c03f79179ec51d0e7bfaa9b0a542297a4b80c7ee997e639cbcbbefd06
MD5 SHA1 SHA512

Score

10^/10

remcos remotehost persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

skygroupt6.zapto.org:2080

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
ios.exe
copy_folder
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
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-FL7CBT
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Re
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title

Signatures

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

Executes dropped EXE 1 IoCs

pid	Process
3276	ios.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	2033987c1b1a62b5c6e4fe2ffe1960b6.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Control Panel\International\Geo\Nation	WScript.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Re = "\"C:\\Users\\Admin\\AppData\\Roaming\\ios.exe\""	2033987c1b1a62b5c6e4fe2ffe1960b6.exe
Key created	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Windows\CurrentVersion\Run\	ios.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Re = "\"C:\\Users\\Admin\\AppData\\Roaming\\ios.exe\""	ios.exe
Key created	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000\Software\Microsoft\Windows\CurrentVersion\Run\	2033987c1b1a62b5c6e4fe2ffe1960b6.exe

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

System Information Discovery
T1082

Program crash 31 IoCs

pid	pid_target	Process	procid_target
4876	2324	WerFault.exe	78
1364	2324	WerFault.exe	78
4624	2324	WerFault.exe	78
1744	2324	WerFault.exe	78
4320	2324	WerFault.exe	78
1696	2324	WerFault.exe	78
2464	2324	WerFault.exe	78
4300	2324	WerFault.exe	78
2188	3276	WerFault.exe	107
2812	3276	WerFault.exe	107
4852	3276	WerFault.exe	107
4796	3276	WerFault.exe	107
428	3276	WerFault.exe	107
4256	3276	WerFault.exe	107
1168	3276	WerFault.exe	107
1484	3276	WerFault.exe	107
1936	3276	WerFault.exe	107
1824	3276	WerFault.exe	107
4988	3276	WerFault.exe	107
3000	3276	WerFault.exe	107
3456	3276	WerFault.exe	107
3784	3276	WerFault.exe	107
4744	3276	WerFault.exe	107
1988	3276	WerFault.exe	107
1120	3276	WerFault.exe	107
4276	3276	WerFault.exe	107
2856	3276	WerFault.exe	107
4260	3276	WerFault.exe	107
880	3276	WerFault.exe	107
2444	3276	WerFault.exe	107
2228	3276	WerFault.exe	107

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1081944012-3634099177-1681222835-1000_Classes\Local Settings	2033987c1b1a62b5c6e4fe2ffe1960b6.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3276	ios.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2324 wrote to memory of 4680	2324	2033987c1b1a62b5c6e4fe2ffe1960b6.exe	100
PID 2324 wrote to memory of 4680	2324	2033987c1b1a62b5c6e4fe2ffe1960b6.exe	100
PID 2324 wrote to memory of 4680	2324	2033987c1b1a62b5c6e4fe2ffe1960b6.exe	100
PID 4680 wrote to memory of 3452	4680	WScript.exe	105
PID 4680 wrote to memory of 3452	4680	WScript.exe	105
PID 4680 wrote to memory of 3452	4680	WScript.exe	105
PID 3452 wrote to memory of 3276	3452	cmd.exe	107
PID 3452 wrote to memory of 3276	3452	cmd.exe	107
PID 3452 wrote to memory of 3276	3452	cmd.exe	107

C:\Users\Admin\AppData\Local\Temp\2033987c1b1a62b5c6e4fe2ffe1960b6.exe
"C:\Users\Admin\AppData\Local\Temp\2033987c1b1a62b5c6e4fe2ffe1960b6.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2324
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 680
  2⤵
  - Program crash
  PID:4876
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 960
  2⤵
  - Program crash
  PID:1364
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 960
  2⤵
  - Program crash
  PID:4624
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 1036
  2⤵
  - Program crash
  PID:1744
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 1108
  2⤵
  - Program crash
  PID:4320
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 1112
  2⤵
  - Program crash
  PID:1696
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 1156
  2⤵
  - Program crash
  PID:2464
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:4680
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\ios.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3452
  - - C:\Users\Admin\AppData\Roaming\ios.exe
      C:\Users\Admin\AppData\Roaming\ios.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:3276
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 556
        5⤵
        Program crash
        
        PID:2188
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 572
        5⤵
        Program crash
        
        PID:2812
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 656
        5⤵
        Program crash
        
        PID:4852
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 696
        5⤵
        Program crash
        
        PID:4796
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 772
        5⤵
        Program crash
        
        PID:428
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 820
        5⤵
        Program crash
        
        PID:4256
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 844
        5⤵
        Program crash
        
        PID:1168
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 856
        5⤵
        Program crash
        
        PID:1484
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 860
        5⤵
        Program crash
        
        PID:1936
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 820
        5⤵
        Program crash
        
        PID:1824
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 940
        5⤵
        Program crash
        
        PID:4988
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 1028
        5⤵
        Program crash
        
        PID:3000
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 1064
        5⤵
        Program crash
        
        PID:3456
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 1072
        5⤵
        Program crash
        
        PID:3784
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 1140
        5⤵
        Program crash
        
        PID:4744
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 1344
        5⤵
        Program crash
        
        PID:1988
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 872
        5⤵
        Program crash
        
        PID:1120
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 992
        5⤵
        Program crash
        
        PID:4276
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 1440
        5⤵
        Program crash
        
        PID:2856
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 1452
        5⤵
        Program crash
        
        PID:4260
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 1484
        5⤵
        Program crash
        
        PID:880
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 1492
        5⤵
        Program crash
        
        PID:2444
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3276 -s 1500
        5⤵
        Program crash
        
        PID:2228
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2324 -s 1200
  2⤵
  - Program crash
  PID:4300

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 188 -p 2324 -ip 2324
1⤵
PID:1812

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 2324 -ip 2324
1⤵
PID:1076

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 176 -p 2324 -ip 2324
1⤵
PID:1476

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 2324 -ip 2324
1⤵
PID:4468

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 2324 -ip 2324
1⤵
PID:2444

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 488 -p 2324 -ip 2324
1⤵
PID:3400

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 2324 -ip 2324
1⤵
PID:3704

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 600 -p 2324 -ip 2324
1⤵
PID:840

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 572 -p 3276 -ip 3276
1⤵
PID:2252

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 584 -p 3276 -ip 3276
1⤵
PID:2588

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 584 -p 3276 -ip 3276
1⤵
PID:4984

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 612 -p 3276 -ip 3276
1⤵
PID:1884

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 632 -p 3276 -ip 3276
1⤵
PID:4736

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 604 -p 3276 -ip 3276
1⤵
PID:1308

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 656 -p 3276 -ip 3276
1⤵
PID:3768

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 668 -p 3276 -ip 3276
1⤵
PID:2732

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 672 -p 3276 -ip 3276
1⤵
PID:3384

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 656 -p 3276 -ip 3276
1⤵
PID:4340

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 652 -p 3276 -ip 3276
1⤵
PID:5112

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 672 -p 3276 -ip 3276
1⤵
PID:696

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 696 -p 3276 -ip 3276
1⤵
PID:3628

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 692 -p 3276 -ip 3276
1⤵
PID:1596

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 696 -p 3276 -ip 3276
1⤵
PID:3064

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 696 -p 3276 -ip 3276
1⤵
PID:1472

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 720 -p 3276 -ip 3276
1⤵
PID:1428

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 708 -p 3276 -ip 3276
1⤵
PID:2344

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 684 -p 3276 -ip 3276
1⤵
PID:3284

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 728 -p 3276 -ip 3276
1⤵
PID:4848

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 704 -p 3276 -ip 3276
1⤵
PID:1508

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 724 -p 3276 -ip 3276
1⤵
PID:1372

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 732 -p 3276 -ip 3276
1⤵
PID:2340

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

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Downloads

install.vbs

Path C:\Users\Admin\AppData\Local\Temp\install.vbs
Size 398B
SHA256 d90d18f6929159680ab3b424e1edf0e3a43f312f4291fc9f80fb78460d2e04f6
MD5 bba8d44c990bd0bb75d50716749cb6c0
SHA1 12ba25b7f6f7b6225fe5cd1ddcba07839a90cc00
SHA512 994701552561b7bf48cdb36ee1430e13a193c6283e3a7c00e096938f5efad58bb35dcc7607634973a9d42485c69ca8eaa68a7ff9093513be0b7d6c3afd942de2
MD5 SHA1 SHA512

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ios.exe

Path C:\Users\Admin\AppData\Roaming\ios.exe
Size 492KB
SHA256 8f5fae18ffc61f2ecf76d797ea904341337c3bc7385fbe8e505cebd1ac813b90
MD5 2033987c1b1a62b5c6e4fe2ffe1960b6
SHA1 b798f1fb55df9d7373f1afa55032dbe9d513b7a2
SHA512 6c124237a257ed652436462728689f6722775401e2e467e7f46d20e0538fb7656374b51c03f79179ec51d0e7bfaa9b0a542297a4b80c7ee997e639cbcbbefd06
SSDEEP 12288:UWz2OiRwt/ONdw7p0gk56xbMhsMX1KeVPM7L5V:FaReZOT26h56xbMhNlKeWf
MD5 SHA1 SHA512 SSDEEP

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ios.exe

Path C:\Users\Admin\AppData\Roaming\ios.exe
Size 492KB
SHA256 8f5fae18ffc61f2ecf76d797ea904341337c3bc7385fbe8e505cebd1ac813b90
MD5 2033987c1b1a62b5c6e4fe2ffe1960b6
SHA1 b798f1fb55df9d7373f1afa55032dbe9d513b7a2
SHA512 6c124237a257ed652436462728689f6722775401e2e467e7f46d20e0538fb7656374b51c03f79179ec51d0e7bfaa9b0a542297a4b80c7ee997e639cbcbbefd06
SSDEEP 12288:UWz2OiRwt/ONdw7p0gk56xbMhsMX1KeVPM7L5V:FaReZOT26h56xbMhNlKeWf
MD5 SHA1 SHA512 SSDEEP

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memory/2324-130-0x0000000000532000-0x0000000000577000-memory.dmp

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memory/2324-131-0x0000000002230000-0x00000000022A5000-memory.dmp

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memory/2324-132-0x0000000000400000-0x00000000004BC000-memory.dmp

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memory/3276-139-0x0000000000673000-0x00000000006B9000-memory.dmp

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memory/3276-140-0x0000000000760000-0x00000000007D5000-memory.dmp

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memory/3276-141-0x0000000000400000-0x00000000004BC000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads