remcos | 96b2da5b493ac29bb08e8045157cd8b2643dcfa4a937f7eced5a276b8f8a6b67

Analysis

max time kernel
152s
max time network
176s
platform
windows10-2004_x64
resource
win10v2004-20220414-en
submitted
16/05/2022, 22:27

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General

Target
vbc.exe
Size 539KB
Sample220516-2c27maehal
SHA256 96b2da5b493ac29bb08e8045157cd8b2643dcfa4a937f7eced5a276b8f8a6b67
MD5 bf3dcbe1e67a122f82c0d0adb6ab2c3e
SHA1 c4c6b38c6321ba0e4490d2cd843748f732edf900
SHA512 36f6b08712433e2bd1c905756e592eeece8313c4ff9698fba6b319ea936d7f5b4fd413cf921828c94fe9ae68e2733e734c9d5e06c6fc6e5cef479844a5a228f7
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
3264	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-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	vbc.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	WScript.exe

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\Run\	vbc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Re = "\"C:\\Users\\Admin\\AppData\\Roaming\\ios.exe\""	vbc.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\Run\	ios.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Re = "\"C:\\Users\\Admin\\AppData\\Roaming\\ios.exe\""	ios.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 33 IoCs

pid	pid_target	Process	procid_target
5096	2304	WerFault.exe	80
2764	2304	WerFault.exe	80
4964	2304	WerFault.exe	80
4624	2304	WerFault.exe	80
4596	2304	WerFault.exe	80
4556	2304	WerFault.exe	80
2136	2304	WerFault.exe	80
980	2304	WerFault.exe	80
1368	2304	WerFault.exe	80
228	3264	WerFault.exe	104
4080	3264	WerFault.exe	104
3408	3264	WerFault.exe	104
4872	3264	WerFault.exe	104
1676	3264	WerFault.exe	104
2040	3264	WerFault.exe	104
1336	3264	WerFault.exe	104
3952	3264	WerFault.exe	104
3964	3264	WerFault.exe	104
3944	3264	WerFault.exe	104
428	3264	WerFault.exe	104
2948	3264	WerFault.exe	104
4152	3264	WerFault.exe	104
4388	3264	WerFault.exe	104
1796	3264	WerFault.exe	104
744	3264	WerFault.exe	104
1980	3264	WerFault.exe	104
4292	3264	WerFault.exe	104
2872	3264	WerFault.exe	104
5092	3264	WerFault.exe	104
4536	3264	WerFault.exe	104
4596	3264	WerFault.exe	104
1556	3264	WerFault.exe	104
3696	3264	WerFault.exe	104

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000_Classes\Local Settings	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3264	ios.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2304 wrote to memory of 1552	2304	vbc.exe	97
PID 2304 wrote to memory of 1552	2304	vbc.exe	97
PID 2304 wrote to memory of 1552	2304	vbc.exe	97
PID 1552 wrote to memory of 4344	1552	WScript.exe	102
PID 1552 wrote to memory of 4344	1552	WScript.exe	102
PID 1552 wrote to memory of 4344	1552	WScript.exe	102
PID 4344 wrote to memory of 3264	4344	cmd.exe	104
PID 4344 wrote to memory of 3264	4344	cmd.exe	104
PID 4344 wrote to memory of 3264	4344	cmd.exe	104

C:\Users\Admin\AppData\Local\Temp\vbc.exe
"C:\Users\Admin\AppData\Local\Temp\vbc.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2304
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2304 -s 684
  2⤵
  - Program crash
  PID:5096
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2304 -s 972
  2⤵
  - Program crash
  PID:2764
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2304 -s 976
  2⤵
  - Program crash
  PID:4964
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2304 -s 1140
  2⤵
  - Program crash
  PID:4624
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2304 -s 1012
  2⤵
  - Program crash
  PID:4596
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2304 -s 1204
  2⤵
  - Program crash
  PID:4556
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2304 -s 1172
  2⤵
  - Program crash
  PID:2136
- 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:1552
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\ios.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4344
  - - 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:3264
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 596
        5⤵
        Program crash
        
        PID:228
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 672
        5⤵
        Program crash
        
        PID:4080
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 672
        5⤵
        Program crash
        
        PID:3408
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 604
        5⤵
        Program crash
        
        PID:4872
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 684
        5⤵
        Program crash
        
        PID:1676
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 652
        5⤵
        Program crash
        
        PID:2040
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 844
        5⤵
        Program crash
        
        PID:1336
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 652
        5⤵
        Program crash
        
        PID:3952
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 832
        5⤵
        Program crash
        
        PID:3964
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 892
        5⤵
        Program crash
        
        PID:3944
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 652
        5⤵
        Program crash
        
        PID:428
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 1032
        5⤵
        Program crash
        
        PID:2948
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 1072
        5⤵
        Program crash
        
        PID:4152
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 1032
        5⤵
        Program crash
        
        PID:4388
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 1128
        5⤵
        Program crash
        
        PID:1796
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 1168
        5⤵
        Program crash
        
        PID:744
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 1256
        5⤵
        Program crash
        
        PID:1980
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 1384
        5⤵
        Program crash
        
        PID:4292
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 704
        5⤵
        Program crash
        
        PID:2872
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 848
        5⤵
        Program crash
        
        PID:5092
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 864
        5⤵
        Program crash
        
        PID:4536
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 1240
        5⤵
        Program crash
        
        PID:4596
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 1172
        5⤵
        Program crash
        
        PID:1556
    - - C:\Windows\SysWOW64\WerFault.exe
        
        C:\Windows\SysWOW64\WerFault.exe -u -p 3264 -s 700
        5⤵
        Program crash
        
        PID:3696
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2304 -s 676
  2⤵
  - Program crash
  PID:980
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 2304 -s 1192
  2⤵
  - Program crash
  PID:1368

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 2304 -ip 2304
1⤵
PID:1392

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 2304 -ip 2304
1⤵
PID:4428

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 2304 -ip 2304
1⤵
PID:4128

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 2304 -ip 2304
1⤵
PID:4456

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 2304 -ip 2304
1⤵
PID:4976

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 2304 -ip 2304
1⤵
PID:3464

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 2304 -ip 2304
1⤵
PID:2896

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 2304 -ip 2304
1⤵
PID:540

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 2304 -ip 2304
1⤵
PID:1532

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 3264 -ip 3264
1⤵
PID:308

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3264 -ip 3264
1⤵
PID:4336

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 3264 -ip 3264
1⤵
PID:3324

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 3264 -ip 3264
1⤵
PID:1640

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 3264 -ip 3264
1⤵
PID:4024

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 3264 -ip 3264
1⤵
PID:1180

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 576 -p 3264 -ip 3264
1⤵
PID:2632

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 576 -p 3264 -ip 3264
1⤵
PID:2116

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 532 -p 3264 -ip 3264
1⤵
PID:2312

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 3264 -ip 3264
1⤵
PID:3340

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3264 -ip 3264
1⤵
PID:1876

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 3264 -ip 3264
1⤵
PID:364

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 576 -p 3264 -ip 3264
1⤵
PID:2700

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 3264 -ip 3264
1⤵
PID:4144

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 3264 -ip 3264
1⤵
PID:4004

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 3264 -ip 3264
1⤵
PID:1740

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 3264 -ip 3264
1⤵
PID:3004

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 580 -p 3264 -ip 3264
1⤵
PID:1100

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 384 -p 3264 -ip 3264
1⤵
PID:3412

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 564 -p 3264 -ip 3264
1⤵
PID:552

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 592 -p 3264 -ip 3264
1⤵
PID:4524

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 3264 -ip 3264
1⤵
PID:4588

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 548 -p 3264 -ip 3264
1⤵
PID:564

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 3264 -ip 3264
1⤵
PID:1532

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

T1064

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Scripting

T1064

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 539KB
SHA256 96b2da5b493ac29bb08e8045157cd8b2643dcfa4a937f7eced5a276b8f8a6b67
MD5 bf3dcbe1e67a122f82c0d0adb6ab2c3e
SHA1 c4c6b38c6321ba0e4490d2cd843748f732edf900
SHA512 36f6b08712433e2bd1c905756e592eeece8313c4ff9698fba6b319ea936d7f5b4fd413cf921828c94fe9ae68e2733e734c9d5e06c6fc6e5cef479844a5a228f7
SSDEEP 12288:ceAllyB6NFuJ+yu/GfPYnuuA1uTHHnz5N9:ceAQOuwlOPYXD9
MD5 SHA1 SHA512 SSDEEP

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ios.exe

Path C:\Users\Admin\AppData\Roaming\ios.exe
Size 539KB
SHA256 96b2da5b493ac29bb08e8045157cd8b2643dcfa4a937f7eced5a276b8f8a6b67
MD5 bf3dcbe1e67a122f82c0d0adb6ab2c3e
SHA1 c4c6b38c6321ba0e4490d2cd843748f732edf900
SHA512 36f6b08712433e2bd1c905756e592eeece8313c4ff9698fba6b319ea936d7f5b4fd413cf921828c94fe9ae68e2733e734c9d5e06c6fc6e5cef479844a5a228f7
SSDEEP 12288:ceAllyB6NFuJ+yu/GfPYnuuA1uTHHnz5N9:ceAQOuwlOPYXD9
MD5 SHA1 SHA512 SSDEEP

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memory/2304-130-0x0000000002BFD000-0x0000000002C43000-memory.dmp

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memory/2304-131-0x0000000004910000-0x0000000004985000-memory.dmp

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memory/2304-132-0x0000000000400000-0x0000000002BA4000-memory.dmp

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memory/3264-139-0x0000000002D9E000-0x0000000002DE3000-memory.dmp

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memory/3264-140-0x0000000000400000-0x0000000002BA4000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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