remcos | 58cb07fecced83dfe6a4999921297ad94248f47935568913aa2a1a60de1d330a

General

Target

e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
Size

385KB
MD5

e8fcccc14df4c8fbde4223b16fdb4e63
SHA1

6bb4317b855e9f07c9f63b33455eeaa7335bfade
SHA256

58cb07fecced83dfe6a4999921297ad94248f47935568913aa2a1a60de1d330a
SHA512

8cb6aab343972ef7384c6e8e4d2418e168c35e448a4e1183d650776762c407239d265838fe1c03bd10cf4415238c4e7b08ed9a9d95a62f70bcc4f50561b01c1c
SSDEEP

3072:ZpXsDgp6KE5SNnxqFUKpMgcTPaAp3DLW11eJzf:ZpEmxqFUKigcTSApnW1i

Score

10^/10

remcos remotehost defense_evasion discovery rat

Malware Config

Extracted

Family

remcos

Version

2.0.5 Pro

Botnet

RemoteHost

C2

79.172.242.28:2404

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
false
install_flag
false
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-6PPTSU
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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 1 IoCs

pid	Process
1832	svhost.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3540 set thread context of 1832	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	87
PID 1832 set thread context of 428	1832	svhost.exe	88

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
File created	C:\Windows\assembly\Desktop.ini	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe

Subvert Trust Controls: Mark-of-the-Web Bypass 1 TTPs 1 IoCs

When files are downloaded from the Internet, they are tagged with a hidden NTFS Alternate Data Stream (ADS) named Zone.Identifier with a specific value known as the MOTW.

defense_evasion

SIP and Trust Provider Hijacking

T1553.003

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\Temp\8778\name.exe:Zone.Identifier	cmd.exe

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 5 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	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svhost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iexplore.exe

NTFS ADS 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Local\Temp\8778\name.exe:Zone.Identifier	cmd.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
Token: 33	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3540 wrote to memory of 1260	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	84
PID 3540 wrote to memory of 1260	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	84
PID 3540 wrote to memory of 1260	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	84
PID 1260 wrote to memory of 216	1260	cmd.exe	86
PID 1260 wrote to memory of 216	1260	cmd.exe	86
PID 1260 wrote to memory of 216	1260	cmd.exe	86
PID 3540 wrote to memory of 1832	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	87
PID 3540 wrote to memory of 1832	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	87
PID 3540 wrote to memory of 1832	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	87
PID 3540 wrote to memory of 1832	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	87
PID 3540 wrote to memory of 1832	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	87
PID 3540 wrote to memory of 1832	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	87
PID 3540 wrote to memory of 1832	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	87
PID 3540 wrote to memory of 1832	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	87
PID 3540 wrote to memory of 1832	3540	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	87
PID 1832 wrote to memory of 428	1832	svhost.exe	88
PID 1832 wrote to memory of 428	1832	svhost.exe	88
PID 1832 wrote to memory of 428	1832	svhost.exe	88
PID 1832 wrote to memory of 428	1832	svhost.exe	88
PID 1832 wrote to memory of 428	1832	svhost.exe	88
PID 1832 wrote to memory of 428	1832	svhost.exe	88
PID 1832 wrote to memory of 428	1832	svhost.exe	88
PID 1832 wrote to memory of 428	1832	svhost.exe	88
PID 1832 wrote to memory of 428	1832	svhost.exe	88

C:\Users\Admin\AppData\Local\Temp\e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe"
1⤵
- Drops desktop.ini file(s)
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3540
- C:\Windows\SysWOW64\cmd.exe
  "cmd.exe"
  2⤵
  - Subvert Trust Controls: Mark-of-the-Web Bypass
  - System Location Discovery: System Language Discovery
  - NTFS ADS
  - Suspicious use of WriteProcessMemory
  PID:1260
- - C:\Windows\SysWOW64\reg.exe
    reg add "HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows" /v Load /t REG_SZ /d "C:\Users\Admin\AppData\Local\Temp\8778\name.exe.lnk" /f
    3⤵
    - System Location Discovery: System Language Discovery
    PID:216
- C:\Users\Admin\AppData\Local\Temp\svhost.exe
  "C:\Users\Admin\AppData\Local\Temp\svhost.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1832
- - C:\Program Files (x86)\Internet Explorer\iexplore.exe
    "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:428

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Subvert Trust Controls

1

T1553

SIP and Trust Provider Hijacking

1

T1553.003

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\8778\name.exe

Filesize
385KB

MD5
e8fcccc14df4c8fbde4223b16fdb4e63

SHA1
6bb4317b855e9f07c9f63b33455eeaa7335bfade

SHA256
58cb07fecced83dfe6a4999921297ad94248f47935568913aa2a1a60de1d330a

SHA512
8cb6aab343972ef7384c6e8e4d2418e168c35e448a4e1183d650776762c407239d265838fe1c03bd10cf4415238c4e7b08ed9a9d95a62f70bcc4f50561b01c1c

Download Submit
C:\Users\Admin\AppData\Local\Temp\svhost.exe

Filesize
1.6MB

MD5
1c9ff7df71493896054a91bee0322ebf

SHA1
38f1c85965d58b910d8e8381b6b1099d5dfcbfe4

SHA256
e8b5da3394bbdd7868122ffd88d9d06afe31bd69d656857910d2f820c32d0efa

SHA512
aa0def62b663743e6c3c022182b35cff33cb9abf08453d5098f3c5d32b2a8b0cd1cc5de64b93e39680c1d1396fef1fd50b642ca3ea4ba1f6d1078321d96916ab

Download Submit
memory/428-19-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1832-12-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1832-16-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/1832-18-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/3540-0-0x0000000075552000-0x0000000075553000-memory.dmp

Filesize
4KB

Download
memory/3540-1-0x0000000075550000-0x0000000075B01000-memory.dmp

Filesize
5.7MB

Download
memory/3540-2-0x0000000075550000-0x0000000075B01000-memory.dmp

Filesize
5.7MB

Download
memory/3540-20-0x0000000075550000-0x0000000075B01000-memory.dmp

Filesize
5.7MB

Download

Analysis

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