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

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
2320	svhost.exe

Loads dropped DLL 1 IoCs

pid	Process
2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2720 set thread context of 2320	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	33

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 3 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

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 4 IoCs

pid	Process
2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
Token: 33	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2720 wrote to memory of 2844	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	30
PID 2720 wrote to memory of 2844	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	30
PID 2720 wrote to memory of 2844	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	30
PID 2720 wrote to memory of 2844	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	30
PID 2844 wrote to memory of 2840	2844	cmd.exe	32
PID 2844 wrote to memory of 2840	2844	cmd.exe	32
PID 2844 wrote to memory of 2840	2844	cmd.exe	32
PID 2844 wrote to memory of 2840	2844	cmd.exe	32
PID 2720 wrote to memory of 2320	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	33
PID 2720 wrote to memory of 2320	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	33
PID 2720 wrote to memory of 2320	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	33
PID 2720 wrote to memory of 2320	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	33
PID 2720 wrote to memory of 2320	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	33
PID 2720 wrote to memory of 2320	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	33
PID 2720 wrote to memory of 2320	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	33
PID 2720 wrote to memory of 2320	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	33
PID 2720 wrote to memory of 2320	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	33
PID 2720 wrote to memory of 2320	2720	e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe	33

C:\Users\Admin\AppData\Local\Temp\e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e8fcccc14df4c8fbde4223b16fdb4e63_JaffaCakes118.exe"
1⤵
- Loads dropped DLL
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2720
- 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:2844
- - 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:2840
- C:\Users\Admin\AppData\Local\Temp\svhost.exe
  "C:\Users\Admin\AppData\Local\Temp\svhost.exe"
  2⤵
  - Executes dropped EXE
  PID:2320

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
32827e69b293b99013bbbe37d029245d

SHA1
bc9f80a38f09354d71467a05b0c5a82c3f7dac53

SHA256
9250b89157770e3ab59a2c7e2dd6b12b3c61d9b7c6620c3b4727e4bfff10f01f

SHA512
58c9a072e2bea0a8f22b4e69512abafad271ca91f2e3d2b4233796dd3d83021aad1c6da69fc8f7e7ca7919d34bde941cb8b5d185b668168866d1180558b93cf5

Download Submit
memory/2320-12-0x0000000000240000-0x000000000025B000-memory.dmp

Filesize
108KB

Download
memory/2320-25-0x0000000000240000-0x000000000025B000-memory.dmp

Filesize
108KB

Download
memory/2320-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2320-20-0x0000000000240000-0x000000000025B000-memory.dmp

Filesize
108KB

Download
memory/2320-17-0x0000000000240000-0x000000000025B000-memory.dmp

Filesize
108KB

Download
memory/2320-15-0x0000000000240000-0x000000000025B000-memory.dmp

Filesize
108KB

Download
memory/2320-13-0x0000000000240000-0x000000000025B000-memory.dmp

Filesize
108KB

Download
memory/2720-2-0x00000000747F0000-0x0000000074D9B000-memory.dmp

Filesize
5.7MB

Download
memory/2720-1-0x00000000747F0000-0x0000000074D9B000-memory.dmp

Filesize
5.7MB

Download
memory/2720-0-0x00000000747F1000-0x00000000747F2000-memory.dmp

Filesize
4KB

Download
memory/2720-28-0x00000000747F0000-0x0000000074D9B000-memory.dmp

Filesize
5.7MB

Download

Analysis

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