remcos | bd8bc9d2baa667a23666aed3914ed8b16cb14912b1f07a6db16e9d0b9a839919

General

Target

8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe
Size

975KB
MD5

8ce1dba19fb95b8e425ed55d36d58371
SHA1

a3657a870dc8fa7901e12be07a828be157f437be
SHA256

bd8bc9d2baa667a23666aed3914ed8b16cb14912b1f07a6db16e9d0b9a839919
SHA512

9680d2b457db261d28bf72ccc75333f93abc8ef311fbfc827d24ae2c61884bd285485753b033ec359418d37c85fd65c39ca4b5b2283e142a5e526311da8a5b33
SSDEEP

12288:ACdOy3vVrKxR5CXbNjAOxK/j2n+4YG/6c1mFFja3mXgcjfRlgsUBgav7nklWmeZc:ACdxte/80jYLT3U1jfsWajkSIjGQ

Score

10^/10

remcos remotehost discovery rat upx

Malware Config

Extracted

Family

remcos

Version

2.0.6 Pro

Botnet

RemoteHost

C2

162.241.190.159:1256

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-KLW8JP
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
Remcos family
remcos

Checks BIOS information in registry 2 TTPs 1 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1956 set thread context of 1988	1956	8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe	30

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral1/memory/1988-2-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral1/memory/1988-9-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral1/memory/1988-10-0x0000000000400000-0x0000000000422000-memory.dmp	upx
behavioral1/memory/1988-11-0x0000000000400000-0x0000000000422000-memory.dmp	upx

System Location Discovery: System Language Discovery 1 TTPs 2 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	8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS	8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemProductName	8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemManufacturer	8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1956	8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1956 wrote to memory of 1988	1956	8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe	30
PID 1956 wrote to memory of 1988	1956	8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe	30
PID 1956 wrote to memory of 1988	1956	8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe	30
PID 1956 wrote to memory of 1988	1956	8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe	30
PID 1956 wrote to memory of 1988	1956	8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe	30
PID 1956 wrote to memory of 1988	1956	8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe	30

C:\Users\Admin\AppData\Local\Temp\8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\8ce1dba19fb95b8e425ed55d36d58371_JaffaCakes118.exe"
1⤵
- Checks BIOS information in registry
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:1956
- C:\Windows\SysWOW64\svchost.exe
  "C:\Windows\System32\svchost.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:1988

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/1956-0-0x0000000000210000-0x0000000000211000-memory.dmp

Filesize
4KB

Download
memory/1988-1-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1988-6-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1988-2-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1988-9-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1988-10-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download
memory/1988-11-0x0000000000400000-0x0000000000422000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads