remcos | a8de492e684aca6122ef3ce804db20ea41ce492217b72af0015579e74e54ee8d

General

Target

e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe
Size

188KB
MD5

e65bf8ac5f28f737825c765a71aabffe
SHA1

de71812186d68661dccb73edb7f15e6e767e09ce
SHA256

a8de492e684aca6122ef3ce804db20ea41ce492217b72af0015579e74e54ee8d
SHA512

d70b755687daf03714437502b2c32d69159c36e99e7e6fbe26e78da27ee419d6d72da9add5ccae3bfbbfd1569bb59bfcc99351b881ddca9221a029a005bcec48
SSDEEP

3072:O1skpeh0a2cAptw77cKw694MwUDrEclsmCHRibSVNy3Dz7UlGNLcUz4rdmvqwdmQ:N+tel94K3AmWY4yzzGGNLpzEOddm5S

Score

10^/10

remcos remotehost discovery rat upx

Malware Config

Extracted

Family

remcos

Version

2.5.0 Light

Botnet

RemoteHost

C2

127.0.0.1:1234

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
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
XA-XVZV5T
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
take_screenshot_title
wikipedia;solitaire;

Signatures

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

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\stnm.lnk	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe

UPX packed file 10 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2728-16-0x0000000000400000-0x000000000041C000-memory.dmp	upx
behavioral1/memory/2728-12-0x0000000000400000-0x000000000041C000-memory.dmp	upx
behavioral1/memory/2728-10-0x0000000000400000-0x000000000041C000-memory.dmp	upx
behavioral1/memory/2728-19-0x0000000000400000-0x000000000041C000-memory.dmp	upx
behavioral1/memory/2728-20-0x0000000000400000-0x000000000041C000-memory.dmp	upx
behavioral1/memory/2728-18-0x0000000000400000-0x000000000041C000-memory.dmp	upx
behavioral1/memory/2728-21-0x0000000000400000-0x000000000041C000-memory.dmp	upx
behavioral1/memory/2728-23-0x0000000000400000-0x000000000041C000-memory.dmp	upx
behavioral1/memory/2728-22-0x0000000000400000-0x000000000041C000-memory.dmp	upx
behavioral1/memory/2728-26-0x0000000000400000-0x000000000041C000-memory.dmp	upx

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1792 set thread context of 2728	1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe	31

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 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	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe
1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe
1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe
1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe
1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe
1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe
1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe
1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe
1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2728	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2728	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1792 wrote to memory of 2728	1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe	31
PID 1792 wrote to memory of 2728	1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe	31
PID 1792 wrote to memory of 2728	1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe	31
PID 1792 wrote to memory of 2728	1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe	31
PID 1792 wrote to memory of 2728	1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe	31
PID 1792 wrote to memory of 2728	1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe	31
PID 1792 wrote to memory of 2728	1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe	31
PID 1792 wrote to memory of 2728	1792	e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe	31

C:\Users\Admin\AppData\Local\Temp\e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1792
- C:\Users\Admin\AppData\Local\Temp\e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe
  "C:\Users\Admin\AppData\Local\Temp\e65bf8ac5f28f737825c765a71aabffe_JaffaCakes118.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2728

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

memory/1792-0-0x00000000744EE000-0x00000000744EF000-memory.dmp

Filesize
4KB

Download
memory/1792-1-0x0000000000B90000-0x0000000000BC6000-memory.dmp

Filesize
216KB

Download
memory/1792-2-0x00000000744E0000-0x0000000074BCE000-memory.dmp

Filesize
6.9MB

Download
memory/1792-3-0x0000000000400000-0x0000000000436000-memory.dmp

Filesize
216KB

Download
memory/1792-4-0x0000000000AA0000-0x0000000000AB8000-memory.dmp

Filesize
96KB

Download
memory/1792-5-0x0000000000440000-0x0000000000446000-memory.dmp

Filesize
24KB

Download
memory/1792-7-0x0000000004750000-0x0000000004764000-memory.dmp

Filesize
80KB

Download
memory/1792-25-0x00000000744E0000-0x0000000074BCE000-memory.dmp

Filesize
6.9MB

Download
memory/1792-24-0x00000000744EE000-0x00000000744EF000-memory.dmp

Filesize
4KB

Download
memory/2728-10-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2728-12-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2728-19-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2728-20-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2728-18-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2728-21-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2728-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2728-23-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2728-22-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2728-16-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2728-8-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download
memory/2728-26-0x0000000000400000-0x000000000041C000-memory.dmp

Filesize
112KB

Download

Analysis

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