remcos | 9d3039608025a43f763d86060b67c53deaf51c562ada90381325181681bd9db9

General

Target

f0deade5174321c58ad77324ab5588a8_JaffaCakes118.ps1
Size

1.4MB
MD5

f0deade5174321c58ad77324ab5588a8
SHA1

2b3a1492283804e8b5c430450f6b3851acab5e78
SHA256

9d3039608025a43f763d86060b67c53deaf51c562ada90381325181681bd9db9
SHA512

e469f2ee815c1ee742ff6266b57d0bf927a7a11cd2e984f12b9065c67696b1ef1e16eab8a1e185b18c8994bf3eb0727402ec49ee69ac7b8232073157a076e770
SSDEEP

24576:vw2O9/TgwrSUhVPHahmorI0hnvUwLS4PfzKRWkvc+4R:495cwOI0ZhMCBR

Score

10^/10

remcos rich-fam1-c.j discovery execution rat

Malware Config

Extracted

Family

remcos

Version

2.4.3 Pro

Botnet

Rich-Fam1-C.J

C2

rich-fam1.strangled.net:6628

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
3
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
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
oiuyg
keylog_path
%AppData%
mouse_option
false
mutex
iuytfdcuytf-Q5AT11
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

Drops startup file 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\licensingdiag.url	aflu.exe

Executes dropped EXE 1 IoCs

pid	Process
3680	aflu.exe

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x00090000000233f9-15.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3680 set thread context of 3764	3680	aflu.exe	88

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4300	powershell.exe

System Location Discovery: System Language Discovery 1 TTPs 1 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	aflu.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4300	powershell.exe
4300	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4300	powershell.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
3680	aflu.exe
3680	aflu.exe
3680	aflu.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
3680	aflu.exe
3680	aflu.exe
3680	aflu.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3764	explorer.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4300 wrote to memory of 3680	4300	powershell.exe	85
PID 4300 wrote to memory of 3680	4300	powershell.exe	85
PID 4300 wrote to memory of 3680	4300	powershell.exe	85
PID 3680 wrote to memory of 3764	3680	aflu.exe	88
PID 3680 wrote to memory of 3764	3680	aflu.exe	88
PID 3680 wrote to memory of 3764	3680	aflu.exe	88
PID 3680 wrote to memory of 3764	3680	aflu.exe	88
PID 3680 wrote to memory of 3764	3680	aflu.exe	88

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\f0deade5174321c58ad77324ab5588a8_JaffaCakes118.ps1
1⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4300
- C:\Users\Public\aflu.exe
  "C:\Users\Public\aflu.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:3680
- - C:\Windows\SysWOW64\explorer.exe
    "C:\Windows\SysWOW64\explorer.exe"
    3⤵
    - Suspicious use of SetWindowsHookEx
    PID:3764

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

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\__PSScriptPolicyTest_wmjommrr.ddj.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\oiuyg\logs.dat

Filesize
79B

MD5
d87c292881f59d30f44d7481c7f2e00e

SHA1
7577279793efb30da5d63e516a0f42d3796ce99f

SHA256
d0dbcd79b09e2d1ceb7cfc18cf42c6994c1bca30e5e6332c89a6ad660f02cdb6

SHA512
8a55bb16a8aa48a7a8e9e35c6b83e0a826ed03cbc646d585dcb464e258c2a0482fd8760198c1c2bb89ce83e9ad1eaadb010ef2e7033db9dd8cee5ca25d6189e2

Download Submit
C:\Users\Public\aflu.exe

Filesize
1.0MB

MD5
7ed692b4d0e973636bf6992d61ddb9a6

SHA1
3fbad00949c63c11a53747ad5da570122f00cf01

SHA256
a0e4d4e6f0413e242fa8723e7a8e98e76e0035421a2a5e1703e6233e8cb86326

SHA512
129cbf1ee3bde11a3189ac21f781f8caac81004d2154354932b48fe8c30d36d2f4a10422d1eb20cc29219b137ef2f716b50789d1ae722ee600f3e73a021a425d

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memory/3680-23-0x0000000000BF0000-0x0000000000BF1000-memory.dmp

Filesize
4KB

Download
memory/3764-24-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3764-35-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3764-32-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/3764-31-0x0000000000400000-0x0000000000420000-memory.dmp

Filesize
128KB

Download
memory/4300-11-0x00007FFB5CC90000-0x00007FFB5D751000-memory.dmp

Filesize
10.8MB

Download
memory/4300-18-0x00007FFB5CC90000-0x00007FFB5D751000-memory.dmp

Filesize
10.8MB

Download
memory/4300-12-0x00007FFB5CC90000-0x00007FFB5D751000-memory.dmp

Filesize
10.8MB

Download
memory/4300-0-0x00007FFB5CC93000-0x00007FFB5CC95000-memory.dmp

Filesize
8KB

Download
memory/4300-6-0x00000218F75B0000-0x00000218F75D2000-memory.dmp

Filesize
136KB

Download

Analysis

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