remcos | 1224fa13afd1f551b4400cf7c6e35da7d686824e3e9191ee8714d620660c5fbb

General

Target

e8f3b6078e6629f2f9e0ccff6074df39_JaffaCakes118.exe
Size

244KB
MD5

e8f3b6078e6629f2f9e0ccff6074df39
SHA1

77f477758e2f646f66664be70e99da9dff71a02a
SHA256

1224fa13afd1f551b4400cf7c6e35da7d686824e3e9191ee8714d620660c5fbb
SHA512

5d7a65fe447d3297fecafbac8f815295d2de7fefe2b9053a3f22464b351c5e4bc2abb76a13ed1e2760f7b4354fa49813b800a99a478c859bec7cfb77fe4d9f77
SSDEEP

6144:4BQ+48EIY22Fy+154GSlz9kBCFJETm7KBTdYEvf5q/jveLu:4BN48E/54xlz9kAmBfYEA/bgu

Score

10^/10

remcos discovery rat

Malware Config

Signatures

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

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000\Control Panel\International\Geo\Nation	e8f3b6078e6629f2f9e0ccff6074df39_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
548	Scg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 548 set thread context of 3292	548	Scg.exe	98

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 4 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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Scg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	e8f3b6078e6629f2f9e0ccff6074df39_JaffaCakes118.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2629364133-3182087385-364449604-1000_Classes\Local Settings	e8f3b6078e6629f2f9e0ccff6074df39_JaffaCakes118.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
964	e8f3b6078e6629f2f9e0ccff6074df39_JaffaCakes118.exe
548	Scg.exe
548	Scg.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 964 wrote to memory of 3684	964	e8f3b6078e6629f2f9e0ccff6074df39_JaffaCakes118.exe	93
PID 964 wrote to memory of 3684	964	e8f3b6078e6629f2f9e0ccff6074df39_JaffaCakes118.exe	93
PID 964 wrote to memory of 3684	964	e8f3b6078e6629f2f9e0ccff6074df39_JaffaCakes118.exe	93
PID 3684 wrote to memory of 4900	3684	WScript.exe	94
PID 3684 wrote to memory of 4900	3684	WScript.exe	94
PID 3684 wrote to memory of 4900	3684	WScript.exe	94
PID 4900 wrote to memory of 548	4900	cmd.exe	97
PID 4900 wrote to memory of 548	4900	cmd.exe	97
PID 4900 wrote to memory of 548	4900	cmd.exe	97
PID 548 wrote to memory of 3292	548	Scg.exe	98
PID 548 wrote to memory of 3292	548	Scg.exe	98
PID 548 wrote to memory of 3292	548	Scg.exe	98
PID 548 wrote to memory of 3292	548	Scg.exe	98
PID 548 wrote to memory of 3292	548	Scg.exe	98
PID 548 wrote to memory of 3292	548	Scg.exe	98
PID 548 wrote to memory of 3292	548	Scg.exe	98
PID 548 wrote to memory of 3292	548	Scg.exe	98
PID 548 wrote to memory of 3292	548	Scg.exe	98
PID 548 wrote to memory of 3292	548	Scg.exe	98

C:\Users\Admin\AppData\Local\Temp\e8f3b6078e6629f2f9e0ccff6074df39_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\e8f3b6078e6629f2f9e0ccff6074df39_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:964
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3684
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\RSSCom\Scg.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4900
  - - C:\Users\Admin\AppData\Roaming\RSSCom\Scg.exe
      C:\Users\Admin\AppData\Roaming\RSSCom\Scg.exe
      4⤵
      Executes dropped EXE
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      PID:548
    - - C:\Windows\SysWOW64\svchost.exe
        
        C:\Windows\SysWOW64\svchost.exe
        5⤵
        
        PID:3292

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.vbs

Filesize
412B

MD5
86c39fbe1dc4d30557695bb2ca71401b

SHA1
436ebc86cd6208bf06d5b4c3a436b2929363a8b4

SHA256
b6042a1f0d1222ebdd74836fc7d665af97e9c7b6e938a1a5f3a6e88ca1597809

SHA512
a25f2bad6ec4ba1e297f82ec3a80e74c0c7c62ae3c0fce45e58f751b14d23bb80ac79ea9e82ba3f5f3161f2006f29a0f4a911d23cb69f65fe0eb938031740fe0

Download Submit
C:\Users\Admin\AppData\Roaming\RSSCom\Scg.exe

Filesize
244KB

MD5
e8f3b6078e6629f2f9e0ccff6074df39

SHA1
77f477758e2f646f66664be70e99da9dff71a02a

SHA256
1224fa13afd1f551b4400cf7c6e35da7d686824e3e9191ee8714d620660c5fbb

SHA512
5d7a65fe447d3297fecafbac8f815295d2de7fefe2b9053a3f22464b351c5e4bc2abb76a13ed1e2760f7b4354fa49813b800a99a478c859bec7cfb77fe4d9f77

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

Filesize
79B

MD5
31dc097b5bb5d8ebd52a8ca98224e163

SHA1
e24bdf12154a11ff0f8050d804dbbdac82493465

SHA256
c2ebf0754d44271ff8451ea6f2ed9851a8aa0b531c796f4a6fc768dbef888a4d

SHA512
93cb098c61b974f281e08d262351e9dd4148a16aaba6badccfd32450a4aaf07bb6515e4becc0fd29f67212874b06234895e1380c88fd1c53845b0bfdd2199f99

Download Submit
memory/548-18-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/548-21-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/964-2-0x0000000077AA1000-0x0000000077BC1000-memory.dmp

Filesize
1.1MB

Download
memory/964-4-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/964-7-0x0000000000400000-0x000000000043D000-memory.dmp

Filesize
244KB

Download
memory/964-10-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/3292-23-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

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