remcos | 326395aaa7878f136cf1b425be58bafc14becbdf9541532abab89d4c6a6ab693

General

Target

eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe
Size

208KB
MD5

eb38e581ba2c7d46a2373dc9abc02b3b
SHA1

86d8449307be9bdeea725c56254fde1692b82a30
SHA256

326395aaa7878f136cf1b425be58bafc14becbdf9541532abab89d4c6a6ab693
SHA512

d09ebf20951ec472b3b68e02f79493049f0f81972327a8d12ee7b7a3c643bb8a5f2ad5377f1f228fda61f38bfffb2c2123ca17095c30ea94c24dbb2cc40ac800
SSDEEP

3072:NeVfhA2bkmeXqYVWYxB9dXAICnZy0+C1iX+7vzk5eP6dvT:NIAcheXZkYx/1AICnc0P1DbztPw

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

2.0.5 Pro

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
xi3s.exe
copy_folder
xi3x
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%Temp%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-NL03Y0
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
xi5w
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Checks computer location settings 2 TTPs 3 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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	tmp.exe

Executes dropped EXE 3 IoCs

pid	Process
3484	tmp.exe
840	.exe
1788	xi3s.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xi5w = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\xi3x\\xi3s.exe\""	tmp.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\xi5w = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\xi3x\\xi3s.exe\""	xi3s.exe

Drops desktop.ini file(s) 2 IoCs

description	ioc	Process
File created	C:\Windows\assembly\Desktop.ini	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2956 set thread context of 840	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe	96

Drops file in Windows directory 3 IoCs

description	ioc	Process
File opened for modification	C:\Windows\assembly	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe
File created	C:\Windows\assembly\Desktop.ini	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe
File opened for modification	C:\Windows\assembly\Desktop.ini	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.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 6 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	.exe
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	xi3s.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmp.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000_Classes\Local Settings	tmp.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe
2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe
2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe
2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe
2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe
Token: 33	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe
Token: SeIncBasePriorityPrivilege	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2956 wrote to memory of 3484	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe	95
PID 2956 wrote to memory of 3484	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe	95
PID 2956 wrote to memory of 3484	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe	95
PID 2956 wrote to memory of 840	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe	96
PID 2956 wrote to memory of 840	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe	96
PID 2956 wrote to memory of 840	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe	96
PID 2956 wrote to memory of 840	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe	96
PID 2956 wrote to memory of 840	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe	96
PID 2956 wrote to memory of 840	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe	96
PID 2956 wrote to memory of 840	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe	96
PID 2956 wrote to memory of 840	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe	96
PID 2956 wrote to memory of 840	2956	eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe	96
PID 3484 wrote to memory of 2980	3484	tmp.exe	97
PID 3484 wrote to memory of 2980	3484	tmp.exe	97
PID 3484 wrote to memory of 2980	3484	tmp.exe	97
PID 2980 wrote to memory of 2376	2980	WScript.exe	98
PID 2980 wrote to memory of 2376	2980	WScript.exe	98
PID 2980 wrote to memory of 2376	2980	WScript.exe	98
PID 2376 wrote to memory of 1788	2376	cmd.exe	100
PID 2376 wrote to memory of 1788	2376	cmd.exe	100
PID 2376 wrote to memory of 1788	2376	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\eb38e581ba2c7d46a2373dc9abc02b3b_JaffaCakes118.exe"
1⤵
- Checks computer location settings
- Drops desktop.ini file(s)
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2956
- C:\Users\Admin\AppData\Local\Temp\tmp.exe
  "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:3484
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - Checks computer location settings
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2980
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\xi3x\xi3s.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2376
    - - C:\Users\Admin\AppData\Local\Temp\xi3x\xi3s.exe
        
        C:\Users\Admin\AppData\Local\Temp\xi3x\xi3s.exe
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        
        PID:1788
- C:\Users\Admin\AppData\Local\Temp\.exe
  "C:\Users\Admin\AppData\Local\Temp\.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:840

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=3808,i,3387628439405076340,17957358341235678872,262144 --variations-seed-version --mojo-platform-channel-handle=1892 /prefetch:8
1⤵
PID:3876

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

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

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Downloads

C:\Users\Admin\AppData\Local\Temp\.exe

Filesize
1.6MB

MD5
1c9ff7df71493896054a91bee0322ebf

SHA1
38f1c85965d58b910d8e8381b6b1099d5dfcbfe4

SHA256
e8b5da3394bbdd7868122ffd88d9d06afe31bd69d656857910d2f820c32d0efa

SHA512
aa0def62b663743e6c3c022182b35cff33cb9abf08453d5098f3c5d32b2a8b0cd1cc5de64b93e39680c1d1396fef1fd50b642ca3ea4ba1f6d1078321d96916ab

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

Filesize
416B

MD5
453f89e2c8f4e830ac8db7611532f1dd

SHA1
d1e4a30ec5fd1067ade5d4a806457829038131ad

SHA256
533afaf7f3b5f135c3c9cfa7dc71bba8452949c40ba0d8ffc56daf87fb306936

SHA512
840c7af7dc1911f983a3f0005b9b0efa7b63161b62d53b859b29b3d2d313653d88a5e1db687f87fff1e47e233160fc96ed5067b4f11be6ef9f4bdf72c6b145df

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp.exe

Filesize
108KB

MD5
7ead38802bd7c0a3af677214f2ba23db

SHA1
f0c204c57146244c7e2cc744214c3deff5a9f4b6

SHA256
c75ba3917383a776dee26a215929d242b7896641a4157afa1d7d05913eb473fd

SHA512
88c35c02fc21850904f41563611b57f3bd6c39b649fd8017d6fc19135c87a2b288365020a04d2571a64a91772edda9444821301d69d1ba8b4702fb577b98ac69

Download Submit
memory/840-23-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/840-21-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/840-17-0x0000000000400000-0x000000000041B000-memory.dmp

Filesize
108KB

Download
memory/2956-0-0x00000000746F2000-0x00000000746F3000-memory.dmp

Filesize
4KB

Download
memory/2956-1-0x00000000746F0000-0x0000000074CA1000-memory.dmp

Filesize
5.7MB

Download
memory/2956-2-0x00000000746F0000-0x0000000074CA1000-memory.dmp

Filesize
5.7MB

Download
memory/2956-29-0x00000000746F2000-0x00000000746F3000-memory.dmp

Filesize
4KB

Download
memory/2956-31-0x00000000746F0000-0x0000000074CA1000-memory.dmp

Filesize
5.7MB

Download
memory/2956-32-0x00000000746F0000-0x0000000074CA1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads