remcos | 73d157aceb0cbefa3a24509f157e8b59c40881acd0e3360d026fee5845e19f2c

Analysis

max time kernel
149s
max time network
149s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
04-09-2024 23:07

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General

Target

zBJC.exe
Size

962KB
MD5

094a5d7931f64c66d76b0fe5cc728262
SHA1

4a3cbbe7590ab3e7cd3c40fc62558aaaa251a3e8
SHA256

73d157aceb0cbefa3a24509f157e8b59c40881acd0e3360d026fee5845e19f2c
SHA512

c2b31f3aca35b2e048e1fa10a6f8ed972097651a0fb85be675e0b7ea8765e04ba7b1f68be8c5bef25f919dff56c49b139e5d1ef4cad4c472ed0dc281ee4905aa
SSDEEP

12288:AfOzlAPrLGY72HiM2AUpGNSfIKsAW1Nunhe2z8JBvR1unEhyDsRiWnze6EzyskDF:AfglYKG2Kwb3unMLBvh8sRdS6rd8Qt

Score

10^/10

remcos remotehost discovery execution rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

212.162.149.42:7118

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-WYBPPO
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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
4784	powershell.exe
3420	powershell.exe

Checks computer location settings 2 TTPs 1 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	zBJC.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2216 set thread context of 3888	2216	zBJC.exe	107

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	zBJC.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	zBJC.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
4548	schtasks.exe

Suspicious behavior: EnumeratesProcesses 14 IoCs

pid	Process
2216	zBJC.exe
2216	zBJC.exe
2216	zBJC.exe
2216	zBJC.exe
2216	zBJC.exe
2216	zBJC.exe
2216	zBJC.exe
3420	powershell.exe
3420	powershell.exe
4784	powershell.exe
4784	powershell.exe
2216	zBJC.exe
4784	powershell.exe
3420	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2216	zBJC.exe
Token: SeDebugPrivilege	3420	powershell.exe
Token: SeDebugPrivilege	4784	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2216 wrote to memory of 4784	2216	zBJC.exe	101
PID 2216 wrote to memory of 4784	2216	zBJC.exe	101
PID 2216 wrote to memory of 4784	2216	zBJC.exe	101
PID 2216 wrote to memory of 3420	2216	zBJC.exe	103
PID 2216 wrote to memory of 3420	2216	zBJC.exe	103
PID 2216 wrote to memory of 3420	2216	zBJC.exe	103
PID 2216 wrote to memory of 4548	2216	zBJC.exe	105
PID 2216 wrote to memory of 4548	2216	zBJC.exe	105
PID 2216 wrote to memory of 4548	2216	zBJC.exe	105
PID 2216 wrote to memory of 3888	2216	zBJC.exe	107
PID 2216 wrote to memory of 3888	2216	zBJC.exe	107
PID 2216 wrote to memory of 3888	2216	zBJC.exe	107
PID 2216 wrote to memory of 3888	2216	zBJC.exe	107
PID 2216 wrote to memory of 3888	2216	zBJC.exe	107
PID 2216 wrote to memory of 3888	2216	zBJC.exe	107
PID 2216 wrote to memory of 3888	2216	zBJC.exe	107
PID 2216 wrote to memory of 3888	2216	zBJC.exe	107
PID 2216 wrote to memory of 3888	2216	zBJC.exe	107
PID 2216 wrote to memory of 3888	2216	zBJC.exe	107
PID 2216 wrote to memory of 3888	2216	zBJC.exe	107
PID 2216 wrote to memory of 3888	2216	zBJC.exe	107

C:\Users\Admin\AppData\Local\Temp\zBJC.exe
"C:\Users\Admin\AppData\Local\Temp\zBJC.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2216
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\zBJC.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4784
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\OsUSvlotOYeups.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3420
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OsUSvlotOYeups" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8E0.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4548
- C:\Users\Admin\AppData\Local\Temp\zBJC.exe
  "C:\Users\Admin\AppData\Local\Temp\zBJC.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  PID:3888

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=3996,i,1729213506309163284,12809566808978835441,262144 --variations-seed-version --mojo-platform-channel-handle=3860 /prefetch:8
1⤵
PID:5032

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

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_32\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
968cb9309758126772781b83adb8a28f

SHA1
8da30e71accf186b2ba11da1797cf67f8f78b47c

SHA256
92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

SHA512
4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

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

Filesize
18KB

MD5
ab64c4abf4e8a4f7e002e4018540cf2b

SHA1
6dd45727d7c4cfddfe0a73d594d16a17c1589c1b

SHA256
f04ea27cd0ccb50caded3d81bfdab806c2df677f8f172e539d29729e5dc600af

SHA512
4cab4bd6f7e38a72683577850e5611b0742999e62ad85fc3d89482406af54ce9ba2b173edc5c259416e741f793aa598b3b914b6670faa7c5aa05ed766276b7fd

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_i1ammqak.1pc.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp8E0.tmp

Filesize
1KB

MD5
98919a43d1b9f837fef4b03ebd7fc349

SHA1
a0d73bd0ef5b42e715636a7592b3db98870edd64

SHA256
dac20d01f9d5053063de67bbbaf211bb341e6e12806586832c2956b07f2c62f9

SHA512
f0da786e324ab7ee7ba25e5da5cc0f9812709d2c153a5fea4fb0d6eab69198e2e30f6cc12d2d92d1727c1a2d98b25a18659bae89bc094ce142663ec6a152b640

Download Submit
memory/2216-4-0x0000000005610000-0x000000000561A000-memory.dmp

Filesize
40KB

Download
memory/2216-5-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/2216-6-0x0000000008180000-0x0000000008198000-memory.dmp

Filesize
96KB

Download
memory/2216-7-0x00000000750CE000-0x00000000750CF000-memory.dmp

Filesize
4KB

Download
memory/2216-8-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/2216-9-0x0000000006680000-0x000000000673E000-memory.dmp

Filesize
760KB

Download
memory/2216-10-0x0000000006940000-0x00000000069DC000-memory.dmp

Filesize
624KB

Download
memory/2216-3-0x0000000005440000-0x00000000054D2000-memory.dmp

Filesize
584KB

Download
memory/2216-2-0x0000000005AA0000-0x0000000006044000-memory.dmp

Filesize
5.6MB

Download
memory/2216-0-0x00000000750CE000-0x00000000750CF000-memory.dmp

Filesize
4KB

Download
memory/2216-51-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/2216-1-0x0000000000970000-0x0000000000A64000-memory.dmp

Filesize
976KB

Download
memory/3420-53-0x0000000006200000-0x000000000624C000-memory.dmp

Filesize
304KB

Download
memory/3420-57-0x00000000064F0000-0x0000000006522000-memory.dmp

Filesize
200KB

Download
memory/3420-21-0x0000000005720000-0x0000000005786000-memory.dmp

Filesize
408KB

Download
memory/3420-20-0x0000000005030000-0x0000000005096000-memory.dmp

Filesize
408KB

Download
memory/3420-24-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/3420-19-0x0000000004E90000-0x0000000004EB2000-memory.dmp

Filesize
136KB

Download
memory/3420-31-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/3420-97-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/3420-90-0x00000000075A0000-0x00000000075A8000-memory.dmp

Filesize
32KB

Download
memory/3420-89-0x00000000075C0000-0x00000000075DA000-memory.dmp

Filesize
104KB

Download
memory/3420-88-0x00000000074C0000-0x00000000074D4000-memory.dmp

Filesize
80KB

Download
memory/3420-87-0x00000000074B0000-0x00000000074BE000-memory.dmp

Filesize
56KB

Download
memory/3420-22-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/3420-86-0x0000000007480000-0x0000000007491000-memory.dmp

Filesize
68KB

Download
memory/3420-52-0x0000000005E20000-0x0000000005E3E000-memory.dmp

Filesize
120KB

Download
memory/3420-75-0x0000000007500000-0x0000000007596000-memory.dmp

Filesize
600KB

Download
memory/3420-74-0x00000000072D0000-0x00000000072DA000-memory.dmp

Filesize
40KB

Download
memory/3420-70-0x00000000078A0000-0x0000000007F1A000-memory.dmp

Filesize
6.5MB

Download
memory/3420-71-0x0000000007260000-0x000000000727A000-memory.dmp

Filesize
104KB

Download
memory/3420-68-0x0000000006530000-0x000000000654E000-memory.dmp

Filesize
120KB

Download
memory/3420-69-0x0000000006F40000-0x0000000006FE3000-memory.dmp

Filesize
652KB

Download
memory/3420-58-0x0000000075950000-0x000000007599C000-memory.dmp

Filesize
304KB

Download
memory/3888-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-49-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-54-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-73-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-55-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-105-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-56-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-99-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-104-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-103-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-102-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-101-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-100-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3888-98-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4784-17-0x00000000058E0000-0x0000000005F08000-memory.dmp

Filesize
6.2MB

Download
memory/4784-30-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/4784-96-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/4784-15-0x0000000005110000-0x0000000005146000-memory.dmp

Filesize
216KB

Download
memory/4784-16-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/4784-39-0x00000000060D0000-0x0000000006424000-memory.dmp

Filesize
3.3MB

Download
memory/4784-18-0x00000000750C0000-0x0000000075870000-memory.dmp

Filesize
7.7MB

Download
memory/4784-76-0x0000000075950000-0x000000007599C000-memory.dmp

Filesize
304KB

Download