purecrypter | 53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

Analysis

max time kernel
137s
max time network
160s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
03/02/2023, 19:18

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General

Target

d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Size

7KB
MD5

b359f4af5c88b1e237db9738415b7682
SHA1

d7fa6d87594ea4d8b5740d54fdc204b08f4e9439
SHA256

53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd
SHA512

6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb
SSDEEP

96:xtEsKVeCVIP7bLp8LAn5c8aY1ej/kKV+J2qzNt:xUVVIP7bLrEOejcKYx

Score

10^/10

purecrypter remcos remotehost downloader loader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

194.180.49.17:28282

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
rdfghfgjkgoighjc.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-PC1DJ2
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

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/1728-56-0x00000000073E0000-0x000000000767E000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Executes dropped EXE 1 IoCs

pid	Process
920	rdfghfgjkgoighjc.exe

Loads dropped DLL 1 IoCs

pid	Process
1804	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe

Adds Run key to start application 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\rdfghfgjkgoighjc.exe\""	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\rdfghfgjkgoighjc.exe\""	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Run\Phecxlkxbf = "\"C:\\Users\\Admin\\AppData\\Roaming\\Zwpfblvosjv\\Phecxlkxbf.exe\""	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1728 set thread context of 1804	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	33

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
1556	powershell.exe
1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
900	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Token: SeDebugPrivilege	1556	powershell.exe
Token: SeDebugPrivilege	920	rdfghfgjkgoighjc.exe
Token: SeDebugPrivilege	900	powershell.exe

Suspicious use of WriteProcessMemory 37 IoCs

description	pid	Process	procid_target
PID 1728 wrote to memory of 1556	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	28
PID 1728 wrote to memory of 1556	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	28
PID 1728 wrote to memory of 1556	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	28
PID 1728 wrote to memory of 1556	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	28
PID 1728 wrote to memory of 1244	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 1728 wrote to memory of 1244	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 1728 wrote to memory of 1244	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 1728 wrote to memory of 1244	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 1728 wrote to memory of 564	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	31
PID 1728 wrote to memory of 564	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	31
PID 1728 wrote to memory of 564	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	31
PID 1728 wrote to memory of 564	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	31
PID 1728 wrote to memory of 360	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	32
PID 1728 wrote to memory of 360	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	32
PID 1728 wrote to memory of 360	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	32
PID 1728 wrote to memory of 360	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	32
PID 1728 wrote to memory of 1804	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	33
PID 1728 wrote to memory of 1804	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	33
PID 1728 wrote to memory of 1804	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	33
PID 1728 wrote to memory of 1804	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	33
PID 1728 wrote to memory of 1804	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	33
PID 1728 wrote to memory of 1804	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	33
PID 1728 wrote to memory of 1804	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	33
PID 1728 wrote to memory of 1804	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	33
PID 1728 wrote to memory of 1804	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	33
PID 1728 wrote to memory of 1804	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	33
PID 1728 wrote to memory of 1804	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	33
PID 1728 wrote to memory of 1804	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	33
PID 1728 wrote to memory of 1804	1728	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	33
PID 1804 wrote to memory of 920	1804	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	34
PID 1804 wrote to memory of 920	1804	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	34
PID 1804 wrote to memory of 920	1804	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	34
PID 1804 wrote to memory of 920	1804	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	34
PID 920 wrote to memory of 900	920	rdfghfgjkgoighjc.exe	35
PID 920 wrote to memory of 900	920	rdfghfgjkgoighjc.exe	35
PID 920 wrote to memory of 900	920	rdfghfgjkgoighjc.exe	35
PID 920 wrote to memory of 900	920	rdfghfgjkgoighjc.exe	35

C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
"C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1728
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1556
- C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
  C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
  2⤵
  PID:1244
- C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
  C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
  2⤵
  PID:564
- C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
  C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
  2⤵
  PID:360
- C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
  C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:1804
- - C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
    "C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:920
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:900

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe

Filesize
7KB

MD5
b359f4af5c88b1e237db9738415b7682

SHA1
d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

SHA256
53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

SHA512
6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

Download Submit
C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe

Filesize
7KB

MD5
b359f4af5c88b1e237db9738415b7682

SHA1
d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

SHA256
53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

SHA512
6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
9a7b1e051c31055dd866229588b7a358

SHA1
56d64f8581091496ef006f2a64f2c029e3e6f0fa

SHA256
9925e825e91dc0a73d3fe3b5088927f917a6d6e20d0d99c2355d70ec1ebeb4ad

SHA512
9829b0d391ebd0a6c111f95d3a3e9692fac6df0d64ceac6c0805037825fd057f271bc31d3a6ee92dc62b512bfca1757de4fe5a39c947c7791cef5bc909771605

Download Submit
\ProgramData\Remcos\rdfghfgjkgoighjc.exe

Filesize
7KB

MD5
b359f4af5c88b1e237db9738415b7682

SHA1
d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

SHA256
53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

SHA512
6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

Download Submit
memory/900-90-0x000000006F860000-0x000000006FE0B000-memory.dmp

Filesize
5.7MB

Download
memory/920-85-0x0000000000360000-0x0000000000368000-memory.dmp

Filesize
32KB

Download
memory/1556-59-0x000000006F8A0000-0x000000006FE4B000-memory.dmp

Filesize
5.7MB

Download
memory/1556-60-0x000000006F8A0000-0x000000006FE4B000-memory.dmp

Filesize
5.7MB

Download
memory/1556-61-0x000000006F8A0000-0x000000006FE4B000-memory.dmp

Filesize
5.7MB

Download
memory/1728-62-0x0000000004D30000-0x0000000004DB0000-memory.dmp

Filesize
512KB

Download
memory/1728-54-0x0000000000150000-0x0000000000158000-memory.dmp

Filesize
32KB

Download
memory/1728-55-0x0000000075BA1000-0x0000000075BA3000-memory.dmp

Filesize
8KB

Download
memory/1728-56-0x00000000073E0000-0x000000000767E000-memory.dmp

Filesize
2.6MB

Download
memory/1804-69-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1804-79-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1804-70-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1804-83-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1804-68-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1804-66-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1804-64-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1804-63-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1804-75-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1804-73-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1804-71-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download