purecrypter | 53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

Analysis

max time kernel
150s
max time network
142s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
03-02-2023 19:07

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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/2008-56-0x0000000007560000-0x00000000077FE000-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 2 IoCs

pid	Process
308	rdfghfgjkgoighjc.exe
1612	rdfghfgjkgoighjc.exe

Loads dropped DLL 1 IoCs

pid	Process
1052	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe

Adds Run key to start application 2 TTPs 10 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\rdfghfgjkgoighjc.exe\""	rdfghfgjkgoighjc.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-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\Phecxlkxbf = "\"C:\\Users\\Admin\\AppData\\Roaming\\Zwpfblvosjv\\Phecxlkxbf.exe\""	rdfghfgjkgoighjc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\rdfghfgjkgoighjc.exe\""	rdfghfgjkgoighjc.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	rdfghfgjkgoighjc.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\	rdfghfgjkgoighjc.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\Phecxlkxbf = "\"C:\\Users\\Admin\\AppData\\Roaming\\Zwpfblvosjv\\Phecxlkxbf.exe\""	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Key created	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\Software\Microsoft\Windows\CurrentVersion\Run\	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3385717845-2518323428-350143044-1000\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

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2008 set thread context of 1052	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 308 set thread context of 1612	308	rdfghfgjkgoighjc.exe	34

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 2 IoCs

pid	Process
1912	powershell.exe
1044	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
Token: SeDebugPrivilege	1912	powershell.exe
Token: SeDebugPrivilege	308	rdfghfgjkgoighjc.exe
Token: SeDebugPrivilege	1044	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1612	rdfghfgjkgoighjc.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 2008 wrote to memory of 1912	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	28
PID 2008 wrote to memory of 1912	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	28
PID 2008 wrote to memory of 1912	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	28
PID 2008 wrote to memory of 1912	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	28
PID 2008 wrote to memory of 1052	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 2008 wrote to memory of 1052	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 2008 wrote to memory of 1052	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 2008 wrote to memory of 1052	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 2008 wrote to memory of 1052	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 2008 wrote to memory of 1052	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 2008 wrote to memory of 1052	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 2008 wrote to memory of 1052	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 2008 wrote to memory of 1052	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 2008 wrote to memory of 1052	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 2008 wrote to memory of 1052	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 2008 wrote to memory of 1052	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 2008 wrote to memory of 1052	2008	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	30
PID 1052 wrote to memory of 308	1052	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	31
PID 1052 wrote to memory of 308	1052	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	31
PID 1052 wrote to memory of 308	1052	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	31
PID 1052 wrote to memory of 308	1052	d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe	31
PID 308 wrote to memory of 1044	308	rdfghfgjkgoighjc.exe	32
PID 308 wrote to memory of 1044	308	rdfghfgjkgoighjc.exe	32
PID 308 wrote to memory of 1044	308	rdfghfgjkgoighjc.exe	32
PID 308 wrote to memory of 1044	308	rdfghfgjkgoighjc.exe	32
PID 308 wrote to memory of 1612	308	rdfghfgjkgoighjc.exe	34
PID 308 wrote to memory of 1612	308	rdfghfgjkgoighjc.exe	34
PID 308 wrote to memory of 1612	308	rdfghfgjkgoighjc.exe	34
PID 308 wrote to memory of 1612	308	rdfghfgjkgoighjc.exe	34
PID 308 wrote to memory of 1612	308	rdfghfgjkgoighjc.exe	34
PID 308 wrote to memory of 1612	308	rdfghfgjkgoighjc.exe	34
PID 308 wrote to memory of 1612	308	rdfghfgjkgoighjc.exe	34
PID 308 wrote to memory of 1612	308	rdfghfgjkgoighjc.exe	34
PID 308 wrote to memory of 1612	308	rdfghfgjkgoighjc.exe	34
PID 308 wrote to memory of 1612	308	rdfghfgjkgoighjc.exe	34
PID 308 wrote to memory of 1612	308	rdfghfgjkgoighjc.exe	34
PID 308 wrote to memory of 1612	308	rdfghfgjkgoighjc.exe	34
PID 308 wrote to memory of 1612	308	rdfghfgjkgoighjc.exe	34

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 use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2008
- 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:1912
- 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:1052
- - C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
    "C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:308
  - - 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:1044
  - - C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
      C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:1612

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:\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
bb07b35801c1bfa88ab76c61fa8e7294

SHA1
cd5baccdd44e2dce4ca07f4f5af03da12c2c6503

SHA256
1bb9a46f3b72d24148f92c9fa84b578e84cf4ffa55e1729cf65257b19004e54a

SHA512
bcc0b393bc9f6c9f11aa4dd2c96e6c89fcbc82b3e1754021b2594b093cd766f211849d43c598f4c5e793952b2d6f5376236d9f2eced3b56ffac4ff84915656c3

Download Submit
C:\Users\Admin\AppData\Roaming\Zwpfblvosjv\Phecxlkxbf.exe

Filesize
7KB

MD5
b359f4af5c88b1e237db9738415b7682

SHA1
d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

SHA256
53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

SHA512
6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

Download Submit
\ProgramData\Remcos\rdfghfgjkgoighjc.exe

Filesize
7KB

MD5
b359f4af5c88b1e237db9738415b7682

SHA1
d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

SHA256
53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

SHA512
6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

Download Submit
memory/308-86-0x0000000000110000-0x0000000000118000-memory.dmp

Filesize
32KB

Download
memory/1044-93-0x000000006F200000-0x000000006F7AB000-memory.dmp

Filesize
5.7MB

Download
memory/1044-92-0x000000006F200000-0x000000006F7AB000-memory.dmp

Filesize
5.7MB

Download
memory/1044-91-0x000000006F200000-0x000000006F7AB000-memory.dmp

Filesize
5.7MB

Download
memory/1052-64-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1052-63-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1052-71-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1052-73-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1052-75-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1052-79-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1052-80-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1052-69-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1052-84-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1052-68-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1052-66-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1052-70-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1612-112-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1612-113-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1612-114-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1912-61-0x000000006F220000-0x000000006F7CB000-memory.dmp

Filesize
5.7MB

Download
memory/1912-60-0x000000006F220000-0x000000006F7CB000-memory.dmp

Filesize
5.7MB

Download
memory/1912-59-0x000000006F220000-0x000000006F7CB000-memory.dmp

Filesize
5.7MB

Download
memory/2008-54-0x0000000000930000-0x0000000000938000-memory.dmp

Filesize
32KB

Download
memory/2008-62-0x0000000004F90000-0x0000000005010000-memory.dmp

Filesize
512KB

Download
memory/2008-56-0x0000000007560000-0x00000000077FE000-memory.dmp

Filesize
2.6MB

Download
memory/2008-55-0x0000000074FD1000-0x0000000074FD3000-memory.dmp

Filesize
8KB

Download