purecrypter | 1060b71f9fd78f5d283b8295def74b2b1457fb4949815fa8442904cd75329d4a

General

Target

tmp.exe
Size

19KB
MD5

17abf0697eea43427b7e0ea295a09c2f
SHA1

9665076d470f2c614f58f36839591347f4236668
SHA256

1060b71f9fd78f5d283b8295def74b2b1457fb4949815fa8442904cd75329d4a
SHA512

dbf7a7bbf3488300ad688260cc2aa33e0fe4ef82b2ac430b2b4d0661e20f5e7259bf456e478ab1c3cc0120a7b33acf97bbffcc6e8c74e694f1785395635a25d4
SSDEEP

192:FPLL2GSnvjtt6BtFIEZtltPtptUtCttttZ6fWdZAphAtttWnTC/F:9fSvW+hhnG/

Score

10^/10

purecrypter remcos mstox downloader loader rat

Malware Config

Extracted

Family

purecrypter

C2

http://121.4.69.26:53712/Sjewbm.dat

Extracted

Family

remcos

Botnet

MStox

C2

80.66.75.126:53813

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
17
connect_interval
8
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
false
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-6QBZSN
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/1716-56-0x0000000005C20000-0x0000000005EB0000-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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1716 set thread context of 984	1716	tmp.exe	29

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 1 IoCs

pid	Process
1756	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1716	tmp.exe
Token: SeDebugPrivilege	1756	powershell.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1716 wrote to memory of 1756	1716	tmp.exe	27
PID 1716 wrote to memory of 1756	1716	tmp.exe	27
PID 1716 wrote to memory of 1756	1716	tmp.exe	27
PID 1716 wrote to memory of 1756	1716	tmp.exe	27
PID 1716 wrote to memory of 984	1716	tmp.exe	29
PID 1716 wrote to memory of 984	1716	tmp.exe	29
PID 1716 wrote to memory of 984	1716	tmp.exe	29
PID 1716 wrote to memory of 984	1716	tmp.exe	29
PID 1716 wrote to memory of 984	1716	tmp.exe	29
PID 1716 wrote to memory of 984	1716	tmp.exe	29
PID 1716 wrote to memory of 984	1716	tmp.exe	29
PID 1716 wrote to memory of 984	1716	tmp.exe	29
PID 1716 wrote to memory of 984	1716	tmp.exe	29
PID 1716 wrote to memory of 984	1716	tmp.exe	29
PID 1716 wrote to memory of 984	1716	tmp.exe	29
PID 1716 wrote to memory of 984	1716	tmp.exe	29
PID 1716 wrote to memory of 984	1716	tmp.exe	29

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1716
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMwA5AA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1756
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  PID:984

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/984-73-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-70-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-63-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-64-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-75-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-71-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-66-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-80-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-69-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/984-68-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1716-62-0x0000000005480000-0x0000000005500000-memory.dmp

Filesize
512KB

Download
memory/1716-55-0x00000000765B1000-0x00000000765B3000-memory.dmp

Filesize
8KB

Download
memory/1716-54-0x00000000009B0000-0x00000000009BA000-memory.dmp

Filesize
40KB

Download
memory/1716-56-0x0000000005C20000-0x0000000005EB0000-memory.dmp

Filesize
2.6MB

Download
memory/1756-61-0x000000006F600000-0x000000006FBAB000-memory.dmp

Filesize
5.7MB

Download
memory/1756-60-0x000000006F600000-0x000000006FBAB000-memory.dmp

Filesize
5.7MB

Download
memory/1756-59-0x000000006F600000-0x000000006FBAB000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads