purecrypter | f00982603a693995cf32649df28ac390ce839638751f04d11517454466061785

General

Target

7034c12131cc2e28fcf9235850a36b08e9983dce.exe
Size

7KB
MD5

1c72fb093ace75fffb093c6541ff4940
SHA1

7034c12131cc2e28fcf9235850a36b08e9983dce
SHA256

f00982603a693995cf32649df28ac390ce839638751f04d11517454466061785
SHA512

4d713c85e2b5a818e3f5db4c7b59a820bb309c911825670b540597c9faa9d931f5648d054e19a01a48f7c97bae6dfe67b02148fb3ad58ddafdd11bb06f8a59ed
SSDEEP

96:lTlsnKYgr+QLZCMqm18WQ2juY+wq+Df/8tEkajtR/zNt:lpQELZCMqmXjuZ+z8zaj7p

Score

10^/10

purecrypter remcos 28282 downloader loader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

28282

C2

194.180.49.17:28282

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
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
gqhwjekrltlu-TOU33Q
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/1292-56-0x00000000061B0000-0x000000000644C000-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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\Eesibjdz = "\"C:\\Users\\Admin\\AppData\\Roaming\\Gngrey\\Eesibjdz.exe\""	7034c12131cc2e28fcf9235850a36b08e9983dce.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1292 set thread context of 1932	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	30

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
304	powershell.exe
1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe
Token: SeDebugPrivilege	304	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1292 wrote to memory of 304	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	26
PID 1292 wrote to memory of 304	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	26
PID 1292 wrote to memory of 304	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	26
PID 1292 wrote to memory of 304	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	26
PID 1292 wrote to memory of 1748	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	29
PID 1292 wrote to memory of 1748	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	29
PID 1292 wrote to memory of 1748	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	29
PID 1292 wrote to memory of 1748	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	29
PID 1292 wrote to memory of 1932	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	30
PID 1292 wrote to memory of 1932	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	30
PID 1292 wrote to memory of 1932	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	30
PID 1292 wrote to memory of 1932	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	30
PID 1292 wrote to memory of 1932	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	30
PID 1292 wrote to memory of 1932	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	30
PID 1292 wrote to memory of 1932	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	30
PID 1292 wrote to memory of 1932	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	30
PID 1292 wrote to memory of 1932	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	30
PID 1292 wrote to memory of 1932	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	30
PID 1292 wrote to memory of 1932	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	30
PID 1292 wrote to memory of 1932	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	30
PID 1292 wrote to memory of 1932	1292	7034c12131cc2e28fcf9235850a36b08e9983dce.exe	30

C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe
"C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1292
- 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:304
- C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe
  C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe
  2⤵
  PID:1748
- C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe
  C:\Users\Admin\AppData\Local\Temp\7034c12131cc2e28fcf9235850a36b08e9983dce.exe
  2⤵
  PID:1932

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/304-59-0x000000006F100000-0x000000006F6AB000-memory.dmp

Filesize
5.7MB

Download
memory/304-60-0x000000006F100000-0x000000006F6AB000-memory.dmp

Filesize
5.7MB

Download
memory/304-61-0x000000006F100000-0x000000006F6AB000-memory.dmp

Filesize
5.7MB

Download
memory/1292-54-0x0000000000290000-0x0000000000298000-memory.dmp

Filesize
32KB

Download
memory/1292-55-0x0000000075E81000-0x0000000075E83000-memory.dmp

Filesize
8KB

Download
memory/1292-56-0x00000000061B0000-0x000000000644C000-memory.dmp

Filesize
2.6MB

Download
memory/1292-62-0x0000000004D90000-0x0000000004E10000-memory.dmp

Filesize
512KB

Download
memory/1932-66-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1932-64-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1932-63-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1932-68-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1932-69-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1932-70-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1932-71-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1932-73-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1932-75-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1932-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1932-80-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1932-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

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