purecrypter | a2f3bb5998f5e8079f4556198531fa771f3b6cfd9cffd8f684e1a30e6191b97a

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20220901-en
resource tags

arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
submitted
06/02/2023, 10:49

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General

Target

70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe
Size

2.5MB
MD5

e1c771cceb693ea14bbcde32ac1355fc
SHA1

bc2da06db4b0cc42595b7761ff990e303441cd99
SHA256

70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9
SHA512

fcbb24d7f938145fb82bd6d1d609a4416d78a9285499078ddabf558cac050319bac06c2b6fccdea3ec558e71c5589fb2bc76c6bee6cb4d02dd2691ded8ef2eff
SSDEEP

24576:CsLDsY5ohQjNm5lGrJrGU/thfLixwfA7DgCBbZoiSNy5aKg88vX6yqlAtVULkfSO:C3FYVr4U/3L7yRAUQKuakLomg0BqKqw

Score

10^/10

purecrypter remcos ikmerro2023 downloader loader persistence rat

Malware Config

Extracted

Family

remcos

Botnet

IKMERRO2023

5.2.68.82:1198

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
Explorer.exe
copy_folder
ATM Machine
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
true
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
1234567ME
mouse_option
false
mutex
12345ME-2V5C4Q
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Explorer
take_screenshot_option
false
take_screenshot_time
5

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/860-55-0x0000000004B70000-0x0000000004E00000-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
288	Explorer.exe
1900	Explorer.exe

Loads dropped DLL 1 IoCs

pid	Process
532	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe

Adds Run key to start application 2 TTPs 10 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\Dgtxdkhrpw = "\"C:\\Users\\Admin\\AppData\\Roaming\\Kyjsafxspwa\\Dgtxdkhrpw.exe\""	Explorer.exe
Key created	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\	Explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\Explorer = "\"C:\\ProgramData\\ATM Machine\\Explorer.exe\""	Explorer.exe
Key created	\REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\	Explorer.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\Dgtxdkhrpw = "\"C:\\Users\\Admin\\AppData\\Roaming\\Kyjsafxspwa\\Dgtxdkhrpw.exe\""	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4063495947-34355257-727531523-1000\Software\Microsoft\Windows\CurrentVersion\Run\Explorer = "\"C:\\ProgramData\\ATM Machine\\Explorer.exe\""	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Explorer = "\"C:\\ProgramData\\ATM Machine\\Explorer.exe\""	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Explorer = "\"C:\\ProgramData\\ATM Machine\\Explorer.exe\""	Explorer.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 860 set thread context of 532	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	29
PID 288 set thread context of 1900	288	Explorer.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 2 IoCs

pid	Process
1964	powershell.exe
1832	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe
Token: SeDebugPrivilege	1964	powershell.exe
Token: SeDebugPrivilege	288	Explorer.exe
Token: SeDebugPrivilege	1832	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1900	Explorer.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 860 wrote to memory of 1964	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	27
PID 860 wrote to memory of 1964	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	27
PID 860 wrote to memory of 1964	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	27
PID 860 wrote to memory of 1964	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	27
PID 860 wrote to memory of 532	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	29
PID 860 wrote to memory of 532	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	29
PID 860 wrote to memory of 532	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	29
PID 860 wrote to memory of 532	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	29
PID 860 wrote to memory of 532	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	29
PID 860 wrote to memory of 532	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	29
PID 860 wrote to memory of 532	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	29
PID 860 wrote to memory of 532	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	29
PID 860 wrote to memory of 532	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	29
PID 860 wrote to memory of 532	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	29
PID 860 wrote to memory of 532	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	29
PID 860 wrote to memory of 532	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	29
PID 860 wrote to memory of 532	860	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	29
PID 532 wrote to memory of 288	532	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	30
PID 532 wrote to memory of 288	532	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	30
PID 532 wrote to memory of 288	532	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	30
PID 532 wrote to memory of 288	532	70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe	30
PID 288 wrote to memory of 1832	288	Explorer.exe	31
PID 288 wrote to memory of 1832	288	Explorer.exe	31
PID 288 wrote to memory of 1832	288	Explorer.exe	31
PID 288 wrote to memory of 1832	288	Explorer.exe	31
PID 288 wrote to memory of 1900	288	Explorer.exe	33
PID 288 wrote to memory of 1900	288	Explorer.exe	33
PID 288 wrote to memory of 1900	288	Explorer.exe	33
PID 288 wrote to memory of 1900	288	Explorer.exe	33
PID 288 wrote to memory of 1900	288	Explorer.exe	33
PID 288 wrote to memory of 1900	288	Explorer.exe	33
PID 288 wrote to memory of 1900	288	Explorer.exe	33
PID 288 wrote to memory of 1900	288	Explorer.exe	33
PID 288 wrote to memory of 1900	288	Explorer.exe	33
PID 288 wrote to memory of 1900	288	Explorer.exe	33
PID 288 wrote to memory of 1900	288	Explorer.exe	33
PID 288 wrote to memory of 1900	288	Explorer.exe	33
PID 288 wrote to memory of 1900	288	Explorer.exe	33

C:\Users\Admin\AppData\Local\Temp\70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe
"C:\Users\Admin\AppData\Local\Temp\70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:860
- 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:1964
- C:\Users\Admin\AppData\Local\Temp\70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe
  C:\Users\Admin\AppData\Local\Temp\70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9.exe
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - Suspicious use of WriteProcessMemory
  PID:532
- - C:\ProgramData\ATM Machine\Explorer.exe
    "C:\ProgramData\ATM Machine\Explorer.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:288
  - - 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:1832
  - - C:\ProgramData\ATM Machine\Explorer.exe
      "C:\ProgramData\ATM Machine\Explorer.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:1900

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\ATM Machine\Explorer.exe

Filesize
2.5MB

MD5
e1c771cceb693ea14bbcde32ac1355fc

SHA1
bc2da06db4b0cc42595b7761ff990e303441cd99

SHA256
70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9

SHA512
fcbb24d7f938145fb82bd6d1d609a4416d78a9285499078ddabf558cac050319bac06c2b6fccdea3ec558e71c5589fb2bc76c6bee6cb4d02dd2691ded8ef2eff

Download Submit
C:\ProgramData\ATM Machine\Explorer.exe

Filesize
2.5MB

MD5
e1c771cceb693ea14bbcde32ac1355fc

SHA1
bc2da06db4b0cc42595b7761ff990e303441cd99

SHA256
70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9

SHA512
fcbb24d7f938145fb82bd6d1d609a4416d78a9285499078ddabf558cac050319bac06c2b6fccdea3ec558e71c5589fb2bc76c6bee6cb4d02dd2691ded8ef2eff

Download Submit
C:\ProgramData\ATM Machine\Explorer.exe

Filesize
2.5MB

MD5
e1c771cceb693ea14bbcde32ac1355fc

SHA1
bc2da06db4b0cc42595b7761ff990e303441cd99

SHA256
70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9

SHA512
fcbb24d7f938145fb82bd6d1d609a4416d78a9285499078ddabf558cac050319bac06c2b6fccdea3ec558e71c5589fb2bc76c6bee6cb4d02dd2691ded8ef2eff

Download Submit
C:\Users\Admin\AppData\Roaming\Kyjsafxspwa\Dgtxdkhrpw.exe

Filesize
2.5MB

MD5
e1c771cceb693ea14bbcde32ac1355fc

SHA1
bc2da06db4b0cc42595b7761ff990e303441cd99

SHA256
70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9

SHA512
fcbb24d7f938145fb82bd6d1d609a4416d78a9285499078ddabf558cac050319bac06c2b6fccdea3ec558e71c5589fb2bc76c6bee6cb4d02dd2691ded8ef2eff

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

Filesize
7KB

MD5
04089e5de5c781bdb6f45117e8ac662e

SHA1
977f71199dbe464dd25faa9cb346b677745e9451

SHA256
315cfc4994bdccca1845f35b9c2ff58cf1de715e0ae88053ae96bc8920a6edbd

SHA512
a9c69c8fa2406894867556d802a807604a3eb53f5a4e623b1bb94fb27425e43b29a1c8f335a2272dd3ad84ac0e86273f1076cb229b92cafb6c1db2195e721503

Download Submit
\ProgramData\ATM Machine\Explorer.exe

Filesize
2.5MB

MD5
e1c771cceb693ea14bbcde32ac1355fc

SHA1
bc2da06db4b0cc42595b7761ff990e303441cd99

SHA256
70a0d6207bf07b9d71452c71fc65c9b8335d2099796d70a25ec6f2a03090daa9

SHA512
fcbb24d7f938145fb82bd6d1d609a4416d78a9285499078ddabf558cac050319bac06c2b6fccdea3ec558e71c5589fb2bc76c6bee6cb4d02dd2691ded8ef2eff

Download Submit
memory/288-85-0x00000000012B0000-0x0000000001542000-memory.dmp

Filesize
2.6MB

Download
memory/532-79-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/532-82-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/532-66-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/532-68-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/532-69-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/532-70-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/532-71-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/532-73-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/532-75-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/532-64-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/532-63-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/860-62-0x0000000005170000-0x00000000051F0000-memory.dmp

Filesize
512KB

Download
memory/860-54-0x00000000013D0000-0x0000000001662000-memory.dmp

Filesize
2.6MB

Download
memory/860-55-0x0000000004B70000-0x0000000004E00000-memory.dmp

Filesize
2.6MB

Download
memory/860-56-0x0000000074DE1000-0x0000000074DE3000-memory.dmp

Filesize
8KB

Download
memory/1832-91-0x000000006F4C0000-0x000000006FA6B000-memory.dmp

Filesize
5.7MB

Download
memory/1832-90-0x000000006F4C0000-0x000000006FA6B000-memory.dmp

Filesize
5.7MB

Download
memory/1832-92-0x000000006F4C0000-0x000000006FA6B000-memory.dmp

Filesize
5.7MB

Download
memory/1900-111-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1900-112-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1900-113-0x0000000000400000-0x0000000000480000-memory.dmp

Filesize
512KB

Download
memory/1964-59-0x000000006F300000-0x000000006F8AB000-memory.dmp

Filesize
5.7MB

Download
memory/1964-60-0x000000006F300000-0x000000006F8AB000-memory.dmp

Filesize
5.7MB

Download
memory/1964-61-0x000000006F300000-0x000000006F8AB000-memory.dmp

Filesize
5.7MB

Download