purecrypter | 47a98390d2ac2a88d7853877e3c2f1d3253f90a0bb0f61b37570294e00a1107f

General

Target

INQUIRY - TENDER RFx-2172200126 .exe
Size

4.8MB
MD5

496c2794aefc720bc71fd57c5ddc13a7
SHA1

324d529b527c343695ffd4ce94abde0dd29252c3
SHA256

47a98390d2ac2a88d7853877e3c2f1d3253f90a0bb0f61b37570294e00a1107f
SHA512

188580c71d8885e257346bd2f6ac8f55aa9fc80c498cd0b5de1252ce36f3e4bf4c6f8f46f4b87a3ecec1c69ae4d54b2a5c8b7020b87eb92875c889719ae453d1
SSDEEP

24576:50Mwg7OQcjsDvuvkxDaQ9vSmR7d7lacOJuJ6Exgd5Hf2icQaux8:

Score

10^/10

purecrypter snakekeylogger collection downloader keylogger loader persistence spyware stealer

Malware Config

Extracted

Family

snakekeylogger

Credentials

Protocol: ftp
Host:
ftp://ftp.cleaningagent.xyz/
Port:
21
Username:
[email protected]
Password:
9L4dBJBZ,kIQ

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/1668-55-0x0000000005240000-0x00000000054B0000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Snake Keylogger
Keylogger and Infostealer first seen in November 2020.
stealer keylogger snakekeylogger

Snake Keylogger payload 6 IoCs

resource	yara_rule
behavioral1/memory/988-67-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/988-65-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/988-68-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/988-69-0x00000000004206EE-mapping.dmp	family_snakekeylogger
behavioral1/memory/988-71-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/988-73-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	INQUIRY - TENDER RFx-2172200126 .exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	INQUIRY - TENDER RFx-2172200126 .exe
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	INQUIRY - TENDER RFx-2172200126 .exe

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-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows\CurrentVersion\Run\Zzycvoloo = "\"C:\\Users\\Admin\\AppData\\Roaming\\Nqtsofal\\Zzycvoloo.exe\""	INQUIRY - TENDER RFx-2172200126 .exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
3	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1668 set thread context of 988	1668	INQUIRY - TENDER RFx-2172200126 .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 3 IoCs

pid	Process
1112	powershell.exe
988	INQUIRY - TENDER RFx-2172200126 .exe
988	INQUIRY - TENDER RFx-2172200126 .exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1668	INQUIRY - TENDER RFx-2172200126 .exe
Token: SeDebugPrivilege	1112	powershell.exe
Token: SeDebugPrivilege	988	INQUIRY - TENDER RFx-2172200126 .exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1668 wrote to memory of 1112	1668	INQUIRY - TENDER RFx-2172200126 .exe	28
PID 1668 wrote to memory of 1112	1668	INQUIRY - TENDER RFx-2172200126 .exe	28
PID 1668 wrote to memory of 1112	1668	INQUIRY - TENDER RFx-2172200126 .exe	28
PID 1668 wrote to memory of 1112	1668	INQUIRY - TENDER RFx-2172200126 .exe	28
PID 1668 wrote to memory of 988	1668	INQUIRY - TENDER RFx-2172200126 .exe	30
PID 1668 wrote to memory of 988	1668	INQUIRY - TENDER RFx-2172200126 .exe	30
PID 1668 wrote to memory of 988	1668	INQUIRY - TENDER RFx-2172200126 .exe	30
PID 1668 wrote to memory of 988	1668	INQUIRY - TENDER RFx-2172200126 .exe	30
PID 1668 wrote to memory of 988	1668	INQUIRY - TENDER RFx-2172200126 .exe	30
PID 1668 wrote to memory of 988	1668	INQUIRY - TENDER RFx-2172200126 .exe	30
PID 1668 wrote to memory of 988	1668	INQUIRY - TENDER RFx-2172200126 .exe	30
PID 1668 wrote to memory of 988	1668	INQUIRY - TENDER RFx-2172200126 .exe	30
PID 1668 wrote to memory of 988	1668	INQUIRY - TENDER RFx-2172200126 .exe	30

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	INQUIRY - TENDER RFx-2172200126 .exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-3845472200-3839195424-595303356-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	INQUIRY - TENDER RFx-2172200126 .exe

C:\Users\Admin\AppData\Local\Temp\INQUIRY - TENDER RFx-2172200126 .exe
"C:\Users\Admin\AppData\Local\Temp\INQUIRY - TENDER RFx-2172200126 .exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1668
- 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:1112
- C:\Users\Admin\AppData\Local\Temp\INQUIRY - TENDER RFx-2172200126 .exe
  "C:\Users\Admin\AppData\Local\Temp\INQUIRY - TENDER RFx-2172200126 .exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:988

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

Credentials in Files

3

T1081

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/988-68-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/988-65-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/988-73-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/988-71-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/988-62-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/988-63-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/988-67-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1112-60-0x000000006FA00000-0x000000006FFAB000-memory.dmp

Filesize
5.7MB

Download
memory/1112-59-0x000000006FA00000-0x000000006FFAB000-memory.dmp

Filesize
5.7MB

Download
memory/1112-58-0x000000006FA00000-0x000000006FFAB000-memory.dmp

Filesize
5.7MB

Download
memory/1112-57-0x0000000075241000-0x0000000075243000-memory.dmp

Filesize
8KB

Download
memory/1668-55-0x0000000005240000-0x00000000054B0000-memory.dmp

Filesize
2.4MB

Download
memory/1668-61-0x00000000025A0000-0x00000000025EA000-memory.dmp

Filesize
296KB

Download
memory/1668-54-0x0000000000930000-0x0000000000E0A000-memory.dmp

Filesize
4.9MB

Download

Analysis

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