purecrypter | b5ed033b1ab59838dd5f9abdad008e1fadda3a2fad7220308cf123390c4d882a

General

Target

Xgfawytdsuh.exe
Size

7KB
MD5

1291626bc1a52f6913048b6bae46ea32
SHA1

bdbc938c60af4e16b17accfadf54b31b85bf3ab0
SHA256

b5ed033b1ab59838dd5f9abdad008e1fadda3a2fad7220308cf123390c4d882a
SHA512

90b4393e11f87a02e3d850ee27fadd3a7b2a7f8e632d6f3e8c72963bced6371411269476dc4a16782e109f6acefd052cb15a6c0fdbae53788fbef2e9365e1f86
SSDEEP

96:CiIpKgeeUOobOyO4yfF9eLo/4jtUW5RL07kLLkDkPftlYRzNt:j8w/O4yXeLogjtX5ykLLkYPf0z

Score

10^/10

purecrypter snakekeylogger collection downloader keylogger loader stealer

Malware Config

Extracted

Family

snakekeylogger

C2

https://api.telegram.org/bot5824924248:AAF4WKjJ8FxpNsC2HwCM114EP_g8rFkC4wQ/sendMessage?chat_id=2054148913

Signatures

Detect PureCrypter injector 1 IoCs

loader

Processes:

resource	yara_rule
behavioral1/memory/840-56-0x00000000056F0000-0x000000000575E000-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

Processes:

resource	yara_rule
behavioral1/memory/1576-66-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1576-68-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1576-69-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1576-70-0x00000000004206FE-mapping.dmp	family_snakekeylogger
behavioral1/memory/1576-72-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger
behavioral1/memory/1576-74-0x0000000000400000-0x0000000000426000-memory.dmp	family_snakekeylogger

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.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.

Processes:

flow ioc

9 checkip.dyndns.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

Xgfawytdsuh.exe

description pid process target process

PID 840 set thread context of 1576 840 Xgfawytdsuh.exe MSBuild.exe
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

Processes:

powershell.exeMSBuild.exe

pid process

1680 powershell.exe
1576 MSBuild.exe
1576 MSBuild.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Xgfawytdsuh.exepowershell.exeMSBuild.exe

description pid process

Token: SeDebugPrivilege 840 Xgfawytdsuh.exe
Token: SeDebugPrivilege 1680 powershell.exe
Token: SeDebugPrivilege 1576 MSBuild.exe

flow	ioc
9	checkip.dyndns.org

description	pid	process	target process
PID 840 set thread context of 1576	840	Xgfawytdsuh.exe	MSBuild.exe

pid	process
1680	powershell.exe
1576	MSBuild.exe
1576	MSBuild.exe

description	pid	process
Token: SeDebugPrivilege	840	Xgfawytdsuh.exe
Token: SeDebugPrivilege	1680	powershell.exe
Token: SeDebugPrivilege	1576	MSBuild.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

Xgfawytdsuh.exe

description	pid	process	target process
PID 840 wrote to memory of 1680	840	Xgfawytdsuh.exe	powershell.exe
PID 840 wrote to memory of 1680	840	Xgfawytdsuh.exe	powershell.exe
PID 840 wrote to memory of 1680	840	Xgfawytdsuh.exe	powershell.exe
PID 840 wrote to memory of 1680	840	Xgfawytdsuh.exe	powershell.exe
PID 840 wrote to memory of 1576	840	Xgfawytdsuh.exe	MSBuild.exe
PID 840 wrote to memory of 1576	840	Xgfawytdsuh.exe	MSBuild.exe
PID 840 wrote to memory of 1576	840	Xgfawytdsuh.exe	MSBuild.exe
PID 840 wrote to memory of 1576	840	Xgfawytdsuh.exe	MSBuild.exe
PID 840 wrote to memory of 1576	840	Xgfawytdsuh.exe	MSBuild.exe
PID 840 wrote to memory of 1576	840	Xgfawytdsuh.exe	MSBuild.exe
PID 840 wrote to memory of 1576	840	Xgfawytdsuh.exe	MSBuild.exe
PID 840 wrote to memory of 1576	840	Xgfawytdsuh.exe	MSBuild.exe
PID 840 wrote to memory of 1576	840	Xgfawytdsuh.exe	MSBuild.exe

outlook_office_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\Xgfawytdsuh.exe
"C:\Users\Admin\AppData\Local\Temp\Xgfawytdsuh.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:840

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:1680

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
2⤵
- Accesses Microsoft Outlook profiles
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- outlook_office_path
- outlook_win_path
PID:1576

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

memory/840-54-0x0000000000920000-0x0000000000928000-memory.dmp

Filesize
32KB

Download
memory/840-55-0x0000000075A91000-0x0000000075A93000-memory.dmp

Filesize
8KB

Download
memory/840-56-0x00000000056F0000-0x000000000575E000-memory.dmp

Filesize
440KB

Download
memory/840-57-0x0000000005A50000-0x0000000005AE2000-memory.dmp

Filesize
584KB

Download
memory/1576-69-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1576-63-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1576-64-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1576-66-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1576-68-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1576-70-0x00000000004206FE-mapping.dmp

Download
memory/1576-72-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1576-74-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/1680-60-0x000000006DCF0000-0x000000006E29B000-memory.dmp

Filesize
5.7MB

Download
memory/1680-61-0x000000006DCF0000-0x000000006E29B000-memory.dmp

Filesize
5.7MB

Download
memory/1680-62-0x000000006DCF0000-0x000000006E29B000-memory.dmp

Filesize
5.7MB

Download
memory/1680-58-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads