purecrypter | fadc70c73f31f1cd2982bcf510846c09a9ddb209cce4e84d6237803fba50f58b

General

Target

Ymplhchis.exe
Size

9KB
MD5

66b64cfac83171e194dda651b97aeef0
SHA1

cc65aabb69e797a01c2c06886d523683fc756c19
SHA256

fadc70c73f31f1cd2982bcf510846c09a9ddb209cce4e84d6237803fba50f58b
SHA512

c162987ad139ea66152b3c31a13b8f67d8cf20fc0eac420dd6dea58eefd183ec94a8de6af30be53130f5f7cbc1aca5cb6ce665e362ce145e8eaec59be1cb5bd2
SSDEEP

192:r7IRHVefS0loC4cge45pz/7H/hShLTG1sl/pv6:r7i1efFp4R95B/r/hShLy6hy

Score

10^/10

purecrypter snakekeylogger collection downloader keylogger loader stealer

Malware Config

Extracted

Family

purecrypter

C2

https://cdn.discordapp.com/attachments/1114088016076619870/1114091109027688478/Ojjkmeqsy.dat

Extracted

Family

snakekeylogger

C2

https://api.telegram.org/bot5996089921:AAFFEnbgTY8Gt8G5jJy6llKhDg_Ha193t7c/sendMessage?chat_id=2054148913

Signatures

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 3 IoCs

resource	yara_rule
behavioral1/memory/1644-74-0x0000000140000000-0x0000000140024000-memory.dmp	family_snakekeylogger
behavioral1/memory/1644-76-0x0000000140000000-0x0000000140024000-memory.dmp	family_snakekeylogger
behavioral1/memory/1644-79-0x000000001C050000-0x000000001C0D0000-memory.dmp	family_snakekeylogger

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\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.

flow	ioc
7	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2032 set thread context of 1644	2032	Ymplhchis.exe	30

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

T1130

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474	Ymplhchis.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D4DE20D05E66FC53FE1A50882C78DB2852CAE474\Blob = 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	Ymplhchis.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
648	powershell.exe
1644	MSBuild.exe
1644	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2032	Ymplhchis.exe
Token: SeDebugPrivilege	648	powershell.exe
Token: SeDebugPrivilege	1644	MSBuild.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2032 wrote to memory of 648	2032	Ymplhchis.exe	28
PID 2032 wrote to memory of 648	2032	Ymplhchis.exe	28
PID 2032 wrote to memory of 648	2032	Ymplhchis.exe	28
PID 2032 wrote to memory of 1644	2032	Ymplhchis.exe	30
PID 2032 wrote to memory of 1644	2032	Ymplhchis.exe	30
PID 2032 wrote to memory of 1644	2032	Ymplhchis.exe	30
PID 2032 wrote to memory of 1644	2032	Ymplhchis.exe	30
PID 2032 wrote to memory of 1644	2032	Ymplhchis.exe	30
PID 2032 wrote to memory of 1644	2032	Ymplhchis.exe	30
PID 2032 wrote to memory of 1644	2032	Ymplhchis.exe	30

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-2647223082-2067913677-935928954-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\Ymplhchis.exe
"C:\Users\Admin\AppData\Local\Temp\Ymplhchis.exe"
1⤵
- Suspicious use of SetThreadContext
- Modifies system certificate store
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2032
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:648
- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:1644

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Install Root Certificate

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

memory/648-70-0x0000000002330000-0x00000000023B0000-memory.dmp

Filesize
512KB

Download
memory/648-69-0x0000000002330000-0x00000000023B0000-memory.dmp

Filesize
512KB

Download
memory/648-66-0x0000000002330000-0x00000000023B0000-memory.dmp

Filesize
512KB

Download
memory/648-67-0x0000000002330000-0x00000000023B0000-memory.dmp

Filesize
512KB

Download
memory/648-68-0x0000000002330000-0x00000000023B0000-memory.dmp

Filesize
512KB

Download
memory/648-63-0x0000000002330000-0x00000000023B0000-memory.dmp

Filesize
512KB

Download
memory/648-64-0x000000001B040000-0x000000001B322000-memory.dmp

Filesize
2.9MB

Download
memory/648-65-0x0000000001F40000-0x0000000001F48000-memory.dmp

Filesize
32KB

Download
memory/1644-79-0x000000001C050000-0x000000001C0D0000-memory.dmp

Filesize
512KB

Download
memory/1644-72-0x0000000140000000-0x0000000140024000-memory.dmp

Filesize
144KB

Download
memory/1644-73-0x0000000140000000-0x0000000140024000-memory.dmp

Filesize
144KB

Download
memory/1644-74-0x0000000140000000-0x0000000140024000-memory.dmp

Filesize
144KB

Download
memory/1644-75-0x000007FFFFFD8000-0x000007FFFFFD9000-memory.dmp

Filesize
4KB

Download
memory/1644-76-0x0000000140000000-0x0000000140024000-memory.dmp

Filesize
144KB

Download
memory/2032-55-0x000000001B290000-0x000000001B310000-memory.dmp

Filesize
512KB

Download
memory/2032-56-0x000000001E810000-0x000000001E904000-memory.dmp

Filesize
976KB

Download
memory/2032-58-0x000000001A880000-0x000000001A912000-memory.dmp

Filesize
584KB

Download
memory/2032-54-0x0000000001000000-0x0000000001006000-memory.dmp

Filesize
24KB

Download
memory/2032-57-0x00000000007B0000-0x00000000007C0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads