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 1 IoCs

resource	yara_rule
behavioral2/memory/4064-155-0x0000000140000000-0x0000000140024000-memory.dmp	family_snakekeylogger

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Control Panel\International\Geo\Nation	Ymplhchis.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\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
30	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4608 set thread context of 4064	4608	Ymplhchis.exe	88

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3300	powershell.exe
3300	powershell.exe
4064	MSBuild.exe
4064	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	4608	Ymplhchis.exe
Token: SeDebugPrivilege	3300	powershell.exe
Token: SeDebugPrivilege	4064	MSBuild.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4608 wrote to memory of 3300	4608	Ymplhchis.exe	79
PID 4608 wrote to memory of 3300	4608	Ymplhchis.exe	79
PID 4608 wrote to memory of 4064	4608	Ymplhchis.exe	88
PID 4608 wrote to memory of 4064	4608	Ymplhchis.exe	88
PID 4608 wrote to memory of 4064	4608	Ymplhchis.exe	88
PID 4608 wrote to memory of 4064	4608	Ymplhchis.exe	88
PID 4608 wrote to memory of 4064	4608	Ymplhchis.exe	88
PID 4608 wrote to memory of 4064	4608	Ymplhchis.exe	88

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\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⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4608
- 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:3300
- 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:4064

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_w2wzlbk2.vs3.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3300-147-0x0000022C3B3F0000-0x0000022C3B400000-memory.dmp

Filesize
64KB

Download
memory/3300-149-0x0000022C3B3F0000-0x0000022C3B400000-memory.dmp

Filesize
64KB

Download
memory/3300-151-0x0000022C3B3F0000-0x0000022C3B400000-memory.dmp

Filesize
64KB

Download
memory/3300-145-0x0000022C3B3F0000-0x0000022C3B400000-memory.dmp

Filesize
64KB

Download
memory/3300-146-0x0000022C3B3F0000-0x0000022C3B400000-memory.dmp

Filesize
64KB

Download
memory/3300-150-0x0000022C3B3F0000-0x0000022C3B400000-memory.dmp

Filesize
64KB

Download
memory/4064-155-0x0000000140000000-0x0000000140024000-memory.dmp

Filesize
144KB

Download
memory/4064-157-0x00000201363B0000-0x00000201363C0000-memory.dmp

Filesize
64KB

Download
memory/4064-158-0x00000201508F0000-0x0000020150AB2000-memory.dmp

Filesize
1.8MB

Download
memory/4064-159-0x00000201363B0000-0x00000201363C0000-memory.dmp

Filesize
64KB

Download
memory/4608-148-0x0000000002610000-0x0000000002620000-memory.dmp

Filesize
64KB

Download
memory/4608-135-0x00000000026B0000-0x00000000026D2000-memory.dmp

Filesize
136KB

Download
memory/4608-133-0x0000000000540000-0x0000000000546000-memory.dmp

Filesize
24KB

Download
memory/4608-134-0x0000000002610000-0x0000000002620000-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