purecrypter | c1c2c7f68cd6257da48226477b7be1b3d82b9f6ee7b1e421b7b9d5191f89c8c6

General

Target

tmp.exe
Size

159KB
MD5

2c8ecd01029e296bf5c6b743e07bcc8d
SHA1

98534bd6d5c08cf14734a63713d930e12f69c5f0
SHA256

c1c2c7f68cd6257da48226477b7be1b3d82b9f6ee7b1e421b7b9d5191f89c8c6
SHA512

983590ed6f4aacd9f80142b60f4f64627a2f639ccda9c32b3c6260caad10f0fd667cd0c5cc93dc26ace5c5c6b1a84b4e8a27623bba873bf15f81537e64889726
SSDEEP

768:CM9Cr+M0fV7RW1JbUGmp7NxryR27zAFEzD/xworhF:CM92e7RAJu7vryR2XSWwOhF

Score

10^/10

purecrypter snakekeylogger collection downloader keylogger loader stealer

Malware Config

Extracted

Family

purecrypter

C2

http://192.3.26.135/uo/Ksagb.png

Extracted

Family

snakekeylogger

Credentials

Protocol: smtp
Host:
us2.smtp.mailhostbox.com
Port:
587
Username:
[email protected]
Password:
doDHyw%0
Email To:
[email protected]

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/2852-166-0x0000000000400000-0x0000000000426000-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	tmp.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
42	checkip.dyndns.org

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1272 set thread context of 2852	1272	tmp.exe	95

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 7 IoCs

pid	Process
3976	powershell.exe
3976	powershell.exe
1272	tmp.exe
1272	tmp.exe
1272	tmp.exe
1272	tmp.exe
2852	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1272	tmp.exe
Token: SeDebugPrivilege	3976	powershell.exe
Token: SeDebugPrivilege	2852	MSBuild.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 1272 wrote to memory of 3976	1272	tmp.exe	87
PID 1272 wrote to memory of 3976	1272	tmp.exe	87
PID 1272 wrote to memory of 3976	1272	tmp.exe	87
PID 1272 wrote to memory of 3688	1272	tmp.exe	93
PID 1272 wrote to memory of 3688	1272	tmp.exe	93
PID 1272 wrote to memory of 3688	1272	tmp.exe	93
PID 1272 wrote to memory of 3904	1272	tmp.exe	94
PID 1272 wrote to memory of 3904	1272	tmp.exe	94
PID 1272 wrote to memory of 3904	1272	tmp.exe	94
PID 1272 wrote to memory of 2852	1272	tmp.exe	95
PID 1272 wrote to memory of 2852	1272	tmp.exe	95
PID 1272 wrote to memory of 2852	1272	tmp.exe	95
PID 1272 wrote to memory of 2852	1272	tmp.exe	95
PID 1272 wrote to memory of 2852	1272	tmp.exe	95
PID 1272 wrote to memory of 2852	1272	tmp.exe	95
PID 1272 wrote to memory of 2852	1272	tmp.exe	95
PID 1272 wrote to memory of 2852	1272	tmp.exe	95

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\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1272
- 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:3976
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  PID:3688
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
  2⤵
  PID:3904
- 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:2852

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_qvyshflp.dix.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1272-134-0x0000000005B80000-0x0000000006124000-memory.dmp

Filesize
5.6MB

Download
memory/1272-135-0x0000000005670000-0x0000000005702000-memory.dmp

Filesize
584KB

Download
memory/1272-136-0x0000000005660000-0x0000000005670000-memory.dmp

Filesize
64KB

Download
memory/1272-137-0x0000000005640000-0x000000000564A000-memory.dmp

Filesize
40KB

Download
memory/1272-138-0x0000000007560000-0x0000000007582000-memory.dmp

Filesize
136KB

Download
memory/1272-158-0x0000000005660000-0x0000000005670000-memory.dmp

Filesize
64KB

Download
memory/1272-133-0x0000000000C60000-0x0000000000C8E000-memory.dmp

Filesize
184KB

Download
memory/2852-171-0x00000000057E0000-0x00000000057F0000-memory.dmp

Filesize
64KB

Download
memory/2852-168-0x00000000055E0000-0x000000000567C000-memory.dmp

Filesize
624KB

Download
memory/2852-169-0x00000000057E0000-0x00000000057F0000-memory.dmp

Filesize
64KB

Download
memory/2852-166-0x0000000000400000-0x0000000000426000-memory.dmp

Filesize
152KB

Download
memory/2852-170-0x0000000006620000-0x00000000067E2000-memory.dmp

Filesize
1.8MB

Download
memory/3976-154-0x0000000004E50000-0x0000000004E60000-memory.dmp

Filesize
64KB

Download
memory/3976-155-0x0000000004E50000-0x0000000004E60000-memory.dmp

Filesize
64KB

Download
memory/3976-156-0x00000000078B0000-0x0000000007F2A000-memory.dmp

Filesize
6.5MB

Download
memory/3976-157-0x0000000006760000-0x000000000677A000-memory.dmp

Filesize
104KB

Download
memory/3976-153-0x0000000004E50000-0x0000000004E60000-memory.dmp

Filesize
64KB

Download
memory/3976-159-0x0000000004E50000-0x0000000004E60000-memory.dmp

Filesize
64KB

Download
memory/3976-160-0x0000000004E50000-0x0000000004E60000-memory.dmp

Filesize
64KB

Download
memory/3976-161-0x0000000004E50000-0x0000000004E60000-memory.dmp

Filesize
64KB

Download
memory/3976-152-0x0000000006260000-0x000000000627E000-memory.dmp

Filesize
120KB

Download
memory/3976-142-0x0000000005340000-0x00000000053A6000-memory.dmp

Filesize
408KB

Download
memory/3976-141-0x00000000052D0000-0x0000000005336000-memory.dmp

Filesize
408KB

Download
memory/3976-140-0x0000000005490000-0x0000000005AB8000-memory.dmp

Filesize
6.2MB

Download
memory/3976-139-0x0000000002C20000-0x0000000002C56000-memory.dmp

Filesize
216KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads