purecrypter | dd218eb78e26587e43df5f00ff3ad87e23154c672615309a193a657323b62e20

Analysis

max time kernel
83s
max time network
33s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
05-02-2023 16:04

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General

Target

tmp.exe
Size

3.0MB
MD5

cdb75538c7adc7829a93cdf9a27c1fd7
SHA1

2e5ff4e8f2b4b087ccc7f4cb2ad59d4c3617a0c9
SHA256

dd218eb78e26587e43df5f00ff3ad87e23154c672615309a193a657323b62e20
SHA512

f6eab79f9ba0111608ddc3b81b57224e5ccc86f2a4b3f14a11ef627a2d44f6539c061d5bcad7a68f7df0c05bbcb14d0285bfa508085233075452a3a75d1671d4
SSDEEP

98304:k5Sh7zrcGtirr9gIKvvwPDxISVNImdJ3R9/4:WAXrjtirrGIyYTD3R9A

Score

10^/10

purecrypter downloader loader

Malware Config

Signatures

Detect PureCrypter injector 1 IoCs

loader

Processes:

resource	yara_rule
behavioral1/memory/940-55-0x00000000201B0000-0x0000000020496000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
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 2 IoCs

Processes:

powershell.exetmp.exe

pid process

580 powershell.exe
940 tmp.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

tmp.exepowershell.exe

description pid process

Token: SeDebugPrivilege 940 tmp.exe
Token: SeDebugPrivilege 580 powershell.exe
Token: SeDebugPrivilege 940 tmp.exe

pid	process
580	powershell.exe
940	tmp.exe

description	pid	process
Token: SeDebugPrivilege	940	tmp.exe
Token: SeDebugPrivilege	580	powershell.exe
Token: SeDebugPrivilege	940	tmp.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

tmp.exe

description	pid	process	target process
PID 940 wrote to memory of 580	940	tmp.exe	powershell.exe
PID 940 wrote to memory of 580	940	tmp.exe	powershell.exe
PID 940 wrote to memory of 580	940	tmp.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:940

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAANgA1AA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:580

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/580-64-0x000000000282B000-0x000000000284A000-memory.dmp

Filesize
124KB

Download
memory/580-61-0x0000000002824000-0x0000000002827000-memory.dmp

Filesize
12KB

Download
memory/580-56-0x0000000000000000-mapping.dmp

Download
memory/580-57-0x000007FEFC4E1000-0x000007FEFC4E3000-memory.dmp

Filesize
8KB

Download
memory/580-62-0x000000000282B000-0x000000000284A000-memory.dmp

Filesize
124KB

Download
memory/580-59-0x000007FEED340000-0x000007FEEDD63000-memory.dmp

Filesize
10.1MB

Download
memory/580-60-0x000007FEEC7E0000-0x000007FEED33D000-memory.dmp

Filesize
11.4MB

Download
memory/580-63-0x0000000002824000-0x0000000002827000-memory.dmp

Filesize
12KB

Download
memory/940-71-0x000000001C650000-0x000000001C69C000-memory.dmp

Filesize
304KB

Download
memory/940-55-0x00000000201B0000-0x0000000020496000-memory.dmp

Filesize
2.9MB

Download
memory/940-73-0x0000000002547000-0x0000000002566000-memory.dmp

Filesize
124KB

Download
memory/940-65-0x000000001BF00000-0x000000001BFD6000-memory.dmp

Filesize
856KB

Download
memory/940-66-0x000000001C090000-0x000000001C12B000-memory.dmp

Filesize
620KB

Download
memory/940-67-0x000000001C6F0000-0x000000001C788000-memory.dmp

Filesize
608KB

Download
memory/940-68-0x000000001D900000-0x000000001D9B4000-memory.dmp

Filesize
720KB

Download
memory/940-69-0x000000001BDF0000-0x000000001BE46000-memory.dmp

Filesize
344KB

Download
memory/940-70-0x000000001C1D0000-0x000000001C224000-memory.dmp

Filesize
336KB

Download
memory/940-54-0x000000013FD50000-0x0000000140056000-memory.dmp

Filesize
3.0MB

Download
memory/940-72-0x000000001C840000-0x000000001C894000-memory.dmp

Filesize
336KB

Download
memory/940-58-0x0000000002547000-0x0000000002566000-memory.dmp

Filesize
124KB

Download