purecrypter | d6edf57c2ec790e7a97ddffc9243ebf29960c497822385bca0420fa940581e07

General

Target

27099b00b5e7e72839edba8e085931e2.exe
Size

7KB
MD5

27099b00b5e7e72839edba8e085931e2
SHA1

a5fc5b9271e1a3022b2549d8aa8384ec0236db89
SHA256

d6edf57c2ec790e7a97ddffc9243ebf29960c497822385bca0420fa940581e07
SHA512

d485cd0a34f63e7abdf7733d7da37fc1d1c0a1b230560a81102e4bcd9616d2dd064aff90fbce0aa5e0239bb420672472208f88dab2dd9b9a15f39ce0b0f50bb1
SSDEEP

96:Et0ogZlyT+BAwP514Y1GXb9/RT0Gk7/4zNt:EuoPCxuO+v0rza

Score

10^/10

purecrypter redline cyou 2-4 discovery downloader infostealer loader persistence spyware stealer

Malware Config

Extracted

Family

redline

Botnet

cyou 2-4

C2

178.20.45.6:19170

Attributes

auth_value
5e78725a66859191f94d71c99a9cd5a3

Signatures

Detect PureCrypter injector 1 IoCs

loader

resource	yara_rule
behavioral1/memory/1752-56-0x00000000073C0000-0x000000000762A000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
RedLine
RedLine Stealer is a malware family written in C#, first appearing in early 2020.
infostealer redline
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
spyware

Data from Local System
T1005

Credentials in Files
T1081

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows\CurrentVersion\Run\QQ安全防护盾（Q盾） = "\"C:\\Users\\Admin\\AppData\\Roaming\\Tencent\\QQ安全防护盾（Q盾）.exe\""	27099b00b5e7e72839edba8e085931e2.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1752 set thread context of 316	1752	27099b00b5e7e72839edba8e085931e2.exe	28

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

pid	Process
1932	powershell.exe
316	27099b00b5e7e72839edba8e085931e2.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1752	27099b00b5e7e72839edba8e085931e2.exe
Token: SeDebugPrivilege	1932	powershell.exe
Token: SeDebugPrivilege	316	27099b00b5e7e72839edba8e085931e2.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 1752 wrote to memory of 1932	1752	27099b00b5e7e72839edba8e085931e2.exe	26
PID 1752 wrote to memory of 1932	1752	27099b00b5e7e72839edba8e085931e2.exe	26
PID 1752 wrote to memory of 1932	1752	27099b00b5e7e72839edba8e085931e2.exe	26
PID 1752 wrote to memory of 1932	1752	27099b00b5e7e72839edba8e085931e2.exe	26
PID 1752 wrote to memory of 316	1752	27099b00b5e7e72839edba8e085931e2.exe	28
PID 1752 wrote to memory of 316	1752	27099b00b5e7e72839edba8e085931e2.exe	28
PID 1752 wrote to memory of 316	1752	27099b00b5e7e72839edba8e085931e2.exe	28
PID 1752 wrote to memory of 316	1752	27099b00b5e7e72839edba8e085931e2.exe	28
PID 1752 wrote to memory of 316	1752	27099b00b5e7e72839edba8e085931e2.exe	28
PID 1752 wrote to memory of 316	1752	27099b00b5e7e72839edba8e085931e2.exe	28
PID 1752 wrote to memory of 316	1752	27099b00b5e7e72839edba8e085931e2.exe	28
PID 1752 wrote to memory of 316	1752	27099b00b5e7e72839edba8e085931e2.exe	28
PID 1752 wrote to memory of 316	1752	27099b00b5e7e72839edba8e085931e2.exe	28

C:\Users\Admin\AppData\Local\Temp\27099b00b5e7e72839edba8e085931e2.exe
"C:\Users\Admin\AppData\Local\Temp\27099b00b5e7e72839edba8e085931e2.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1752
- 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:1932
- C:\Users\Admin\AppData\Local\Temp\27099b00b5e7e72839edba8e085931e2.exe
  C:\Users\Admin\AppData\Local\Temp\27099b00b5e7e72839edba8e085931e2.exe
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:316

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Credentials in Files

2

T1081

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

2

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/316-69-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/316-66-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/316-74-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/316-72-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/316-68-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/316-63-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/316-64-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1752-55-0x0000000076681000-0x0000000076683000-memory.dmp

Filesize
8KB

Download
memory/1752-62-0x0000000004DE0000-0x0000000004E2C000-memory.dmp

Filesize
304KB

Download
memory/1752-54-0x0000000001290000-0x0000000001298000-memory.dmp

Filesize
32KB

Download
memory/1752-56-0x00000000073C0000-0x000000000762A000-memory.dmp

Filesize
2.4MB

Download
memory/1932-61-0x000000006F490000-0x000000006FA3B000-memory.dmp

Filesize
5.7MB

Download
memory/1932-60-0x000000006F490000-0x000000006FA3B000-memory.dmp

Filesize
5.7MB

Download
memory/1932-59-0x000000006F490000-0x000000006FA3B000-memory.dmp

Filesize
5.7MB

Download

Analysis

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