purecrypter | 36ccb94aa071489c4f03b72cd09c2560e40d66e541e006b5f6ca1b6e84ef2e1a

General

Target

tmp77EA.tmp.exe
Size

2.3MB
MD5

1d85c4d35f557fbbde158258300b753f
SHA1

1a0f596ee4f5abdb3dc3bad8a1247625fce982ea
SHA256

36ccb94aa071489c4f03b72cd09c2560e40d66e541e006b5f6ca1b6e84ef2e1a
SHA512

09aa7748f392dd2104672e4f774d717298659bb6df21db51de8455e01dba0ee0d5761ecf7cf5bd24eaae80943b91ed4ab189d1e1a0df9621636bb33a2e2cdd52
SSDEEP

49152:Vg9FpS1fbJT9VhpwKxh5ors6lz1u1M6s1V2hcCudLP1FqDfk:S9FpYJT9pw+2sMz1u1M6s/2HIPjqDc

Score

10^/10

purecrypter redline redline discovery downloader infostealer loader spyware stealer

Malware Config

Extracted

Family

redline

Botnet

redline

C2

79.137.133.225:25999

Attributes

auth_value
38284dbf15da9b4a9eaee0ef0d2b343f

Signatures

Detect PureCrypter injector 1 IoCs

loader

Processes:

resource	yara_rule
behavioral1/memory/1500-55-0x00000000049D0000-0x0000000004C2C000-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
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

Processes:

tmp77EA.tmp.exe

description pid process target process

PID 1500 set thread context of 1544 1500 tmp77EA.tmp.exe tmp77EA.tmp.exe
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 3 IoCs

Processes:

powershell.exetmp77EA.tmp.exe

pid process

516 powershell.exe
1544 tmp77EA.tmp.exe
1544 tmp77EA.tmp.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

tmp77EA.tmp.exepowershell.exetmp77EA.tmp.exe

description pid process

Token: SeDebugPrivilege 1500 tmp77EA.tmp.exe
Token: SeDebugPrivilege 516 powershell.exe
Token: SeDebugPrivilege 1544 tmp77EA.tmp.exe

description	pid	process	target process
PID 1500 set thread context of 1544	1500	tmp77EA.tmp.exe	tmp77EA.tmp.exe

pid	process
516	powershell.exe
1544	tmp77EA.tmp.exe
1544	tmp77EA.tmp.exe

description	pid	process
Token: SeDebugPrivilege	1500	tmp77EA.tmp.exe
Token: SeDebugPrivilege	516	powershell.exe
Token: SeDebugPrivilege	1544	tmp77EA.tmp.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

tmp77EA.tmp.exe

description	pid	process	target process
PID 1500 wrote to memory of 516	1500	tmp77EA.tmp.exe	powershell.exe
PID 1500 wrote to memory of 516	1500	tmp77EA.tmp.exe	powershell.exe
PID 1500 wrote to memory of 516	1500	tmp77EA.tmp.exe	powershell.exe
PID 1500 wrote to memory of 516	1500	tmp77EA.tmp.exe	powershell.exe
PID 1500 wrote to memory of 1544	1500	tmp77EA.tmp.exe	tmp77EA.tmp.exe
PID 1500 wrote to memory of 1544	1500	tmp77EA.tmp.exe	tmp77EA.tmp.exe
PID 1500 wrote to memory of 1544	1500	tmp77EA.tmp.exe	tmp77EA.tmp.exe
PID 1500 wrote to memory of 1544	1500	tmp77EA.tmp.exe	tmp77EA.tmp.exe
PID 1500 wrote to memory of 1544	1500	tmp77EA.tmp.exe	tmp77EA.tmp.exe
PID 1500 wrote to memory of 1544	1500	tmp77EA.tmp.exe	tmp77EA.tmp.exe
PID 1500 wrote to memory of 1544	1500	tmp77EA.tmp.exe	tmp77EA.tmp.exe
PID 1500 wrote to memory of 1544	1500	tmp77EA.tmp.exe	tmp77EA.tmp.exe
PID 1500 wrote to memory of 1544	1500	tmp77EA.tmp.exe	tmp77EA.tmp.exe

C:\Users\Admin\AppData\Local\Temp\tmp77EA.tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp77EA.tmp.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1500

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:516

C:\Users\Admin\AppData\Local\Temp\tmp77EA.tmp.exe
C:\Users\Admin\AppData\Local\Temp\tmp77EA.tmp.exe
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1544

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

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

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/516-57-0x0000000000000000-mapping.dmp

Download
memory/516-59-0x000000006F900000-0x000000006FEAB000-memory.dmp

Filesize
5.7MB

Download
memory/516-60-0x000000006F900000-0x000000006FEAB000-memory.dmp

Filesize
5.7MB

Download
memory/516-61-0x000000006F900000-0x000000006FEAB000-memory.dmp

Filesize
5.7MB

Download
memory/1500-54-0x0000000000D90000-0x0000000000FEE000-memory.dmp

Filesize
2.4MB

Download
memory/1500-55-0x00000000049D0000-0x0000000004C2C000-memory.dmp

Filesize
2.4MB

Download
memory/1500-56-0x0000000075D71000-0x0000000075D73000-memory.dmp

Filesize
8KB

Download
memory/1500-62-0x00000000047D0000-0x000000000481C000-memory.dmp

Filesize
304KB

Download
memory/1544-63-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1544-66-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1544-64-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1544-68-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1544-70-0x000000000041B59A-mapping.dmp

Download
memory/1544-69-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1544-72-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download
memory/1544-74-0x0000000000400000-0x0000000000432000-memory.dmp

Filesize
200KB

Download

Analysis

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