purecrypter | d0b7c72da05449ada1b7a75b481989922f634b33e5bc1648b837698853abb8f5

General

Target

tmp.exe
Size

41KB
MD5

9fc2e4d640bbce8bc3fa4a6f0f01984d
SHA1

52c52532478b1f07e9c74dcd3923a0f23d24406a
SHA256

d0b7c72da05449ada1b7a75b481989922f634b33e5bc1648b837698853abb8f5
SHA512

533bbbeafb0714a5781056d416b61446f7c2075b0d2e5286a96c00393d4499e95dd48853615b4918aba8b95aa0c0e7849a12a521a0f7d202661b39c9e385c4c4
SSDEEP

768:Af/0u9flwYtttWtYtYBtYtxqGGGGGGGGHGGGGGGGGGGGGGGGGGGGGGGGGGGGGUut:E3uGGGGGGGGHGGGGGGGGGGGGGGGGGGG

Score

10^/10

purecrypter xmrig downloader loader miner persistence

Malware Config

Extracted

Family

purecrypter

C2

http://163.123.142.210/Cjhgcjqheh.png

Signatures

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
xmrig
XMRig is a high performance, open source, cross platform CPU/GPU miner.
miner xmrig

XMRig Miner payload 8 IoCs

miner

Processes:

resource	yara_rule
behavioral2/memory/3108-146-0x0000000140000000-0x0000000140809000-memory.dmp	xmrig
behavioral2/memory/3108-147-0x000000014036EAC4-mapping.dmp	xmrig
behavioral2/memory/3108-149-0x0000000140000000-0x0000000140809000-memory.dmp	xmrig
behavioral2/memory/2460-152-0x000000014036EAC4-mapping.dmp	xmrig
behavioral2/memory/2460-153-0x0000000140000000-0x0000000140809000-memory.dmp	xmrig
behavioral2/memory/3108-154-0x0000000140000000-0x0000000140809000-memory.dmp	xmrig
behavioral2/memory/2460-155-0x0000000140000000-0x0000000140809000-memory.dmp	xmrig
behavioral2/memory/3108-148-0x0000000140000000-0x0000000140809000-memory.dmp	xmrig

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

Processes:

tmp.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation tmp.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	tmp.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

tmp.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\setup-update = "\"C:\\Users\\Admin\\AppData\\Roaming\\Winscp\\setup-update.exe\""	tmp.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

tmp.exeMSBuild.exe

description	pid	process	target process
PID 5048 set thread context of 3572	5048	tmp.exe	MSBuild.exe
PID 3572 set thread context of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 set thread context of 2460	3572	MSBuild.exe	explorer.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 2 IoCs

Processes:

powershell.exe

pid process

928 powershell.exe
928 powershell.exe
Suspicious behavior: LoadsDriver 2 IoCs

Processes:

pid process

652
652

pid	process
928	powershell.exe
928	powershell.exe

pid	process
652
652

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

tmp.exepowershell.exeexplorer.exeexplorer.exe

description	pid	process
Token: SeDebugPrivilege	5048	tmp.exe
Token: SeDebugPrivilege	928	powershell.exe
Token: SeLockMemoryPrivilege	3108	explorer.exe
Token: SeLockMemoryPrivilege	3108	explorer.exe
Token: SeLockMemoryPrivilege	2460	explorer.exe
Token: SeLockMemoryPrivilege	2460	explorer.exe

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

tmp.exeMSBuild.exe

description	pid	process	target process
PID 5048 wrote to memory of 928	5048	tmp.exe	powershell.exe
PID 5048 wrote to memory of 928	5048	tmp.exe	powershell.exe
PID 5048 wrote to memory of 3572	5048	tmp.exe	MSBuild.exe
PID 5048 wrote to memory of 3572	5048	tmp.exe	MSBuild.exe
PID 5048 wrote to memory of 3572	5048	tmp.exe	MSBuild.exe
PID 5048 wrote to memory of 3572	5048	tmp.exe	MSBuild.exe
PID 5048 wrote to memory of 3572	5048	tmp.exe	MSBuild.exe
PID 5048 wrote to memory of 3572	5048	tmp.exe	MSBuild.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 3108	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe
PID 3572 wrote to memory of 2460	3572	MSBuild.exe	explorer.exe

C:\Users\Admin\AppData\Local\Temp\tmp.exe
"C:\Users\Admin\AppData\Local\Temp\tmp.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:5048

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMwAwAA==
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:928

C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\MSBuild.exe
2⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:3572

C:\Windows\explorer.exe
C:\Windows\explorer.exe ehkyzugfc0 6E3sjfZq2rJQaxvLPmXgsGVibFQB1SRFKAJE4g4hvkD3AiVEpf0dgV55vmPVy2HdRPFNj0nba36ZsJAOfcDutlp1uGZD43OinuOsbkrvwsELbcnOwh7z7jTxIxb/8cy9pfSG0diraCsvnytCTdEeT2GKBHsz+86dcPKDL/hWxI5SqjNqMnP2x9Wrll200viFmS5UKRFkzR22xALyEeu9XJQjjuuTyIYvPP4Ev/EE6yU1WvjnM9Sp2EXSRvQOYzWqX5FTSWHt7WGDYd4eL5Zpmre3cqlQsh6wxVtgXUX0aTX41VTxhqK+4nVvT0XXJYih0vuBCgBnmZooDqrF9PUyXXi/imO83AsfsaMeX5t25sVYNxmiIeTvwj02JZ6V2Hi1
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:3108

C:\Windows\explorer.exe
C:\Windows\explorer.exe ehkyzugfc1 6E3sjfZq2rJQaxvLPmXgsJfOyO5DeIKfxGySQHgm1U7SutxdkMUte0IoBcJrwJZR0JxHqq095RdT+1DrfkD2jNApqjcsYyYz/1ffpuXHBMqjauSs2KIzU5jLOKjbNK+Q9aB1MGJaD//u7GHhN5AQFkGNzNZuljbiXjHHftKkwRn0qi9m9L/lrO0mLRvAp4XmpbPCO87NhuLYY+Cnh97Y4yDbiLkUTQmllBLN2kLj5+/iUVOmSRW7K9LvKlQfqGYis+oNYv8jbdSIWTDzRoAjZXcDWJKEZ+qjJ7iMWlp6rShaiUJNh3rtZIbqok5yk6z25MkctmIVhPI10JDyd+35GYmOp0vRfeEAkFtbRaAknpU95kmdqNbBb6GM6x+O2/1G
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:2460

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/928-136-0x00007FFD0AAC0000-0x00007FFD0B581000-memory.dmp

Filesize
10.8MB

Download
memory/928-139-0x00007FFD0AAC0000-0x00007FFD0B581000-memory.dmp

Filesize
10.8MB

Download
memory/928-138-0x00007FFD0AAC0000-0x00007FFD0B581000-memory.dmp

Filesize
10.8MB

Download
memory/928-135-0x0000000000000000-mapping.dmp

Download
memory/2460-152-0x000000014036EAC4-mapping.dmp

Download
memory/2460-153-0x0000000140000000-0x0000000140809000-memory.dmp

Filesize
8.0MB

Download
memory/2460-158-0x0000000140000000-0x0000000140809000-memory.dmp

Filesize
8.0MB

Download
memory/2460-155-0x0000000140000000-0x0000000140809000-memory.dmp

Filesize
8.0MB

Download
memory/3108-154-0x0000000140000000-0x0000000140809000-memory.dmp

Filesize
8.0MB

Download
memory/3108-146-0x0000000140000000-0x0000000140809000-memory.dmp

Filesize
8.0MB

Download
memory/3108-148-0x0000000140000000-0x0000000140809000-memory.dmp

Filesize
8.0MB

Download
memory/3108-151-0x0000000000CD0000-0x0000000000CF0000-memory.dmp

Filesize
128KB

Download
memory/3108-149-0x0000000140000000-0x0000000140809000-memory.dmp

Filesize
8.0MB

Download
memory/3108-147-0x000000014036EAC4-mapping.dmp

Download
memory/3572-145-0x000001C3F6760000-0x000001C3F6772000-memory.dmp

Filesize
72KB

Download
memory/3572-141-0x0000000140000000-mapping.dmp

Download
memory/3572-144-0x00007FFD0AAC0000-0x00007FFD0B581000-memory.dmp

Filesize
10.8MB

Download
memory/3572-143-0x00007FFD0AAC0000-0x00007FFD0B581000-memory.dmp

Filesize
10.8MB

Download
memory/3572-140-0x0000000140000000-0x0000000140248000-memory.dmp

Filesize
2.3MB

Download
memory/3572-156-0x00007FFD0AAC0000-0x00007FFD0B581000-memory.dmp

Filesize
10.8MB

Download
memory/5048-132-0x00000283728F0000-0x00000283728FE000-memory.dmp

Filesize
56KB

Download
memory/5048-137-0x00007FFD0AAC0000-0x00007FFD0B581000-memory.dmp

Filesize
10.8MB

Download
memory/5048-133-0x00007FFD0AAC0000-0x00007FFD0B581000-memory.dmp

Filesize
10.8MB

Download
memory/5048-142-0x00007FFD0AAC0000-0x00007FFD0B581000-memory.dmp

Filesize
10.8MB

Download
memory/5048-134-0x0000028375E40000-0x0000028375E62000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads