purecrypter | 0ddf7226ac77878f78a73875b0633229368d8e8c28acdd4469d65648d99adfc6

General

Target

REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe
Size

7KB
MD5

2191219c54b8ae4fd655146a479a2c8c
SHA1

54b26e2cc5328f53acf0ba5be5a8a94da1008190
SHA256

0ddf7226ac77878f78a73875b0633229368d8e8c28acdd4469d65648d99adfc6
SHA512

8b5369c976a31b9a60da34698bcced445f4d561b1908e8b7e883715aa0031e04bafd19ae24b18133bf3816802f1a4fdc90214506dcb258bcc4bdaaec9fffafbb
SSDEEP

96:U/Ef/c/7yFyZ/nOci8cN0mMiUAmBVQttEkXnLFO0bjzNt:QEfkDyFETONB1LmYtzbTR

Score

10^/10

purecrypter collection downloader evasion loader

Malware Config

Signatures

Detect PureCrypter injector 1 IoCs

loader

Processes:

resource	yara_rule
behavioral1/memory/1152-56-0x0000000006670000-0x00000000068FC000-memory.dmp	family_purecrypter

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

Disables RegEdit via registry modification 1 IoCs

evasion

Processes:

REG.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1"	REG.exe

Disables Task Manager via registry modification
evasion

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe
Key opened	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Office\15.0\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.

Processes:

flow ioc

14 checkip.dyndns.org
Suspicious use of SetThreadContext 1 IoCs

Processes:

REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe

description pid process target process

PID 1152 set thread context of 928 1152 REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe MSBuild.exe
Drops file in Windows directory 1 IoCs

Processes:

MSBuild.exe

description ioc process

File opened for modification C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe MSBuild.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Modifies registry key 1 TTPs 1 IoCs

Modify Registry
T1112

Processes:

REG.exe

pid process

1208 REG.exe
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exeREVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exeMSBuild.exe

pid process

1568 powershell.exe
1152 REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe
928 MSBuild.exe
928 MSBuild.exe

flow	ioc
14	checkip.dyndns.org

description	pid	process	target process
PID 1152 set thread context of 928	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	MSBuild.exe

description	ioc	process
File opened for modification	C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe	MSBuild.exe

pid	process
1208	REG.exe

pid	process
1568	powershell.exe
1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe
928	MSBuild.exe
928	MSBuild.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exepowershell.exeMSBuild.exe

description	pid	process
Token: SeDebugPrivilege	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe
Token: SeDebugPrivilege	1568	powershell.exe
Token: SeDebugPrivilege	928	MSBuild.exe

Suspicious use of WriteProcessMemory 21 IoCs

Processes:

REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exeMSBuild.exe

description	pid	process	target process
PID 1152 wrote to memory of 1568	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	powershell.exe
PID 1152 wrote to memory of 1568	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	powershell.exe
PID 1152 wrote to memory of 1568	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	powershell.exe
PID 1152 wrote to memory of 1568	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	powershell.exe
PID 1152 wrote to memory of 1760	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	MSBuild.exe
PID 1152 wrote to memory of 1760	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	MSBuild.exe
PID 1152 wrote to memory of 1760	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	MSBuild.exe
PID 1152 wrote to memory of 1760	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	MSBuild.exe
PID 1152 wrote to memory of 928	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	MSBuild.exe
PID 1152 wrote to memory of 928	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	MSBuild.exe
PID 1152 wrote to memory of 928	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	MSBuild.exe
PID 1152 wrote to memory of 928	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	MSBuild.exe
PID 1152 wrote to memory of 928	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	MSBuild.exe
PID 1152 wrote to memory of 928	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	MSBuild.exe
PID 1152 wrote to memory of 928	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	MSBuild.exe
PID 1152 wrote to memory of 928	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	MSBuild.exe
PID 1152 wrote to memory of 928	1152	REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe	MSBuild.exe
PID 928 wrote to memory of 1208	928	MSBuild.exe	REG.exe
PID 928 wrote to memory of 1208	928	MSBuild.exe	REG.exe
PID 928 wrote to memory of 1208	928	MSBuild.exe	REG.exe
PID 928 wrote to memory of 1208	928	MSBuild.exe	REG.exe

outlook_office_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

outlook_win_path 1 IoCs

Processes:

MSBuild.exe

description	ioc	process
Key opened	\REGISTRY\USER\S-1-5-21-3406023954-474543476-3319432036-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	MSBuild.exe

C:\Users\Admin\AppData\Local\Temp\REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe
"C:\Users\Admin\AppData\Local\Temp\REVİZE EDİLMİŞ TEKLİF VE SATIN ALMA EMRİ.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1152

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:1568

C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
2⤵
PID:1760

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
- Drops file in Windows directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
- outlook_office_path
- outlook_win_path
PID:928

C:\Windows\SysWOW64\REG.exe
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 1 /f
3⤵
- Disables RegEdit via registry modification
- Modifies registry key
PID:1208

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Email Collection

1

T1114

Exfiltration

Command and Control

Impact

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Downloads

memory/928-69-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/928-70-0x000000000045299E-mapping.dmp

Download
memory/928-63-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/928-64-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/928-74-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/928-66-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/928-72-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/928-68-0x0000000000400000-0x0000000000458000-memory.dmp

Filesize
352KB

Download
memory/1152-55-0x0000000075881000-0x0000000075883000-memory.dmp

Filesize
8KB

Download
memory/1152-56-0x0000000006670000-0x00000000068FC000-memory.dmp

Filesize
2.5MB

Download
memory/1152-62-0x00000000056B0000-0x0000000005716000-memory.dmp

Filesize
408KB

Download
memory/1152-54-0x00000000012A0000-0x00000000012A8000-memory.dmp

Filesize
32KB

Download
memory/1208-76-0x0000000000000000-mapping.dmp

Download
memory/1568-60-0x000000006F5A0000-0x000000006FB4B000-memory.dmp

Filesize
5.7MB

Download
memory/1568-59-0x000000006F5A0000-0x000000006FB4B000-memory.dmp

Filesize
5.7MB

Download
memory/1568-61-0x000000006F5A0000-0x000000006FB4B000-memory.dmp

Filesize
5.7MB

Download
memory/1568-57-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads