purecrypter | d2ea05b0fa56e153cdbf014f6083cd6826bf52894ea38a664b1ed3669d6ec1d5

General

Target

305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe
Size

763KB
MD5

869037e716218fb7551d84b8ce7d0ae7
SHA1

12cb776519eeb2d5e6a7ab1ddce3a09f143d5f18
SHA256

305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6
SHA512

6840e10d1daeacd169dba4a0049bc3b9087726dd45551b9a9587d57ec45d926356ce1656a39fdf35c1acb4020c564ec1f6a910fd83cde99e3ff75195728c72d2
SSDEEP

12288:SAZdPU5ttcsREhy5IYU8OaNISOvsk0gnT467zpmw7OfimWm/YfdFxfJ:S2UVc+EhyuAOaNIBXnT46fpmiOfimWy4

Score

10^/10

purecrypter quasar revengerat office04 downloader loader persistence spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office04

C2

youhackernetpaingodxd.duckdns.org:5557

blablashitspreading.ddns.net:5557

Mutex

xEoEv3HHdyEIYwJRFM

Attributes

encryption_key
w3WfcmWh1iXT9cxeKFEX
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

Detect PureCrypter injector 1 IoCs

loader

Processes:

resource	yara_rule
behavioral1/memory/1160-66-0x00000000074B0000-0x000000000771E000-memory.dmp	family_purecrypter

PureCrypter
PureCrypter is a .NET malware loader first seen in early 2021.
loader downloader purecrypter
Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 6 IoCs

Processes:

resource	yara_rule
behavioral1/memory/888-76-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/888-77-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/888-79-0x00000000004494BE-mapping.dmp	family_quasar
behavioral1/memory/888-78-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/888-81-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/888-83-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar

RevengeRAT
Remote-access trojan with a wide range of capabilities.
trojan revengerat
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

Updater-File.exe

pid process

1160 Updater-File.exe
Loads dropped DLL 1 IoCs

Processes:

305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe

pid process

1736 305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe

pid	process
1160	Updater-File.exe

pid	process
1736	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

Updater-File.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1214520366-621468234-4062160515-1000\Software\Microsoft\Windows\CurrentVersion\Run\Driver = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsoft\\Driver.exe\""	Updater-File.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

8 ip-api.com
Suspicious use of SetThreadContext 1 IoCs

Processes:

Updater-File.exe

description pid process target process

PID 1160 set thread context of 888 1160 Updater-File.exe RegAsm.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

920 1736 WerFault.exe 305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

powershell.exe

pid process

364 powershell.exe

flow	ioc
8	ip-api.com

description	pid	process	target process
PID 1160 set thread context of 888	1160	Updater-File.exe	RegAsm.exe

pid	pid_target	process	target process
920	1736	WerFault.exe	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe

pid	process
364	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exeUpdater-File.exepowershell.exeRegAsm.exe

description	pid	process
Token: SeDebugPrivilege	1736	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe
Token: SeDebugPrivilege	1160	Updater-File.exe
Token: SeDebugPrivilege	364	powershell.exe
Token: SeDebugPrivilege	888	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

RegAsm.exe

pid process

888 RegAsm.exe

pid	process
888	RegAsm.exe

Suspicious use of WriteProcessMemory 27 IoCs

Processes:

305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exeUpdater-File.exe

description	pid	process	target process
PID 1736 wrote to memory of 1160	1736	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	Updater-File.exe
PID 1736 wrote to memory of 1160	1736	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	Updater-File.exe
PID 1736 wrote to memory of 1160	1736	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	Updater-File.exe
PID 1736 wrote to memory of 1160	1736	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	Updater-File.exe
PID 1736 wrote to memory of 1160	1736	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	Updater-File.exe
PID 1736 wrote to memory of 1160	1736	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	Updater-File.exe
PID 1736 wrote to memory of 1160	1736	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	Updater-File.exe
PID 1736 wrote to memory of 920	1736	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	WerFault.exe
PID 1736 wrote to memory of 920	1736	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	WerFault.exe
PID 1736 wrote to memory of 920	1736	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	WerFault.exe
PID 1736 wrote to memory of 920	1736	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	WerFault.exe
PID 1160 wrote to memory of 364	1160	Updater-File.exe	powershell.exe
PID 1160 wrote to memory of 364	1160	Updater-File.exe	powershell.exe
PID 1160 wrote to memory of 364	1160	Updater-File.exe	powershell.exe
PID 1160 wrote to memory of 364	1160	Updater-File.exe	powershell.exe
PID 1160 wrote to memory of 888	1160	Updater-File.exe	RegAsm.exe
PID 1160 wrote to memory of 888	1160	Updater-File.exe	RegAsm.exe
PID 1160 wrote to memory of 888	1160	Updater-File.exe	RegAsm.exe
PID 1160 wrote to memory of 888	1160	Updater-File.exe	RegAsm.exe
PID 1160 wrote to memory of 888	1160	Updater-File.exe	RegAsm.exe
PID 1160 wrote to memory of 888	1160	Updater-File.exe	RegAsm.exe
PID 1160 wrote to memory of 888	1160	Updater-File.exe	RegAsm.exe
PID 1160 wrote to memory of 888	1160	Updater-File.exe	RegAsm.exe
PID 1160 wrote to memory of 888	1160	Updater-File.exe	RegAsm.exe
PID 1160 wrote to memory of 888	1160	Updater-File.exe	RegAsm.exe
PID 1160 wrote to memory of 888	1160	Updater-File.exe	RegAsm.exe
PID 1160 wrote to memory of 888	1160	Updater-File.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe
"C:\Users\Admin\AppData\Local\Temp\305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe"
1⤵
- Loads dropped DLL
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1736

C:\Users\Admin\AppData\Roaming\Updater-File.exe
"C:\Users\Admin\AppData\Roaming\Updater-File.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1160

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:364

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
3⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:888

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1736 -s 1452
2⤵
- Program crash
PID:920

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Updater-File.exe
Filesize
6KB

MD5
be2c9d9f3e9206eb7d809157ea37d0ea

SHA1
79fc984efb6d9e58c21f7c5dee8de2fc44710f62

SHA256
f07ca31e483745ac9fe74da53f939a797f3f8868717eb29f9f0d1286b89f6b79

SHA512
2510583a2690be0c48614fa21d24c2919d6c4f704d897ed4bb5a523d0bbc3616bd2aba7a6b22120068a24aa756a9b6f37feeb2b8eb461b86c2eacde935478d4b

Download Submit
C:\Users\Admin\AppData\Roaming\Updater-File.exe
Filesize
6KB

MD5
be2c9d9f3e9206eb7d809157ea37d0ea

SHA1
79fc984efb6d9e58c21f7c5dee8de2fc44710f62

SHA256
f07ca31e483745ac9fe74da53f939a797f3f8868717eb29f9f0d1286b89f6b79

SHA512
2510583a2690be0c48614fa21d24c2919d6c4f704d897ed4bb5a523d0bbc3616bd2aba7a6b22120068a24aa756a9b6f37feeb2b8eb461b86c2eacde935478d4b

Download Submit
\Users\Admin\AppData\Roaming\Updater-File.exe
Filesize
6KB

MD5
be2c9d9f3e9206eb7d809157ea37d0ea

SHA1
79fc984efb6d9e58c21f7c5dee8de2fc44710f62

SHA256
f07ca31e483745ac9fe74da53f939a797f3f8868717eb29f9f0d1286b89f6b79

SHA512
2510583a2690be0c48614fa21d24c2919d6c4f704d897ed4bb5a523d0bbc3616bd2aba7a6b22120068a24aa756a9b6f37feeb2b8eb461b86c2eacde935478d4b

Download Submit
memory/364-67-0x0000000000000000-mapping.dmp

Download
memory/364-69-0x000000006C720000-0x000000006CCCB000-memory.dmp

Filesize
5.7MB

Download
memory/364-71-0x000000006C720000-0x000000006CCCB000-memory.dmp

Filesize
5.7MB

Download
memory/364-70-0x000000006C720000-0x000000006CCCB000-memory.dmp

Filesize
5.7MB

Download
memory/888-76-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/888-73-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/888-83-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/888-81-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/888-78-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/888-79-0x00000000004494BE-mapping.dmp

Download
memory/888-77-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/888-74-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/920-65-0x0000000000000000-mapping.dmp

Download
memory/1160-72-0x0000000004CA0000-0x0000000004CFE000-memory.dmp

Filesize
376KB

Download
memory/1160-62-0x00000000003B0000-0x00000000003B8000-memory.dmp

Filesize
32KB

Download
memory/1160-59-0x0000000000000000-mapping.dmp

Download
memory/1160-66-0x00000000074B0000-0x000000000771E000-memory.dmp

Filesize
2.4MB

Download
memory/1736-57-0x00000000767C1000-0x00000000767C3000-memory.dmp

Filesize
8KB

Download
memory/1736-56-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/1736-55-0x0000000006EE0000-0x0000000007036000-memory.dmp

Filesize
1.3MB

Download
memory/1736-54-0x0000000001090000-0x0000000001154000-memory.dmp

Filesize
784KB

Download
memory/1736-64-0x00000000049D5000-0x00000000049E6000-memory.dmp

Filesize
68KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads