purecrypter | 305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6

Analysis

max time kernel
121s
max time network
152s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
05-02-2023 16:52

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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

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

resource	yara_rule
behavioral1/memory/564-66-0x0000000007360000-0x00000000075CE000-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

resource	yara_rule
behavioral1/memory/1952-76-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/1952-77-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/1952-78-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/1952-79-0x00000000004494BE-mapping.dmp	family_quasar
behavioral1/memory/1952-81-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/1952-83-0x0000000000400000-0x000000000044E000-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

pid	Process
564	Updater-File.exe

Loads dropped DLL 1 IoCs

pid	Process
1232	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe

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-1-5-21-1214520366-621468234-4062160515-1000\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.

flow	ioc
8	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 564 set thread context of 1952	564	Updater-File.exe	33

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

pid	pid_target	Process	procid_target
684	1232	WerFault.exe	27

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1704	powershell.exe
564	Updater-File.exe
564	Updater-File.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	1232	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe
Token: SeDebugPrivilege	564	Updater-File.exe
Token: SeDebugPrivilege	1704	powershell.exe
Token: SeDebugPrivilege	1952	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1952	RegAsm.exe

Suspicious use of WriteProcessMemory 34 IoCs

description	pid	Process	procid_target
PID 1232 wrote to memory of 564	1232	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	28
PID 1232 wrote to memory of 564	1232	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	28
PID 1232 wrote to memory of 564	1232	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	28
PID 1232 wrote to memory of 564	1232	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	28
PID 1232 wrote to memory of 564	1232	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	28
PID 1232 wrote to memory of 564	1232	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	28
PID 1232 wrote to memory of 564	1232	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	28
PID 1232 wrote to memory of 684	1232	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	29
PID 1232 wrote to memory of 684	1232	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	29
PID 1232 wrote to memory of 684	1232	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	29
PID 1232 wrote to memory of 684	1232	305cfdd7d464938cabe66fcf3116df431c10742c775a4a588d38349ea18a7fb6.exe	29
PID 564 wrote to memory of 1704	564	Updater-File.exe	30
PID 564 wrote to memory of 1704	564	Updater-File.exe	30
PID 564 wrote to memory of 1704	564	Updater-File.exe	30
PID 564 wrote to memory of 1704	564	Updater-File.exe	30
PID 564 wrote to memory of 2016	564	Updater-File.exe	32
PID 564 wrote to memory of 2016	564	Updater-File.exe	32
PID 564 wrote to memory of 2016	564	Updater-File.exe	32
PID 564 wrote to memory of 2016	564	Updater-File.exe	32
PID 564 wrote to memory of 2016	564	Updater-File.exe	32
PID 564 wrote to memory of 2016	564	Updater-File.exe	32
PID 564 wrote to memory of 2016	564	Updater-File.exe	32
PID 564 wrote to memory of 1952	564	Updater-File.exe	33
PID 564 wrote to memory of 1952	564	Updater-File.exe	33
PID 564 wrote to memory of 1952	564	Updater-File.exe	33
PID 564 wrote to memory of 1952	564	Updater-File.exe	33
PID 564 wrote to memory of 1952	564	Updater-File.exe	33
PID 564 wrote to memory of 1952	564	Updater-File.exe	33
PID 564 wrote to memory of 1952	564	Updater-File.exe	33
PID 564 wrote to memory of 1952	564	Updater-File.exe	33
PID 564 wrote to memory of 1952	564	Updater-File.exe	33
PID 564 wrote to memory of 1952	564	Updater-File.exe	33
PID 564 wrote to memory of 1952	564	Updater-File.exe	33
PID 564 wrote to memory of 1952	564	Updater-File.exe	33

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:1232
- 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 behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:564
- - 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:1704
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
    3⤵
    PID:2016
- - 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:1952
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 1232 -s 1452
  2⤵
  - Program crash
  PID:684

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

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/564-66-0x0000000007360000-0x00000000075CE000-memory.dmp

Filesize
2.4MB

Download
memory/564-72-0x00000000051E0000-0x000000000523E000-memory.dmp

Filesize
376KB

Download
memory/564-62-0x0000000000F80000-0x0000000000F88000-memory.dmp

Filesize
32KB

Download
memory/1232-57-0x0000000076391000-0x0000000076393000-memory.dmp

Filesize
8KB

Download
memory/1232-56-0x0000000000260000-0x0000000000266000-memory.dmp

Filesize
24KB

Download
memory/1232-65-0x0000000004565000-0x0000000004576000-memory.dmp

Filesize
68KB

Download
memory/1232-55-0x0000000006E00000-0x0000000006F56000-memory.dmp

Filesize
1.3MB

Download
memory/1232-54-0x0000000000860000-0x0000000000924000-memory.dmp

Filesize
784KB

Download
memory/1704-70-0x000000006C660000-0x000000006CC0B000-memory.dmp

Filesize
5.7MB

Download
memory/1704-71-0x000000006C660000-0x000000006CC0B000-memory.dmp

Filesize
5.7MB

Download
memory/1704-69-0x000000006C660000-0x000000006CC0B000-memory.dmp

Filesize
5.7MB

Download
memory/1952-73-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1952-74-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1952-76-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1952-77-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1952-78-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1952-81-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1952-83-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download