purecrypter | ca86561805b0e4184479159a552c05becbbad6f209b03df0819cbb0a47d75fe7

General

Target

pack.exe
Size

500.1MB
MD5

e893801ca83e49f84dca107d6e1162b4
SHA1

3122871288ac44693324194b793fc40347360bd4
SHA256

ca86561805b0e4184479159a552c05becbbad6f209b03df0819cbb0a47d75fe7
SHA512

94f5ca28aedbc2e32383e10ed354a7e8d135f234dae6f1b6f2e1e6f703e4323ae1f3d0f5cb23d57aa85ebe319e59709429837666a7e96234bcabe6b4b851a719
SSDEEP

384:ogPThofsksm2/HMLntRBSlwy/VpREaEhAqDjbY2QuzDf+m9xgJJt/V4568OwXpkD:tIXxOn6ZDn7d21448OKpkBC5ZF/i1

Score

10^/10

purecrypter quasar revengerat office04 downloader loader persistence spyware trojan

Malware Config

Extracted

Family

purecrypter

C2

http://95.214.24.37/SystemEnv/uploads/programme_Hdayjetq.jpg

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office04

C2

45.83.122.111:5557

Mutex

p337SdjNpEb5aKmAPc

Attributes

encryption_key
JzZjeR51DHpipyQ3lm91
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Extracted

Family

quasar

Attributes

reconnect_delay
3000

Signatures

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/1540-73-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/1540-74-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/1540-76-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/1540-78-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/1540-80-0x0000000000400000-0x000000000044E000-memory.dmp	family_quasar
behavioral1/memory/1540-81-0x0000000004960000-0x00000000049A0000-memory.dmp	family_quasar

RevengeRAT
Remote-access trojan with a wide range of capabilities.
trojan revengerat

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

pack.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3430344531-3702557399-3004411149-1000\Software\Microsoft\Windows\CurrentVersion\Run\Software = "\"C:\\Users\\Admin\\AppData\\Roaming\\Microsotf\\Software.exe\""	pack.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

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

Processes:

pack.exe

description pid process target process

PID 1984 set thread context of 1540 1984 pack.exe InstallUtil.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
5	ip-api.com

description	pid	process	target process
PID 1984 set thread context of 1540	1984	pack.exe	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

Processes:

taskmgr.exepowershell.exe

pid	process
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
1240	powershell.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

taskmgr.exe

pid process

660 taskmgr.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

pack.exetaskmgr.exepowershell.exeInstallUtil.exe

description	pid	process
Token: SeDebugPrivilege	1984	pack.exe
Token: SeDebugPrivilege	660	taskmgr.exe
Token: SeDebugPrivilege	1240	powershell.exe
Token: SeDebugPrivilege	1540	InstallUtil.exe

Suspicious use of FindShellTrayWindow 43 IoCs

Processes:

taskmgr.exe

pid	process
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe

Suspicious use of SendNotifyMessage 42 IoCs

Processes:

taskmgr.exe

pid	process
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe
660	taskmgr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

InstallUtil.exe

pid process

1540 InstallUtil.exe

pid	process
1540	InstallUtil.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

pack.exe

description	pid	process	target process
PID 1984 wrote to memory of 1240	1984	pack.exe	powershell.exe
PID 1984 wrote to memory of 1240	1984	pack.exe	powershell.exe
PID 1984 wrote to memory of 1240	1984	pack.exe	powershell.exe
PID 1984 wrote to memory of 1240	1984	pack.exe	powershell.exe
PID 1984 wrote to memory of 1540	1984	pack.exe	InstallUtil.exe
PID 1984 wrote to memory of 1540	1984	pack.exe	InstallUtil.exe
PID 1984 wrote to memory of 1540	1984	pack.exe	InstallUtil.exe
PID 1984 wrote to memory of 1540	1984	pack.exe	InstallUtil.exe
PID 1984 wrote to memory of 1540	1984	pack.exe	InstallUtil.exe
PID 1984 wrote to memory of 1540	1984	pack.exe	InstallUtil.exe
PID 1984 wrote to memory of 1540	1984	pack.exe	InstallUtil.exe
PID 1984 wrote to memory of 1540	1984	pack.exe	InstallUtil.exe
PID 1984 wrote to memory of 1540	1984	pack.exe	InstallUtil.exe
PID 1984 wrote to memory of 1540	1984	pack.exe	InstallUtil.exe
PID 1984 wrote to memory of 1540	1984	pack.exe	InstallUtil.exe
PID 1984 wrote to memory of 1540	1984	pack.exe	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\pack.exe
"C:\Users\Admin\AppData\Local\Temp\pack.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1984

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMQAwADAA
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1240

C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1540

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:660

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

Replay Monitor

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Downloads

memory/660-56-0x0000000140000000-0x00000001405E8000-memory.dmp

Filesize
5.9MB

Download
memory/660-57-0x0000000140000000-0x00000001405E8000-memory.dmp

Filesize
5.9MB

Download
memory/1240-68-0x00000000026F0000-0x0000000002730000-memory.dmp

Filesize
256KB

Download
memory/1240-63-0x00000000026F0000-0x0000000002730000-memory.dmp

Filesize
256KB

Download
memory/1240-67-0x00000000026F0000-0x0000000002730000-memory.dmp

Filesize
256KB

Download
memory/1240-65-0x00000000026F0000-0x0000000002730000-memory.dmp

Filesize
256KB

Download
memory/1240-64-0x00000000026F0000-0x0000000002730000-memory.dmp

Filesize
256KB

Download
memory/1540-78-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1540-83-0x0000000004960000-0x00000000049A0000-memory.dmp

Filesize
256KB

Download
memory/1540-80-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1540-76-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1540-81-0x0000000004960000-0x00000000049A0000-memory.dmp

Filesize
256KB

Download
memory/1540-75-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1540-71-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1540-72-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1540-73-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1540-74-0x0000000000400000-0x000000000044E000-memory.dmp

Filesize
312KB

Download
memory/1984-59-0x0000000000A10000-0x0000000000A34000-memory.dmp

Filesize
144KB

Download
memory/1984-66-0x0000000004CB0000-0x0000000004CF0000-memory.dmp

Filesize
256KB

Download
memory/1984-60-0x00000000084A0000-0x0000000008532000-memory.dmp

Filesize
584KB

Download
memory/1984-54-0x0000000000ED0000-0x0000000000EF2000-memory.dmp

Filesize
136KB

Download
memory/1984-58-0x0000000008FE0000-0x00000000090E8000-memory.dmp

Filesize
1.0MB

Download
memory/1984-55-0x0000000004CB0000-0x0000000004CF0000-memory.dmp

Filesize
256KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads