asyncrat | 755b9c9ed15a3d43f8da5ddd62146897091f4f0aa301917167d26f368d88a4a7

Analysis

max time kernel
119s
max time network
151s
platform
windows7_x64
resource
win7-20240705-en
resource tags

arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-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

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 2596 set thread context of 3212	2596	crvzekdg.exe	33

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

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3180	powershell.exe
3212	InstallUtil.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2596	crvzekdg.exe
Token: SeDebugPrivilege	2596	crvzekdg.exe
Token: SeDebugPrivilege	3180	powershell.exe
Token: SeDebugPrivilege	3212	InstallUtil.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3212	InstallUtil.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2596 wrote to memory of 3180	2596	crvzekdg.exe	31
PID 2596 wrote to memory of 3180	2596	crvzekdg.exe	31
PID 2596 wrote to memory of 3180	2596	crvzekdg.exe	31
PID 2596 wrote to memory of 3180	2596	crvzekdg.exe	31
PID 2596 wrote to memory of 3212	2596	crvzekdg.exe	33
PID 2596 wrote to memory of 3212	2596	crvzekdg.exe	33
PID 2596 wrote to memory of 3212	2596	crvzekdg.exe	33
PID 2596 wrote to memory of 3212	2596	crvzekdg.exe	33
PID 2596 wrote to memory of 3212	2596	crvzekdg.exe	33
PID 2596 wrote to memory of 3212	2596	crvzekdg.exe	33
PID 2596 wrote to memory of 3212	2596	crvzekdg.exe	33
PID 2596 wrote to memory of 3212	2596	crvzekdg.exe	33
PID 2596 wrote to memory of 3212	2596	crvzekdg.exe	33
PID 2596 wrote to memory of 3212	2596	crvzekdg.exe	33
PID 2596 wrote to memory of 3212	2596	crvzekdg.exe	33
PID 2596 wrote to memory of 3212	2596	crvzekdg.exe	33

C:\Users\Admin\AppData\Local\Temp\crvzekdg.exe
"C:\Users\Admin\AppData\Local\Temp\crvzekdg.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2596
- 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:3180
- 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:3212

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab2CEC.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
memory/2596-55-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-7-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-3-0x0000000007850000-0x0000000007A72000-memory.dmp

Filesize
2.1MB

Download
memory/2596-0-0x000000007455E000-0x000000007455F000-memory.dmp

Filesize
4KB

Download
memory/2596-5-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-11-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-9-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-13-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-19-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-21-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-51-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-27-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-61-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-23-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-17-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-15-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-4-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-31-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-35-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-42-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-25-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-2-0x0000000074550000-0x0000000074C3E000-memory.dmp

Filesize
6.9MB

Download
memory/2596-29-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-67-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-33-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-65-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-63-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-59-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-57-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-53-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-4890-0x0000000074550000-0x0000000074C3E000-memory.dmp

Filesize
6.9MB

Download
memory/2596-49-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-47-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-45-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-43-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-4892-0x00000000056D0000-0x000000000571C000-memory.dmp

Filesize
304KB

Download
memory/2596-4891-0x0000000004CF0000-0x0000000004D4E000-memory.dmp

Filesize
376KB

Download
memory/2596-39-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-37-0x0000000007850000-0x0000000007A6D000-memory.dmp

Filesize
2.1MB

Download
memory/2596-4893-0x0000000005720000-0x0000000005774000-memory.dmp

Filesize
336KB

Download
memory/2596-1-0x0000000000CA0000-0x0000000000D3E000-memory.dmp

Filesize
632KB

Download
memory/2596-4912-0x0000000074550000-0x0000000074C3E000-memory.dmp

Filesize
6.9MB

Download
memory/3180-4911-0x0000000002E10000-0x0000000002E50000-memory.dmp

Filesize
256KB

Download
memory/3212-4910-0x0000000000400000-0x0000000000416000-memory.dmp

Filesize
88KB

Download