asyncrat | 673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880

Analysis

max time kernel
148s
max time network
146s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
10/07/2026, 11:14

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General

Target
673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
Size 45KB
Sample260710-nb75labs4s
SHA256 673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880
MD5 b6a7e4d6c7402563313d9bdb7fad683b
SHA1 270be6f03198809da66c070266fb5e357d009b87
SHA512 e91a8026200626f788cdb032e4e386d3f04560dfb9222b5471bea9733afd3e49a632837e9f04f7c44f531fbe0bdfe32326b63f0d5b96ce93c7234d6df91f5314
SSDEEP 768:5udApTNctooWUS7C+mo2qtgDEbHBOjTOPI/TzjbRgX3iXtMdiShVaYwBDZ0x:5udApTNmU2fyYf3/T3beXSC1hVaYmd0x
TLSH
T1D7230B0037E8822BF2BE4F74ACF26146467AF6673603D64A1CC4519B5713FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

phimsexz.org:80
phimsexz.org:22
phimsexz.org:8080
phimsexz.org:8880
phimsexz.org:2052
phimsexz.org:2082
phimsexz.org:2086
phimsexz.org:2095
phimsexz.org:443
phimsexz.org:2053
phimsexz.org:2083
phimsexz.org:2087
phimsexz.org:2096
phimsexz.org:8443
www.phimsexz.org:80
www.phimsexz.org:22
www.phimsexz.org:8080
www.phimsexz.org:8880
www.phimsexz.org:2052
www.phimsexz.org:2082
www.phimsexz.org:2086
www.phimsexz.org:2095
www.phimsexz.org:443
www.phimsexz.org:2053
www.phimsexz.org:2083
www.phimsexz.org:2087
www.phimsexz.org:2096
www.phimsexz.org:8443
conficker.phimsexz.org:80
conficker.phimsexz.org:22
conficker.phimsexz.org:8080
conficker.phimsexz.org:8880
conficker.phimsexz.org:2052
conficker.phimsexz.org:2082
conficker.phimsexz.org:2086
conficker.phimsexz.org:2095
conficker.phimsexz.org:443
conficker.phimsexz.org:2053
conficker.phimsexz.org:2083
conficker.phimsexz.org:2087
conficker.phimsexz.org:2096
conficker.phimsexz.org:8443
agenttesla.phimsexz.org:80
agenttesla.phimsexz.org:22
agenttesla.phimsexz.org:8080
agenttesla.phimsexz.org:8880
agenttesla.phimsexz.org:2052
agenttesla.phimsexz.org:2082
agenttesla.phimsexz.org:2086
agenttesla.phimsexz.org:2095
agenttesla.phimsexz.org:443
agenttesla.phimsexz.org:2053
agenttesla.phimsexz.org:2083
agenttesla.phimsexz.org:2087
agenttesla.phimsexz.org:2096
agenttesla.phimsexz.org:8443

Mutex

EzYrdueBhtI4

Attributes

delay
0
install
true
install_file
57kbsw.exe
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x001a00000001bc54-9.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1236	57kbsw.exe
5032	57kbsw.exe

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 7 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	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	57kbsw.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	57kbsw.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4272	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
2784	schtasks.exe

Suspicious behavior: EnumeratesProcesses 29 IoCs

pid	Process
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
Token: SeDebugPrivilege	1236	57kbsw.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 2712 wrote to memory of 3164	2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe	87
PID 2712 wrote to memory of 4124	2712	673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe	89
PID 3164 wrote to memory of 2784	3164	cmd.exe	91
PID 4124 wrote to memory of 4272	4124	cmd.exe	92
PID 4124 wrote to memory of 5032	4124	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe
"C:\Users\Admin\AppData\Local\Temp\673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2712
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "57kbsw" /tr '"C:\Users\Admin\AppData\Roaming\57kbsw.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3164
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "57kbsw" /tr '"C:\Users\Admin\AppData\Roaming\57kbsw.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2784
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp83BD.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4124
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4272
- - C:\Users\Admin\AppData\Roaming\57kbsw.exe
    "C:\Users\Admin\AppData\Roaming\57kbsw.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5032

C:\Users\Admin\AppData\Roaming\57kbsw.exe
"C:\Users\Admin\AppData\Roaming\57kbsw.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1236

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

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

tmp83BD.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp83BD.tmp.bat
Size 150B
SHA256 5e036c44a2f7775c577eafe465930ca9f6803a0e4ba40883257c7c519df03110
MD5 6ac6a0d4c88f2eb90ac6755fd3994c17
SHA1 c793c844395d3434fa42132880b991ee03d62a6e
SHA512 56c09704621148e77c8eb2d96f4a85417fb61eb6d56702b427612a5a15a73ee27f9acb3a6242701ba21e6ad3a3dbe0e233c4bf9dd16f4345b5c1ed6358bcd780
TLSH
T11BC08C8261C6AA4E6C05586302BA949E9166E8193F80BB008308800D2284598E4992C6
MD5 SHA1 SHA512 TLSH

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57kbsw.exe

Path C:\Users\Admin\AppData\Roaming\57kbsw.exe
Size 45KB
SHA256 673eb545feb2abf310f0715464f6f423c1cb50dc92c5226fc852e014dd337880
MD5 b6a7e4d6c7402563313d9bdb7fad683b
SHA1 270be6f03198809da66c070266fb5e357d009b87
SHA512 e91a8026200626f788cdb032e4e386d3f04560dfb9222b5471bea9733afd3e49a632837e9f04f7c44f531fbe0bdfe32326b63f0d5b96ce93c7234d6df91f5314
SSDEEP 768:5udApTNctooWUS7C+mo2qtgDEbHBOjTOPI/TzjbRgX3iXtMdiShVaYwBDZ0x:5udApTNmU2fyYf3/T3beXSC1hVaYmd0x
TLSH
T1D7230B0037E8822BF2BE4F74ACF26146467AF6673603D64A1CC4519B5713FC69A426FE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/1236-11-0x00000000743A0000-0x0000000074B5C000-memory.dmp

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memory/1236-14-0x00000000743A0000-0x0000000074B5C000-memory.dmp

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memory/2712-0-0x0000000074582000-0x0000000074583000-memory.dmp

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memory/2712-1-0x0000000000610000-0x0000000000622000-memory.dmp

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memory/2712-2-0x0000000074570000-0x0000000074D2C000-memory.dmp

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memory/2712-3-0x00000000051A0000-0x000000000523C000-memory.dmp

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memory/2712-13-0x0000000074570000-0x0000000074D2C000-memory.dmp

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