asyncrat | 0e6fc77a72dd0b4c8f8fe7607c92eac7cf5b0d607c9904e09d9fb1b2128a2e51

Analysis

max time kernel
143s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
01-11-2024 08:01

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General

Target

start-main/pthjadh.exe
Size

2.3MB
MD5

9c044a232b3f817c3b91ce10adc92e0c
SHA1

12c9eb2e4c0b014356112a40cde6f4ff6ea5af6b
SHA256

798b09042289ed11db467e8c1d239b68e9ae1cf1f73401e5bf2bdc95bcc8a123
SHA512

37b8c133ca63e3f32e44d1417d3d6f7ff6c682696012bbedc65d07e0773ec9d70a9e12e519b9368ccc1bdf6273edb63d5b797b7b3e7c1bf749f42ed08052bef6
SSDEEP

49152:Rwcx9pgRLTOTnqEOEvERC2F9L0ViBBM84yv8Pdm/c7YrFUJUUUUUUU:Rwcx9pgRLTOT3dERjUJUUUUUUU

Score

10^/10

asyncrat stormkitty rat stealer

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 2 IoCs

Processes:

resource	yara_rule
behavioral29/memory/4544-1-0x0000000000A70000-0x0000000000CBA000-memory.dmp	family_stormkitty
C:\Users\Admin\AppData\Roaming\Wihnup.exe	family_stormkitty

Stormkitty family
stormkitty

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
C:\Users\Admin\AppData\Roaming\Wihnup.exe	family_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

Processes:

pthjadh.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation pthjadh.exe
Executes dropped EXE 1 IoCs

Processes:

Wihnup.exe

pid process

1540 Wihnup.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

4652 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

Processes:

schtasks.exe

pid process

4588 schtasks.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	pthjadh.exe

pid	process
1540	Wihnup.exe

pid	process
4652	timeout.exe

pid	process
4588	schtasks.exe

Suspicious behavior: EnumeratesProcesses 49 IoCs

Processes:

pthjadh.exeWihnup.exe

pid	process
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
4544	pthjadh.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe
1540	Wihnup.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

pthjadh.exeWihnup.exe

description pid process

Token: SeDebugPrivilege 4544 pthjadh.exe
Token: SeDebugPrivilege 1540 Wihnup.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

Wihnup.exe

pid process

1540 Wihnup.exe

description	pid	process
Token: SeDebugPrivilege	4544	pthjadh.exe
Token: SeDebugPrivilege	1540	Wihnup.exe

pid	process
1540	Wihnup.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

pthjadh.execmd.execmd.exe

description	pid	process	target process
PID 4544 wrote to memory of 4896	4544	pthjadh.exe	cmd.exe
PID 4544 wrote to memory of 4896	4544	pthjadh.exe	cmd.exe
PID 4544 wrote to memory of 3884	4544	pthjadh.exe	cmd.exe
PID 4544 wrote to memory of 3884	4544	pthjadh.exe	cmd.exe
PID 4896 wrote to memory of 4588	4896	cmd.exe	schtasks.exe
PID 4896 wrote to memory of 4588	4896	cmd.exe	schtasks.exe
PID 3884 wrote to memory of 4652	3884	cmd.exe	timeout.exe
PID 3884 wrote to memory of 4652	3884	cmd.exe	timeout.exe
PID 3884 wrote to memory of 1540	3884	cmd.exe	Wihnup.exe
PID 3884 wrote to memory of 1540	3884	cmd.exe	Wihnup.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\start-main\pthjadh.exe
"C:\Users\Admin\AppData\Local\Temp\start-main\pthjadh.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4544

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Wihnup" /tr '"C:\Users\Admin\AppData\Roaming\Wihnup.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:4896

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "Wihnup" /tr '"C:\Users\Admin\AppData\Roaming\Wihnup.exe"'
3⤵
- Scheduled Task/Job: Scheduled Task
PID:4588

C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC3CD.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:3884

C:\Windows\system32\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:4652

C:\Users\Admin\AppData\Roaming\Wihnup.exe
"C:\Users\Admin\AppData\Roaming\Wihnup.exe"
3⤵
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:1540

Network

MITRE ATT&CK Enterprise v15

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

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpC3CD.tmp.bat

Filesize
150B

MD5
b6d53d9d3740a13cc26dcafe0f7c8353

SHA1
fc355d0283440335f0ebe981f02b4e7abfeccef9

SHA256
64859e0cee2bf861443f3a5aeb07ca3a393c6297af6ce488aa5a209c15dd5325

SHA512
1390b552287ddce2f6232a01cb755eaa5dba5fabd60351ca94c47b741f8c0232a6d3c639a5286452ebc6e8ac26712f997aa51b48276d42c723582717f54bec9d

Download Submit
C:\Users\Admin\AppData\Roaming\DataLogs\DataLogs.conf

Filesize
8B

MD5
cf759e4c5f14fe3eec41b87ed756cea8

SHA1
c27c796bb3c2fac929359563676f4ba1ffada1f5

SHA256
c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

SHA512
c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

Download Submit
C:\Users\Admin\AppData\Roaming\Wihnup.exe

Filesize
2.3MB

MD5
9c044a232b3f817c3b91ce10adc92e0c

SHA1
12c9eb2e4c0b014356112a40cde6f4ff6ea5af6b

SHA256
798b09042289ed11db467e8c1d239b68e9ae1cf1f73401e5bf2bdc95bcc8a123

SHA512
37b8c133ca63e3f32e44d1417d3d6f7ff6c682696012bbedc65d07e0773ec9d70a9e12e519b9368ccc1bdf6273edb63d5b797b7b3e7c1bf749f42ed08052bef6

Download Submit
memory/4544-0-0x00007FFAABDD3000-0x00007FFAABDD5000-memory.dmp

Filesize
8KB

Download
memory/4544-1-0x0000000000A70000-0x0000000000CBA000-memory.dmp

Filesize
2.3MB

Download
memory/4544-3-0x00007FFAABDD0000-0x00007FFAAC891000-memory.dmp

Filesize
10.8MB

Download
memory/4544-8-0x00007FFAABDD0000-0x00007FFAAC891000-memory.dmp

Filesize
10.8MB

Download
memory/4544-9-0x00007FFAABDD0000-0x00007FFAAC891000-memory.dmp

Filesize
10.8MB

Download