asyncrat | 65b748276b7dea04af2f7f40ca1d08a1395c0de73734c82c581953b9213dc1a9

General

Target

Doc#662020094753525765678.exe
Size

301KB
MD5

9b70f0dee9fa7de571b2c08a6f3a9a75
SHA1

f3ad5f3cabe73c60c795c3367faaca682ddc1cc9
SHA256

249b086fbb970eefa5bc4c9bcebcda1e8a638ed82a1bbf1a106cfe3807e3e121
SHA512

2d47ea2d01e5643e5e5bec7e4b44e2c6cbc5c69f233bef27def943343403733a484baa58b90699f8ca29be52086750d505c47d876f8076ca363797be2f5badd7

Score

10^/10

asyncrat direct persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

DIRECT

Mutex

chizzy25@@!7^UPCAZ

Attributes

delay
3
install
false
install_folder
%AppData%
pastebin_config
https://pastebin.com/raw/HKYwiN9V

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers.
rat asyncrat

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/2196-144-0x0000000000190000-0x00000000001A2000-memory.dmp	asyncrat

Executes dropped EXE 2 IoCs

Processes:

dwrn.exeAddInProcess32.exe

pid process

4808 dwrn.exe
2196 AddInProcess32.exe

pid	process
4808	dwrn.exe
2196	AddInProcess32.exe

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:

Doc#662020094753525765678.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Control Panel\International\Geo\Nation	Doc#662020094753525765678.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

reg.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2632097139-1792035885-811742494-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ggxdtysjyux = "C:\\Windows\\system32\\pcalua.exe -a C:\\Users\\Admin\\AppData\\Roaming\\dwrn.exe"	reg.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs

Web Service
T1102
Suspicious use of SetThreadContext 1 IoCs

Processes:

dwrn.exe

description pid process target process

PID 4808 set thread context of 2196 4808 dwrn.exe AddInProcess32.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	pid	process	target process
PID 4808 set thread context of 2196	4808	dwrn.exe	AddInProcess32.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

Processes:

Doc#662020094753525765678.exedwrn.exe

pid	process
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
3688	Doc#662020094753525765678.exe
4808	dwrn.exe
4808	dwrn.exe
4808	dwrn.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Doc#662020094753525765678.exedwrn.exeAddInProcess32.exe

description	pid	process
Token: SeDebugPrivilege	3688	Doc#662020094753525765678.exe
Token: SeDebugPrivilege	4808	dwrn.exe
Token: SeDebugPrivilege	2196	AddInProcess32.exe

Suspicious use of WriteProcessMemory 17 IoCs

Processes:

Doc#662020094753525765678.execmd.exedwrn.exe

description	pid	process	target process
PID 3688 wrote to memory of 4864	3688	Doc#662020094753525765678.exe	cmd.exe
PID 3688 wrote to memory of 4864	3688	Doc#662020094753525765678.exe	cmd.exe
PID 3688 wrote to memory of 4864	3688	Doc#662020094753525765678.exe	cmd.exe
PID 4864 wrote to memory of 4936	4864	cmd.exe	reg.exe
PID 4864 wrote to memory of 4936	4864	cmd.exe	reg.exe
PID 4864 wrote to memory of 4936	4864	cmd.exe	reg.exe
PID 3688 wrote to memory of 4808	3688	Doc#662020094753525765678.exe	dwrn.exe
PID 3688 wrote to memory of 4808	3688	Doc#662020094753525765678.exe	dwrn.exe
PID 3688 wrote to memory of 4808	3688	Doc#662020094753525765678.exe	dwrn.exe
PID 4808 wrote to memory of 2196	4808	dwrn.exe	AddInProcess32.exe
PID 4808 wrote to memory of 2196	4808	dwrn.exe	AddInProcess32.exe
PID 4808 wrote to memory of 2196	4808	dwrn.exe	AddInProcess32.exe
PID 4808 wrote to memory of 2196	4808	dwrn.exe	AddInProcess32.exe
PID 4808 wrote to memory of 2196	4808	dwrn.exe	AddInProcess32.exe
PID 4808 wrote to memory of 2196	4808	dwrn.exe	AddInProcess32.exe
PID 4808 wrote to memory of 2196	4808	dwrn.exe	AddInProcess32.exe
PID 4808 wrote to memory of 2196	4808	dwrn.exe	AddInProcess32.exe

C:\Users\Admin\AppData\Local\Temp\Doc#662020094753525765678.exe
"C:\Users\Admin\AppData\Local\Temp\Doc#662020094753525765678.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3688

C:\Windows\SysWOW64\cmd.exe
"cmd.exe" /c REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v ggxdtysjyux /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\dwrn.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:4864

C:\Windows\SysWOW64\reg.exe
REG ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run /f /v ggxdtysjyux /t REG_SZ /d C:\Windows\system32\pcalua.exe" -a C:\Users\Admin\AppData\Roaming\dwrn.exe"
3⤵
- Adds Run key to start application
PID:4936

C:\Users\Admin\AppData\Roaming\dwrn.exe
"C:\Users\Admin\AppData\Roaming\dwrn.exe"
2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4808

C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
"C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2196

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Web Service

1

T1102

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
Filesize
42KB

MD5
9827ff3cdf4b83f9c86354606736ca9c

SHA1
e73d73f42bb2a310f03eb1bcbb22be2b8eb7c723

SHA256
c1cf3dc8fa1c7fc00f88e07ad539979b3706ca8d69223cffd1d58bc8f521f63a

SHA512
8261828d55f3b5134c0aeb98311c04e20c5395d4347251746f3be0fb854f36cc7e118713cd00c9867537e6e47d5e71f2b2384fc00c67f0ae1b285b8310321579

Download Submit
C:\Users\Admin\AppData\Local\Temp\AddInProcess32.exe
Filesize
42KB

MD5
9827ff3cdf4b83f9c86354606736ca9c

SHA1
e73d73f42bb2a310f03eb1bcbb22be2b8eb7c723

SHA256
c1cf3dc8fa1c7fc00f88e07ad539979b3706ca8d69223cffd1d58bc8f521f63a

SHA512
8261828d55f3b5134c0aeb98311c04e20c5395d4347251746f3be0fb854f36cc7e118713cd00c9867537e6e47d5e71f2b2384fc00c67f0ae1b285b8310321579

Download Submit
C:\Users\Admin\AppData\Roaming\dwrn.exe
Filesize
301KB

MD5
9b70f0dee9fa7de571b2c08a6f3a9a75

SHA1
f3ad5f3cabe73c60c795c3367faaca682ddc1cc9

SHA256
249b086fbb970eefa5bc4c9bcebcda1e8a638ed82a1bbf1a106cfe3807e3e121

SHA512
2d47ea2d01e5643e5e5bec7e4b44e2c6cbc5c69f233bef27def943343403733a484baa58b90699f8ca29be52086750d505c47d876f8076ca363797be2f5badd7

Download Submit
C:\Users\Admin\AppData\Roaming\dwrn.exe
Filesize
301KB

MD5
9b70f0dee9fa7de571b2c08a6f3a9a75

SHA1
f3ad5f3cabe73c60c795c3367faaca682ddc1cc9

SHA256
249b086fbb970eefa5bc4c9bcebcda1e8a638ed82a1bbf1a106cfe3807e3e121

SHA512
2d47ea2d01e5643e5e5bec7e4b44e2c6cbc5c69f233bef27def943343403733a484baa58b90699f8ca29be52086750d505c47d876f8076ca363797be2f5badd7

Download Submit
memory/2196-144-0x0000000000190000-0x00000000001A2000-memory.dmp

Filesize
72KB

Download
memory/2196-140-0x0000000000000000-mapping.dmp

Download
memory/3688-133-0x0000000005680000-0x00000000056A2000-memory.dmp

Filesize
136KB

Download
memory/3688-134-0x00000000058E0000-0x0000000005972000-memory.dmp

Filesize
584KB

Download
memory/3688-130-0x0000000000C50000-0x0000000000CA0000-memory.dmp

Filesize
320KB

Download
memory/3688-132-0x0000000005630000-0x0000000005674000-memory.dmp

Filesize
272KB

Download
memory/3688-131-0x0000000005B50000-0x00000000060F4000-memory.dmp

Filesize
5.6MB

Download
memory/4808-137-0x0000000000000000-mapping.dmp

Download
memory/4864-135-0x0000000000000000-mapping.dmp

Download
memory/4936-136-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads