asyncrat | c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d

General

Target

c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exe
Size

9.2MB
MD5

8b5037f5be44b50fd1ec4c8b089dd6a4
SHA1

e5aaa6222b7c3347224feeed3c237a4d19039a4c
SHA256

c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d
SHA512

508409fe3e0cb07231b79b15f49f8de008e21f2e156afc9c979c45af4e0193cf79ac4faebf94830ab7d7db355328560f1c6f7549478d3d1038408897dc508bc1

Score

10^/10

asyncrat default persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

eds.edspeck.org:7707

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.
rat asyncrat

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/2300-148-0x0000000000620000-0x0000000000632000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

Processes:

App Update.exe

pid process

4464 App Update.exe

pid	process
4464	App Update.exe

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exeApp Update.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	App Update.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
Set value (str)	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\RuntimeBroker = "C:\\Users\\Admin\\AppData\\Roaming\\App Update.exe"	reg.exe
Key created	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Software\Microsoft\Windows\CurrentVersion\Run	reg.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

App Update.exe

description pid process target process

PID 4464 set thread context of 2300 4464 App Update.exe RegAsm.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exeApp Update.exe

pid process

3092 c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exe
4464 App Update.exe

description	pid	process	target process
PID 4464 set thread context of 2300	4464	App Update.exe	RegAsm.exe

pid	process
3092	c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exe
4464	App Update.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exeApp Update.exe

description	pid	process
Token: SeDebugPrivilege	3092	c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exe
Token: SeDebugPrivilege	4464	App Update.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.execmd.exeApp Update.execmd.exe

description	pid	process	target process
PID 3092 wrote to memory of 2716	3092	c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exe	cmd.exe
PID 3092 wrote to memory of 2716	3092	c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exe	cmd.exe
PID 3092 wrote to memory of 2716	3092	c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exe	cmd.exe
PID 3092 wrote to memory of 3412	3092	c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exe	cmd.exe
PID 3092 wrote to memory of 3412	3092	c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exe	cmd.exe
PID 3092 wrote to memory of 3412	3092	c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exe	cmd.exe
PID 3412 wrote to memory of 4464	3412	cmd.exe	App Update.exe
PID 3412 wrote to memory of 4464	3412	cmd.exe	App Update.exe
PID 3412 wrote to memory of 4464	3412	cmd.exe	App Update.exe
PID 4464 wrote to memory of 4700	4464	App Update.exe	cmd.exe
PID 4464 wrote to memory of 4700	4464	App Update.exe	cmd.exe
PID 4464 wrote to memory of 4700	4464	App Update.exe	cmd.exe
PID 4700 wrote to memory of 4196	4700	cmd.exe	reg.exe
PID 4700 wrote to memory of 4196	4700	cmd.exe	reg.exe
PID 4700 wrote to memory of 4196	4700	cmd.exe	reg.exe
PID 4464 wrote to memory of 2300	4464	App Update.exe	RegAsm.exe
PID 4464 wrote to memory of 2300	4464	App Update.exe	RegAsm.exe
PID 4464 wrote to memory of 2300	4464	App Update.exe	RegAsm.exe
PID 4464 wrote to memory of 2300	4464	App Update.exe	RegAsm.exe
PID 4464 wrote to memory of 2300	4464	App Update.exe	RegAsm.exe
PID 4464 wrote to memory of 2300	4464	App Update.exe	RegAsm.exe
PID 4464 wrote to memory of 2300	4464	App Update.exe	RegAsm.exe
PID 4464 wrote to memory of 2300	4464	App Update.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exe
"C:\Users\Admin\AppData\Local\Temp\c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exe"
1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3092

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c copy "C:\Users\Admin\AppData\Local\Temp\c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d.exe" "C:\Users\Admin\AppData\Roaming\App Update.exe"
2⤵
PID:2716

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c, "C:\Users\Admin\AppData\Roaming\App Update.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:3412

C:\Users\Admin\AppData\Roaming\App Update.exe
"C:\Users\Admin\AppData\Roaming\App Update.exe"
3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4464

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "RuntimeBroker" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\App Update.exe"
4⤵
- Suspicious use of WriteProcessMemory
PID:4700

C:\Windows\SysWOW64\reg.exe
REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "RuntimeBroker" /t REG_SZ /d "C:\Users\Admin\AppData\Roaming\App Update.exe"
5⤵
- Adds Run key to start application
PID:4196

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
4⤵
PID:2300

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

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\App Update.exe
Filesize
9.2MB

MD5
8b5037f5be44b50fd1ec4c8b089dd6a4

SHA1
e5aaa6222b7c3347224feeed3c237a4d19039a4c

SHA256
c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d

SHA512
508409fe3e0cb07231b79b15f49f8de008e21f2e156afc9c979c45af4e0193cf79ac4faebf94830ab7d7db355328560f1c6f7549478d3d1038408897dc508bc1

Download Submit
C:\Users\Admin\AppData\Roaming\App Update.exe
Filesize
9.2MB

MD5
8b5037f5be44b50fd1ec4c8b089dd6a4

SHA1
e5aaa6222b7c3347224feeed3c237a4d19039a4c

SHA256
c3ecf46a0d8bcdeadcc4de5d1e04412a8bd3a4c8bfd00ed55c44edf7e014021d

SHA512
508409fe3e0cb07231b79b15f49f8de008e21f2e156afc9c979c45af4e0193cf79ac4faebf94830ab7d7db355328560f1c6f7549478d3d1038408897dc508bc1

Download Submit
memory/2300-148-0x0000000000620000-0x0000000000632000-memory.dmp

Filesize
72KB

Download
memory/2300-146-0x0000000000000000-mapping.dmp

Download
memory/2716-138-0x0000000000000000-mapping.dmp

Download
memory/3092-134-0x000000000AB20000-0x000000000AB86000-memory.dmp

Filesize
408KB

Download
memory/3092-136-0x000000000BA70000-0x000000000BF9C000-memory.dmp

Filesize
5.2MB

Download
memory/3092-137-0x000000000B2F0000-0x000000000B312000-memory.dmp

Filesize
136KB

Download
memory/3092-130-0x0000000000220000-0x0000000000B56000-memory.dmp

Filesize
9.2MB

Download
memory/3092-135-0x000000000B370000-0x000000000B532000-memory.dmp

Filesize
1.8MB

Download
memory/3092-133-0x0000000007E40000-0x0000000007ED2000-memory.dmp

Filesize
584KB

Download
memory/3092-132-0x00000000082F0000-0x0000000008894000-memory.dmp

Filesize
5.6MB

Download
memory/3092-131-0x0000000005530000-0x00000000055CC000-memory.dmp

Filesize
624KB

Download
memory/3412-139-0x0000000000000000-mapping.dmp

Download
memory/4196-144-0x0000000000000000-mapping.dmp

Download
memory/4464-140-0x0000000000000000-mapping.dmp

Download
memory/4464-145-0x000000000A7F0000-0x000000000A812000-memory.dmp

Filesize
136KB

Download
memory/4700-143-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads