asyncrat | e079b3ba7c32c3c605ed795d257dad51fea2bb2c463cb04a2fb41f99ed7898bb

General

Target

E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
Size

852KB
MD5

5f76c9bd05993fdf6bd65c3fef5155fc
SHA1

e9d93be03d0acbb25c5eb94303bd260403ec673e
SHA256

e079b3ba7c32c3c605ed795d257dad51fea2bb2c463cb04a2fb41f99ed7898bb
SHA512

b258b402bf23dc0b8b35cd8364466993b694ae91c58f52095602eff5716e3bbe9fc86fcca0028b2474f1cf414a61c91c0ea0bac0ea1e047ce5932a7edd68d348

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.6D

Botnet

Default

C2

milla.publicvm.com:6606

milla.publicvm.com:7707

milla.publicvm.com:8808

Mutex

bdeyjxzfhfrvuzdyrin

Attributes

anti_vm
false
bsod
false
delay
1
install
true
install_file
firefoxa.exe
install_folder
%AppData%
pastebin_config
null

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/3536-123-0x0000000005770000-0x0000000005782000-memory.dmp	asyncrat

Executes dropped EXE 1 IoCs

Processes:

firefoxa.exe

pid process

4336 firefoxa.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exe

pid process

1632 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

364 timeout.exe

pid	process
4336	firefoxa.exe

pid	process
1632	schtasks.exe

pid	process
364	timeout.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

Processes:

E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe

pid	process
3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exefirefoxa.exe

description pid process

Token: SeDebugPrivilege 3536 E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
Token: SeDebugPrivilege 4336 firefoxa.exe

description	pid	process
Token: SeDebugPrivilege	3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
Token: SeDebugPrivilege	4336	firefoxa.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.execmd.execmd.exe

description	pid	process	target process
PID 3536 wrote to memory of 436	3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe	cmd.exe
PID 3536 wrote to memory of 436	3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe	cmd.exe
PID 3536 wrote to memory of 436	3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe	cmd.exe
PID 3536 wrote to memory of 3456	3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe	cmd.exe
PID 3536 wrote to memory of 3456	3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe	cmd.exe
PID 3536 wrote to memory of 3456	3536	E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe	cmd.exe
PID 3456 wrote to memory of 364	3456	cmd.exe	timeout.exe
PID 3456 wrote to memory of 364	3456	cmd.exe	timeout.exe
PID 3456 wrote to memory of 364	3456	cmd.exe	timeout.exe
PID 436 wrote to memory of 1632	436	cmd.exe	schtasks.exe
PID 436 wrote to memory of 1632	436	cmd.exe	schtasks.exe
PID 436 wrote to memory of 1632	436	cmd.exe	schtasks.exe
PID 3456 wrote to memory of 4336	3456	cmd.exe	firefoxa.exe
PID 3456 wrote to memory of 4336	3456	cmd.exe	firefoxa.exe
PID 3456 wrote to memory of 4336	3456	cmd.exe	firefoxa.exe

C:\Users\Admin\AppData\Local\Temp\E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe
"C:\Users\Admin\AppData\Local\Temp\E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB.exe"
1⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3536

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /ru system /rl highest /tn E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB /tr '"C:\Users\Admin\AppData\Roaming\firefoxa.exe"' & exit
2⤵
- Suspicious use of WriteProcessMemory
PID:436

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /ru system /rl highest /tn E079B3BA7C32C3C605ED795D257DAD51FEA2BB2C463CB /tr '"C:\Users\Admin\AppData\Roaming\firefoxa.exe"'
3⤵
- Creates scheduled task(s)
PID:1632

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpF657.tmp.bat""
2⤵
- Suspicious use of WriteProcessMemory
PID:3456

C:\Windows\SysWOW64\timeout.exe
timeout 3
3⤵
- Delays execution with timeout.exe
PID:364

C:\Users\Admin\AppData\Roaming\firefoxa.exe
"C:\Users\Admin\AppData\Roaming\firefoxa.exe"
3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:4336

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpF657.tmp.bat
MD5
1cb0cd1d3f728a484f1e7bb359c5c71d

SHA1
b9d657caf36a15ea0930f924b78d8befbd915d7c

SHA256
2b0d5d28ba78e47f23b78915a5f93f1439f0c41eb1e3e63e2939adc73f6f7dd5

SHA512
c1f80590e97588c40566a425bcdd95e6f85bf11c9fd76212e40887395cdb21a27dcd734196599bd25c54a1c16f1351d68259204ad4338c32deb2f4a0e695b422

Download Submit
C:\Users\Admin\AppData\Roaming\firefoxa.exe
MD5
5f76c9bd05993fdf6bd65c3fef5155fc

SHA1
e9d93be03d0acbb25c5eb94303bd260403ec673e

SHA256
e079b3ba7c32c3c605ed795d257dad51fea2bb2c463cb04a2fb41f99ed7898bb

SHA512
b258b402bf23dc0b8b35cd8364466993b694ae91c58f52095602eff5716e3bbe9fc86fcca0028b2474f1cf414a61c91c0ea0bac0ea1e047ce5932a7edd68d348

Download Submit
C:\Users\Admin\AppData\Roaming\firefoxa.exe
MD5
5f76c9bd05993fdf6bd65c3fef5155fc

SHA1
e9d93be03d0acbb25c5eb94303bd260403ec673e

SHA256
e079b3ba7c32c3c605ed795d257dad51fea2bb2c463cb04a2fb41f99ed7898bb

SHA512
b258b402bf23dc0b8b35cd8364466993b694ae91c58f52095602eff5716e3bbe9fc86fcca0028b2474f1cf414a61c91c0ea0bac0ea1e047ce5932a7edd68d348

Download Submit
memory/3536-118-0x0000000000ED0000-0x0000000000FAA000-memory.dmp

Filesize
872KB

Download
memory/3536-119-0x0000000005C60000-0x000000000615E000-memory.dmp

Filesize
5.0MB

Download
memory/3536-120-0x0000000005800000-0x0000000005892000-memory.dmp

Filesize
584KB

Download
memory/3536-121-0x0000000005940000-0x00000000059DC000-memory.dmp

Filesize
624KB

Download
memory/3536-122-0x0000000003380000-0x0000000003391000-memory.dmp

Filesize
68KB

Download
memory/3536-123-0x0000000005770000-0x0000000005782000-memory.dmp

Filesize
72KB

Download
memory/4336-127-0x00000000054B0000-0x00000000054B1000-memory.dmp

Filesize
4KB

Download
memory/4336-128-0x0000000006540000-0x00000000065A6000-memory.dmp

Filesize
408KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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