asyncrat | bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f

General

Target
bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
Size 45KB
Sample260601-vg366acw2q
SHA256 bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f
MD5 f89b05fd7a19d74b82b23aeb4b784c71
SHA1 f88a46ecfc9e3ffc052fe527508162acd191ada7
SHA512 7e78f163221089ceb26eb01e5e6c84ebb415a1d188512a4928bee98d27a73bbe7efc85b91e2a5d698f6b5d5491dc0474eff5f4bec3083c5a74007a9f8c208d80
SSDEEP 768:xuRXNT9gGHBWUZohrmo2q9Pozfy3CKPIDxjbGgX3iawh96asBBDZzx:xuRXNT9Bw2RTRDhbZXSDcT/dzx
TLSH
T191233C003BE9812BF2BF4F789DF26105867AF6672A03D6491CC411DB5713BC68A526FE
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

C2

phimsetvietnam.vip:443
phimsetvietnam.vip:80
phimsetvietnam.vip:7797
phimsetvietnam.vip:8707
phimsetvietnam.vip:6620
www.phimsetvietnam.vip:443
www.phimsetvietnam.vip:80
www.phimsetvietnam.vip:7797
www.phimsetvietnam.vip:8707
www.phimsetvietnam.vip:6620
cl0p.phimsetvietnam.vip:443
cl0p.phimsetvietnam.vip:80
cl0p.phimsetvietnam.vip:7797
cl0p.phimsetvietnam.vip:8707
cl0p.phimsetvietnam.vip:6620
gozi.phimsetvietnam.vip:443
gozi.phimsetvietnam.vip:80
gozi.phimsetvietnam.vip:7797
gozi.phimsetvietnam.vip:8707
gozi.phimsetvietnam.vip:6620

Mutex

9LbVU7AkzMeM

Attributes

delay
0
install
true
install_file
ieitumc.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/0x000300000002a213-8.dat	family_asyncrat

Executes dropped EXE 2 IoCs

pid	Process
1380	ieitumc.exe
3840	ieitumc.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	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ieitumc.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ieitumc.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3944	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
3292	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
Token: SeDebugPrivilege	1380	ieitumc.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 440 wrote to memory of 3392	440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe	83
PID 440 wrote to memory of 2548	440	bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe	85
PID 2548 wrote to memory of 3944	2548	cmd.exe	87
PID 3392 wrote to memory of 3292	3392	cmd.exe	88
PID 2548 wrote to memory of 3840	2548	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe
"C:\Users\Admin\AppData\Local\Temp\bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:440
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ieitumc" /tr '"C:\Users\Admin\AppData\Roaming\ieitumc.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3392
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ieitumc" /tr '"C:\Users\Admin\AppData\Roaming\ieitumc.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3292
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7450.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2548
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3944
- - C:\Users\Admin\AppData\Roaming\ieitumc.exe
    "C:\Users\Admin\AppData\Roaming\ieitumc.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:3840

C:\Users\Admin\AppData\Roaming\ieitumc.exe
"C:\Users\Admin\AppData\Roaming\ieitumc.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1380

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmp7450.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp7450.tmp.bat
Size 151B
SHA256 ac7f701a7f20700c9b9256770d993db599554cb651b7ba6061b846190ffec101
MD5 db1010056f9807e11815da3ebdfabb8b
SHA1 81e6f2f939ff023183a37762068aef14018f0f71
SHA512 a30e2605b5c0c398c149443a8de748ec8b2242ee94750e9054af21a4c186455d2ca9aaabc776519c1be945a4d1d3e44d28784d3489c8ab331f42118dcd9d5719
TLSH
T1B1C02B436AC6FB0E2806542706FED9CC9172BC5A3F40BB40C308400D36804CAF4DD345
MD5 SHA1 SHA512 TLSH

Submit Download

ieitumc.exe

Path C:\Users\Admin\AppData\Roaming\ieitumc.exe
Size 45KB
SHA256 bc5dd0d1575eb7801ad60aecc31c06817629abe248b0cdc0709247cc8bc7765f
MD5 f89b05fd7a19d74b82b23aeb4b784c71
SHA1 f88a46ecfc9e3ffc052fe527508162acd191ada7
SHA512 7e78f163221089ceb26eb01e5e6c84ebb415a1d188512a4928bee98d27a73bbe7efc85b91e2a5d698f6b5d5491dc0474eff5f4bec3083c5a74007a9f8c208d80
SSDEEP 768:xuRXNT9gGHBWUZohrmo2q9Pozfy3CKPIDxjbGgX3iawh96asBBDZzx:xuRXNT9Bw2RTRDhbZXSDcT/dzx
TLSH
T191233C003BE9812BF2BF4F789DF26105867AF6672A03D6491CC411DB5713BC68A526FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/440-0-0x0000000000CF0000-0x0000000000D02000-memory.dmp

Download

memory/440-1-0x0000000005880000-0x0000000005890000-memory.dmp

Download

memory/440-2-0x00000000057D0000-0x000000000586C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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