asyncrat | cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04

General

Target
cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
Size 45KB
Sample260531-wpw89adw2w
SHA256 cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04
MD5 9ebf4ab9ce3d8021b991f68efaf108b5
SHA1 871482ebefc45288f1bd7a7cd9f96aa9da69cbca
SHA512 1b1645987121c4c10ce85ebce944c089ec4a90884c1707668dbeef98de7b1827e93bbfa94081040645b92b417af77d81ac887233e52ecbd3086d2e029a866609
SSDEEP 768:4uBqJTMUyYUWUWBDimo2qVvLiE02FjMdjYkkmPIVzjbvgX3ijfvSwS+AHZsH2KaC:4uBqJTMpv2CL9wQPV3bYXSjH1S75yytC
TLSH
T156232A0037E9812BF2BE4FB469F25245867AF2732603D5491C8451DB5623BC69A436FE
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

viwap.blog:443
viwap.blog:80
viwap.blog:7797
viwap.blog:8707
viwap.blog:6620
www.viwap.blog:443
www.viwap.blog:80
www.viwap.blog:7797
www.viwap.blog:8707
www.viwap.blog:6620
sodinokibi.viwap.blog:443
sodinokibi.viwap.blog:80
sodinokibi.viwap.blog:7797
sodinokibi.viwap.blog:8707
sodinokibi.viwap.blog:6620
malware.viwap.blog:443
malware.viwap.blog:80
malware.viwap.blog:7797
malware.viwap.blog:8707
malware.viwap.blog:6620
downadup.viwap.blog:443
downadup.viwap.blog:80
downadup.viwap.blog:7797
downadup.viwap.blog:8707
downadup.viwap.blog:6620
klez.viwap.blog:443
klez.viwap.blog:80
klez.viwap.blog:7797
klez.viwap.blog:8707
klez.viwap.blog:6620

Mutex

KbQzlIvlbkFz

Attributes

delay
0
install
true
install_file
13r5.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
1600	13r5.exe
4776	13r5.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	13r5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	13r5.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
4860	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
5100	schtasks.exe

Suspicious behavior: EnumeratesProcesses 19 IoCs

pid	Process
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
Token: SeDebugPrivilege	1600	13r5.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 4432 wrote to memory of 2008	4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe	83
PID 4432 wrote to memory of 3808	4432	cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe	85
PID 2008 wrote to memory of 5100	2008	cmd.exe	87
PID 3808 wrote to memory of 4860	3808	cmd.exe	88
PID 3808 wrote to memory of 4776	3808	cmd.exe	91

C:\Users\Admin\AppData\Local\Temp\cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe
"C:\Users\Admin\AppData\Local\Temp\cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4432
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "13r5" /tr '"C:\Users\Admin\AppData\Roaming\13r5.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2008
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "13r5" /tr '"C:\Users\Admin\AppData\Roaming\13r5.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5100
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp86CF.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3808
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4860
- - C:\Users\Admin\AppData\Roaming\13r5.exe
    "C:\Users\Admin\AppData\Roaming\13r5.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4776

C:\Users\Admin\AppData\Roaming\13r5.exe
"C:\Users\Admin\AppData\Roaming\13r5.exe"
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:1600

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

tmp86CF.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp86CF.tmp.bat
Size 148B
SHA256 a8d15529612770e0238ba569549b0ee52044d77dab978a2d9e66e35e35c4b6cb
MD5 eb69a4c9c105972c45ed424bc84406dc
SHA1 f8b612394b921a60719546f1b5fe67ff0a6da6c9
SHA512 ab744d84d2d7c46e34d04b48784eb4cf2243218ad776e0239937007f192ffc005478d36d6bf54f6b1fe46d4615933e88b49e85753a9eee5699b09d057bf4baa4
TLSH
T174C08C4251C5AA1F280A782302FAD89C91A268193E42AB00830440492280848F099342
MD5 SHA1 SHA512 TLSH

Submit Download

13r5.exe

Path C:\Users\Admin\AppData\Roaming\13r5.exe
Size 45KB
SHA256 cf2df8d97f5d6a16788962e2da10c7f0b621b940bbfcacbfcb385caf1b50af04
MD5 9ebf4ab9ce3d8021b991f68efaf108b5
SHA1 871482ebefc45288f1bd7a7cd9f96aa9da69cbca
SHA512 1b1645987121c4c10ce85ebce944c089ec4a90884c1707668dbeef98de7b1827e93bbfa94081040645b92b417af77d81ac887233e52ecbd3086d2e029a866609
SSDEEP 768:4uBqJTMUyYUWUWBDimo2qVvLiE02FjMdjYkkmPIVzjbvgX3ijfvSwS+AHZsH2KaC:4uBqJTMpv2CL9wQPV3bYXSjH1S75yytC
TLSH
T156232A0037E9812BF2BE4FB469F25245867AF2732603D5491C8451DB5623BC69A436FE
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/4432-0-0x0000000000190000-0x00000000001A2000-memory.dmp

Download

memory/4432-1-0x0000000004DA0000-0x0000000004DB0000-memory.dmp

Download

memory/4432-2-0x0000000004C90000-0x0000000004D2C000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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