asyncrat | ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf

General

Target
ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
Size 45KB
Sample260817-sd9testvfw
SHA256 ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf
MD5 c8f81af59916c36f5ecd47867b71eba8
SHA1 fc2f2f55ac4213633e9dff0ce256e727e64d9c18
SHA512 b5ece8f3b744f35fe6c01bb3b879488ea832e1988a94bc65d1338008ebf0896ea18d41aba9712e7fea08bbefd06aa203e503a290ee3f84b9586c2c2a260259ee
SSDEEP 768:EufspTfzcR6uWUcb+wmo2q9oozHyvCKPIihjbKgX3idZY+gTgWnPfemBDZsx:EufspTf2g20L5ixbdXSdgHPzdsx
TLSH
T189232B003BE8C12BF2BF4F789DF26145467AF6632A03D5491CC4119B5723BC69A52AFE
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

default command_and_control defense_evasion discovery execution asyncrat persistence rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

ads.zorvec.name:80
ads.zorvec.name:22
ads.zorvec.name:8080
ads.zorvec.name:8880
ads.zorvec.name:2052
ads.zorvec.name:2082
ads.zorvec.name:2086
ads.zorvec.name:2095
ads.zorvec.name:443
ads.zorvec.name:2053
ads.zorvec.name:2083
ads.zorvec.name:2087
ads.zorvec.name:2096
ads.zorvec.name:8443
www.ads.zorvec.name:80
www.ads.zorvec.name:22
www.ads.zorvec.name:8080
www.ads.zorvec.name:8880
www.ads.zorvec.name:2052
www.ads.zorvec.name:2082
www.ads.zorvec.name:2086
www.ads.zorvec.name:2095
www.ads.zorvec.name:443
www.ads.zorvec.name:2053
www.ads.zorvec.name:2083
www.ads.zorvec.name:2087
www.ads.zorvec.name:2096
www.ads.zorvec.name:8443
iloveyou.ads.zorvec.name:80
iloveyou.ads.zorvec.name:22
iloveyou.ads.zorvec.name:8080
iloveyou.ads.zorvec.name:8880
iloveyou.ads.zorvec.name:2052
iloveyou.ads.zorvec.name:2082
iloveyou.ads.zorvec.name:2086
iloveyou.ads.zorvec.name:2095
iloveyou.ads.zorvec.name:443
iloveyou.ads.zorvec.name:2053
iloveyou.ads.zorvec.name:2083
iloveyou.ads.zorvec.name:2087
iloveyou.ads.zorvec.name:2096
iloveyou.ads.zorvec.name:8443
stuxnet.ads.zorvec.name:80
stuxnet.ads.zorvec.name:22
stuxnet.ads.zorvec.name:8080
stuxnet.ads.zorvec.name:8880
stuxnet.ads.zorvec.name:2052
stuxnet.ads.zorvec.name:2082
stuxnet.ads.zorvec.name:2086
stuxnet.ads.zorvec.name:2095
stuxnet.ads.zorvec.name:443
stuxnet.ads.zorvec.name:2053
stuxnet.ads.zorvec.name:2083
stuxnet.ads.zorvec.name:2087
stuxnet.ads.zorvec.name:2096
stuxnet.ads.zorvec.name:8443
mydoom.ads.zorvec.name:80
mydoom.ads.zorvec.name:22
mydoom.ads.zorvec.name:8080
mydoom.ads.zorvec.name:8880
mydoom.ads.zorvec.name:2052
mydoom.ads.zorvec.name:2082
mydoom.ads.zorvec.name:2086
mydoom.ads.zorvec.name:2095
mydoom.ads.zorvec.name:443
mydoom.ads.zorvec.name:2053
mydoom.ads.zorvec.name:2083
mydoom.ads.zorvec.name:2087
mydoom.ads.zorvec.name:2096
mydoom.ads.zorvec.name:8443

Mutex

nt9HMSFaDv0k

Attributes

delay
0
install
true
install_file
ijufb3a.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 2 IoCs

rat

resource	yara_rule
behavioral1/files/0x0006000000009dd1-8.dat	family_asyncrat
behavioral1/memory/4988-10-0x0000000004A70000-0x0000000004A80000-memory.dmp	family_asyncrat

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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-540052884-2969440504-464782435-1000\Control Panel\International\Geo\Nation	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe

Executes dropped EXE 2 IoCs

pid	Process
4988	ijufb3a.exe
5104	ijufb3a.exe

Outbound SSH connection to public host 2 TTPs 2 IoCs

SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

command_and_control

Protocol Tunneling

T1572

Network Service Discovery

T1046

description	flow	ioc	pid	Process
SSH destination	62	104.21.28.44:22	4988	ijufb3a.exe
SSH destination	67	172.67.144.58:22	4988	ijufb3a.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Executes a command shell one-liner 1 TTPs 2 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
2980	cmd.exe
4032	cmd.exe

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	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	ijufb3a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ijufb3a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
3120	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
2264	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
Token: SeDebugPrivilege	4988	ijufb3a.exe

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 744 wrote to memory of 2980	744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe	85
PID 744 wrote to memory of 4032	744	ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe	87
PID 4032 wrote to memory of 3120	4032	cmd.exe	89
PID 2980 wrote to memory of 2264	2980	cmd.exe	90
PID 4032 wrote to memory of 5104	4032	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe
"C:\Users\Admin\AppData\Local\Temp\ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:744
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "ijufb3a" /tr '"C:\Users\Admin\AppData\Roaming\ijufb3a.exe"' & exit
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2980
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "ijufb3a" /tr '"C:\Users\Admin\AppData\Roaming\ijufb3a.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:2264
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp1364.tmp.bat""
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4032
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3120
- - C:\Users\Admin\AppData\Roaming\ijufb3a.exe
    "C:\Users\Admin\AppData\Roaming\ijufb3a.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:5104

C:\Users\Admin\AppData\Roaming\ijufb3a.exe
"C:\Users\Admin\AppData\Roaming\ijufb3a.exe"
1⤵
- Executes dropped EXE
- Outbound SSH connection to public host
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
PID:4988

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

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

Network Service Discovery

Query Registry

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Protocol Tunneling

1

T1572

Exfiltration

Impact

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tmp1364.tmp.bat

Path C:\Users\Admin\AppData\Local\Temp\tmp1364.tmp.bat
Size 151B
SHA256 5391b01d057ee9d2da86c020aef19035f892cf3d22cb2dbe923a23f75ed5ad18
MD5 624cc493e250655b8c70fee8d2dfb5fb
SHA1 2e43c959babb465d28f5928afe7e616528c58906
SHA512 2e2a608e33eb8ca73d9b283b7a7f97678e4b8e22034a05a6e888a663fc3a85875d6d7ed4115adfc273076fe8ade515e31963cf934c1aa2cce6af9676903bd5e8
TLSH
T1E4C08C4291C6AA8E6809245302BAD58CA1636D993E84BB008304808A1680489F099285
MD5 SHA1 SHA512 TLSH

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ijufb3a.exe

Path C:\Users\Admin\AppData\Roaming\ijufb3a.exe
Size 45KB
SHA256 ad4d448328dcf98a7353b4ae45715546a73bfe0f04be6ab6afb464c5cffdb2bf
MD5 c8f81af59916c36f5ecd47867b71eba8
SHA1 fc2f2f55ac4213633e9dff0ce256e727e64d9c18
SHA512 b5ece8f3b744f35fe6c01bb3b879488ea832e1988a94bc65d1338008ebf0896ea18d41aba9712e7fea08bbefd06aa203e503a290ee3f84b9586c2c2a260259ee
SSDEEP 768:EufspTfzcR6uWUcb+wmo2q9oozHyvCKPIihjbKgX3idZY+gTgWnPfemBDZsx:EufspTf2g20L5ixbdXSdgHPzdsx
TLSH
T189232B003BE8C12BF2BF4F789DF26145467AF6632A03D5491CC4119B5723BC69A52AFE
MD5 SHA1 SHA512 SSDEEP TLSH

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memory/744-0-0x00000000005E0000-0x00000000005F2000-memory.dmp

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memory/744-1-0x0000000005010000-0x0000000005020000-memory.dmp

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memory/744-2-0x0000000005020000-0x00000000050BC000-memory.dmp

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memory/4988-10-0x0000000004A70000-0x0000000004A80000-memory.dmp

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memory/4988-13-0x0000000004A70000-0x0000000004A80000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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