asyncrat | 804fb0f9b639fb03310d7cb96b74172d7dca3edcb1fc94b8caaa7cdad6d81e49

General

Target

msdtc.exe
Size

47KB
MD5

2731a98129622a67a970a173dda353ef
SHA1

4a705cfafbf7b1b543612203d09b16445a34887f
SHA256

804fb0f9b639fb03310d7cb96b74172d7dca3edcb1fc94b8caaa7cdad6d81e49
SHA512

0b471cac88b99408f9c653bf4feb0947e944c466b55931881790b64fcd6606b42e2960687208f0a7ea3d10b1df3c18cc51fdf8f6f197acdc4df1f293b28cf0fd
SSDEEP

768:8uX9m9T3YkeaWUMneAmo2qhtrKerR2L17BPIpvRIAe/o0b74e09w8Q1/znXTBDZl:8uX9m9T3Pg2ApXpvRO/Db7G9JQjdw+

Score

10^/10

asyncrat default discovery rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

87.120.113.125:6606

87.120.113.125:7707

87.120.113.125:8808

Mutex

NnE2Recf2msF

Attributes

delay
3
install
true
install_file
dwmm.exe
install_folder
%AppData%

aes.plain

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat

Async RAT payload 1 IoCs

rat

resource	yara_rule
behavioral2/files/0x0008000000023c8d-12.dat	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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	msdtc.exe

Executes dropped EXE 1 IoCs

pid	Process
1288	dwmm.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 6 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	dwmm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	msdtc.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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3656	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
3392	schtasks.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

pid	Process
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe
2980	msdtc.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	2980	msdtc.exe
Token: SeDebugPrivilege	1288	dwmm.exe
Token: SeDebugPrivilege	1288	dwmm.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2980 wrote to memory of 4060	2980	msdtc.exe	86
PID 2980 wrote to memory of 4060	2980	msdtc.exe	86
PID 2980 wrote to memory of 4060	2980	msdtc.exe	86
PID 2980 wrote to memory of 1524	2980	msdtc.exe	88
PID 2980 wrote to memory of 1524	2980	msdtc.exe	88
PID 2980 wrote to memory of 1524	2980	msdtc.exe	88
PID 1524 wrote to memory of 3656	1524	cmd.exe	90
PID 1524 wrote to memory of 3656	1524	cmd.exe	90
PID 1524 wrote to memory of 3656	1524	cmd.exe	90
PID 4060 wrote to memory of 3392	4060	cmd.exe	91
PID 4060 wrote to memory of 3392	4060	cmd.exe	91
PID 4060 wrote to memory of 3392	4060	cmd.exe	91
PID 1524 wrote to memory of 1288	1524	cmd.exe	92
PID 1524 wrote to memory of 1288	1524	cmd.exe	92
PID 1524 wrote to memory of 1288	1524	cmd.exe	92

C:\Users\Admin\AppData\Local\Temp\msdtc.exe
"C:\Users\Admin\AppData\Local\Temp\msdtc.exe"
1⤵
- Checks computer location settings
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2980
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dwmm" /tr '"C:\Users\Admin\AppData\Roaming\dwmm.exe"' & exit
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4060
- - C:\Windows\SysWOW64\schtasks.exe
    schtasks /create /f /sc onlogon /rl highest /tn "dwmm" /tr '"C:\Users\Admin\AppData\Roaming\dwmm.exe"'
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3392
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9E24.tmp.bat""
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1524
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:3656
- - C:\Users\Admin\AppData\Roaming\dwmm.exe
    "C:\Users\Admin\AppData\Roaming\dwmm.exe"
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    - Suspicious use of AdjustPrivilegeToken
    PID:1288

Network

MITRE ATT&CK Enterprise v15

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

Query Registry

1

T1012

System Information Discovery

2

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

C:\Users\Admin\AppData\Local\Temp\tmp9E24.tmp.bat

Filesize
148B

MD5
9ba17fe0e68297399c31a639bd7cd30f

SHA1
b58c2b9bcddd59506ef898b52609a761ffb9e1da

SHA256
974b768eceb8976dadc056b82d87c2f1287933a8d6fb179e092ff8dee1b6547b

SHA512
a47edd0ab606c30086b5dfff1293ac23a3b9ea53ae7a51c3df46d848b26b715ec23b3aa2c05d3832edea1d932699df33488920606e2659e047d6090b2e9ba6ab

Download Submit
C:\Users\Admin\AppData\Roaming\dwmm.exe

Filesize
47KB

MD5
2731a98129622a67a970a173dda353ef

SHA1
4a705cfafbf7b1b543612203d09b16445a34887f

SHA256
804fb0f9b639fb03310d7cb96b74172d7dca3edcb1fc94b8caaa7cdad6d81e49

SHA512
0b471cac88b99408f9c653bf4feb0947e944c466b55931881790b64fcd6606b42e2960687208f0a7ea3d10b1df3c18cc51fdf8f6f197acdc4df1f293b28cf0fd

Download Submit
memory/1288-14-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/1288-15-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/2980-0-0x00000000745FE000-0x00000000745FF000-memory.dmp

Filesize
4KB

Download
memory/2980-1-0x0000000000AE0000-0x0000000000AF2000-memory.dmp

Filesize
72KB

Download
memory/2980-2-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download
memory/2980-3-0x0000000005470000-0x00000000054D6000-memory.dmp

Filesize
408KB

Download
memory/2980-4-0x0000000005920000-0x00000000059BC000-memory.dmp

Filesize
624KB

Download
memory/2980-9-0x00000000745F0000-0x0000000074DA0000-memory.dmp

Filesize
7.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads