asyncrat | de1b9f6d4bf9909be6073eb4bb16b724a824e3d3d75baef2cfee19f538c79c7e

General

Target

hkcmd.exe
Size

691KB
MD5

dd505f7c59aa2882633c01034428e952
SHA1

12ffe4b71bdda14909f5d88301597f9cdf75ff94
SHA256

de1b9f6d4bf9909be6073eb4bb16b724a824e3d3d75baef2cfee19f538c79c7e
SHA512

3c79eb968ce299b91d1c456f52c3a6cd2bfd75ae6ac8f6e35c56800e3d2e3f2ceec0e95545cb7cb6c6305e2a26ff1b681c65dd3470f1e9d16b8726e9c223ebd0
SSDEEP

12288:SrgDkO3hHlWxMzIHREJVk/bq4izoW/m7GloyLwo6s7pSCpCETtwpkZQ6b98I:SMA4hHlWxMiQW/O4ue7koUos1JpfhkX4

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

191.101.130.205:6606

191.101.130.205:7707

191.101.130.205:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
false
install_folder
%AppData%

aes.plain

Signatures

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

Async RAT payload 1 IoCs

rat

Processes:

resource	yara_rule
behavioral2/memory/3164-146-0x0000000000400000-0x0000000000412000-memory.dmp	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

Processes:

hkcmd.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation hkcmd.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

hkcmd.exe

description pid process target process

PID 1052 set thread context of 3164 1052 hkcmd.exe hkcmd.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

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

3968 schtasks.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.exe

pid process

1640 powershell.exe
1640 powershell.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

powershell.exe

description pid process

Token: SeDebugPrivilege 1640 powershell.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2805025096-2326403612-4231045514-1000\Control Panel\International\Geo\Nation	hkcmd.exe

description	pid	process	target process
PID 1052 set thread context of 3164	1052	hkcmd.exe	hkcmd.exe

pid	process
3968	schtasks.exe

pid	process
1640	powershell.exe
1640	powershell.exe

description	pid	process
Token: SeDebugPrivilege	1640	powershell.exe

Suspicious use of WriteProcessMemory 14 IoCs

Processes:

hkcmd.exe

description	pid	process	target process
PID 1052 wrote to memory of 1640	1052	hkcmd.exe	powershell.exe
PID 1052 wrote to memory of 1640	1052	hkcmd.exe	powershell.exe
PID 1052 wrote to memory of 1640	1052	hkcmd.exe	powershell.exe
PID 1052 wrote to memory of 3968	1052	hkcmd.exe	schtasks.exe
PID 1052 wrote to memory of 3968	1052	hkcmd.exe	schtasks.exe
PID 1052 wrote to memory of 3968	1052	hkcmd.exe	schtasks.exe
PID 1052 wrote to memory of 3164	1052	hkcmd.exe	hkcmd.exe
PID 1052 wrote to memory of 3164	1052	hkcmd.exe	hkcmd.exe
PID 1052 wrote to memory of 3164	1052	hkcmd.exe	hkcmd.exe
PID 1052 wrote to memory of 3164	1052	hkcmd.exe	hkcmd.exe
PID 1052 wrote to memory of 3164	1052	hkcmd.exe	hkcmd.exe
PID 1052 wrote to memory of 3164	1052	hkcmd.exe	hkcmd.exe
PID 1052 wrote to memory of 3164	1052	hkcmd.exe	hkcmd.exe
PID 1052 wrote to memory of 3164	1052	hkcmd.exe	hkcmd.exe

C:\Users\Admin\AppData\Local\Temp\hkcmd.exe
"C:\Users\Admin\AppData\Local\Temp\hkcmd.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1052

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\RjBtcy.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1640

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\RjBtcy" /XML "C:\Users\Admin\AppData\Local\Temp\tmp540.tmp"
2⤵
- Creates scheduled task(s)
PID:3968

C:\Users\Admin\AppData\Local\Temp\hkcmd.exe
"C:\Users\Admin\AppData\Local\Temp\hkcmd.exe"
2⤵
PID:3164

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\hkcmd.exe.log
Filesize
1KB

MD5
33d62ef2c354f839a8b2b987e6ee41e7

SHA1
d76f64ac411a61f3f232f7f9f7b179bd34042226

SHA256
f6a84062cb11ccf802324692c2c4c48543377cf717d98efd5de695ed6d0a97d9

SHA512
d68a426b2f4646bb45e2267d60680166a8effb9a461e5a07756ba13a3bdf36b27e6e9777d945d03a62362e6976e92214c53ffc7c4f03ec28d3fcfc9a442c5e3c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kjczlq0g.hlp.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp540.tmp
Filesize
1KB

MD5
dcafef379a5683d29779e9f7caa8bf5a

SHA1
712b4b099f3c486af559bdc192356b608e544168

SHA256
cc8ee15e7321cca25b9811423ab6fdd02c39e074708f435d55ee5747c9d2136b

SHA512
72cac29446695cc17a52c49702bd6c47c41970a5783a4ff5215cd7daa07d0d39ddd327b8a0511b55e62076140c1aa64bc2de9b2669d3bd9b399b20fe21030c4c

Download Submit
memory/1052-134-0x00000000053E0000-0x0000000005984000-memory.dmp

Filesize
5.6MB

Download
memory/1052-135-0x0000000004E30000-0x0000000004EC2000-memory.dmp

Filesize
584KB

Download
memory/1052-136-0x0000000004DC0000-0x0000000004DCA000-memory.dmp

Filesize
40KB

Download
memory/1052-137-0x0000000005030000-0x0000000005040000-memory.dmp

Filesize
64KB

Download
memory/1052-138-0x0000000005030000-0x0000000005040000-memory.dmp

Filesize
64KB

Download
memory/1052-139-0x0000000007D70000-0x0000000007E0C000-memory.dmp

Filesize
624KB

Download
memory/1052-133-0x0000000000360000-0x0000000000412000-memory.dmp

Filesize
712KB

Download
memory/1640-162-0x0000000002940000-0x0000000002950000-memory.dmp

Filesize
64KB

Download
memory/1640-176-0x00000000067B0000-0x00000000067CE000-memory.dmp

Filesize
120KB

Download
memory/1640-150-0x0000000005120000-0x0000000005142000-memory.dmp

Filesize
136KB

Download
memory/1640-151-0x00000000052D0000-0x0000000005336000-memory.dmp

Filesize
408KB

Download
memory/1640-186-0x0000000007830000-0x0000000007838000-memory.dmp

Filesize
32KB

Download
memory/1640-157-0x0000000005BE0000-0x0000000005C46000-memory.dmp

Filesize
408KB

Download
memory/1640-145-0x00000000028E0000-0x0000000002916000-memory.dmp

Filesize
216KB

Download
memory/1640-163-0x0000000002940000-0x0000000002950000-memory.dmp

Filesize
64KB

Download
memory/1640-164-0x0000000006200000-0x000000000621E000-memory.dmp

Filesize
120KB

Download
memory/1640-165-0x00000000067D0000-0x0000000006802000-memory.dmp

Filesize
200KB

Download
memory/1640-166-0x0000000071630000-0x000000007167C000-memory.dmp

Filesize
304KB

Download
memory/1640-149-0x0000000005440000-0x0000000005A68000-memory.dmp

Filesize
6.2MB

Download
memory/1640-177-0x0000000002940000-0x0000000002950000-memory.dmp

Filesize
64KB

Download
memory/1640-178-0x000000007F3C0000-0x000000007F3D0000-memory.dmp

Filesize
64KB

Download
memory/1640-179-0x0000000007B50000-0x00000000081CA000-memory.dmp

Filesize
6.5MB

Download
memory/1640-180-0x0000000007510000-0x000000000752A000-memory.dmp

Filesize
104KB

Download
memory/1640-181-0x0000000007580000-0x000000000758A000-memory.dmp

Filesize
40KB

Download
memory/1640-182-0x0000000007790000-0x0000000007826000-memory.dmp

Filesize
600KB

Download
memory/1640-185-0x0000000007850000-0x000000000786A000-memory.dmp

Filesize
104KB

Download
memory/1640-184-0x0000000007740000-0x000000000774E000-memory.dmp

Filesize
56KB

Download
memory/3164-183-0x0000000004F70000-0x0000000004F80000-memory.dmp

Filesize
64KB

Download
memory/3164-146-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3164-189-0x0000000004F70000-0x0000000004F80000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads