asyncrat | fb037edda6db14f4cc45540ee0719c8ca02cbc7636f48c14b6dca3bd187f3e44

General

Target

06211199.exe
Size

787KB
MD5

0e6861c721b9342f69eba894703f6484
SHA1

6c9b0712a4c249805f2f2f1760cd72cf917aa7c6
SHA256

fb037edda6db14f4cc45540ee0719c8ca02cbc7636f48c14b6dca3bd187f3e44
SHA512

6beb131306e2ae3b91d62f3630271b6755957f2046870ae4b62313851e98b4a2837053ea86d06da3f91d6b9b8ab81eb7e8bf7ccc26b1cb3cbe6cdf9e7db0dbe8
SSDEEP

6144:de/RS6Ugha13DnnTawr+BpIW85aDIamyJ95xuuEHQiljH6gnGJZ1ZnImK:deZB1hXwr+h85pMbxuuEHNe6IZBK

Score

10^/10

asyncrat default rat

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

fresh03.ddns.net:45265

fresh03.ddns.net:34110

fresh03.ddns.net:2245

fresh01.ddns.net:45265

fresh01.ddns.net:34110

fresh01.ddns.net:2245

Mutex

AsyncMutex_6SI8OkPnk

Attributes

delay
3
install
true
install_file
logs.exe
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/4444-144-0x0000000000400000-0x0000000000412000-memory.dmp	asyncrat

Checks computer location settings 2 TTPs 3 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

06211199.exe06211199.exelogs.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	06211199.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	06211199.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1529757233-3489015626-3409890339-1000\Control Panel\International\Geo\Nation	logs.exe

Executes dropped EXE 2 IoCs

Processes:

logs.exelogs.exe

pid process

4592 logs.exe
2276 logs.exe

pid	process
4592	logs.exe
2276	logs.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

06211199.exelogs.exe

description	pid	process	target process
PID 4156 set thread context of 4444	4156	06211199.exe	06211199.exe
PID 4592 set thread context of 2276	4592	logs.exe	logs.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 3 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task
T1053

Processes:

schtasks.exeschtasks.exeschtasks.exe

pid process

1676 schtasks.exe
388 schtasks.exe
4632 schtasks.exe
Delays execution with timeout.exe 1 IoCs
evasion

Processes:

timeout.exe

pid process

3788 timeout.exe

pid	process
1676	schtasks.exe
388	schtasks.exe
4632	schtasks.exe

pid	process
3788	timeout.exe

Suspicious behavior: EnumeratesProcesses 23 IoCs

Processes:

06211199.exe06211199.exelogs.exe

pid	process
4156	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4444	06211199.exe
4592	logs.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

06211199.exe06211199.exelogs.exelogs.exe

description	pid	process
Token: SeDebugPrivilege	4156	06211199.exe
Token: SeDebugPrivilege	4444	06211199.exe
Token: SeDebugPrivilege	4592	logs.exe
Token: SeDebugPrivilege	2276	logs.exe

Suspicious use of WriteProcessMemory 37 IoCs

Processes:

06211199.exe06211199.execmd.execmd.exelogs.exe

description	pid	process	target process
PID 4156 wrote to memory of 1676	4156	06211199.exe	schtasks.exe
PID 4156 wrote to memory of 1676	4156	06211199.exe	schtasks.exe
PID 4156 wrote to memory of 1676	4156	06211199.exe	schtasks.exe
PID 4156 wrote to memory of 4444	4156	06211199.exe	06211199.exe
PID 4156 wrote to memory of 4444	4156	06211199.exe	06211199.exe
PID 4156 wrote to memory of 4444	4156	06211199.exe	06211199.exe
PID 4156 wrote to memory of 4444	4156	06211199.exe	06211199.exe
PID 4156 wrote to memory of 4444	4156	06211199.exe	06211199.exe
PID 4156 wrote to memory of 4444	4156	06211199.exe	06211199.exe
PID 4156 wrote to memory of 4444	4156	06211199.exe	06211199.exe
PID 4156 wrote to memory of 4444	4156	06211199.exe	06211199.exe
PID 4444 wrote to memory of 1608	4444	06211199.exe	cmd.exe
PID 4444 wrote to memory of 1608	4444	06211199.exe	cmd.exe
PID 4444 wrote to memory of 1608	4444	06211199.exe	cmd.exe
PID 4444 wrote to memory of 3552	4444	06211199.exe	cmd.exe
PID 4444 wrote to memory of 3552	4444	06211199.exe	cmd.exe
PID 4444 wrote to memory of 3552	4444	06211199.exe	cmd.exe
PID 1608 wrote to memory of 388	1608	cmd.exe	schtasks.exe
PID 1608 wrote to memory of 388	1608	cmd.exe	schtasks.exe
PID 1608 wrote to memory of 388	1608	cmd.exe	schtasks.exe
PID 3552 wrote to memory of 3788	3552	cmd.exe	timeout.exe
PID 3552 wrote to memory of 3788	3552	cmd.exe	timeout.exe
PID 3552 wrote to memory of 3788	3552	cmd.exe	timeout.exe
PID 3552 wrote to memory of 4592	3552	cmd.exe	logs.exe
PID 3552 wrote to memory of 4592	3552	cmd.exe	logs.exe
PID 3552 wrote to memory of 4592	3552	cmd.exe	logs.exe
PID 4592 wrote to memory of 4632	4592	logs.exe	schtasks.exe
PID 4592 wrote to memory of 4632	4592	logs.exe	schtasks.exe
PID 4592 wrote to memory of 4632	4592	logs.exe	schtasks.exe
PID 4592 wrote to memory of 2276	4592	logs.exe	logs.exe
PID 4592 wrote to memory of 2276	4592	logs.exe	logs.exe
PID 4592 wrote to memory of 2276	4592	logs.exe	logs.exe
PID 4592 wrote to memory of 2276	4592	logs.exe	logs.exe
PID 4592 wrote to memory of 2276	4592	logs.exe	logs.exe
PID 4592 wrote to memory of 2276	4592	logs.exe	logs.exe
PID 4592 wrote to memory of 2276	4592	logs.exe	logs.exe
PID 4592 wrote to memory of 2276	4592	logs.exe	logs.exe

C:\Users\Admin\AppData\Local\Temp\06211199.exe
"C:\Users\Admin\AppData\Local\Temp\06211199.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4156

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ziFpddctAZBdQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3671.tmp"
2⤵
- Creates scheduled task(s)
PID:1676

C:\Users\Admin\AppData\Local\Temp\06211199.exe
"{path}"
2⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4444

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "logs" /tr '"C:\Users\Admin\AppData\Roaming\logs.exe"' & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:1608

C:\Windows\SysWOW64\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /tn "logs" /tr '"C:\Users\Admin\AppData\Roaming\logs.exe"'
4⤵
- Creates scheduled task(s)
PID:388

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4F49.tmp.bat""
3⤵
- Suspicious use of WriteProcessMemory
PID:3552

C:\Windows\SysWOW64\timeout.exe
timeout 3
4⤵
- Delays execution with timeout.exe
PID:3788

C:\Users\Admin\AppData\Roaming\logs.exe
"C:\Users\Admin\AppData\Roaming\logs.exe"
4⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4592

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ziFpddctAZBdQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF647.tmp"
5⤵
- Creates scheduled task(s)
PID:4632

C:\Users\Admin\AppData\Roaming\logs.exe
"{path}"
5⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2276

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\06211199.exe.log
Filesize
1KB

MD5
17573558c4e714f606f997e5157afaac

SHA1
13e16e9415ceef429aaf124139671ebeca09ed23

SHA256
c18db6aecad2436da4a63ff26af4e3a337cca48f01c21b8db494fe5ccc60e553

SHA512
f4edf13f05a0d142e4dd42802098c8c44988ee8869621a62c2b565a77c9a95857f636583ff8d6d9baa366603d98b9bfbf1fc75bc6f9f8f83c80cb1215b2941cc

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

MD5
17573558c4e714f606f997e5157afaac

SHA1
13e16e9415ceef429aaf124139671ebeca09ed23

SHA256
c18db6aecad2436da4a63ff26af4e3a337cca48f01c21b8db494fe5ccc60e553

SHA512
f4edf13f05a0d142e4dd42802098c8c44988ee8869621a62c2b565a77c9a95857f636583ff8d6d9baa366603d98b9bfbf1fc75bc6f9f8f83c80cb1215b2941cc

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp3671.tmp
Filesize
1KB

MD5
7c27a5d2da94a8aed05fde63c0817d8e

SHA1
28772197bdd1517aaaed21f7e62e9d0202d8bd77

SHA256
a8960c3c70fd294b56e5e9cd0f0b5953337dcb2dd4c78e8b4b44c3e1cbc37945

SHA512
e081335ce8fdcf6455dc07f881785ad438a1ddac8c5a7d97d2779f45f13859d739cf9e2e37629e833bf72b4ac18c20d23aeb8dab5477a3e69e11213f1790e291

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp4F49.tmp.bat
Filesize
148B

MD5
9940e204e63fec0f7f71b18459e9b3f6

SHA1
2d08f386ff9bef6b0585c057873360ff84c90ef9

SHA256
ee86a91eb6f00719750712197e6232a75515184ff2fe3d1485c400ec47e6c875

SHA512
65cac04a2f25782a95d8ac4e30a281f31b96c92255d7311664aeaaab3e72dfa636455a4a44eddf193bd4b6e5bf6da40077f5b787086084040c26afddae924330

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpF647.tmp
Filesize
1KB

MD5
7c27a5d2da94a8aed05fde63c0817d8e

SHA1
28772197bdd1517aaaed21f7e62e9d0202d8bd77

SHA256
a8960c3c70fd294b56e5e9cd0f0b5953337dcb2dd4c78e8b4b44c3e1cbc37945

SHA512
e081335ce8fdcf6455dc07f881785ad438a1ddac8c5a7d97d2779f45f13859d739cf9e2e37629e833bf72b4ac18c20d23aeb8dab5477a3e69e11213f1790e291

Download Submit
C:\Users\Admin\AppData\Roaming\logs.exe
Filesize
787KB

MD5
0e6861c721b9342f69eba894703f6484

SHA1
6c9b0712a4c249805f2f2f1760cd72cf917aa7c6

SHA256
fb037edda6db14f4cc45540ee0719c8ca02cbc7636f48c14b6dca3bd187f3e44

SHA512
6beb131306e2ae3b91d62f3630271b6755957f2046870ae4b62313851e98b4a2837053ea86d06da3f91d6b9b8ab81eb7e8bf7ccc26b1cb3cbe6cdf9e7db0dbe8

Download Submit
C:\Users\Admin\AppData\Roaming\logs.exe
Filesize
787KB

MD5
0e6861c721b9342f69eba894703f6484

SHA1
6c9b0712a4c249805f2f2f1760cd72cf917aa7c6

SHA256
fb037edda6db14f4cc45540ee0719c8ca02cbc7636f48c14b6dca3bd187f3e44

SHA512
6beb131306e2ae3b91d62f3630271b6755957f2046870ae4b62313851e98b4a2837053ea86d06da3f91d6b9b8ab81eb7e8bf7ccc26b1cb3cbe6cdf9e7db0dbe8

Download Submit
C:\Users\Admin\AppData\Roaming\logs.exe
Filesize
787KB

MD5
0e6861c721b9342f69eba894703f6484

SHA1
6c9b0712a4c249805f2f2f1760cd72cf917aa7c6

SHA256
fb037edda6db14f4cc45540ee0719c8ca02cbc7636f48c14b6dca3bd187f3e44

SHA512
6beb131306e2ae3b91d62f3630271b6755957f2046870ae4b62313851e98b4a2837053ea86d06da3f91d6b9b8ab81eb7e8bf7ccc26b1cb3cbe6cdf9e7db0dbe8

Download Submit
memory/2276-164-0x0000000004D80000-0x0000000004D90000-memory.dmp

Filesize
64KB

Download
memory/2276-163-0x0000000004D80000-0x0000000004D90000-memory.dmp

Filesize
64KB

Download
memory/4156-138-0x0000000005050000-0x00000000050A6000-memory.dmp

Filesize
344KB

Download
memory/4156-140-0x0000000004DF0000-0x0000000004E00000-memory.dmp

Filesize
64KB

Download
memory/4156-139-0x0000000004DF0000-0x0000000004E00000-memory.dmp

Filesize
64KB

Download
memory/4156-133-0x00000000002E0000-0x00000000003AC000-memory.dmp

Filesize
816KB

Download
memory/4156-137-0x0000000004E10000-0x0000000004E1A000-memory.dmp

Filesize
40KB

Download
memory/4156-136-0x0000000004E60000-0x0000000004EF2000-memory.dmp

Filesize
584KB

Download
memory/4156-135-0x0000000005370000-0x0000000005914000-memory.dmp

Filesize
5.6MB

Download
memory/4156-134-0x0000000004D20000-0x0000000004DBC000-memory.dmp

Filesize
624KB

Download
memory/4444-147-0x0000000005020000-0x0000000005030000-memory.dmp

Filesize
64KB

Download
memory/4444-144-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/4592-155-0x0000000005590000-0x00000000055A0000-memory.dmp

Filesize
64KB

Download
memory/4592-156-0x0000000005590000-0x00000000055A0000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

Replay Monitor

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Downloads