asyncrat | e91838e3f9c6aa4e1e043fa30ac176081877347166e52aa9b9cb1e7f25acecbf

Analysis

max time kernel
119s
max time network
123s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
06-10-2023 15:36

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General

Target

Stub.exe
Size

66KB
MD5

93f1ab2325d4e6c3a1c2a0a01c6437bc
SHA1

39c82867d77379637771304db1b93b808efee1b7
SHA256

e91838e3f9c6aa4e1e043fa30ac176081877347166e52aa9b9cb1e7f25acecbf
SHA512

1372a793702f90ad445787041b1bfd43f1a155ded2e9f822124e208c574536f13c6160d127a1242493d1665f296c43782a5a093ec43c33f63f500f4e24fd2e3c
SSDEEP

1536:P2wmkPN1ak1gcKu5UYFpY/jCBebb0UZkg7pVop1rPlTGxx:P21kPN1ak1Ku5UYFp6Mebb0Q9gdCx

Score

10^/10

asyncrat default rat spyware stealer

Malware Config

Extracted

Family

asyncrat

Version

| Edit 3LOSH RAT

Botnet

Default

forlatinamerica.bumbleshrimp.com:2404

Mutex

AsyncMutex_Tre

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 2 IoCs

rat

resource	yara_rule
behavioral1/memory/1364-0-0x0000000000E90000-0x0000000000EA6000-memory.dmp	asyncrat
behavioral1/memory/1364-21-0x0000000000A60000-0x0000000000A84000-memory.dmp	asyncrat

Deletes itself 1 IoCs

pid	Process
2896	cmd.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
2868	timeout.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1364	Stub.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 1364 wrote to memory of 2896	1364	Stub.exe	31
PID 1364 wrote to memory of 2896	1364	Stub.exe	31
PID 1364 wrote to memory of 2896	1364	Stub.exe	31
PID 1364 wrote to memory of 2896	1364	Stub.exe	31
PID 2896 wrote to memory of 2868	2896	cmd.exe	33
PID 2896 wrote to memory of 2868	2896	cmd.exe	33
PID 2896 wrote to memory of 2868	2896	cmd.exe	33
PID 2896 wrote to memory of 2868	2896	cmd.exe	33

C:\Users\Admin\AppData\Local\Temp\Stub.exe
"C:\Users\Admin\AppData\Local\Temp\Stub.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1364
- C:\Windows\SysWOW64\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpBDB.tmp.bat""
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:2896
- - C:\Windows\SysWOW64\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:2868

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab58EB.tmp

Filesize
61KB

MD5
f3441b8572aae8801c04f3060b550443

SHA1
4ef0a35436125d6821831ef36c28ffaf196cda15

SHA256
6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

SHA512
5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarADF.tmp

Filesize
163KB

MD5
9441737383d21192400eca82fda910ec

SHA1
725e0d606a4fc9ba44aa8ffde65bed15e65367e4

SHA256
bc3a6e84e41faeb57e7c21aa3b60c2a64777107009727c5b7c0ed8fe658909e5

SHA512
7608dd653a66cd364392a78d4711b48d1707768d36996e4d38871c6843b5714e1d7da4b4cc6db969e6000cfa182bcb74216ef6823d1063f036fc5c3413fb8dcf

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpBDB.tmp.bat

Filesize
155B

MD5
72e05544b8e63a68af1dcf97162ea89c

SHA1
c81260bcebe7242d2fd97a3f3ce6152f82049bfa

SHA256
20282e25e6d2eac5c49f5fa58f153d6abd2b2a99a7982a3dd777b0272d4e7865

SHA512
e3f13da203838912a9f2c81c1d035bb06baca0f48b5ceb587a3f5fda4e01688b39f587e372fa68e78b10d0414dfba047ac1e32a5617572f6c9d0c051498c69e9

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpBDB.tmp.bat

Filesize
155B

MD5
72e05544b8e63a68af1dcf97162ea89c

SHA1
c81260bcebe7242d2fd97a3f3ce6152f82049bfa

SHA256
20282e25e6d2eac5c49f5fa58f153d6abd2b2a99a7982a3dd777b0272d4e7865

SHA512
e3f13da203838912a9f2c81c1d035bb06baca0f48b5ceb587a3f5fda4e01688b39f587e372fa68e78b10d0414dfba047ac1e32a5617572f6c9d0c051498c69e9

Download Submit
memory/1364-0-0x0000000000E90000-0x0000000000EA6000-memory.dmp

Filesize
88KB

Download
memory/1364-1-0x0000000074E40000-0x000000007552E000-memory.dmp

Filesize
6.9MB

Download
memory/1364-2-0x00000000049E0000-0x0000000004A20000-memory.dmp

Filesize
256KB

Download
memory/1364-19-0x0000000074E40000-0x000000007552E000-memory.dmp

Filesize
6.9MB

Download
memory/1364-20-0x00000000049E0000-0x0000000004A20000-memory.dmp

Filesize
256KB

Download
memory/1364-21-0x0000000000A60000-0x0000000000A84000-memory.dmp

Filesize
144KB

Download
memory/1364-48-0x0000000074E40000-0x000000007552E000-memory.dmp

Filesize
6.9MB

Download