asyncrat | 8f03cdbacac14321711d751ac862231ccdb13522e07ff0f3a42e128ceba61f13

General

Target

trwesf.exe
Size

34KB
MD5

75d3088b3da605e4b01ef86a8e8376dc
SHA1

f487c38fda56c98488105ba03c88229c467dad43
SHA256

8f03cdbacac14321711d751ac862231ccdb13522e07ff0f3a42e128ceba61f13
SHA512

397816db0b9331b3bc660f29e80ec8549e51078e4f34ef4e452a8ef2376b99ff14eaad6331b026f23c6489b18511ed6c937570740e85dffbb8e5d178164d947e
SSDEEP

768:wbqI7VVQEi5oaWPFaq8EGrUDjKZxxvjYrKa/O56Ue4uaPHx:w28VWH5ojsKGgDjKZxxiKa25npbPHx

Score

10^/10

asyncrat stormkitty venomrat discovery rat stealer

Malware Config

Signatures

AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
rat asyncrat
Asyncrat family
asyncrat
StormKitty
StormKitty is an open source info stealer written in C#.
stealer stormkitty

StormKitty payload 5 IoCs

resource	yara_rule
behavioral1/memory/2224-19-0x0000000000400000-0x0000000000704000-memory.dmp	family_stormkitty
behavioral1/memory/2224-20-0x0000000000400000-0x0000000000704000-memory.dmp	family_stormkitty
behavioral1/memory/2224-25-0x0000000000400000-0x0000000000704000-memory.dmp	family_stormkitty
behavioral1/memory/2224-22-0x0000000000400000-0x0000000000704000-memory.dmp	family_stormkitty
behavioral1/memory/2224-27-0x0000000000400000-0x0000000000704000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty

VenomRAT 5 IoCs

Detects VenomRAT.

rat

resource	yara_rule
behavioral1/memory/2224-19-0x0000000000400000-0x0000000000704000-memory.dmp	VenomRAT
behavioral1/memory/2224-20-0x0000000000400000-0x0000000000704000-memory.dmp	VenomRAT
behavioral1/memory/2224-25-0x0000000000400000-0x0000000000704000-memory.dmp	VenomRAT
behavioral1/memory/2224-22-0x0000000000400000-0x0000000000704000-memory.dmp	VenomRAT
behavioral1/memory/2224-27-0x0000000000400000-0x0000000000704000-memory.dmp	VenomRAT

Venomrat family
venomrat
Downloads MZ/PE file
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2168 set thread context of 2224	2168	trwesf.exe	33

System Location Discovery: System Language Discovery 1 TTPs 4 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	cvtres.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	trwesf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	csc.exe

Suspicious behavior: EnumeratesProcesses 33 IoCs

pid	Process
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe
2224	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2168	trwesf.exe
Token: SeDebugPrivilege	2224	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2224	RegAsm.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 2168 wrote to memory of 2740	2168	trwesf.exe	30
PID 2168 wrote to memory of 2740	2168	trwesf.exe	30
PID 2168 wrote to memory of 2740	2168	trwesf.exe	30
PID 2168 wrote to memory of 2740	2168	trwesf.exe	30
PID 2740 wrote to memory of 2660	2740	csc.exe	32
PID 2740 wrote to memory of 2660	2740	csc.exe	32
PID 2740 wrote to memory of 2660	2740	csc.exe	32
PID 2740 wrote to memory of 2660	2740	csc.exe	32
PID 2168 wrote to memory of 2224	2168	trwesf.exe	33
PID 2168 wrote to memory of 2224	2168	trwesf.exe	33
PID 2168 wrote to memory of 2224	2168	trwesf.exe	33
PID 2168 wrote to memory of 2224	2168	trwesf.exe	33
PID 2168 wrote to memory of 2224	2168	trwesf.exe	33
PID 2168 wrote to memory of 2224	2168	trwesf.exe	33
PID 2168 wrote to memory of 2224	2168	trwesf.exe	33
PID 2168 wrote to memory of 2224	2168	trwesf.exe	33
PID 2168 wrote to memory of 2224	2168	trwesf.exe	33
PID 2168 wrote to memory of 2224	2168	trwesf.exe	33
PID 2168 wrote to memory of 2224	2168	trwesf.exe	33
PID 2168 wrote to memory of 2224	2168	trwesf.exe	33

C:\Users\Admin\AppData\Local\Temp\trwesf.exe
"C:\Users\Admin\AppData\Local\Temp\trwesf.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\js0jbj5q\js0jbj5q.cmdline"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2740
- - C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
    C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESEEA3.tmp" "c:\Users\Admin\AppData\Local\Temp\js0jbj5q\CSC1BB36BF5E44045299758B7D57195F51E.TMP"
    3⤵
    - System Location Discovery: System Language Discovery
    PID:2660
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2224

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\Cab8C9.tmp

Filesize
70KB

MD5
49aebf8cbd62d92ac215b2923fb1b9f5

SHA1
1723be06719828dda65ad804298d0431f6aff976

SHA256
b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

SHA512
bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

Download Submit
C:\Users\Admin\AppData\Local\Temp\RESEEA3.tmp

Filesize
1KB

MD5
14183c70ae1b18afe2c443ab00190066

SHA1
97676a42527385e7ba2da4ee4a9eb3fc30576554

SHA256
70492f66b4d2905b1c0df589a5f4b4cc4f9fcad8defa1b8037085eabd0555d01

SHA512
22e28a96b3a0e31ded2ecbea2b1c53bddde3802b11428d9baba1375cb63d11fa9a01ba52aae9a65bdd4699afa6bb3ef12f70cf190f7c417c672cae1444807058

Download Submit
C:\Users\Admin\AppData\Local\Temp\Tar1A88.tmp

Filesize
181KB

MD5
4ea6026cf93ec6338144661bf1202cd1

SHA1
a1dec9044f750ad887935a01430bf49322fbdcb7

SHA256
8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

SHA512
6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

Download Submit
C:\Users\Admin\AppData\Local\Temp\js0jbj5q\js0jbj5q.dll

Filesize
9KB

MD5
f0c017ad7d1aedfca015526466638a6f

SHA1
5a4e1322e11beab74461faaab391de60aeb5629b

SHA256
9d04c5f7ad15fa5eebceaebf19db3bfe51922dbd74bca26b460a7e2506f09cf8

SHA512
b1adea6d7fe13ef52540392b8eeab9460718bea4dc935032ffc0e9d0a5a02c2b8c5a54a541dfe8233af3e4de52e9d74438ff6058890acc4354cae21ba252d3c0

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\js0jbj5q\CSC1BB36BF5E44045299758B7D57195F51E.TMP

Filesize
652B

MD5
1ba90dc787c3a0f1f9bd24dc513c99b8

SHA1
1b3099fff714a2fc2010e0849bba9a590e264e02

SHA256
88e0dec196297832c0f3de5f28af760aa951ea38576872c83c7503292e2cb301

SHA512
11cb0fbc88d37a66880adf1a993a27f0ff2f2d6b7eff3d7031d3fff607d9274083c5dcf2d96fdd54e4c8f19733c7f5fb5616129b276a635a482c0e3bceb5f723

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\js0jbj5q\js0jbj5q.0.cs

Filesize
10KB

MD5
f8284f43aa8e48242dff1cad24736fcd

SHA1
ba8c41bc6175185a0bdbf8778df92e66a7029c65

SHA256
e12c8c4a47176808b9117ec2aa27c2afaf4bdddcd2f60eea48696aa7daa747f6

SHA512
4e84606d99d853f915662ffc996ac426fe7f02e90009f58c25a07c86bc84120c7d26dd2bfee3efc78099af7e729a5a6d27c611147eb64f908a9b58caa0a6b69c

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\js0jbj5q\js0jbj5q.cmdline

Filesize
204B

MD5
7edcf1be5d3c5368bd6acbae4aa3cec1

SHA1
7c44218ed2506d533bde3aaf609ca7449892c4e5

SHA256
ff40485ddbf9b4aeea6132d69ad28db7358ae8d02299a6840c370c5696beb130

SHA512
3dc3e4ecc85197c505f3073c31df55bc2adc6942f7d1147e11f965f81cd167a41b8569573ad97ce4af66c84d7001ec6ea0cb97fd61656a2d42acd3483904d2a6

Download Submit
memory/2168-23-0x00000000744E0000-0x0000000074BCE000-memory.dmp

Filesize
6.9MB

Download
memory/2168-15-0x0000000000290000-0x0000000000298000-memory.dmp

Filesize
32KB

Download
memory/2168-0-0x00000000744EE000-0x00000000744EF000-memory.dmp

Filesize
4KB

Download
memory/2168-6-0x00000000744E0000-0x0000000074BCE000-memory.dmp

Filesize
6.9MB

Download
memory/2168-1-0x0000000001340000-0x000000000134E000-memory.dmp

Filesize
56KB

Download
memory/2224-17-0x0000000000400000-0x0000000000704000-memory.dmp

Filesize
3.0MB

Download
memory/2224-21-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2224-19-0x0000000000400000-0x0000000000704000-memory.dmp

Filesize
3.0MB

Download
memory/2224-18-0x0000000000400000-0x0000000000704000-memory.dmp

Filesize
3.0MB

Download
memory/2224-20-0x0000000000400000-0x0000000000704000-memory.dmp

Filesize
3.0MB

Download
memory/2224-25-0x0000000000400000-0x0000000000704000-memory.dmp

Filesize
3.0MB

Download
memory/2224-22-0x0000000000400000-0x0000000000704000-memory.dmp

Filesize
3.0MB

Download
memory/2224-27-0x0000000000400000-0x0000000000704000-memory.dmp

Filesize
3.0MB

Download

Analysis

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