xworm | db17812e10401ae3cdc44e07272758c155e215ccc2d4859833d7a26e38706d92

Analysis

max time kernel
149s
max time network
155s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26/05/2024, 15:38

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General

Target
siski.exe
Size 88KB
Sample240526-s3e1cabd4v
SHA256 db17812e10401ae3cdc44e07272758c155e215ccc2d4859833d7a26e38706d92
MD5 a39a9dbad030467f590832a6ab2ff349
SHA1 23b9baed2339451a3dc0d710024e4f010fc89be8
SHA512 1ea795f981ecf0abb66c2fc2e1704e5292e319d8ff8d24a7e52b05b03125dc24d46f3b80a5f89acedd7361f0adfc7150a3707f9d41a2b4202e7cd014d359232c
SSDEEP 1536:f62bFTb1Y/aBjS2jklqQZyoJPbUu6Ejbg/YVk36H2VLOO/V2G/cR:t5TyCZjks0ymbttnrVkxLOO2McR
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

character-estimate.gl.at.ply.gg:61192

Attributes

Install_directory
%ProgramData%
install_file
Chrome.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral3/memory/636-1-0x0000000000570000-0x000000000058C000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1364	powershell.exe
2764	powershell.exe
1036	powershell.exe
4232	powershell.exe

Checks computer location settings 2 TTPs 1 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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	siski.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Chrome.lnk	siski.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Chrome.lnk	siski.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Chrome = "C:\\ProgramData\\Chrome.exe"	siski.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
7	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4232	powershell.exe
4232	powershell.exe
1364	powershell.exe
1364	powershell.exe
2764	powershell.exe
2764	powershell.exe
1036	powershell.exe
1036	powershell.exe
636	siski.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	636	siski.exe
Token: SeDebugPrivilege	4232	powershell.exe
Token: SeDebugPrivilege	1364	powershell.exe
Token: SeDebugPrivilege	2764	powershell.exe
Token: SeDebugPrivilege	1036	powershell.exe
Token: SeDebugPrivilege	636	siski.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
636	siski.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 636 wrote to memory of 4232	636	siski.exe	92
PID 636 wrote to memory of 4232	636	siski.exe	92
PID 636 wrote to memory of 1364	636	siski.exe	94
PID 636 wrote to memory of 1364	636	siski.exe	94
PID 636 wrote to memory of 2764	636	siski.exe	96
PID 636 wrote to memory of 2764	636	siski.exe	96
PID 636 wrote to memory of 1036	636	siski.exe	98
PID 636 wrote to memory of 1036	636	siski.exe	98

C:\Users\Admin\AppData\Local\Temp\siski.exe
"C:\Users\Admin\AppData\Local\Temp\siski.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:636
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\siski.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4232
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'siski.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1364
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\Chrome.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2764
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Chrome.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1036

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4388 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8
1⤵
PID:1680

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d
MD5 6d3e9c29fe44e90aae6ed30ccf799ca8
SHA1 c7974ef72264bbdf13a2793ccf1aed11bc565dce
SHA512 60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 718dc2f5f4a6dbb7fab7f3db05bd7f602fb16526caae7084ab46c3ab4e7bad35
MD5 65a68df1062af34622552c4f644a5708
SHA1 6f6ecf7b4b635abb0b132d95dac2759dc14b50af
SHA512 4e460eb566032942547b58411222dd26ae300a95f83cf5ae6df58ebd28594341123611b348bd4031a33bc7f38307d5cb8fb677bba8c896919e3eee677a104d4d
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 692ec20c7039170fb199510f0436181fd155e6b4516d4d1c9e1675adf99aaa7f
MD5 ef72c47dbfaae0b9b0d09f22ad4afe20
SHA1 5357f66ba69b89440b99d4273b74221670129338
SHA512 7514b6bc8dc39fa618223300be27cd535dc35b18c66b4a089e2302e72b3e0cac06d88a989fa1296feb386b3cbe2084019df6430c7f895071b76e04ce559a30b4
MD5 SHA1 SHA512

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__PSScriptPolicyTest_phtjbhiw.0py.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_phtjbhiw.0py.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/636-1-0x0000000000570000-0x000000000058C000-memory.dmp

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memory/636-2-0x00007FFAE92C0000-0x00007FFAE9D81000-memory.dmp

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memory/636-0-0x00007FFAE92C3000-0x00007FFAE92C5000-memory.dmp

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memory/636-60-0x00007FFAE92C0000-0x00007FFAE9D81000-memory.dmp

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memory/636-59-0x00007FFAE92C3000-0x00007FFAE92C5000-memory.dmp

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memory/4232-8-0x00000153D0F60000-0x00000153D0F82000-memory.dmp

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memory/4232-20-0x00007FFAE92C0000-0x00007FFAE9D81000-memory.dmp

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memory/4232-17-0x00007FFAE92C0000-0x00007FFAE9D81000-memory.dmp

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memory/4232-16-0x00007FFAE92C0000-0x00007FFAE9D81000-memory.dmp

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memory/4232-15-0x00007FFAE92C0000-0x00007FFAE9D81000-memory.dmp

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memory/4232-14-0x00007FFAE92C0000-0x00007FFAE9D81000-memory.dmp

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memory/4232-9-0x00007FFAE92C0000-0x00007FFAE9D81000-memory.dmp

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