xworm | 2c94d9e87ad5c843048c4a09c3733b1d0326f3b5ce6a40e7b964f45034011dd4

Analysis

max time kernel
149s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
07/06/2024, 01:26

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General

Target
2c94d9e87ad5c843048c4a09c3733b1d0326f3b5ce6a40e7b964f45034011dd4.exe
Size 258KB
Sample240607-btws3agc56
SHA256 2c94d9e87ad5c843048c4a09c3733b1d0326f3b5ce6a40e7b964f45034011dd4
MD5 5b361316509f8f3194eb12dd8b741c6c
SHA1 e98492f076095a6f323e80277ad55bc0639406aa
SHA512 8b22c6147703bc05f3405db877061d64642a3353661c7893482e9c8c897453e1edde3a39abdcda18ed50c296a520efb1430a2a0a7c1d119de363d72bb360abd0
SSDEEP 3072:OYuJYDyLDXFZ2e5B5E5YojWww/wJobAsQcQbEHBAnpK37nXT8u0C/Q7Lue74tyoO:OwDyLDXFZ95L7oLw/wo/8IiaQ7bg8
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution rat trojan

Malware Config

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000b000000023224-5.dat	family_xworm
behavioral2/memory/3168-7-0x0000000000CB0000-0x0000000000CCA000-memory.dmp	family_xworm

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

Detects Windows executables referencing non-Windows User-Agents 2 IoCs

resource	yara_rule
behavioral2/files/0x000b000000023224-5.dat	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA
behavioral2/memory/3168-7-0x0000000000CB0000-0x0000000000CCA000-memory.dmp	INDICATOR_SUSPICIOUS_EXE_NoneWindowsUA

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

execution

PowerShell

T1059.001

pid	Process
4088	powershell.exe
2928	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	svchost‌.exe

Executes dropped EXE 1 IoCs

pid	Process
3168	svchost‌.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
15	raw.githubusercontent.com
16	raw.githubusercontent.com

Drops file in System32 directory 2 IoCs

description	ioc	Process
File created	C:\Windows\System32\svchost‌.exe	2c94d9e87ad5c843048c4a09c3733b1d0326f3b5ce6a40e7b964f45034011dd4.exe
File opened for modification	C:\Windows\System32\svchost‌.exe	2c94d9e87ad5c843048c4a09c3733b1d0326f3b5ce6a40e7b964f45034011dd4.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
4088	powershell.exe
4088	powershell.exe
2928	powershell.exe
2928	powershell.exe
3168	svchost‌.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	3168	svchost‌.exe
Token: SeDebugPrivilege	4088	powershell.exe
Token: SeDebugPrivilege	2928	powershell.exe
Token: SeDebugPrivilege	3168	svchost‌.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3168	svchost‌.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 452 wrote to memory of 4916	452	2c94d9e87ad5c843048c4a09c3733b1d0326f3b5ce6a40e7b964f45034011dd4.exe	91
PID 452 wrote to memory of 4916	452	2c94d9e87ad5c843048c4a09c3733b1d0326f3b5ce6a40e7b964f45034011dd4.exe	91
PID 3168 wrote to memory of 4088	3168	svchost‌.exe	94
PID 3168 wrote to memory of 4088	3168	svchost‌.exe	94
PID 3168 wrote to memory of 2928	3168	svchost‌.exe	96
PID 3168 wrote to memory of 2928	3168	svchost‌.exe	96

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\2c94d9e87ad5c843048c4a09c3733b1d0326f3b5ce6a40e7b964f45034011dd4.exe
"C:\Users\Admin\AppData\Local\Temp\2c94d9e87ad5c843048c4a09c3733b1d0326f3b5ce6a40e7b964f45034011dd4.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:452
- C:\Windows\SYSTEM32\schtasks.exe
  schtasks /run /TN Update
  2⤵
  PID:4916

C:\Windows\System32\svchost‌.exe
C:\Windows\System32\svchost‌.exe
1⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3168
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\System32\svchost‌.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4088
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost‌.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2928

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=3912 --field-trial-handle=2744,i,16362475727591565961,3676688664819797550,262144 --variations-seed-version /prefetch:8
1⤵
PID:2076

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

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 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
MD5 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9
MD5 SHA1 SHA512

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__PSScriptPolicyTest_t1pakprb.dia.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_t1pakprb.dia.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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svchost‌.exe

Path C:\Windows\System32\svchost‌.exe
Size 75KB
SHA256 be9f90f035ff41d59d5579c507eef589daad57aa749128f88df76ca7d858a488
MD5 4215e3706e043c0af260e1a19ee77b08
SHA1 fed96918f57562492f5c6c9a4630ffaaedeb587b
SHA512 38e946bf7692fa9ef6fd078853f2b2e21d3034f43b109c9de86c61020533f8cd557df8721e1b5b6e907762c2e83422a6d98999a109b9876cc6590422d3bb0733
SSDEEP 1536:ePRnv/YBh7p88pf1EtLtBUzO1wXW8+bCTuY9i603uO/SCuQK056:ePVvABIZ/6OGl+bWJAeO/Scz6
MD5 SHA1 SHA512 SSDEEP

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memory/452-0-0x00007FF82DDE3000-0x00007FF82DDE5000-memory.dmp

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memory/452-1-0x0000000000400000-0x0000000000446000-memory.dmp

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memory/3168-7-0x0000000000CB0000-0x0000000000CCA000-memory.dmp

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memory/3168-8-0x00007FF82DDE0000-0x00007FF82E8A1000-memory.dmp

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memory/3168-33-0x00007FF82DDE0000-0x00007FF82E8A1000-memory.dmp

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memory/3168-34-0x00007FF82DDE0000-0x00007FF82E8A1000-memory.dmp

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memory/3168-35-0x00007FF82DDE0000-0x00007FF82E8A1000-memory.dmp

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memory/4088-18-0x00000174F4C80000-0x00000174F4CA2000-memory.dmp

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