xworm | eed43c12866f5d2d70382ccd10a07670e4b935885a3dbf375da38b8924339b0d

Analysis

max time kernel
93s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
05/06/2024, 17:30

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General

Target
Solara v2.exe
Size 230KB
Sample240605-v28mdadh65
SHA256 eed43c12866f5d2d70382ccd10a07670e4b935885a3dbf375da38b8924339b0d
MD5 2c97e31fdc209f1ae51f1dc93a7993a7
SHA1 fc6214f6e91809aaf29fa39cc6a0ebd09fa35909
SHA512 17d0b2244ceeb9d0d7cc75529a071bf4208b8b8b7d77d69f4639e5f2c2c8e66f81fc5a49689741caae9967a23877e0841f4aeb139471bd46f5ba95cdb9b6a415
SSDEEP 3072:H/FnmqDWX+bSdKsmCOEtrH8SKfbzxcwg7es6/Vsb8VKTu549oJMfF/H9N3Ky9Nz8:nDWub5kUhcX7elbKTua9bfF/H9d9n
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

takes-stewart.gl.at.ply.gg:61176

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3400-0-0x00000000001B0000-0x00000000001EE000-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
616	powershell.exe
4908	powershell.exe
2624	powershell.exe
220	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-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	Solara v2.exe

Executes dropped EXE 1 IoCs

pid	Process
2604	utrtdl.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-1-5-21-3571316656-3665257725-2415531812-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	Solara v2.exe

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

System Information Discovery
T1082

Modifies registry class 10 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\.enigma\ = "EnigmaProjectFile"	utrtdl.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\EnigmaProjectFile\ = "The Enigma Protector project file"	utrtdl.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\EnigmaProjectFile\Shell\Open	utrtdl.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\EnigmaProjectFile\DefaultIcon	utrtdl.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\EnigmaProjectFile\DefaultIcon\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\utrtdl.exe,0"	utrtdl.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\.enigma	utrtdl.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\EnigmaProjectFile	utrtdl.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\EnigmaProjectFile\Shell	utrtdl.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\EnigmaProjectFile\Shell\Open\command	utrtdl.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\EnigmaProjectFile\Shell\Open\command\ = "\"C:\\Users\\Admin\\AppData\\Local\\Temp\\utrtdl.exe\" \"%1\""	utrtdl.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
616	powershell.exe
616	powershell.exe
4908	powershell.exe
4908	powershell.exe
2624	powershell.exe
2624	powershell.exe
220	powershell.exe
220	powershell.exe
3400	Solara v2.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3400	Solara v2.exe
Token: SeDebugPrivilege	616	powershell.exe
Token: SeDebugPrivilege	4908	powershell.exe
Token: SeDebugPrivilege	2624	powershell.exe
Token: SeDebugPrivilege	220	powershell.exe
Token: SeDebugPrivilege	3400	Solara v2.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3400	Solara v2.exe
2604	utrtdl.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3400 wrote to memory of 616	3400	Solara v2.exe	87
PID 3400 wrote to memory of 616	3400	Solara v2.exe	87
PID 3400 wrote to memory of 4908	3400	Solara v2.exe	91
PID 3400 wrote to memory of 4908	3400	Solara v2.exe	91
PID 3400 wrote to memory of 2624	3400	Solara v2.exe	94
PID 3400 wrote to memory of 2624	3400	Solara v2.exe	94
PID 3400 wrote to memory of 220	3400	Solara v2.exe	96
PID 3400 wrote to memory of 220	3400	Solara v2.exe	96
PID 3400 wrote to memory of 2604	3400	Solara v2.exe	101
PID 3400 wrote to memory of 2604	3400	Solara v2.exe	101
PID 3400 wrote to memory of 2604	3400	Solara v2.exe	101

C:\Users\Admin\AppData\Local\Temp\Solara v2.exe
"C:\Users\Admin\AppData\Local\Temp\Solara v2.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3400
- 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\Solara v2.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:616
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Solara v2.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4908
- 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\Roaming\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2624
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:220
- C:\Users\Admin\AppData\Local\Temp\utrtdl.exe
  "C:\Users\Admin\AppData\Local\Temp\utrtdl.exe"
  2⤵
  - Executes dropped EXE
  - Modifies registry class
  - Suspicious use of SetWindowsHookEx
  PID:2604

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 f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb
MD5 77d622bb1a5b250869a3238b9bc1402b
SHA1 d47f4003c2554b9dfc4c16f22460b331886b191b
SHA512 d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 0c557845aab1da497bbff0e8fbe65cabf4cb2804b97ba8ae8c695a528af70870
MD5 83685d101174171875b4a603a6c2a35c
SHA1 37be24f7c4525e17fa18dbd004186be3a9209017
SHA512 005a97a8e07b1840abdcef86a7881fd9bdc8acbfdf3eafe1dceb6374060626d81d789e57d87ca4096a39e28d5cca00f8945edff0a747591691ae75873d2b3fb5
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 2c1ef60b100ed3122cac5ee5aaa643076b463be0a993cd42e6ca550c8f496589
MD5 1e774522cc3cbdc78d24fd18a965fe60
SHA1 e5a2f12f4bcbda9e213f3c66106c5609ca6ebcef
SHA512 55c33b639c24055ba5047329eaef8e433849c1ea867f26f55482945180bac62c5f0ba79c93f0b3b551e2697155bf9d1fc9c316f1531bdfde4aad7580b627fe2b
MD5 SHA1 SHA512

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__PSScriptPolicyTest_wxnmqfsl.1gl.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_wxnmqfsl.1gl.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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utrtdl.exe

Path C:\Users\Admin\AppData\Local\Temp\utrtdl.exe
Size 14.2MB
SHA256 1cfcdce280b81e121d89cc219ecb6f1123089995706f097d4ba717e92f34b992
MD5 df891f7222feb3d251d3efa6b4c46b06
SHA1 af0a3da258ccef826fff4bb766b53cbbff6422d5
SHA512 7a3049a8ec996e3bf2e33cf9035841b95be107307ce4af434c7d67c69f5ff37c4fb7295bb6b794a2587c9988d3fa517791e42532c48ec42320ace6d0851cf2bf
SSDEEP 196608:0e7uMC7O/od6q1AOp2DpEQ5II53dMcalsCKjUvdr6DeL:0FMC7O/od68AOApfQ5iJk
MD5 SHA1 SHA512 SSDEEP

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memory/616-13-0x00007FFA8AA40000-0x00007FFA8B501000-memory.dmp

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memory/616-18-0x00007FFA8AA40000-0x00007FFA8B501000-memory.dmp

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memory/616-14-0x00007FFA8AA40000-0x00007FFA8B501000-memory.dmp

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memory/616-12-0x00007FFA8AA40000-0x00007FFA8B501000-memory.dmp

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memory/616-4-0x000001F73D970000-0x000001F73D992000-memory.dmp

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memory/616-17-0x00007FFA8AA40000-0x00007FFA8B501000-memory.dmp

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memory/2604-69-0x0000000000400000-0x0000000001F14000-memory.dmp

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memory/2604-70-0x0000000000400000-0x0000000001F14000-memory.dmp

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memory/2604-68-0x0000000000400000-0x0000000001F14000-memory.dmp

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memory/3400-54-0x00007FFA8AA40000-0x00007FFA8B501000-memory.dmp

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memory/3400-1-0x00007FFA8AA43000-0x00007FFA8AA45000-memory.dmp

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memory/3400-56-0x00007FFA8AA40000-0x00007FFA8B501000-memory.dmp

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memory/3400-55-0x00007FFA8AA43000-0x00007FFA8AA45000-memory.dmp

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memory/3400-0-0x00000000001B0000-0x00000000001EE000-memory.dmp

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