xworm | a9720210f921e58821c983337e8b8188b37695ded19ac4655eec223ee138638a

General

Target

NerestPC.exe
Size

5.0MB
MD5

36ce218e741638ecff00c9a8a4bafee4
SHA1

7a99e8d39c9fc5d6526a1230d68f08ce38007a8e
SHA256

0c94444657b966a20aabb6df5917cb801d5587a6d8948516f1c18254965047f8
SHA512

0aeff3cd96d3788d054e841f4335149c18337ac9e934ad8da90a27294d506aafc96c3527bc17baddc5d52ea4bef4a88308dd36859d40eda7d50bf2806ad2cb1d
SSDEEP

6144:F9A6JRlmHikG0dE74e1iAkfLPfglyunnoU8S+P2N3DrrFGP:MSKik2ke1iNglymC25DrrFG

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

early-doll.gl.at.ply.gg:17002

purpose-terror.gl.at.ply.gg:19882

Attributes

Install_directory
%AppData%
install_file
java.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/files/0x0008000000023c90-6.dat	family_xworm
behavioral1/files/0x0007000000023c91-17.dat	family_xworm
behavioral1/memory/4360-27-0x0000000000550000-0x000000000056A000-memory.dmp	family_xworm
behavioral1/memory/4904-26-0x0000000000630000-0x0000000000648000-memory.dmp	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 8 IoCs

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

execution

PowerShell

T1059.001

pid	Process
632	powershell.exe
1868	powershell.exe
3276	powershell.exe
4408	powershell.exe
2004	powershell.exe
2648	powershell.exe
1928	powershell.exe
5040	powershell.exe

Checks computer location settings 2 TTPs 3 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-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	NerestPC.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	javav.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	narost.exe

Drops startup file 4 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
4360	javav.exe
4904	narost.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\ProgramData\\svchost.exe"	narost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\java = "C:\\Users\\Admin\\AppData\\Roaming\\java.exe"	javav.exe

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 18 IoCs

pid	Process
4408	powershell.exe
2004	powershell.exe
4408	powershell.exe
2004	powershell.exe
2648	powershell.exe
1928	powershell.exe
1928	powershell.exe
2648	powershell.exe
5040	powershell.exe
5040	powershell.exe
632	powershell.exe
632	powershell.exe
1868	powershell.exe
1868	powershell.exe
3276	powershell.exe
3276	powershell.exe
4904	narost.exe
4360	javav.exe

Suspicious use of AdjustPrivilegeToken 12 IoCs

description	pid	Process
Token: SeDebugPrivilege	4904	narost.exe
Token: SeDebugPrivilege	4360	javav.exe
Token: SeDebugPrivilege	4408	powershell.exe
Token: SeDebugPrivilege	2004	powershell.exe
Token: SeDebugPrivilege	2648	powershell.exe
Token: SeDebugPrivilege	1928	powershell.exe
Token: SeDebugPrivilege	5040	powershell.exe
Token: SeDebugPrivilege	632	powershell.exe
Token: SeDebugPrivilege	1868	powershell.exe
Token: SeDebugPrivilege	3276	powershell.exe
Token: SeDebugPrivilege	4904	narost.exe
Token: SeDebugPrivilege	4360	javav.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
4904	narost.exe
4360	javav.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 3068 wrote to memory of 4360	3068	NerestPC.exe	84
PID 3068 wrote to memory of 4360	3068	NerestPC.exe	84
PID 3068 wrote to memory of 4904	3068	NerestPC.exe	85
PID 3068 wrote to memory of 4904	3068	NerestPC.exe	85
PID 4360 wrote to memory of 4408	4360	javav.exe	87
PID 4360 wrote to memory of 4408	4360	javav.exe	87
PID 4904 wrote to memory of 2004	4904	narost.exe	88
PID 4904 wrote to memory of 2004	4904	narost.exe	88
PID 4360 wrote to memory of 2648	4360	javav.exe	91
PID 4360 wrote to memory of 2648	4360	javav.exe	91
PID 4904 wrote to memory of 1928	4904	narost.exe	93
PID 4904 wrote to memory of 1928	4904	narost.exe	93
PID 4904 wrote to memory of 5040	4904	narost.exe	95
PID 4904 wrote to memory of 5040	4904	narost.exe	95
PID 4360 wrote to memory of 632	4360	javav.exe	97
PID 4360 wrote to memory of 632	4360	javav.exe	97
PID 4904 wrote to memory of 1868	4904	narost.exe	99
PID 4904 wrote to memory of 1868	4904	narost.exe	99
PID 4360 wrote to memory of 3276	4360	javav.exe	101
PID 4360 wrote to memory of 3276	4360	javav.exe	101

C:\Users\Admin\AppData\Local\Temp\NerestPC.exe
"C:\Users\Admin\AppData\Local\Temp\NerestPC.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3068
- C:\Users\Admin\AppData\Local\Temp\javav.exe
  "C:\Users\Admin\AppData\Local\Temp\javav.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4360
- - 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\javav.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4408
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'javav.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2648
- - 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\java.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:632
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'java.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3276
- C:\Users\Admin\AppData\Local\Temp\narost.exe
  "C:\Users\Admin\AppData\Local\Temp\narost.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:4904
- - 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\narost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2004
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'narost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1928
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:5040
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1868

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
796B

MD5
0781480bf2350bd775a7a0592c95ad57

SHA1
53d3ee88c4f89de098d8a5a7ac429c1dacc67d90

SHA256
0f42c7bd12227c6e1160b0bc85899469e2d30441166e5ab6a65cb4eed97497b4

SHA512
7d123bd9cbdaad6cb0fd86b0e737409e45d86ad8bf506e707fd1cc00e41809fb840a9caa8e05bc2726704ccfdd2f0df51012d5539f7dc2387970072a47f55701

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
15dde0683cd1ca19785d7262f554ba93

SHA1
d039c577e438546d10ac64837b05da480d06bf69

SHA256
d6fa39eab7ee36f44dc3f9f2839d098433db95c1eba924e4bcf4e5c0d268d961

SHA512
57c0e1b87bc1c136f0d39f3ce64bb8f8274a0491e4ca6e45e5c7f9070aa9d9370c6f590ce37cd600b252df2638d870205249a514c43245ca7ed49017024a4672

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
d8cb3e9459807e35f02130fad3f9860d

SHA1
5af7f32cb8a30e850892b15e9164030a041f4bd6

SHA256
2b139c74072ccbdaa17b950f32a6dbc934dfb7af9973d97c9b0d9c498012ba68

SHA512
045239ba31367fbdd59e883f74eafc05724e23bd6e8f0c1e7171ea2496a497eb9e0cfcb57285bb81c4d569daadba43d6ef64c626ca48f1e2a59e8d97f0cc9184

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_14cz0fgf.wwy.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\javav.exe

Filesize
80KB

MD5
aa534db340b1b35db372e813adb5b455

SHA1
f804f2ff56c5ef470e9d3c10870b1a51ccb8935e

SHA256
548db9521bf2d74ea3a1fbe5e6500be2e64fd00f8794661af90fdffc4e4f7b06

SHA512
6b24c74990e9fd8f42819b0a6f0e51f63556ac71ea2bcbd755dfe7ee53d8027b3bd3765bc1aad69c65300d9c5d3649c479cf392487bb9c57b9503b88a8cfd3bb

Download Submit
C:\Users\Admin\AppData\Local\Temp\narost.exe

Filesize
69KB

MD5
9780dbb7a7441d01b52c00d4c99f3a4f

SHA1
ec64405fac16aa937f30810ff333e18f80041811

SHA256
4df3aa6eb3e855fa2cf99659d58e112c976501c52d29bbe507b71a6f297791ac

SHA512
a5b4ad0f753fa755b5ee59faf4606c0a9c313c2b415efa3f162e6a0b8e46920cca90cd5b470c744304fc650160ef3d8f5813ab17c03202828f9062a76b4ec94c

Download Submit
memory/3068-1-0x0000000000B10000-0x0000000000B72000-memory.dmp

Filesize
392KB

Download
memory/3068-10-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download
memory/3068-0-0x00007FFFA2C73000-0x00007FFFA2C75000-memory.dmp

Filesize
8KB

Download
memory/3068-29-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download
memory/4360-27-0x0000000000550000-0x000000000056A000-memory.dmp

Filesize
104KB

Download
memory/4360-28-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download
memory/4360-130-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download
memory/4360-131-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download
memory/4360-134-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download
memory/4408-36-0x000002376F450000-0x000002376F472000-memory.dmp

Filesize
136KB

Download
memory/4904-30-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download
memory/4904-26-0x0000000000630000-0x0000000000648000-memory.dmp

Filesize
96KB

Download
memory/4904-125-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download
memory/4904-132-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download
memory/4904-133-0x00007FFFA2C70000-0x00007FFFA3731000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads