xworm | 0cc35e594ffd17ad9d51f824445dc7e391a74535e575c9d638b0402cf49e612c

General

Target

Winrar Code Craker.exe
Size

4.0MB
MD5

0f34e7a485d0884daae6dec91541b742
SHA1

e366c430f4cf375dd96ca92edfe06ff165869e46
SHA256

0cc35e594ffd17ad9d51f824445dc7e391a74535e575c9d638b0402cf49e612c
SHA512

8e966e4a13beb16713a22bfd467f3fc18a81d47cbdf421ba113c5ec5b86a12011a50a82adf6b4e9bc6e37f6e8ca468420eaf30d62cab749a221e1f0b9a4018ec
SSDEEP

98304:YkhH66TO4Za+CtcszUqoLmO/AWyeT7DJgBSEpxEydq2EdtIONLG:c6QcBdCRWyen1zE7Ey8JdyONG

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

jynx.uncofig.com:1111

Attributes

Install_directory
%AppData%
install_file
svchost.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/files/0x000b000000023b8f-6.dat	family_xworm
behavioral2/memory/1064-13-0x0000000000070000-0x000000000008A000-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 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2484	powershell.exe
2436	powershell.exe
3904	powershell.exe
2636	powershell.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	helper.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	Winrar Code Craker.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
1064	helper.exe
232	winrar-x64-701fr.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-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Roaming\\svchost.exe"	helper.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
13	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1064	helper.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2436	powershell.exe
2436	powershell.exe
3904	powershell.exe
3904	powershell.exe
2636	powershell.exe
2636	powershell.exe
2484	powershell.exe
2484	powershell.exe
1064	helper.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1064	helper.exe
Token: SeDebugPrivilege	2436	powershell.exe
Token: SeDebugPrivilege	3904	powershell.exe
Token: SeDebugPrivilege	2636	powershell.exe
Token: SeDebugPrivilege	2484	powershell.exe
Token: SeDebugPrivilege	1064	helper.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
232	winrar-x64-701fr.exe
232	winrar-x64-701fr.exe
1064	helper.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1404 wrote to memory of 1064	1404	Winrar Code Craker.exe	83
PID 1404 wrote to memory of 1064	1404	Winrar Code Craker.exe	83
PID 1404 wrote to memory of 232	1404	Winrar Code Craker.exe	84
PID 1404 wrote to memory of 232	1404	Winrar Code Craker.exe	84
PID 1064 wrote to memory of 2436	1064	helper.exe	88
PID 1064 wrote to memory of 2436	1064	helper.exe	88
PID 1064 wrote to memory of 3904	1064	helper.exe	90
PID 1064 wrote to memory of 3904	1064	helper.exe	90
PID 1064 wrote to memory of 2636	1064	helper.exe	92
PID 1064 wrote to memory of 2636	1064	helper.exe	92
PID 1064 wrote to memory of 2484	1064	helper.exe	94
PID 1064 wrote to memory of 2484	1064	helper.exe	94

C:\Users\Admin\AppData\Local\Temp\Winrar Code Craker.exe
"C:\Users\Admin\AppData\Local\Temp\Winrar Code Craker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1404
- C:\Users\Admin\AppData\Roaming\helper.exe
  "C:\Users\Admin\AppData\Roaming\helper.exe"
  2⤵
  - Checks computer location settings
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: AddClipboardFormatListener
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1064
- - 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\helper.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2436
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'helper.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3904
- - 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\svchost.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2636
- - 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:2484
- C:\Users\Admin\AppData\Roaming\winrar-x64-701fr.exe
  "C:\Users\Admin\AppData\Roaming\winrar-x64-701fr.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetWindowsHookEx
  PID:232

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
944B

MD5
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

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

Filesize
944B

MD5
ce4540390cc4841c8973eb5a3e9f4f7d

SHA1
2293f30a6f4c9538bc5b06606c10a50ab4ecef8e

SHA256
e834e1da338b9644d538cefd70176768816da2556939c1255d386931bd085105

SHA512
2a3e466cb5a81d2b65256053b768a98321eb3e65ff46353eefc9864f14a391748116f050e7482ddd73a51575bf0a6fc5c673023dade62dbd8b174442bae1cc6b

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

Filesize
944B

MD5
da5c82b0e070047f7377042d08093ff4

SHA1
89d05987cd60828cca516c5c40c18935c35e8bd3

SHA256
77a94ef8c4258445d538a6006ffadb05afdf888f6f044e1e5466b981a07f16c5

SHA512
7360311a3c97b73dd3f6d7179cd979e0e20d69f380d38292447e17e369087d9dd5acb66cd0cbdd95ac4bfb16e5a1b86825f835a8d45b14ea9812102cff59704b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kzzlju0b.uii.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\helper.exe

Filesize
81KB

MD5
bac22f7b34e1324af3401020d4831867

SHA1
6240c0d1ab52a65738a958ca3c5e360f7f0a2b6f

SHA256
9541d84a204d6271f0ba7bdfa7513d7f555e7f73fbf0142acdb347b61a9f821d

SHA512
2f8d100c90b8a816504f64b594f1a6f7e300bd4f080d4926581f279dca594b7c8342ec941f175782b599cfdb823b60582097d045ba8b57a1826521dd1d283ab5

Download Submit
C:\Users\Admin\AppData\Roaming\winrar-x64-701fr.exe

Filesize
3.9MB

MD5
d512d8b27ad9910d66f8ce62086b413b

SHA1
4873eabfbb4280a0042a6b0bb65ca0eea0b72832

SHA256
1b8f832471a20e82b4252b81c63bb2cf6e3da335d889d877d5bacc4ae28f99a2

SHA512
4b69ee83456dfced538685984f381835bdc84fa9e4b297d1c213fda4e3dd166ce70a1639eb4ab8abbe59b64b7a9f87a7dbfefcbe45ee74d42d362138134f8ae4

Download Submit
memory/1064-13-0x0000000000070000-0x000000000008A000-memory.dmp

Filesize
104KB

Download
memory/1064-28-0x00007FF8BCC80000-0x00007FF8BD741000-memory.dmp

Filesize
10.8MB

Download
memory/1064-22-0x00007FF8BCC80000-0x00007FF8BD741000-memory.dmp

Filesize
10.8MB

Download
memory/1064-79-0x00007FF8BCC80000-0x00007FF8BD741000-memory.dmp

Filesize
10.8MB

Download
memory/1064-80-0x00007FF8BCC80000-0x00007FF8BD741000-memory.dmp

Filesize
10.8MB

Download
memory/1404-0-0x00007FF8BCC83000-0x00007FF8BCC85000-memory.dmp

Filesize
8KB

Download
memory/1404-1-0x00000000007D0000-0x0000000000BD0000-memory.dmp

Filesize
4.0MB

Download
memory/2436-35-0x000001C1C3500000-0x000001C1C3522000-memory.dmp

Filesize
136KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads