xworm | 8f2d3eeab5e5d807acff4be9b7d6b41340f0c8a891baa094543d10e65ccec7f2

General

Target

Shellbag anylizer.exe
Size

69KB
MD5

a498059077fb136b7d57ef6f00dcae46
SHA1

77421f91ed2c1586419128bd4687241050d712cc
SHA256

8f2d3eeab5e5d807acff4be9b7d6b41340f0c8a891baa094543d10e65ccec7f2
SHA512

3bec766aa97ed8b89c8be1c4da89befc5f22217637f72d158753996b2ed74439cf485e7692f4f1fa522d31ceb608c86b9035e9c594fcb147a91edf4547ac14c3
SSDEEP

1536:bS3U8pWjIK2vvt8yAnkEZ6sPvWybW46zaQInA6dylkYcdOisYt2jNsXr:bWfWjXENk6wpbW4B9SSOisYsxer

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%Temp%
install_file
svchost.exe
pastebin_url
https://pastebin.com/raw/qEVZXv39

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/3148-0-0x0000000000E00000-0x0000000000E18000-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
1244	powershell.exe
3400	powershell.exe
3520	powershell.exe
1404	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-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	Shellbag anylizer.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	Shellbag anylizer.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\svchost.lnk	Shellbag anylizer.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-1-5-21-1181767204-2009306918-3718769404-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\svchost = "C:\\Users\\Admin\\AppData\\Local\\Temp\\svchost.exe"	Shellbag anylizer.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 38 IoCs

Web Service

T1102

flow	ioc
18	pastebin.com
77	pastebin.com
21	pastebin.com
51	pastebin.com
56	pastebin.com
73	pastebin.com
76	pastebin.com
7	pastebin.com
14	pastebin.com
40	pastebin.com
46	pastebin.com
52	pastebin.com
71	pastebin.com
31	pastebin.com
36	pastebin.com
41	pastebin.com
66	pastebin.com
74	pastebin.com
78	pastebin.com
32	pastebin.com
39	pastebin.com
33	pastebin.com
37	pastebin.com
16	pastebin.com
17	pastebin.com
67	pastebin.com
44	pastebin.com
48	pastebin.com
68	pastebin.com
72	pastebin.com
75	pastebin.com
19	pastebin.com
53	pastebin.com
42	pastebin.com
43	pastebin.com
80	pastebin.com
34	pastebin.com
35	pastebin.com

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
3	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 12 IoCs

pid	Process
1404	powershell.exe
1404	powershell.exe
1404	powershell.exe
1244	powershell.exe
1244	powershell.exe
1244	powershell.exe
3400	powershell.exe
3400	powershell.exe
3400	powershell.exe
3520	powershell.exe
3520	powershell.exe
3520	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	3148	Shellbag anylizer.exe
Token: SeDebugPrivilege	1404	powershell.exe
Token: SeDebugPrivilege	1244	powershell.exe
Token: SeDebugPrivilege	3400	powershell.exe
Token: SeDebugPrivilege	3520	powershell.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3148 wrote to memory of 1404	3148	Shellbag anylizer.exe	96
PID 3148 wrote to memory of 1404	3148	Shellbag anylizer.exe	96
PID 3148 wrote to memory of 1244	3148	Shellbag anylizer.exe	98
PID 3148 wrote to memory of 1244	3148	Shellbag anylizer.exe	98
PID 3148 wrote to memory of 3400	3148	Shellbag anylizer.exe	100
PID 3148 wrote to memory of 3400	3148	Shellbag anylizer.exe	100
PID 3148 wrote to memory of 3520	3148	Shellbag anylizer.exe	102
PID 3148 wrote to memory of 3520	3148	Shellbag anylizer.exe	102

C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe
"C:\Users\Admin\AppData\Local\Temp\Shellbag anylizer.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3148
- 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\Shellbag anylizer.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1404
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Shellbag anylizer.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1244
- 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\svchost.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3400
- 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:3520

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 --field-trial-handle=3244,i,17096020621006928097,15544233752327415349,262144 --variations-seed-version --mojo-platform-channel-handle=3580 /prefetch:8
1⤵
PID:3848

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 --field-trial-handle=3984,i,17096020621006928097,15544233752327415349,262144 --variations-seed-version --mojo-platform-channel-handle=4108 /prefetch:8
1⤵
PID:3780

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

Web Service

1

T1102

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
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

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

Filesize
944B

MD5
eb1ad317bd25b55b2bbdce8a28a74a94

SHA1
98a3978be4d10d62e7411946474579ee5bdc5ea6

SHA256
9e94e7c9ac6134ee30e79498558aa1a5a1ac79a643666c3f8922eed215dd3a98

SHA512
d011f266c0240d84470c0f9577cd9e4927309bd19bb38570ca9704ed8e1d159f9bea982a59d3eefef72ce7a10bd81208b82e88ef57c7af587f7437a89769adc0

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

Filesize
944B

MD5
34f595487e6bfd1d11c7de88ee50356a

SHA1
4caad088c15766cc0fa1f42009260e9a02f953bb

SHA256
0f9a4b52e01cb051052228a55d0515911b7ef5a8db3cf925528c746df511424d

SHA512
10976c5deaf9fac449e703e852c3b08d099f430de2d7c7b8e2525c35d63e28b890e5aab63feff9b20bca0aaf9f35a3ba411aee3fbeee9ea59f90ed25bd617a0b

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jbozpjol.od5.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1404-3-0x00007FFCBBCD0000-0x00007FFCBC791000-memory.dmp

Filesize
10.8MB

Download
memory/1404-14-0x00007FFCBBCD0000-0x00007FFCBC791000-memory.dmp

Filesize
10.8MB

Download
memory/1404-15-0x00007FFCBBCD0000-0x00007FFCBC791000-memory.dmp

Filesize
10.8MB

Download
memory/1404-18-0x00007FFCBBCD0000-0x00007FFCBC791000-memory.dmp

Filesize
10.8MB

Download
memory/1404-9-0x00000214F1C50000-0x00000214F1C72000-memory.dmp

Filesize
136KB

Download
memory/3148-1-0x00007FFCBBCD3000-0x00007FFCBBCD5000-memory.dmp

Filesize
8KB

Download
memory/3148-2-0x00007FFCBBCD0000-0x00007FFCBC791000-memory.dmp

Filesize
10.8MB

Download
memory/3148-0-0x0000000000E00000-0x0000000000E18000-memory.dmp

Filesize
96KB

Download
memory/3148-57-0x00007FFCBBCD0000-0x00007FFCBC791000-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