xworm | e8fd34b40b83391a855905620e4beeb153d256df196b063bc7845d747f1e7d67

General

Target

Steam.exe
Size

51KB
MD5

eb794f3819b32c9fbc747309bb04cd68
SHA1

a6c24bfb6c2ea4cdf10f0f54c0a4e8ac0380beb3
SHA256

e8fd34b40b83391a855905620e4beeb153d256df196b063bc7845d747f1e7d67
SHA512

0b6cf31c799513b4e0f5ac21180cc7a26451fc54504f03ace353a5a8c598885c594b3375e990ac442e08ffaa1f3e9692cbf6dfb8c035b4380497cefd57288aaf
SSDEEP

768:juMMmVn76G3rspEacCIQgttZX+2V2ltnq7oTmggkbm1t+tuXSWCalOIhu//t/:SMDnv7sKEIHLXyBqCmjkbmn/weOImF/

Score

10^/10

xworm discovery rat trojan

Malware Config

Extracted

Family

xworm

C2

tree-cleaning.gl.at.ply.gg:33027

Attributes

install_file
USB.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral3/memory/3780-1-0x00000000003E0000-0x00000000003F4000-memory.dmp	family_xworm

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

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-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation	Steam.exe

Executes dropped EXE 1 IoCs

pid	Process
1540	nrvdck.exe

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
1704	msedge.exe
1704	msedge.exe

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nrvdck.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	3780	Steam.exe
Token: 33	1324	AUDIODG.EXE
Token: SeIncBasePriorityPrivilege	1324	AUDIODG.EXE

Suspicious use of WriteProcessMemory 5 IoCs

description	pid	Process	procid_target
PID 3780 wrote to memory of 4464	3780	Steam.exe	99
PID 3780 wrote to memory of 4464	3780	Steam.exe	99
PID 3780 wrote to memory of 1540	3780	Steam.exe	119
PID 3780 wrote to memory of 1540	3780	Steam.exe	119
PID 3780 wrote to memory of 1540	3780	Steam.exe	119

C:\Users\Admin\AppData\Local\Temp\Steam.exe
"C:\Users\Admin\AppData\Local\Temp\Steam.exe"
1⤵
- Checks computer location settings
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3780
- C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument http://guns.lol/tuesday.cs
  2⤵
  PID:4464
- C:\Users\Admin\AppData\Local\Temp\nrvdck.exe
  "C:\Users\Admin\AppData\Local\Temp\nrvdck.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  PID:1540

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 --field-trial-handle=4412,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=4448 /prefetch:8
1⤵
PID:4868

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 --field-trial-handle=3876,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=3944 /prefetch:8
1⤵
PID:2448

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --video-capture-use-gpu-memory-buffer --lang=en-US --js-flags=--ms-user-locale= --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=18 --field-trial-handle=1296,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=3832 /prefetch:1
1⤵
PID:3348

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --video-capture-use-gpu-memory-buffer --lang=en-US --js-flags=--ms-user-locale= --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=17 --field-trial-handle=4448,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=4800 /prefetch:1
1⤵
PID:1672

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 --field-trial-handle=5424,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=5436 /prefetch:8
1⤵
PID:2680

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=entity_extraction_service.mojom.Extractor --lang=en-US --service-sandbox-type=entity_extraction --onnx-enabled-for-ee --field-trial-handle=5444,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=2324 /prefetch:8
1⤵
PID:540

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --js-flags=--ms-user-locale= --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=21 --field-trial-handle=5924,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=5860 /prefetch:1
1⤵
PID:2304

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --js-flags=--ms-user-locale= --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=22 --field-trial-handle=6112,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=5228 /prefetch:1
1⤵
PID:5072

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --js-flags=--ms-user-locale= --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=23 --field-trial-handle=5952,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=4400 /prefetch:1
1⤵
PID:3180

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --enable-dinosaur-easter-egg-alt-images --disable-gpu-compositing --video-capture-use-gpu-memory-buffer --lang=en-US --js-flags=--ms-user-locale= --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=24 --field-trial-handle=5980,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=6004 /prefetch:1
1⤵
PID:708

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --field-trial-handle=5976,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=6452 /prefetch:8
1⤵
PID:3268

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=audio.mojom.AudioService --lang=en-US --service-sandbox-type=audio --field-trial-handle=6400,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=6672 /prefetch:8
1⤵
PID:4272

C:\Windows\system32\AUDIODG.EXE
C:\Windows\system32\AUDIODG.EXE 0x2ec 0x4a8
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1324

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=media.mojom.CdmServiceBroker --lang=en-US --service-sandbox-type=cdm --field-trial-handle=5252,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=5600 /prefetch:8
1⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
PID:1704

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=edge_collections.mojom.CollectionsDataManager --lang=en-US --service-sandbox-type=collections --field-trial-handle=6600,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=6452 /prefetch:8
1⤵
PID:880

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=edge_search_indexer.mojom.SearchIndexerInterfaceBroker --lang=en-US --service-sandbox-type=search_indexer --message-loop-type-ui --field-trial-handle=6952,i,1602949858158667699,12464335823361976127,262144 --variations-seed-version --mojo-platform-channel-handle=6968 /prefetch:8
1⤵
PID:1316

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\nrvdck.exe

Filesize
131KB

MD5
bd65d387482def1fe00b50406f731763

SHA1
d06a2ba2e29228f443f97d1dd3a8da5dd7df5903

SHA256
1ab7375550516d7445c47fd9b551ed864f227401a14ff3f1ff0d70caca3bd997

SHA512
351ecd109c4d49bc822e8ade73a9516c4a531ebcda63546c155e677dcff19708068dc588b2fcf30cad086238e8b206fc5f349d37dda02d3c3a8d9b570d92e4d9

Download Submit
memory/3780-0-0x00007FFBBCC83000-0x00007FFBBCC85000-memory.dmp

Filesize
8KB

Download
memory/3780-1-0x00000000003E0000-0x00000000003F4000-memory.dmp

Filesize
80KB

Download
memory/3780-2-0x00007FFBBCC80000-0x00007FFBBD741000-memory.dmp

Filesize
10.8MB

Download
memory/3780-3-0x00007FFBBCC83000-0x00007FFBBCC85000-memory.dmp

Filesize
8KB

Download
memory/3780-4-0x00007FFBBCC80000-0x00007FFBBD741000-memory.dmp

Filesize
10.8MB

Download
memory/3780-14-0x00007FFBBCC80000-0x00007FFBBD741000-memory.dmp

Filesize
10.8MB

Download

Analysis

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