locky | 59ec54fb9b1d3415b54558977e3640b81bb3ebebdb61af3fc772e308c6b8eb3a

General

Target

230406-bzj2fsaf74.exe
Size

639KB
MD5

3c0447a8e05bc9ed43128ed22c22e23a
SHA1

0bf74262d4f57a3461088e1d96045ebbdeb43c21
SHA256

59ec54fb9b1d3415b54558977e3640b81bb3ebebdb61af3fc772e308c6b8eb3a
SHA512

f4ec59d7445ceabf7fe8fcd8be7752b5ae6db4a68bcf53d73419d515131f86c7eb8893999c9c60569f2b4f8fb27f5c1457c3177476c4dad6489fb15591c9fa44
SSDEEP

12288:2jZfZfZfZfZfZfZOZ2XsHUKwbNWuTncBxPMRS8SUC9H4jlNEz9vBiptAE43/:2jZfZfZfZfZfZfZOZ2XsHUK8ni0U8SU0

Score

10^/10

locky ransomware

Malware Config

Signatures

Locky
Ransomware strain released in 2016, with advanced features like anti-analysis.
ransomware locky
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1070.004

Inhibit System Recovery
T1490

Sets desktop wallpaper using registry 2 TTPs 1 IoCs

ransomware

Defacement

T1491

Modify Registry

T1112

Processes:

230406-bzj2fsaf74.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\Desktop\\ykcol.bmp"	230406-bzj2fsaf74.exe

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

System Information Discovery
T1082
Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
ransomware

File Deletion
T1070.004

Inhibit System Recovery
T1490

Processes:

vssadmin.exe

pid process

1940 vssadmin.exe

pid	process
1940	vssadmin.exe

Modifies Control Panel 2 IoCs

evasion

Processes:

230406-bzj2fsaf74.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\Desktop\WallpaperStyle = "0"	230406-bzj2fsaf74.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\Desktop\TileWallpaper = "0"	230406-bzj2fsaf74.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 940 vssvc.exe
Token: SeRestorePrivilege 940 vssvc.exe
Token: SeAuditPrivilege 940 vssvc.exe

description	pid	process
Token: SeBackupPrivilege	940	vssvc.exe
Token: SeRestorePrivilege	940	vssvc.exe
Token: SeAuditPrivilege	940	vssvc.exe

Suspicious use of WriteProcessMemory 5 IoCs

Processes:

230406-bzj2fsaf74.exe

description	pid	process	target process
PID 4476 wrote to memory of 4528	4476	230406-bzj2fsaf74.exe	msedge.exe
PID 4476 wrote to memory of 4528	4476	230406-bzj2fsaf74.exe	msedge.exe
PID 4476 wrote to memory of 1328	4476	230406-bzj2fsaf74.exe	cmd.exe
PID 4476 wrote to memory of 1328	4476	230406-bzj2fsaf74.exe	cmd.exe
PID 4476 wrote to memory of 1328	4476	230406-bzj2fsaf74.exe	cmd.exe

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

C:\Users\Admin\AppData\Local\Temp\230406-bzj2fsaf74.exe
"C:\Users\Admin\AppData\Local\Temp\230406-bzj2fsaf74.exe"
1⤵
- Sets desktop wallpaper using registry
- Modifies Control Panel
- Suspicious use of WriteProcessMemory
PID:4476

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument C:\Users\Admin\Desktop\ykcol.htm
2⤵
PID:4528

C:\Windows\SysWOW64\cmd.exe
cmd.exe /C del /Q /F "C:\Users\Admin\AppData\Local\Temp\230406-bzj2fsaf74.exe"
2⤵
PID:1328

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 --mojo-platform-channel-handle=4264 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
1⤵
PID:3724

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:940

C:\Windows\system32\vssadmin.exe
C:\Windows\system32\vssadmin.exe Delete Shadows /Quiet /All
1⤵
- Interacts with shadow copies
PID:1940

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --no-appcompat-clear --lang=en-US --js-flags=--ms-user-locale= --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=18 --mojo-platform-channel-handle=3964 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:1
1⤵
PID:1148

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --no-appcompat-clear --lang=en-US --js-flags=--ms-user-locale= --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=19 --mojo-platform-channel-handle=748 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:1
1⤵
PID:1900

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 --mojo-platform-channel-handle=4884 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
1⤵
PID:4612

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --no-appcompat-clear --disable-gpu-compositing --lang=en-US --js-flags=--ms-user-locale= --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=21 --mojo-platform-channel-handle=5420 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:1
1⤵
PID:3792

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 --no-appcompat-clear --mojo-platform-channel-handle=5892 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
1⤵
PID:2004

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

2

T1070

File Deletion

Modify Registry

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Inhibit System Recovery

2

T1490

Defacement

1

T1491

Resource Development

Reconnaissance

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Downloads

C:\Users\Default\ykcol-f9bf.htm
Filesize
8KB

MD5
5cf3c7ca15c3731e2df274cef0519212

SHA1
f0a19ea0864a94e6011a0e5b9934b3a7fee5f03f

SHA256
e5d33aaa43220f6f09c4330b69d7267b7bad0de43a582cfee770ecef95b3d53c

SHA512
db9f184c3f4099324152bcdeb7fa7b1915f256707c1df40870b7c8529a175914793a8891beb2c182d758d498e09d0cc1c5e031dbf810a29d23cf2092d0da6eca

Download Submit
memory/4476-1-0x0000000000400000-0x00000000004A3000-memory.dmp

Filesize
652KB

Download
memory/4476-3-0x0000000000400000-0x00000000004A3000-memory.dmp

Filesize
652KB

Download
memory/4476-0-0x0000000000530000-0x0000000000531000-memory.dmp

Filesize
4KB

Download
memory/4476-2-0x0000000000540000-0x0000000000541000-memory.dmp

Filesize
4KB

Download
memory/4476-4-0x0000000000400000-0x00000000004A3000-memory.dmp

Filesize
652KB

Download
memory/4476-6-0x0000000000400000-0x00000000004A3000-memory.dmp

Filesize
652KB

Download
memory/4476-203-0x0000000000400000-0x00000000004A3000-memory.dmp

Filesize
652KB

Download
memory/4476-312-0x0000000000400000-0x00000000004A3000-memory.dmp

Filesize
652KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads