690dbb9adfe55efaaa843807d58b3067f2f8da1ec331de00e2138e5182e6e96b

Analysis

max time kernel
145s
max time network
154s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
27-03-2024 05:43

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General

Target

2024-03-27_b19ab53c9eae891c0cf528dae6b86b5e_cryptolocker.exe
Size

63KB
MD5

b19ab53c9eae891c0cf528dae6b86b5e
SHA1

5a513b2a84f4c19fd53d7089d3df67b03cc5132e
SHA256

690dbb9adfe55efaaa843807d58b3067f2f8da1ec331de00e2138e5182e6e96b
SHA512

8d308a9162d048f56788346bc7520cb14751c1778aac8204b0d8dc5e967095106c8a2e32cafd4f98aac2d6f4aaf647d113588554fc578d508bd372a9f9a8565e
SSDEEP

768:6Qz7yVEhs9+4OR7tOOtEvwDpjLHqPOYRmNxt5I52kGEKI+:6j+1NMOtEvwDpjr8ox8UDEKF

Score

9^/10

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/2616-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023251-13.dat	CryptoLocker_rule2
behavioral2/memory/4916-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2616-23-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4916-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/2616-0-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023251-13.dat	CryptoLocker_set1
behavioral2/memory/4916-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2616-23-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4916-27-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

Detects executables built or packed with MPress PE compressor 5 IoCs

resource	yara_rule
behavioral2/memory/2616-0-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/files/0x0008000000023251-13.dat	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4916-17-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/2616-23-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress
behavioral2/memory/4916-27-0x0000000000500000-0x000000000050F000-memory.dmp	INDICATOR_EXE_Packed_MPress

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-1-5-21-3808065738-1666277613-1125846146-1000\Control Panel\International\Geo\Nation	2024-03-27_b19ab53c9eae891c0cf528dae6b86b5e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4916	misid.exe

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

System Information Discovery
T1082

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2616 wrote to memory of 4916	2616	2024-03-27_b19ab53c9eae891c0cf528dae6b86b5e_cryptolocker.exe	100
PID 2616 wrote to memory of 4916	2616	2024-03-27_b19ab53c9eae891c0cf528dae6b86b5e_cryptolocker.exe	100
PID 2616 wrote to memory of 4916	2616	2024-03-27_b19ab53c9eae891c0cf528dae6b86b5e_cryptolocker.exe	100

C:\Users\Admin\AppData\Local\Temp\2024-03-27_b19ab53c9eae891c0cf528dae6b86b5e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-27_b19ab53c9eae891c0cf528dae6b86b5e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2616
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:4916

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=1400 --field-trial-handle=2256,i,6670388345726423024,18382795228658886258,262144 --variations-seed-version /prefetch:8
1⤵
PID:4948

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
63KB

MD5
01d711d5abed9b842a6dc17eec20a857

SHA1
5614e51754d480e23152fe98ee13f27d518d285a

SHA256
7466d152d83dc06c91b419668dd451eea1ee90405ce96c7cd1045350ce96fca8

SHA512
b02117d504fa77254999e60cc5a20bf5563de44179fe7bf3d56a0148d22ff9969d4a3ff051ec9ebe9af76e192b11bc365019c21c464dbad743c0084e6b3e074d

Download Submit
memory/2616-0-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2616-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2616-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2616-3-0x0000000002080000-0x0000000002086000-memory.dmp

Filesize
24KB

Download
memory/2616-23-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4916-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/4916-19-0x00000000005B0000-0x00000000005B6000-memory.dmp

Filesize
24KB

Download
memory/4916-20-0x00000000005D0000-0x00000000005D6000-memory.dmp

Filesize
24KB

Download
memory/4916-27-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download