e59746a9806739913f29baca31a4aeac0e7091d5565fbcb8b21519d461e588df

Analysis

max time kernel
148s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
01/06/2024, 13:37

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General

Target

2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe
Size

40KB
MD5

a8391e40fd49dd362044ade1b9694765
SHA1

423593e69ddd3a78973b775f55ad413ac3261f87
SHA256

e59746a9806739913f29baca31a4aeac0e7091d5565fbcb8b21519d461e588df
SHA512

1cf3e7c6997a631baa2310e8fe0962b20538ba9bb9055cf44b67af2424e40da3e151ef6fd6bd487c3c08999925e709d1d99e5c83d8573b455bd0f3b15c1682ba
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYX5b:qDdFJy3QMOtEvwDpjjWMl7TQ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2748-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000800000002326d-13.dat	CryptoLocker_rule2
behavioral2/memory/2748-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2120-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2748-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000800000002326d-13.dat	CryptoLocker_set1
behavioral2/memory/2748-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2120-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2748-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000800000002326d-13.dat	UPX
behavioral2/memory/2748-26-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2120-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

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	2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2120	asih.exe

UPX packed file 4 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/2748-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000800000002326d-13.dat	upx
behavioral2/memory/2748-26-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2120-27-0x0000000000500000-0x0000000000510000-memory.dmp	upx

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 2748 wrote to memory of 2120	2748	2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe	91
PID 2748 wrote to memory of 2120	2748	2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe	91
PID 2748 wrote to memory of 2120	2748	2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-01_a8391e40fd49dd362044ade1b9694765_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2748
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2120

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=4340 --field-trial-handle=2252,i,16022092570067181109,3235558581947505669,262144 --variations-seed-version /prefetch:8
1⤵
PID:2208

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

Replay Monitor

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Downloads

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

Filesize
40KB

MD5
e5cb61d6148d6a14afca252f087a900d

SHA1
4e49930d93a9515ad7d2566b5289407ef17187b4

SHA256
1755e8393d8bdc215d3de9657c1064327890cc8a7e91437cc1338a6d6b5a84bf

SHA512
d51cda614815791cb1ebb26cea06b557d579a988797ac79c105db58e58a8f81e2cc8875f1125a55a143e5ab6c5806f81375accaa6a17523f9758dd92a9df7e86

Download Submit
memory/2120-18-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2120-24-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2120-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2748-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2748-1-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/2748-2-0x00000000006F0000-0x00000000006F6000-memory.dmp

Filesize
24KB

Download
memory/2748-3-0x0000000000710000-0x0000000000716000-memory.dmp

Filesize
24KB

Download
memory/2748-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download