e61f3950f4d3a30bf25233f7cc9fcf89dd6ef013c7943c68ca1062e2eb239d68

Analysis

max time kernel
142s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
29/05/2024, 16:34

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General

Target

2024-05-29_6c322ff59af420c129f0f626ed461226_cryptolocker.exe
Size

60KB
MD5

6c322ff59af420c129f0f626ed461226
SHA1

cc73a4b1ab20445047d40837c6301501150a7795
SHA256

e61f3950f4d3a30bf25233f7cc9fcf89dd6ef013c7943c68ca1062e2eb239d68
SHA512

631d57970a05d8feb156cdae39cbe2184af8792f99afd96b4f72617828a73e6fad4a49f177469b69fc563620f26eaaaba71c793273c966ec244a160e0fd0b12e
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAP6pUzh:H6QFElP6n+gou9cvMOtEvwDpjCpVXCh

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/1604-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x000e000000023240-13.dat	CryptoLocker_rule2
behavioral2/memory/1604-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4136-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/1604-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x000e000000023240-13.dat	CryptoLocker_set1
behavioral2/memory/1604-24-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4136-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/1604-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x000e000000023240-13.dat	UPX
behavioral2/memory/1604-24-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4136-26-0x0000000000500000-0x0000000000510000-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	2024-05-29_6c322ff59af420c129f0f626ed461226_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4136	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/1604-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x000e000000023240-13.dat	upx
behavioral2/memory/1604-24-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4136-26-0x0000000000500000-0x0000000000510000-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 1604 wrote to memory of 4136	1604	2024-05-29_6c322ff59af420c129f0f626ed461226_cryptolocker.exe	91
PID 1604 wrote to memory of 4136	1604	2024-05-29_6c322ff59af420c129f0f626ed461226_cryptolocker.exe	91
PID 1604 wrote to memory of 4136	1604	2024-05-29_6c322ff59af420c129f0f626ed461226_cryptolocker.exe	91

C:\Users\Admin\AppData\Local\Temp\2024-05-29_6c322ff59af420c129f0f626ed461226_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-29_6c322ff59af420c129f0f626ed461226_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:1604
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:4136

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=4440 --field-trial-handle=2248,i,10247514684337323751,15511974759131734137,262144 --variations-seed-version /prefetch:8
1⤵
PID:1064

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
61KB

MD5
fc01f2624b759ab78a0004704b4f1517

SHA1
4193ff3dadc64ccb553124ede541442d59d2df96

SHA256
2729590ea55f8f2199a1fba441acc571d4f4b3ad3c9f592504af5b34d42efbf5

SHA512
054bb1b2945d4ff0a88f9026d0a6d7e6e6252910643df2c3add40689332c172144bad878a00a2e22b08d66335b2dec309edd159c7ef91f14019344d7b1806daa

Download Submit
memory/1604-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1604-1-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/1604-2-0x0000000000620000-0x0000000000626000-memory.dmp

Filesize
24KB

Download
memory/1604-3-0x0000000000750000-0x0000000000756000-memory.dmp

Filesize
24KB

Download
memory/1604-24-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4136-18-0x0000000001F70000-0x0000000001F76000-memory.dmp

Filesize
24KB

Download
memory/4136-25-0x0000000000660000-0x0000000000666000-memory.dmp

Filesize
24KB

Download
memory/4136-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download