52da5c71f45f4ee46cc82126c8aae71e5c7f2e4ff8a445bf2828ea4f1021b284

General

Target

2024-06-25_88ce472bc65985e9c742278692c7632e_cryptolocker.exe
Size

36KB
MD5

88ce472bc65985e9c742278692c7632e
SHA1

f82000539e3cb11a5ed57673f7a06cc106645c81
SHA256

52da5c71f45f4ee46cc82126c8aae71e5c7f2e4ff8a445bf2828ea4f1021b284
SHA512

189c605f4543c2e0fca5af35950cc8f67fb26e9a4b6a1fdaadc2a6cb322a17af2b7d56a3326e37613a56db524bca83d5270ca21e48ddb53aecf9b2921e22013e
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITe:qDdFJy3QMOtEvwDpjjWMl7Te

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral2/memory/3688-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3688-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3688-11-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023253-15.dat	CryptoLocker_rule2
behavioral2/memory/1796-29-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral2/memory/3688-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3688-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3688-11-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023253-15.dat	CryptoLocker_set1
behavioral2/memory/1796-29-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral2/memory/3688-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3688-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3688-11-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023253-15.dat	UPX
behavioral2/memory/1796-29-0x0000000000500000-0x0000000000510000-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	2024-06-25_88ce472bc65985e9c742278692c7632e_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
1796	asih.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/3688-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3688-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3688-11-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023253-15.dat	upx
behavioral2/memory/1796-29-0x0000000000500000-0x0000000000510000-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 3688 wrote to memory of 1796	3688	2024-06-25_88ce472bc65985e9c742278692c7632e_cryptolocker.exe	94
PID 3688 wrote to memory of 1796	3688	2024-06-25_88ce472bc65985e9c742278692c7632e_cryptolocker.exe	94
PID 3688 wrote to memory of 1796	3688	2024-06-25_88ce472bc65985e9c742278692c7632e_cryptolocker.exe	94

C:\Users\Admin\AppData\Local\Temp\2024-06-25_88ce472bc65985e9c742278692c7632e_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-06-25_88ce472bc65985e9c742278692c7632e_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3688
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:1796

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=4140 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:8
1⤵
PID:4668

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

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
36KB

MD5
6c7fe2125cdbe8a9657e4df7979eb96e

SHA1
dc6cc15037f1aeb60ecc58e7f437cefbc8394e75

SHA256
c2b68069b3d885efa312057ff8442794afa2b8bb990c83ce7c7fed55b4f18433

SHA512
fd5e487e00fbc7e728fad31460b06f2794e3500f944e141c0531e015ed7217c4ff6324296dc3d20bf4891e50d6e93f48fde0a198936b3684b9547f1618fefc5d

Download Submit
memory/1796-21-0x0000000000520000-0x0000000000526000-memory.dmp

Filesize
24KB

Download
memory/1796-22-0x00000000006C0000-0x00000000006C6000-memory.dmp

Filesize
24KB

Download
memory/1796-29-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3688-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3688-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/3688-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3688-3-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3688-4-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3688-11-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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