abe5a62227a4c6257a41282563572acb03afa8f40ba55ca5bfa3e3340ddef9d2

Analysis

max time kernel
151s
max time network
156s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
26/03/2024, 04:07

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General

Target

2024-03-26_f54206a430dd980f35028096aca7cd03_cryptolocker.exe
Size

93KB
MD5

f54206a430dd980f35028096aca7cd03
SHA1

f6b85a280d517f4d5db946f179defb8703452251
SHA256

abe5a62227a4c6257a41282563572acb03afa8f40ba55ca5bfa3e3340ddef9d2
SHA512

805b53f43e43f125a2749265886ac7cc079e53afdf7143eac7bf3241adfe16ddae16be27234bbd0bb16402c5b4b7cfd740779c5e7dc3b31ea48c3a363b3c1e61
SSDEEP

1536:zj+soPSMOtEvwDpj4ktBl01hJl8QAPM8Ho6cRDjgx/U:zCsanOtEvwDpjBU

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/5092-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x00050000000224ff-13.dat	CryptoLocker_rule2
behavioral2/memory/5092-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/4188-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/5092-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x00050000000224ff-13.dat	CryptoLocker_set1
behavioral2/memory/5092-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/4188-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/5092-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x00050000000224ff-13.dat	UPX
behavioral2/memory/5092-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/4188-26-0x0000000000500000-0x0000000000510000-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-1-5-21-609813121-2907144057-1731107329-1000\Control Panel\International\Geo\Nation	2024-03-26_f54206a430dd980f35028096aca7cd03_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
4188	misid.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/5092-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x00050000000224ff-13.dat	upx
behavioral2/memory/5092-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/4188-26-0x0000000000500000-0x0000000000510000-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 5092 wrote to memory of 4188	5092	2024-03-26_f54206a430dd980f35028096aca7cd03_cryptolocker.exe	88
PID 5092 wrote to memory of 4188	5092	2024-03-26_f54206a430dd980f35028096aca7cd03_cryptolocker.exe	88
PID 5092 wrote to memory of 4188	5092	2024-03-26_f54206a430dd980f35028096aca7cd03_cryptolocker.exe	88

C:\Users\Admin\AppData\Local\Temp\2024-03-26_f54206a430dd980f35028096aca7cd03_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-03-26_f54206a430dd980f35028096aca7cd03_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:5092
- C:\Users\Admin\AppData\Local\Temp\misid.exe
  "C:\Users\Admin\AppData\Local\Temp\misid.exe"
  2⤵
  - Executes dropped EXE
  PID:4188

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\misid.exe

Filesize
94KB

MD5
19199be5f9f1140038987301d665a6bc

SHA1
c42ac49ca59fbc107f340595aa6e19913e8c50df

SHA256
be80d1d607b822283bfeaf000f29dfdbf76ef58ffe0f5b4d07ad53c32d67df31

SHA512
dc64bd1814fcffeff249f53d1f33f7639f5cd288a398c2f06fd48b894ab038f9b1d85a37f47105b30f54eec6e9097fc8eb9f7d1ef50aad83e288f1d6347952c4

Download Submit
memory/4188-19-0x0000000000510000-0x0000000000516000-memory.dmp

Filesize
24KB

Download
memory/4188-25-0x00000000004E0000-0x00000000004E6000-memory.dmp

Filesize
24KB

Download
memory/4188-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5092-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/5092-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/5092-2-0x00000000006A0000-0x00000000006A6000-memory.dmp

Filesize
24KB

Download
memory/5092-3-0x00000000006D0000-0x00000000006D6000-memory.dmp

Filesize
24KB

Download
memory/5092-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download