3973676bd47470c6a5a2c391ecd2c55664dfd6f39c64fb52a25ccdda9149e7fa

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
23-05-2024 00:51

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General

Target

2024-05-23_c752ce9e8f582a88c7477b168eccd25b_cryptolocker.exe
Size

60KB
MD5

c752ce9e8f582a88c7477b168eccd25b
SHA1

47da5acef84640116ec7a70f3c929080204b0de1
SHA256

3973676bd47470c6a5a2c391ecd2c55664dfd6f39c64fb52a25ccdda9149e7fa
SHA512

4f1be7122e1b1c968a88df2b9d063b744caa3cb2a4fa3d8f34e2d202c139282db7d95a444723a34d0f2cea4bd3167f3a6563fcd549129726bda3e72bfea874ae
SSDEEP

768:H6LsoEEeegiZPvEhHSG+gk5NQXtckstOOtEvwDpjhBaD3TUogs/VXpAP6pr:H6QFElP6n+gou9cvMOtEvwDpjCpVXl

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4676-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral2/memory/4676-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/3128-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4676-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
C:\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral2/memory/4676-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/3128-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

Processes:

resource	yara_rule
behavioral2/memory/4676-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
C:\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral2/memory/4676-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/3128-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_c752ce9e8f582a88c7477b168eccd25b_cryptolocker.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation	2024-05-23_c752ce9e8f582a88c7477b168eccd25b_cryptolocker.exe

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

3128 asih.exe

pid	process
3128	asih.exe

UPX packed file 4 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/4676-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
C:\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral2/memory/4676-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/3128-26-0x0000000000500000-0x0000000000510000-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

Processes:

2024-05-23_c752ce9e8f582a88c7477b168eccd25b_cryptolocker.exe

description	pid	process	target process
PID 4676 wrote to memory of 3128	4676	2024-05-23_c752ce9e8f582a88c7477b168eccd25b_cryptolocker.exe	asih.exe
PID 4676 wrote to memory of 3128	4676	2024-05-23_c752ce9e8f582a88c7477b168eccd25b_cryptolocker.exe	asih.exe
PID 4676 wrote to memory of 3128	4676	2024-05-23_c752ce9e8f582a88c7477b168eccd25b_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-05-23_c752ce9e8f582a88c7477b168eccd25b_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-23_c752ce9e8f582a88c7477b168eccd25b_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4676

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:3128

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
60KB

MD5
25e8906a517d8c470b17673ddf5e141d

SHA1
caf9095806ba07189ef110c451254cb52b2bc43d

SHA256
559db29a676c90bbd5c1f5915fbb951cc51682babac966962df9e1a0c763a21c

SHA512
bfce7731b1ab187ff6083595b47c1523eceb53d9466df5bc8fd384da419f36d963f3bd068f65cb9daa89b8022d910f061fadf36a1b79330dd96f950f1f1560c5

Download Submit
memory/3128-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/3128-25-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/3128-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4676-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/4676-1-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/4676-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

Filesize
24KB

Download
memory/4676-8-0x00000000020D0000-0x00000000020D6000-memory.dmp

Filesize
24KB

Download
memory/4676-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download