3d5957a9a07b90b19b1c0894b189dd3df462376cdb4ab2de44a5a0e90714ee06

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
13/02/2024, 13:09

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General

Target

2024-02-13_c71e20157ea9e55b545fbbbbc2369242_cryptolocker.exe
Size

80KB
MD5

c71e20157ea9e55b545fbbbbc2369242
SHA1

17e02c83bd9e7c629b16cfb486417d29d46cb2c0
SHA256

3d5957a9a07b90b19b1c0894b189dd3df462376cdb4ab2de44a5a0e90714ee06
SHA512

90026d64bdf22dff3549570d46433b8678a02f309a73822185d1676b4a5a52dda8a66be5fa8ce4f54bd791d34b5d97d36fef6ac1e31553a0387f792ef4837bed
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBd0Z:T6a+rdOOtEvwDpjNtS

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0007000000023213-13.dat	CryptoLocker_rule2
behavioral2/memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2920-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0007000000023213-13.dat	CryptoLocker_set1
behavioral2/memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2920-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0007000000023213-13.dat	UPX
behavioral2/memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2920-26-0x0000000000500000-0x0000000000510000-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-1-5-21-3336304223-2978740688-3645194410-1000\Control Panel\International\Geo\Nation	2024-02-13_c71e20157ea9e55b545fbbbbc2369242_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2920	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0007000000023213-13.dat	upx
behavioral2/memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2920-26-0x0000000000500000-0x0000000000510000-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 116 wrote to memory of 2920	116	2024-02-13_c71e20157ea9e55b545fbbbbc2369242_cryptolocker.exe	84
PID 116 wrote to memory of 2920	116	2024-02-13_c71e20157ea9e55b545fbbbbc2369242_cryptolocker.exe	84
PID 116 wrote to memory of 2920	116	2024-02-13_c71e20157ea9e55b545fbbbbc2369242_cryptolocker.exe	84

C:\Users\Admin\AppData\Local\Temp\2024-02-13_c71e20157ea9e55b545fbbbbc2369242_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-13_c71e20157ea9e55b545fbbbbc2369242_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:116
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2920

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
80KB

MD5
35504288d12430f38676f5cc594769b9

SHA1
56644e9d5b96a19f983e5bad97898b9c34c77235

SHA256
556d9037b6c7b3ca13a990b8b6c8182497d3dae218f973dfa775e6d0723c1090

SHA512
ba9dca9f6d16f30a11cf0c1fd36ec28bc90dd5ca6708b8f1d3198bab32099995628afa3c00e207bf81e33811a0ec6c796253229bff9aafc755a3781611801917

Download Submit
memory/116-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/116-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/116-2-0x00000000021D0000-0x00000000021D6000-memory.dmp

Filesize
24KB

Download
memory/116-3-0x00000000006B0000-0x00000000006B6000-memory.dmp

Filesize
24KB

Download
memory/116-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2920-19-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2920-21-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2920-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download