e2db5962c090f83563dbad249a2797a1a3c7c4def3a5abd1ab701e73572078bf

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
13/05/2024, 22:21

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General

Target

2024-05-13_1fe36e1e8674453c24f81a73f02aadd1_cryptolocker.exe
Size

39KB
MD5

1fe36e1e8674453c24f81a73f02aadd1
SHA1

efed0f1ac0db7780aa65725bee50ad0d9070a67c
SHA256

e2db5962c090f83563dbad249a2797a1a3c7c4def3a5abd1ab701e73572078bf
SHA512

7210f51e52fa87973122971da15e861dcd8f3aee3ad4d31f5c038c2170d6a4f550f31c9060bb68a8b02b2dcf25c147df1a6ee8f3f50736bdfddb2a307b30d69a
SSDEEP

768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITY9S:qDdFJy3QMOtEvwDpjjWMl7TJ

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 4 IoCs

resource	yara_rule
behavioral2/memory/2500-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/files/0x0008000000023444-13.dat	CryptoLocker_rule2
behavioral2/memory/2500-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral2/memory/2924-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 4 IoCs

resource	yara_rule
behavioral2/memory/2500-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/files/0x0008000000023444-13.dat	CryptoLocker_set1
behavioral2/memory/2500-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral2/memory/2924-26-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 4 IoCs

resource	yara_rule
behavioral2/memory/2500-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/files/0x0008000000023444-13.dat	UPX
behavioral2/memory/2500-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral2/memory/2924-26-0x0000000000500000-0x0000000000510000-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-1-5-21-711569230-3659488422-571408806-1000\Control Panel\International\Geo\Nation	2024-05-13_1fe36e1e8674453c24f81a73f02aadd1_cryptolocker.exe

Executes dropped EXE 1 IoCs

pid	Process
2924	asih.exe

UPX packed file 4 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2500-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/files/0x0008000000023444-13.dat	upx
behavioral2/memory/2500-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral2/memory/2924-26-0x0000000000500000-0x0000000000510000-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 2500 wrote to memory of 2924	2500	2024-05-13_1fe36e1e8674453c24f81a73f02aadd1_cryptolocker.exe	86
PID 2500 wrote to memory of 2924	2500	2024-05-13_1fe36e1e8674453c24f81a73f02aadd1_cryptolocker.exe	86
PID 2500 wrote to memory of 2924	2500	2024-05-13_1fe36e1e8674453c24f81a73f02aadd1_cryptolocker.exe	86

C:\Users\Admin\AppData\Local\Temp\2024-05-13_1fe36e1e8674453c24f81a73f02aadd1_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-05-13_1fe36e1e8674453c24f81a73f02aadd1_cryptolocker.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2500
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2924

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
39KB

MD5
6a20c20bfb30e9a48d59c3fb55c43a4a

SHA1
48d07c4ea0a03a6cd1cd548d7dc15e24099ec7f6

SHA256
1f4f43935dc0db6399f6c44a6824854dedeadf06ad4d8a24a607ffe5544730ea

SHA512
089a0300e824fd96fc512c8b57cf07643ff021bebc6d1ad9c5cf616dd687147f90e66d68dd080824595bbd59b2c759872ebc3a980f3bbef691c1208c3990e11f

Download Submit
memory/2500-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2500-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2500-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

Filesize
24KB

Download
memory/2500-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

Filesize
24KB

Download
memory/2500-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2924-19-0x00000000005C0000-0x00000000005C6000-memory.dmp

Filesize
24KB

Download
memory/2924-25-0x00000000005A0000-0x00000000005A6000-memory.dmp

Filesize
24KB

Download
memory/2924-26-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download