f68a0aa7625616b0e5d55f92dd68c55a7527289e2d2f1c8998a62b91281e6755

General

Target

2024-01-25_f99d0c28e52597958c35ecd0ec00f55a_cryptolocker.exe
Size

75KB
MD5

f99d0c28e52597958c35ecd0ec00f55a
SHA1

d61f6c25c65acea065a6d2f88dc83e16384177da
SHA256

f68a0aa7625616b0e5d55f92dd68c55a7527289e2d2f1c8998a62b91281e6755
SHA512

e8ccfdfd8dbe02e82408ea760ecc61f3d6eb100b101ab0c0bca5585ca95702e6ff6de1d1703d7c98c7f990a1051d7b56278e14dc0830dd2d53dc482e4ac78149
SSDEEP

1536:T6QFElP6n+gxmddpMOtEvwDpjwaxTNUOAkXtBde:T6a+rdOOtEvwDpjNtE

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2104-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_rule2
behavioral1/memory/2104-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2148-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2148-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2104-0-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
\Users\Admin\AppData\Local\Temp\asih.exe	CryptoLocker_set1
behavioral1/memory/2104-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2148-18-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2148-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

Processes:

resource	yara_rule
behavioral1/memory/2104-0-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
\Users\Admin\AppData\Local\Temp\asih.exe	UPX
behavioral1/memory/2104-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2148-18-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2148-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

Processes:

asih.exe

pid process

2148 asih.exe
Loads dropped DLL 1 IoCs

Processes:

2024-01-25_f99d0c28e52597958c35ecd0ec00f55a_cryptolocker.exe

pid process

2104 2024-01-25_f99d0c28e52597958c35ecd0ec00f55a_cryptolocker.exe

pid	process
2148	asih.exe

pid	process
2104	2024-01-25_f99d0c28e52597958c35ecd0ec00f55a_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

Processes:

resource	yara_rule
behavioral1/memory/2104-0-0x0000000000500000-0x0000000000510000-memory.dmp	upx
\Users\Admin\AppData\Local\Temp\asih.exe	upx
behavioral1/memory/2104-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2148-18-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2148-27-0x0000000000500000-0x0000000000510000-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 4 IoCs

Processes:

2024-01-25_f99d0c28e52597958c35ecd0ec00f55a_cryptolocker.exe

description	pid	process	target process
PID 2104 wrote to memory of 2148	2104	2024-01-25_f99d0c28e52597958c35ecd0ec00f55a_cryptolocker.exe	asih.exe
PID 2104 wrote to memory of 2148	2104	2024-01-25_f99d0c28e52597958c35ecd0ec00f55a_cryptolocker.exe	asih.exe
PID 2104 wrote to memory of 2148	2104	2024-01-25_f99d0c28e52597958c35ecd0ec00f55a_cryptolocker.exe	asih.exe
PID 2104 wrote to memory of 2148	2104	2024-01-25_f99d0c28e52597958c35ecd0ec00f55a_cryptolocker.exe	asih.exe

C:\Users\Admin\AppData\Local\Temp\2024-01-25_f99d0c28e52597958c35ecd0ec00f55a_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-01-25_f99d0c28e52597958c35ecd0ec00f55a_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2104

C:\Users\Admin\AppData\Local\Temp\asih.exe
"C:\Users\Admin\AppData\Local\Temp\asih.exe"
2⤵
- Executes dropped EXE
PID:2148

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe
Filesize
75KB

MD5
dc76bcb3ea4800bfb06836f258658a65

SHA1
158ad52eb5e57f969e042680fbb96ddf6111a2ac

SHA256
fdc60d78ceadf189d986538af8340c561c512704d670628c48b9a82834bc9944

SHA512
d222db3565e508beb8dcc8999210f7d2d989f734bdddd119301d7272b6ecf39505fcf7533600063f1239f8000ab16921fba7f9d79c3e9dac3df01c636d164b7e

Download Submit
memory/2104-0-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2104-1-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2104-2-0x0000000000370000-0x0000000000376000-memory.dmp

Filesize
24KB

Download
memory/2104-5-0x00000000002C0000-0x00000000002C6000-memory.dmp

Filesize
24KB

Download
memory/2104-16-0x00000000004E0000-0x00000000004F0000-memory.dmp

Filesize
64KB

Download
memory/2104-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2104-26-0x00000000004E0000-0x00000000004F0000-memory.dmp

Filesize
64KB

Download
memory/2148-18-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2148-19-0x0000000000600000-0x0000000000606000-memory.dmp

Filesize
24KB

Download
memory/2148-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads