2ace60ae08128a480331085d3779254653cd0f4dc509e870a69de2fa90872c01

General

Target

2024-04-21_a2e0ee192bda03d779fee7021ff880cf_cryptolocker.exe
Size

88KB
MD5

a2e0ee192bda03d779fee7021ff880cf
SHA1

b213f9caff64457ac4fb090fccecc09d7284424c
SHA256

2ace60ae08128a480331085d3779254653cd0f4dc509e870a69de2fa90872c01
SHA512

e0e953605d9c2f44f312bc58c25f58f6259f37b4e74c7ca7c0a69dae67ffd39f6450e23f2c9de5f5506375115400c711bbefe704d22364b3df20339c278f2370
SSDEEP

1536:n6QFElP6n+g9u9cvMOtEvwDpjYYTjipvF2bx1PQAq:n6a+1SEOtEvwDpjYYvQd2Pq

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 6 IoCs

resource	yara_rule
behavioral1/memory/1676-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000b000000012256-11.dat	CryptoLocker_rule2
behavioral1/memory/1676-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/1676-12-0x00000000022E0000-0x00000000022F0000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2016-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2016-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 6 IoCs

resource	yara_rule
behavioral1/memory/1676-1-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000b000000012256-11.dat	CryptoLocker_set1
behavioral1/memory/1676-15-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/1676-12-0x00000000022E0000-0x00000000022F0000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2016-17-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2016-27-0x0000000000500000-0x0000000000510000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 6 IoCs

resource	yara_rule
behavioral1/memory/1676-1-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/files/0x000b000000012256-11.dat	UPX
behavioral1/memory/1676-15-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/1676-12-0x00000000022E0000-0x00000000022F0000-memory.dmp	UPX
behavioral1/memory/2016-17-0x0000000000500000-0x0000000000510000-memory.dmp	UPX
behavioral1/memory/2016-27-0x0000000000500000-0x0000000000510000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2016	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
1676	2024-04-21_a2e0ee192bda03d779fee7021ff880cf_cryptolocker.exe

UPX packed file 6 IoCs

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

upx

resource	yara_rule
behavioral1/memory/1676-1-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/files/0x000b000000012256-11.dat	upx
behavioral1/memory/1676-15-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/1676-12-0x00000000022E0000-0x00000000022F0000-memory.dmp	upx
behavioral1/memory/2016-17-0x0000000000500000-0x0000000000510000-memory.dmp	upx
behavioral1/memory/2016-27-0x0000000000500000-0x0000000000510000-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

description	pid	Process	procid_target
PID 1676 wrote to memory of 2016	1676	2024-04-21_a2e0ee192bda03d779fee7021ff880cf_cryptolocker.exe	28
PID 1676 wrote to memory of 2016	1676	2024-04-21_a2e0ee192bda03d779fee7021ff880cf_cryptolocker.exe	28
PID 1676 wrote to memory of 2016	1676	2024-04-21_a2e0ee192bda03d779fee7021ff880cf_cryptolocker.exe	28
PID 1676 wrote to memory of 2016	1676	2024-04-21_a2e0ee192bda03d779fee7021ff880cf_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-04-21_a2e0ee192bda03d779fee7021ff880cf_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-04-21_a2e0ee192bda03d779fee7021ff880cf_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1676
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2016

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

Replay Monitor

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Downloads

\Users\Admin\AppData\Local\Temp\asih.exe

Filesize
89KB

MD5
40c32756947f8d6c9e7bfe114624ed99

SHA1
0420620099cc42d568cd25cd962da304473c77b4

SHA256
196659a1a8b4aaa1869936c100b1e16e3afeee0bd61f23238f379a124836cf2b

SHA512
25c2a1af09961bb54296bf9d8b9e95619bb234b0be17143f62c2fd4a4c18cc9143fc6b25c74516f86a0582761b16b6af8b2995c9e3e13e0879a32256fdfb4c89

Download Submit
memory/1676-2-0x0000000000350000-0x0000000000356000-memory.dmp

Filesize
24KB

Download
memory/1676-1-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1676-0-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/1676-3-0x0000000000250000-0x0000000000256000-memory.dmp

Filesize
24KB

Download
memory/1676-15-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/1676-12-0x00000000022E0000-0x00000000022F0000-memory.dmp

Filesize
64KB

Download
memory/2016-17-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download
memory/2016-19-0x0000000000310000-0x0000000000316000-memory.dmp

Filesize
24KB

Download
memory/2016-26-0x00000000002D0000-0x00000000002D6000-memory.dmp

Filesize
24KB

Download
memory/2016-27-0x0000000000500000-0x0000000000510000-memory.dmp

Filesize
64KB

Download

Analysis

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