b7c4f61681a128c3440bbdb20c507c198968f027c70c6d3843bcf951a2aa6e70

Analysis

max time kernel
149s
max time network
153s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
13/02/2024, 16:44

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General

Target

2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe
Size

86KB
MD5

5865600efc0bbf077c76db28d2f9d69f
SHA1

af311ef9eaef4730e03763a1267ee3fc5cd6ab37
SHA256

b7c4f61681a128c3440bbdb20c507c198968f027c70c6d3843bcf951a2aa6e70
SHA512

9208cfce45a1fc95e76b791e45652413edca63ecc2fc90e43fdabb2047b69b76d440ca7f4b06a71259260e28dfd95640d5a14c94d5ee06e1f34d9d7e6476b47d
SSDEEP

768:qkmnjFom/kLyMro2GtOOtEvwDpjeY10Y/YMsvlMdwPK80GQuchoIgtISGt:qkmnpomddpMOtEvwDpjJGYQbN/PKwMgK

Score

9^/10

upx

Malware Config

Signatures

Detection of CryptoLocker Variants 5 IoCs

resource	yara_rule
behavioral1/memory/2168-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/files/0x000a000000012287-11.dat	CryptoLocker_rule2
behavioral1/memory/2168-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2
behavioral1/memory/2380-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_rule2

Detection of Cryptolocker Samples 5 IoCs

resource	yara_rule
behavioral1/memory/2168-1-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/files/0x000a000000012287-11.dat	CryptoLocker_set1
behavioral1/memory/2168-15-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1
behavioral1/memory/2380-26-0x0000000000500000-0x000000000050F000-memory.dmp	CryptoLocker_set1

UPX dump on OEP (original entry point) 5 IoCs

resource	yara_rule
behavioral1/memory/2168-1-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/files/0x000a000000012287-11.dat	UPX
behavioral1/memory/2168-15-0x0000000000500000-0x000000000050F000-memory.dmp	UPX
behavioral1/memory/2380-26-0x0000000000500000-0x000000000050F000-memory.dmp	UPX

Executes dropped EXE 1 IoCs

pid	Process
2380	asih.exe

Loads dropped DLL 1 IoCs

pid	Process
2168	2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2168-1-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/files/0x000a000000012287-11.dat	upx
behavioral1/memory/2168-15-0x0000000000500000-0x000000000050F000-memory.dmp	upx
behavioral1/memory/2380-26-0x0000000000500000-0x000000000050F000-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 2168 wrote to memory of 2380	2168	2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe	28
PID 2168 wrote to memory of 2380	2168	2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe	28
PID 2168 wrote to memory of 2380	2168	2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe	28
PID 2168 wrote to memory of 2380	2168	2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe	28

C:\Users\Admin\AppData\Local\Temp\2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe
"C:\Users\Admin\AppData\Local\Temp\2024-02-13_5865600efc0bbf077c76db28d2f9d69f_cryptolocker.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2168
- C:\Users\Admin\AppData\Local\Temp\asih.exe
  "C:\Users\Admin\AppData\Local\Temp\asih.exe"
  2⤵
  - Executes dropped EXE
  PID:2380

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
86KB

MD5
48f9140ff3d272df72f82ae037ff66f6

SHA1
646f8f1c2c993f7e38c84a882c4817d663292a87

SHA256
b41fee757dd9b3c14659b06f37c1539de8904ed89688d7260b98200dfde3a817

SHA512
ff97206b173e05df6aae1415e466f94c7e5fbbaed792804f06199abe1e581d7bc2b3eb84a2b5378c9d8fd50d45638e5b0f22d52e68db13bfdfaa74d5ca966072

Download Submit
memory/2168-1-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2168-0-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2168-2-0x0000000000280000-0x0000000000286000-memory.dmp

Filesize
24KB

Download
memory/2168-5-0x00000000001D0000-0x00000000001D6000-memory.dmp

Filesize
24KB

Download
memory/2168-15-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2380-17-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download
memory/2380-19-0x0000000000320000-0x0000000000326000-memory.dmp

Filesize
24KB

Download
memory/2380-18-0x0000000000350000-0x0000000000356000-memory.dmp

Filesize
24KB

Download
memory/2380-26-0x0000000000500000-0x000000000050F000-memory.dmp

Filesize
60KB

Download