83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9

Analysis

max time kernel
149s
max time network
154s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
05/10/2024, 23:30

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General

Target

83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe
Size

55KB
MD5

b517822aff15eafcf704dda1cd11fa7b
SHA1

ac9260db25f10ae2a1b5982e5bd5d7c2675ba702
SHA256

83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9
SHA512

fd05862a546995d8cc78839d2b3e0ddc386a7117da71e9d5c3203f84f4ae063b60bfbf5a302eb42c4206a290bc97b0e88819dfd3d125af214ab70bd146978ceb
SSDEEP

768:bco/2n1TCraU6GD1P2wZEjbhxnbcuyD7U9kXDn62tH/1/LpPFP8w:b7/y28wZEjbnouy8G76iH/NLpB

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
2736	rewok.exe

Loads dropped DLL 1 IoCs

pid	Process
2908	83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe

UPX packed file 2 IoCs

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

upx

resource	yara_rule
behavioral1/memory/2908-0-0x0000000000400000-0x000000000040E000-memory.dmp	upx
behavioral1/files/0x0009000000012255-11.dat	upx

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rewok.exe

Suspicious use of UnmapMainImage 2 IoCs

pid	Process
2908	83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe
2736	rewok.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 2908 wrote to memory of 2736	2908	83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe	30
PID 2908 wrote to memory of 2736	2908	83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe	30
PID 2908 wrote to memory of 2736	2908	83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe	30
PID 2908 wrote to memory of 2736	2908	83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe	30

C:\Users\Admin\AppData\Local\Temp\83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe
"C:\Users\Admin\AppData\Local\Temp\83e4cecc5d542a8716e546d43c96eeb533633c275f63df9d7f6647d1160634f9.exe"
1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of UnmapMainImage
- Suspicious use of WriteProcessMemory
PID:2908
- C:\Users\Admin\AppData\Local\Temp\rewok.exe
  "C:\Users\Admin\AppData\Local\Temp\rewok.exe"
  2⤵
  - Executes dropped EXE
  - System Location Discovery: System Language Discovery
  - Suspicious use of UnmapMainImage
  PID:2736

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

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

Filesize
55KB

MD5
edeb5cb3d0092e67f02006d20478c555

SHA1
3586d2c03004e5e7de7b1a27203f325c31b63d06

SHA256
227771a5f91471aeec82893c4c8f0a743d77adf541f17708a83cca1ee73d08b3

SHA512
aa1fc907d9d8367c6168891bbb6a4748799566aae4e192e7c06d87117cab0642af51590157d0b273fb04032bd9290c24856393da13715d9c95024490a6ff4a9b

Download Submit
memory/2736-25-0x0000000000360000-0x0000000000366000-memory.dmp

Filesize
24KB

Download
memory/2908-0-0x0000000000400000-0x000000000040E000-memory.dmp

Filesize
56KB

Download
memory/2908-1-0x00000000002E0000-0x00000000002E6000-memory.dmp

Filesize
24KB

Download
memory/2908-2-0x0000000000400000-0x0000000000406000-memory.dmp

Filesize
24KB

Download
memory/2908-9-0x00000000002E0000-0x00000000002E6000-memory.dmp

Filesize
24KB

Download
memory/2908-14-0x0000000001DE0000-0x0000000001DEE000-memory.dmp

Filesize
56KB

Download