57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef

Analysis

max time kernel
180s
max time network
193s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
07-11-2022 12:59

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General

Target

57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef.exe
Size

13KB
MD5

057d1c294370d0131f6aa433a5d95556
SHA1

ad60e3f6f535c153f758e381270209ef8357e25f
SHA256

57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef
SHA512

4bee8ac538c6b3a29b20ffe9ebe78e6ffcc31ca20ce8ce2d007d0a2eb38d90d4a31a36131636a9a3ac93d1c53f23d79856c87d0936dda6c8e0f0b6d279897610
SSDEEP

384:mXOJ8NjyTtL9BSScJTvkBNlcNe3jWelKdF:mXDjAtL3qJb+bcszJKd

Score

8^/10

persistence upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
3036	rexljehk.exe

Modifies AppInit DLL entries 2 TTPs
persistence

Registry Run Keys / Startup Folder
T1060

Modify Registry
T1112

UPX packed file 5 IoCs

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

upx

resource	yara_rule
behavioral2/memory/2040-132-0x0000000000400000-0x0000000000410000-memory.dmp	upx
behavioral2/files/0x0006000000022e3b-134.dat	upx
behavioral2/files/0x0006000000022e3b-135.dat	upx
behavioral2/memory/3036-136-0x0000000000400000-0x0000000000410000-memory.dmp	upx
behavioral2/memory/2040-137-0x0000000000400000-0x0000000000410000-memory.dmp	upx

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rexljeh.dll	57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef.exe
File created	C:\Windows\SysWOW64\rexljehk.exe	57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef.exe
File opened for modification	C:\Windows\SysWOW64\rexljehk.exe	57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2040 wrote to memory of 3036	2040	57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef.exe	80
PID 2040 wrote to memory of 3036	2040	57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef.exe	80
PID 2040 wrote to memory of 3036	2040	57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef.exe	80
PID 2040 wrote to memory of 5092	2040	57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef.exe	81
PID 2040 wrote to memory of 5092	2040	57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef.exe	81
PID 2040 wrote to memory of 5092	2040	57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef.exe	81

C:\Users\Admin\AppData\Local\Temp\57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef.exe
"C:\Users\Admin\AppData\Local\Temp\57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2040
- C:\Windows\SysWOW64\rexljehk.exe
  C:\Windows\system32\rexljehk.exe ˜‰
  2⤵
  - Executes dropped EXE
  PID:3036
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef.exe.bat
  2⤵
  PID:5092

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef.exe.bat

Filesize
246B

MD5
fce9e00e8cf4b5f0fcf036e6202d7b27

SHA1
009b91491dd2c3b577ac338f1a6033fed6166e63

SHA256
0171d4183a0614524641a1c9f25d1d42ce4ef499112adbf13c15d69033317f6a

SHA512
dbf31356a97e1b72234936e517aea3e43d094e3534e8d3c9b0a0773ce7490f2f455ee35b368d88788c4552289b990dac043625819ff8e63af23a2f36b2cff8d1

Download Submit
C:\Windows\SysWOW64\rexljehk.exe

Filesize
13KB

MD5
057d1c294370d0131f6aa433a5d95556

SHA1
ad60e3f6f535c153f758e381270209ef8357e25f

SHA256
57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef

SHA512
4bee8ac538c6b3a29b20ffe9ebe78e6ffcc31ca20ce8ce2d007d0a2eb38d90d4a31a36131636a9a3ac93d1c53f23d79856c87d0936dda6c8e0f0b6d279897610

Download Submit
C:\Windows\SysWOW64\rexljehk.exe

Filesize
13KB

MD5
057d1c294370d0131f6aa433a5d95556

SHA1
ad60e3f6f535c153f758e381270209ef8357e25f

SHA256
57606936ffe69809bb6a897a55a4fd8489c7e39630db1be24d686a3ccc37a9ef

SHA512
4bee8ac538c6b3a29b20ffe9ebe78e6ffcc31ca20ce8ce2d007d0a2eb38d90d4a31a36131636a9a3ac93d1c53f23d79856c87d0936dda6c8e0f0b6d279897610

Download Submit
memory/2040-132-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/2040-137-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/3036-133-0x0000000000000000-mapping.dmp

Download
memory/3036-136-0x0000000000400000-0x0000000000410000-memory.dmp

Filesize
64KB

Download
memory/5092-138-0x0000000000000000-mapping.dmp

Download