d016fcbdb988d56df4c26d75a12e87a61010ed2366b52eefb8b409a1d8bcbaab

General

Target

RustExternal_nls..scr
Size

658KB
MD5

556084cf64aec63e0babdf10a61afaa6
SHA1

b7fa21295db0657d1767c05bb440b218cecdf521
SHA256

d016fcbdb988d56df4c26d75a12e87a61010ed2366b52eefb8b409a1d8bcbaab
SHA512

6c896594ea47228f71f1dea7d9fd9f9842b5f178748a39c785ded34fb9dfd574c9bd781f1f65176e436453257078255803d729b79d823c01c6629fddfb3ce33e
SSDEEP

12288:LC/74rdbHgVBnqvFprkrUolVATWZXYm7ljg9hG80NEKXo1Y1UHC+O:LC/UGTWrkrUovUKfhkQNEwUnO

Score

8^/10

upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

Processes:

HJDS32.EXE

pid process

1760 HJDS32.EXE

pid	process
1760	HJDS32.EXE

UPX packed file 9 IoCs

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

upx

Processes:

resource	yara_rule
\Users\Admin\AppData\Roaming\HJDS32.EXE	upx
\Users\Admin\AppData\Roaming\HJDS32.EXE	upx
C:\Users\Admin\AppData\Roaming\HJDS32.EXE	upx
behavioral1/memory/1760-77-0x000000013FE80000-0x000000013FFDF000-memory.dmp	upx
\Users\Admin\AppData\Roaming\HJDS32.EXE	upx
\Users\Admin\AppData\Roaming\HJDS32.EXE	upx
\Users\Admin\AppData\Roaming\HJDS32.EXE	upx
\Users\Admin\AppData\Roaming\HJDS32.EXE	upx
behavioral1/memory/1760-83-0x000000013FE80000-0x000000013FFDF000-memory.dmp	upx

Loads dropped DLL 6 IoCs

Processes:

RegAsm.exeWerFault.exe

pid process

2020 RegAsm.exe
2020 RegAsm.exe
1876 WerFault.exe
1876 WerFault.exe
1876 WerFault.exe
1876 WerFault.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

RustExternal_nls..scr

description pid process target process

PID 2004 set thread context of 2020 2004 RustExternal_nls..scr RegAsm.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1876 1760 WerFault.exe HJDS32.EXE
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

RustExternal_nls..scr

pid process

2004 RustExternal_nls..scr
2004 RustExternal_nls..scr
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RustExternal_nls..scr

description pid process

Token: SeDebugPrivilege 2004 RustExternal_nls..scr

pid	process
2020	RegAsm.exe
2020	RegAsm.exe
1876	WerFault.exe
1876	WerFault.exe
1876	WerFault.exe
1876	WerFault.exe

description	pid	process	target process
PID 2004 set thread context of 2020	2004	RustExternal_nls..scr	RegAsm.exe

pid	pid_target	process	target process
1876	1760	WerFault.exe	HJDS32.EXE

pid	process
2004	RustExternal_nls..scr
2004	RustExternal_nls..scr

description	pid	process
Token: SeDebugPrivilege	2004	RustExternal_nls..scr

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

RustExternal_nls..scrRegAsm.exeHJDS32.EXE

description	pid	process	target process
PID 2004 wrote to memory of 1968	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 1968	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 1968	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 1968	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 1968	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 1968	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 1968	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 1992	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 1992	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 1992	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 1992	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 1992	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 1992	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 1992	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 2020	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 2020	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 2020	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 2020	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 2020	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 2020	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 2020	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 2020	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 2020	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 2020	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 2020	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 2020	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 2020	2004	RustExternal_nls..scr	RegAsm.exe
PID 2004 wrote to memory of 2020	2004	RustExternal_nls..scr	RegAsm.exe
PID 2020 wrote to memory of 1760	2020	RegAsm.exe	HJDS32.EXE
PID 2020 wrote to memory of 1760	2020	RegAsm.exe	HJDS32.EXE
PID 2020 wrote to memory of 1760	2020	RegAsm.exe	HJDS32.EXE
PID 2020 wrote to memory of 1760	2020	RegAsm.exe	HJDS32.EXE
PID 1760 wrote to memory of 1876	1760	HJDS32.EXE	WerFault.exe
PID 1760 wrote to memory of 1876	1760	HJDS32.EXE	WerFault.exe
PID 1760 wrote to memory of 1876	1760	HJDS32.EXE	WerFault.exe

C:\Users\Admin\AppData\Local\Temp\RustExternal_nls..scr
"C:\Users\Admin\AppData\Local\Temp\RustExternal_nls..scr" /S
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2004

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
#cmd
2⤵
PID:1968

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
#cmd
2⤵
PID:1992

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
#cmd
2⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2020

C:\Users\Admin\AppData\Roaming\HJDS32.EXE
"C:\Users\Admin\AppData\Roaming\HJDS32.EXE"
3⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
PID:1760

C:\Windows\system32\WerFault.exe
C:\Windows\system32\WerFault.exe -u -p 1760 -s 284
4⤵
- Loads dropped DLL
- Program crash
PID:1876

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Roaming\HJDS32.EXE
Filesize
532KB

MD5
89d77a6e1e3a08f6cbb5b440c8f47e29

SHA1
b9f2db35241435b4ceed98b58b63918a6f4ce2e2

SHA256
9f6badc3fdae2eec00ce41e5c07ccaef97eb9805d13328a1589e36fd1890181c

SHA512
c6102fd3cc8438292a222583f40358e2039fab534765ed2f07e056df36c8f609ef51b55c782baaeeb1d2124b3aed5ebfbb9875dc136e560220a8339393c594e2

Download Submit
\Users\Admin\AppData\Roaming\HJDS32.EXE
Filesize
532KB

MD5
89d77a6e1e3a08f6cbb5b440c8f47e29

SHA1
b9f2db35241435b4ceed98b58b63918a6f4ce2e2

SHA256
9f6badc3fdae2eec00ce41e5c07ccaef97eb9805d13328a1589e36fd1890181c

SHA512
c6102fd3cc8438292a222583f40358e2039fab534765ed2f07e056df36c8f609ef51b55c782baaeeb1d2124b3aed5ebfbb9875dc136e560220a8339393c594e2

Download Submit
\Users\Admin\AppData\Roaming\HJDS32.EXE
Filesize
532KB

MD5
89d77a6e1e3a08f6cbb5b440c8f47e29

SHA1
b9f2db35241435b4ceed98b58b63918a6f4ce2e2

SHA256
9f6badc3fdae2eec00ce41e5c07ccaef97eb9805d13328a1589e36fd1890181c

SHA512
c6102fd3cc8438292a222583f40358e2039fab534765ed2f07e056df36c8f609ef51b55c782baaeeb1d2124b3aed5ebfbb9875dc136e560220a8339393c594e2

Download Submit
\Users\Admin\AppData\Roaming\HJDS32.EXE
Filesize
532KB

MD5
89d77a6e1e3a08f6cbb5b440c8f47e29

SHA1
b9f2db35241435b4ceed98b58b63918a6f4ce2e2

SHA256
9f6badc3fdae2eec00ce41e5c07ccaef97eb9805d13328a1589e36fd1890181c

SHA512
c6102fd3cc8438292a222583f40358e2039fab534765ed2f07e056df36c8f609ef51b55c782baaeeb1d2124b3aed5ebfbb9875dc136e560220a8339393c594e2

Download Submit
\Users\Admin\AppData\Roaming\HJDS32.EXE
Filesize
532KB

MD5
89d77a6e1e3a08f6cbb5b440c8f47e29

SHA1
b9f2db35241435b4ceed98b58b63918a6f4ce2e2

SHA256
9f6badc3fdae2eec00ce41e5c07ccaef97eb9805d13328a1589e36fd1890181c

SHA512
c6102fd3cc8438292a222583f40358e2039fab534765ed2f07e056df36c8f609ef51b55c782baaeeb1d2124b3aed5ebfbb9875dc136e560220a8339393c594e2

Download Submit
\Users\Admin\AppData\Roaming\HJDS32.EXE
Filesize
532KB

MD5
89d77a6e1e3a08f6cbb5b440c8f47e29

SHA1
b9f2db35241435b4ceed98b58b63918a6f4ce2e2

SHA256
9f6badc3fdae2eec00ce41e5c07ccaef97eb9805d13328a1589e36fd1890181c

SHA512
c6102fd3cc8438292a222583f40358e2039fab534765ed2f07e056df36c8f609ef51b55c782baaeeb1d2124b3aed5ebfbb9875dc136e560220a8339393c594e2

Download Submit
\Users\Admin\AppData\Roaming\HJDS32.EXE
Filesize
532KB

MD5
89d77a6e1e3a08f6cbb5b440c8f47e29

SHA1
b9f2db35241435b4ceed98b58b63918a6f4ce2e2

SHA256
9f6badc3fdae2eec00ce41e5c07ccaef97eb9805d13328a1589e36fd1890181c

SHA512
c6102fd3cc8438292a222583f40358e2039fab534765ed2f07e056df36c8f609ef51b55c782baaeeb1d2124b3aed5ebfbb9875dc136e560220a8339393c594e2

Download Submit
memory/1760-74-0x0000000000000000-mapping.dmp

Download
memory/1760-77-0x000000013FE80000-0x000000013FFDF000-memory.dmp

Filesize
1.4MB

Download
memory/1760-83-0x000000013FE80000-0x000000013FFDF000-memory.dmp

Filesize
1.4MB

Download
memory/1876-78-0x0000000000000000-mapping.dmp

Download
memory/2004-54-0x00000000001A0000-0x000000000024A000-memory.dmp

Filesize
680KB

Download
memory/2004-55-0x00000000764D1000-0x00000000764D3000-memory.dmp

Filesize
8KB

Download
memory/2020-70-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/2020-67-0x0000000000403248-mapping.dmp

Download
memory/2020-76-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/2020-66-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/2020-64-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/2020-62-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/2020-61-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/2020-59-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/2020-57-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download
memory/2020-56-0x0000000000400000-0x0000000000497000-memory.dmp

Filesize
604KB

Download

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