socks5systemz | 863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740

General

Target

863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.exe
Size

3.0MB
MD5

bf0580ea2de702cc5d64b7cb8688fac8
SHA1

bcc9d0317aecf1ec81bb83426b7b7bd53d1299f5
SHA256

863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740
SHA512

363fe567f92ee6c126eb2753a1a07fc2a6525d7a2d7ccd8735f9a134ef44d653ac4330ff0098ada4525ef1aaa861b5cac11eacb186450e54e95fb5aa8b358a4a
SSDEEP

49152:G2XiKqwyof2QSYSyBoVW6Q/gMc23xxNrx84LaWnY4hTyPNmqed7AMNiK/sI:/X08qYP6sc23LD9Y4BcNmq8jNiOd

Score

10^/10

socks5systemz botnet discovery

Malware Config

Extracted

Family

socks5systemz

Attributes

rc4_key
i4hiea56#7b&dfw3

Signatures

Detect Socks5Systemz Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4756-89-0x00000000029F0000-0x0000000002A9D000-memory.dmp	family_socks5systemz

Socks5Systemz
Socks5Systemz is a botnet written in C++.
botnet socks5systemz
Socks5systemz family
socks5systemz

Executes dropped EXE 3 IoCs

pid	Process
3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
4896	MathCRT.exe
4756	MathCRT.exe

Loads dropped DLL 3 IoCs

pid	Process
3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp

Unexpected DNS network traffic destination 1 IoCs

Network traffic to other servers than the configured DNS servers was detected on the DNS port.

description	ioc
Destination IP	81.31.197.38

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Drops file in Program Files directory 19 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Common Files\MathCRT\is-NAUDE.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\is-FIVGB.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\is-IRAUA.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\unins000.dat	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\is-BOMM9.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\is-V9345.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\is-R80U5.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File opened for modification	C:\Program Files (x86)\Common Files\MathCRT\unins000.dat	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File opened for modification	C:\Program Files (x86)\Common Files\MathCRT\MathCRT.exe	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\is-UAJCS.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\is-9Q5PB.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\is-QLP3V.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\is-L7QAC.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\UIText\is-VDTEG.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\UIText\is-8QGME.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\is-5U44N.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\is-IPVFP.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\is-25S1E.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
File created	C:\Program Files (x86)\Common Files\MathCRT\is-MKGI0.tmp	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp

System Location Discovery: System Language Discovery 1 TTPs 7 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	net1.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MathCRT.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	MathCRT.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	net.exe

Runs net.exe

Suspicious use of WriteProcessMemory 18 IoCs

description	pid	Process	procid_target
PID 2416 wrote to memory of 3176	2416	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.exe	82
PID 2416 wrote to memory of 3176	2416	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.exe	82
PID 2416 wrote to memory of 3176	2416	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.exe	82
PID 3176 wrote to memory of 4556	3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp	83
PID 3176 wrote to memory of 4556	3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp	83
PID 3176 wrote to memory of 4556	3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp	83
PID 3176 wrote to memory of 4896	3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp	85
PID 3176 wrote to memory of 4896	3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp	85
PID 3176 wrote to memory of 4896	3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp	85
PID 3176 wrote to memory of 3480	3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp	86
PID 3176 wrote to memory of 3480	3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp	86
PID 3176 wrote to memory of 3480	3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp	86
PID 3176 wrote to memory of 4756	3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp	87
PID 3176 wrote to memory of 4756	3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp	87
PID 3176 wrote to memory of 4756	3176	863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp	87
PID 3480 wrote to memory of 4000	3480	net.exe	89
PID 3480 wrote to memory of 4000	3480	net.exe	89
PID 3480 wrote to memory of 4000	3480	net.exe	89

C:\Users\Admin\AppData\Local\Temp\863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.exe
"C:\Users\Admin\AppData\Local\Temp\863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.exe"
1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2416
- C:\Users\Admin\AppData\Local\Temp\is-5M5JJ.tmp\863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-5M5JJ.tmp\863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp" /SL5="$602DC,2899550,54272,C:\Users\Admin\AppData\Local\Temp\863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3176
- - C:\Windows\SysWOW64\schtasks.exe
    "C:\Windows\system32\schtasks.exe" /Query
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4556
- - C:\Program Files (x86)\Common Files\MathCRT\MathCRT.exe
    "C:\Program Files (x86)\Common Files\MathCRT\MathCRT.exe" -i
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4896
- - C:\Windows\SysWOW64\net.exe
    "C:\Windows\system32\net.exe" helpmsg 30
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3480
  - - C:\Windows\SysWOW64\net1.exe
      C:\Windows\system32\net1 helpmsg 30
      4⤵
      System Location Discovery: System Language Discovery
      PID:4000
- - C:\Program Files (x86)\Common Files\MathCRT\MathCRT.exe
    "C:\Program Files (x86)\Common Files\MathCRT\MathCRT.exe" -s
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:4756

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Common Files\MathCRT\MathCRT.exe

Filesize
2.8MB

MD5
30ed63482f257908f95df5a3dbac782e

SHA1
94e8b6cb9e008b8d2f44c6b941547f14b85e6d1c

SHA256
129ea704169d1c09ee6cbd2fc256c6529e92eb76040a149a2775ae775bb0d00b

SHA512
6942ece7a810cf77bbda3acdf0cfa3c1346064abeb7e002d5b658db5b573ffa5cd0d0f2215dcbb7868a9b31714f24fd578740e587de5fe13ea87b9cc4ff05a3f

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-5M5JJ.tmp\863f6e84b82538cf8f71d294aa0a44a2490aac54c709d2aa3383bc778bfc7740.tmp

Filesize
694KB

MD5
5525670a9e72d77b368a9aa4b8c814c1

SHA1
3fdad952ea00175f3a6e549b5dca4f568e394612

SHA256
1180706added2a7899f08f25a9f88ecff5d003ba8964f918d00779565e4a6978

SHA512
757249f7e67f82522a8e3079a22c5cf92111626446a32ad3ef876f23885f62d1bb5bf3238d564e23531d062fe18742568dfc00e33b049bb8eef05eb953ef981a

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-ID1UQ.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-ID1UQ.tmp\_isetup\_isdecmp.dll

Filesize
32KB

MD5
b6f11a0ab7715f570f45900a1fe84732

SHA1
77b1201e535445af5ea94c1b03c0a1c34d67a77b

SHA256
e47dd306a9854599f02bc1b07ca6dfbd5220f8a1352faa9616d1a327de0bbf67

SHA512
78a757e67d21eb7cc95954df15e3eeff56113d6b40fb73f0c5f53304265cc52c79125d6f1b3655b64f9a411711b5b70f746080d708d7c222f4e65bad64b1b771

Download Submit
memory/2416-0-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2416-2-0x0000000000401000-0x000000000040B000-memory.dmp

Filesize
40KB

Download
memory/2416-70-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3176-69-0x0000000000400000-0x00000000004BD000-memory.dmp

Filesize
756KB

Download
memory/3176-10-0x0000000000400000-0x00000000004BD000-memory.dmp

Filesize
756KB

Download
memory/4756-90-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-89-0x00000000029F0000-0x0000000002A9D000-memory.dmp

Filesize
692KB

Download
memory/4756-117-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-68-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-114-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-73-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-74-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-77-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-80-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-83-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-86-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-110-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-107-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-95-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-98-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-101-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4756-104-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4896-60-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4896-61-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4896-71-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download
memory/4896-65-0x0000000000400000-0x00000000006DA000-memory.dmp

Filesize
2.9MB

Download

Analysis

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