nymaim | e028ab3888d547deb1fc53fabd694a15d735f28bf68ac36b23d67ae9d2bb25d6

General

Target

file.exe
Size

1.8MB
MD5

d9be361b1f8bb4936005a74914fbe6f5
SHA1

f537cd6a48c521499193c8278e1f84fc3f8ac9f7
SHA256

e028ab3888d547deb1fc53fabd694a15d735f28bf68ac36b23d67ae9d2bb25d6
SHA512

124ea8ab60b5d34de7694ff67483f78f3161fa9efd62cda6a07832c84a39498567a23884a65f4f321ac29d0f28957db55b1c50c300ee44c67de2009cede21de6
SSDEEP

49152:Aixz0zjpivo4sD1FcflzKv1sBUpwci8Ptk4VRAlNpi:AixSiQFDbccdsBeVtao

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

NyMaim
NyMaim is a malware with various capabilities written in C++ and first seen in 2013.
trojan nymaim

Executes dropped EXE 3 IoCs

pid	Process
2124	is-T8QOI.tmp
4568	PlitFiles132.exe
5092	YPYVpixJTqc6j.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	PlitFiles132.exe

Loads dropped DLL 1 IoCs

pid	Process
2124	is-T8QOI.tmp

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 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Split Files\is-JBG5A.tmp	is-T8QOI.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-T8QOI.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-T8QOI.tmp
File created	C:\Program Files (x86)\Split Files\is-O4QNQ.tmp	is-T8QOI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-FIPNG.tmp	is-T8QOI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-U471O.tmp	is-T8QOI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-1U6OA.tmp	is-T8QOI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-LMJM2.tmp	is-T8QOI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-DCJ1F.tmp	is-T8QOI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-SPHET.tmp	is-T8QOI.tmp
File created	C:\Program Files (x86)\Split Files\is-TIVI7.tmp	is-T8QOI.tmp
File created	C:\Program Files (x86)\Split Files\is-4V3A1.tmp	is-T8QOI.tmp
File created	C:\Program Files (x86)\Split Files\is-H2LH8.tmp	is-T8QOI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-230AD.tmp	is-T8QOI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-VEF4V.tmp	is-T8QOI.tmp
File created	C:\Program Files (x86)\Split Files\language\is-0TM8N.tmp	is-T8QOI.tmp
File opened for modification	C:\Program Files (x86)\Split Files\PlitFiles132.exe	is-T8QOI.tmp

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

System Information Discovery
T1082

Kills process with taskkill 1 IoCs

evasion

pid	Process
872	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
4568	PlitFiles132.exe
4568	PlitFiles132.exe
4568	PlitFiles132.exe
4568	PlitFiles132.exe
4568	PlitFiles132.exe
4568	PlitFiles132.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	872	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 4820 wrote to memory of 2124	4820	file.exe	81
PID 4820 wrote to memory of 2124	4820	file.exe	81
PID 4820 wrote to memory of 2124	4820	file.exe	81
PID 2124 wrote to memory of 4568	2124	is-T8QOI.tmp	82
PID 2124 wrote to memory of 4568	2124	is-T8QOI.tmp	82
PID 2124 wrote to memory of 4568	2124	is-T8QOI.tmp	82
PID 4568 wrote to memory of 5092	4568	PlitFiles132.exe	83
PID 4568 wrote to memory of 5092	4568	PlitFiles132.exe	83
PID 4568 wrote to memory of 5092	4568	PlitFiles132.exe	83
PID 4568 wrote to memory of 440	4568	PlitFiles132.exe	91
PID 4568 wrote to memory of 440	4568	PlitFiles132.exe	91
PID 4568 wrote to memory of 440	4568	PlitFiles132.exe	91
PID 440 wrote to memory of 872	440	cmd.exe	93
PID 440 wrote to memory of 872	440	cmd.exe	93
PID 440 wrote to memory of 872	440	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4820
- C:\Users\Admin\AppData\Local\Temp\is-KHF8V.tmp\is-T8QOI.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-KHF8V.tmp\is-T8QOI.tmp" /SL4 $701F8 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1609505 96768
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:2124
- - C:\Program Files (x86)\Split Files\PlitFiles132.exe
    "C:\Program Files (x86)\Split Files\PlitFiles132.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:4568
  - - C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\YPYVpixJTqc6j.exe
      4⤵
      Executes dropped EXE
      PID:5092
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PlitFiles132.exe" /f & erase "C:\Program Files (x86)\Split Files\PlitFiles132.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:440
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PlitFiles132.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:872

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Program Files (x86)\Split Files\PlitFiles132.exe

Filesize
3.1MB

MD5
33cfcce0a158901607d20a5a3e8b8f03

SHA1
1d24ceb8c75c1818a484c60b39e26293c9bf2ff4

SHA256
53aaa6ae501fdeea6a00f9a5a15a7f36e9b6b0158cde2c703c11240a4e02b52a

SHA512
c33fce3b85fc55db17ce37e1004348a99400fb5811605598f7f25a6fd07c0fdc2905c9c90c5e38c762adeadb0f71dd8ade5b91c5340649b0ec6ee7ff7c543100

Download Submit
C:\Program Files (x86)\Split Files\PlitFiles132.exe

Filesize
3.1MB

MD5
33cfcce0a158901607d20a5a3e8b8f03

SHA1
1d24ceb8c75c1818a484c60b39e26293c9bf2ff4

SHA256
53aaa6ae501fdeea6a00f9a5a15a7f36e9b6b0158cde2c703c11240a4e02b52a

SHA512
c33fce3b85fc55db17ce37e1004348a99400fb5811605598f7f25a6fd07c0fdc2905c9c90c5e38c762adeadb0f71dd8ade5b91c5340649b0ec6ee7ff7c543100

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-KHF8V.tmp\is-T8QOI.tmp

Filesize
688KB

MD5
825e351a0f8f4c0765f2362966ac3122

SHA1
b7776ed8bd5cb15d6f6a12805de3394012b3f8c1

SHA256
d55e786215fe7ec096087dbf7a3558397768ad50f0182f474d2a3ce6ed772405

SHA512
775613f17bdfa13bfb99660f517d7b1fdd31acc268304a184fc86cc339c987e2d020c313a685c22fb406422137ffc4c999b7988951ade37c2990b898b0fb9f43

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-KHF8V.tmp\is-T8QOI.tmp

Filesize
688KB

MD5
825e351a0f8f4c0765f2362966ac3122

SHA1
b7776ed8bd5cb15d6f6a12805de3394012b3f8c1

SHA256
d55e786215fe7ec096087dbf7a3558397768ad50f0182f474d2a3ce6ed772405

SHA512
775613f17bdfa13bfb99660f517d7b1fdd31acc268304a184fc86cc339c987e2d020c313a685c22fb406422137ffc4c999b7988951ade37c2990b898b0fb9f43

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-RDO2P.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\YPYVpixJTqc6j.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{cd0d74c0-1ab4-11ed-b686-806e6f6e6963}\YPYVpixJTqc6j.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/4568-142-0x0000000000400000-0x0000000001514000-memory.dmp

Filesize
17.1MB

Download
memory/4568-144-0x0000000000400000-0x0000000001514000-memory.dmp

Filesize
17.1MB

Download
memory/4568-143-0x0000000000400000-0x0000000001514000-memory.dmp

Filesize
17.1MB

Download
memory/4568-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/4568-152-0x0000000000400000-0x0000000001514000-memory.dmp

Filesize
17.1MB

Download
memory/4568-155-0x0000000000400000-0x0000000001514000-memory.dmp

Filesize
17.1MB

Download
memory/4820-132-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4820-137-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/4820-156-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing