nymaim | 6502478e95ad00c37bcba9820c2e43d62d7408b583e4f97fdc81f0ca85030873

General

Target

file.exe
Size

1.9MB
MD5

f7c0326793465619ece15ae1f5809fa2
SHA1

3183245da3a06712cfd4beafe39fdde12efe3d5a
SHA256

6502478e95ad00c37bcba9820c2e43d62d7408b583e4f97fdc81f0ca85030873
SHA512

294457f7e86ca5a3448f90e2f94422a7187cc16e4a509cc57320cdc40bca69c9b604771e252a10a74ec12d77f365c9b0f31b2fe444a76f4b9ce7bd4c3c11cab1
SSDEEP

49152:0VqfC8dwexVHEcq3YzKvlTndv6nMkAgvJ4J76aS0qPh:0YfC8dZREK86nMkzEutZ

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
4416	is-MOG1S.tmp
2864	SplitFiles122.exe
4348	QaqY9Z7RSSkmCp.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-1-5-21-2971393436-602173351-1645505021-1000\Control Panel\International\Geo\Nation	SplitFiles122.exe

Loads dropped DLL 1 IoCs

pid	Process
4416	is-MOG1S.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\language\is-NPG1F.tmp	is-MOG1S.tmp
File created	C:\Program Files (x86)\Split Files\language\is-3MV6D.tmp	is-MOG1S.tmp
File created	C:\Program Files (x86)\Split Files\language\is-RVB1T.tmp	is-MOG1S.tmp
File created	C:\Program Files (x86)\Split Files\language\is-ILOO4.tmp	is-MOG1S.tmp
File created	C:\Program Files (x86)\Split Files\language\is-8VHEQ.tmp	is-MOG1S.tmp
File created	C:\Program Files (x86)\Split Files\language\is-PCCLR.tmp	is-MOG1S.tmp
File created	C:\Program Files (x86)\Split Files\is-95CHO.tmp	is-MOG1S.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-MOG1S.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-MOG1S.tmp
File created	C:\Program Files (x86)\Split Files\language\is-MI04V.tmp	is-MOG1S.tmp
File created	C:\Program Files (x86)\Split Files\language\is-J4G96.tmp	is-MOG1S.tmp
File created	C:\Program Files (x86)\Split Files\is-7SRLL.tmp	is-MOG1S.tmp
File created	C:\Program Files (x86)\Split Files\is-QUTNS.tmp	is-MOG1S.tmp
File created	C:\Program Files (x86)\Split Files\language\is-OH76G.tmp	is-MOG1S.tmp
File created	C:\Program Files (x86)\Split Files\is-MPTSD.tmp	is-MOG1S.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles122.exe	is-MOG1S.tmp
File created	C:\Program Files (x86)\Split Files\is-536Q1.tmp	is-MOG1S.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
4604	taskkill.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
2864	SplitFiles122.exe
2864	SplitFiles122.exe
2864	SplitFiles122.exe
2864	SplitFiles122.exe
2864	SplitFiles122.exe
2864	SplitFiles122.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4604	taskkill.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 3388 wrote to memory of 4416	3388	file.exe	82
PID 3388 wrote to memory of 4416	3388	file.exe	82
PID 3388 wrote to memory of 4416	3388	file.exe	82
PID 4416 wrote to memory of 2864	4416	is-MOG1S.tmp	83
PID 4416 wrote to memory of 2864	4416	is-MOG1S.tmp	83
PID 4416 wrote to memory of 2864	4416	is-MOG1S.tmp	83
PID 2864 wrote to memory of 4348	2864	SplitFiles122.exe	86
PID 2864 wrote to memory of 4348	2864	SplitFiles122.exe	86
PID 2864 wrote to memory of 4348	2864	SplitFiles122.exe	86
PID 2864 wrote to memory of 3056	2864	SplitFiles122.exe	92
PID 2864 wrote to memory of 3056	2864	SplitFiles122.exe	92
PID 2864 wrote to memory of 3056	2864	SplitFiles122.exe	92
PID 3056 wrote to memory of 4604	3056	cmd.exe	94
PID 3056 wrote to memory of 4604	3056	cmd.exe	94
PID 3056 wrote to memory of 4604	3056	cmd.exe	94

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:3388
- C:\Users\Admin\AppData\Local\Temp\is-C8K0M.tmp\is-MOG1S.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-C8K0M.tmp\is-MOG1S.tmp" /SL4 $90040 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1737205 181248
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:4416
- - C:\Program Files (x86)\Split Files\SplitFiles122.exe
    "C:\Program Files (x86)\Split Files\SplitFiles122.exe"
    3⤵
    - Executes dropped EXE
    - Checks computer location settings
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:2864
  - - C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\QaqY9Z7RSSkmCp.exe
      4⤵
      Executes dropped EXE
      PID:4348
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles122.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles122.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:3056
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles122.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:4604

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

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Downloads

C:\Program Files (x86)\Split Files\SplitFiles122.exe

Filesize
3.2MB

MD5
97e6a6a8ed286ae4eac4c0bf8bfabcbf

SHA1
7efa7b85b98a24c080346224ad835644108f0c50

SHA256
25d8467172c3bfbd25c5b3e3be6b876dd5336941e6280db445fd44f70e8e51cc

SHA512
31bf54cbb821114b999f16bc20bf23e7f06ce82e4876ade80278b5d56f801c12d0ee85733c0b095f05906317914b635a5109343354f90a81ac3a88a23c3e3cab

Download Submit
C:\Program Files (x86)\Split Files\SplitFiles122.exe

Filesize
3.2MB

MD5
97e6a6a8ed286ae4eac4c0bf8bfabcbf

SHA1
7efa7b85b98a24c080346224ad835644108f0c50

SHA256
25d8467172c3bfbd25c5b3e3be6b876dd5336941e6280db445fd44f70e8e51cc

SHA512
31bf54cbb821114b999f16bc20bf23e7f06ce82e4876ade80278b5d56f801c12d0ee85733c0b095f05906317914b635a5109343354f90a81ac3a88a23c3e3cab

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-C8K0M.tmp\is-MOG1S.tmp

Filesize
770KB

MD5
a40f6e5d65178feb9ba406771470f1e9

SHA1
1e247679ffeffd6908aa2d67e6033fec40fc46d0

SHA256
60cd72b4c6b2ce840221b05474286810bed585376a9e0c36fb63ec387284b59e

SHA512
dfafa1884102b7ef09c53820e90effea64c1b89fd06eabc0f9d6eca804def9a3798fdd51915d9dc9a632e1d1c2588a7d164e393a4aff72965aeca210673c1386

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-C8K0M.tmp\is-MOG1S.tmp

Filesize
770KB

MD5
a40f6e5d65178feb9ba406771470f1e9

SHA1
1e247679ffeffd6908aa2d67e6033fec40fc46d0

SHA256
60cd72b4c6b2ce840221b05474286810bed585376a9e0c36fb63ec387284b59e

SHA512
dfafa1884102b7ef09c53820e90effea64c1b89fd06eabc0f9d6eca804def9a3798fdd51915d9dc9a632e1d1c2588a7d164e393a4aff72965aeca210673c1386

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-LK8J3.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\QaqY9Z7RSSkmCp.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{6e1ce040-6208-11ed-b5ce-806e6f6e6963}\QaqY9Z7RSSkmCp.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/2864-142-0x0000000000400000-0x000000000152F000-memory.dmp

Filesize
17.2MB

Download
memory/2864-148-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/2864-143-0x0000000000400000-0x000000000152F000-memory.dmp

Filesize
17.2MB

Download
memory/2864-155-0x0000000000400000-0x000000000152F000-memory.dmp

Filesize
17.2MB

Download
memory/2864-144-0x0000000000400000-0x000000000152F000-memory.dmp

Filesize
17.2MB

Download
memory/2864-152-0x0000000000400000-0x000000000152F000-memory.dmp

Filesize
17.2MB

Download
memory/3388-137-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/3388-132-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download
memory/3388-156-0x0000000000400000-0x0000000000433000-memory.dmp

Filesize
204KB

Download

Analysis

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