nymaim | e1b2b4ff7fa6917070b3b7a6f0d3f0bd37cd0ccb5f16fcf8a7560aade1457ff1

Analysis

max time kernel
56s
max time network
59s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
12-01-2023 19:16

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General

Target

file.exe
Size

1.7MB
MD5

cf759e030e127c70f0667083288d6435
SHA1

12c459c95bde62a0d08526fc91f1a3c22aad8158
SHA256

e1b2b4ff7fa6917070b3b7a6f0d3f0bd37cd0ccb5f16fcf8a7560aade1457ff1
SHA512

dda3ab8c281fd1bf5b012cbc6b57215edc67948756fd914841e97e95fa3d2d31c161a0b1725e2752e95b2731e9690ed16645ca1aea17264eb4d4098cbe6733c6
SSDEEP

24576:220Sx+hGkGms8+8ZHGp6TcooVGT+mJh/QUlk/cmT3MGBongXC75ld1qSVpk:228wxaSXVGqEh/PO/NQxTd1qapk

Score

10^/10

nymaim discovery trojan

Malware Config

Extracted

Family

nymaim

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

Processes:

file.tmpMitFiles138.exeeZRtyfAm28.exe

pid process

1948 file.tmp
1228 MitFiles138.exe
1708 eZRtyfAm28.exe
Loads dropped DLL 6 IoCs

Processes:

file.exefile.tmpMitFiles138.exe

pid process

1804 file.exe
1948 file.tmp
1948 file.tmp
1948 file.tmp
1948 file.tmp
1228 MitFiles138.exe
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

pid	process
1948	file.tmp
1228	MitFiles138.exe
1708	eZRtyfAm28.exe

pid	process
1804	file.exe
1948	file.tmp
1948	file.tmp
1948	file.tmp
1948	file.tmp
1228	MitFiles138.exe

Drops file in Program Files directory 17 IoCs

Processes:

file.tmp

description	ioc	process
File created	C:\Program Files (x86)\Mit Files\is-T04B0.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-QEBM8.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-U0747.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-N9GLC.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-TK692.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Mit Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Mit Files\unins000.dat	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-9G768.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-OE67C.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-1EVF4.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-J51VK.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-OCH5C.tmp	file.tmp
File opened for modification	C:\Program Files (x86)\Mit Files\MitFiles138.exe	file.tmp
File created	C:\Program Files (x86)\Mit Files\is-EBD6G.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-QM1TM.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-2LJL3.tmp	file.tmp
File created	C:\Program Files (x86)\Mit Files\language\is-3108U.tmp	file.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

Processes:

taskkill.exe

pid process

1844 taskkill.exe
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

MitFiles138.exe

pid process

1228 MitFiles138.exe
1228 MitFiles138.exe
1228 MitFiles138.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

taskkill.exe

description pid process

Token: SeDebugPrivilege 1844 taskkill.exe

pid	process
1844	taskkill.exe

pid	process
1228	MitFiles138.exe
1228	MitFiles138.exe
1228	MitFiles138.exe

description	pid	process
Token: SeDebugPrivilege	1844	taskkill.exe

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

file.exefile.tmpMitFiles138.execmd.exe

description	pid	process	target process
PID 1804 wrote to memory of 1948	1804	file.exe	file.tmp
PID 1804 wrote to memory of 1948	1804	file.exe	file.tmp
PID 1804 wrote to memory of 1948	1804	file.exe	file.tmp
PID 1804 wrote to memory of 1948	1804	file.exe	file.tmp
PID 1804 wrote to memory of 1948	1804	file.exe	file.tmp
PID 1804 wrote to memory of 1948	1804	file.exe	file.tmp
PID 1804 wrote to memory of 1948	1804	file.exe	file.tmp
PID 1948 wrote to memory of 1228	1948	file.tmp	MitFiles138.exe
PID 1948 wrote to memory of 1228	1948	file.tmp	MitFiles138.exe
PID 1948 wrote to memory of 1228	1948	file.tmp	MitFiles138.exe
PID 1948 wrote to memory of 1228	1948	file.tmp	MitFiles138.exe
PID 1228 wrote to memory of 1708	1228	MitFiles138.exe	eZRtyfAm28.exe
PID 1228 wrote to memory of 1708	1228	MitFiles138.exe	eZRtyfAm28.exe
PID 1228 wrote to memory of 1708	1228	MitFiles138.exe	eZRtyfAm28.exe
PID 1228 wrote to memory of 1708	1228	MitFiles138.exe	eZRtyfAm28.exe
PID 1228 wrote to memory of 320	1228	MitFiles138.exe	cmd.exe
PID 1228 wrote to memory of 320	1228	MitFiles138.exe	cmd.exe
PID 1228 wrote to memory of 320	1228	MitFiles138.exe	cmd.exe
PID 1228 wrote to memory of 320	1228	MitFiles138.exe	cmd.exe
PID 320 wrote to memory of 1844	320	cmd.exe	taskkill.exe
PID 320 wrote to memory of 1844	320	cmd.exe	taskkill.exe
PID 320 wrote to memory of 1844	320	cmd.exe	taskkill.exe
PID 320 wrote to memory of 1844	320	cmd.exe	taskkill.exe

C:\Users\Admin\AppData\Local\Temp\file.exe
"C:\Users\Admin\AppData\Local\Temp\file.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1804
- C:\Users\Admin\AppData\Local\Temp\is-0EIL7.tmp\file.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-0EIL7.tmp\file.tmp" /SL5="$60126,1519873,483328,C:\Users\Admin\AppData\Local\Temp\file.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  PID:1948
- - C:\Program Files (x86)\Mit Files\MitFiles138.exe
    "C:\Program Files (x86)\Mit Files\MitFiles138.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1228
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eZRtyfAm28.exe
      4⤵
      Executes dropped EXE
      PID:1708
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "MitFiles138.exe" /f & erase "C:\Program Files (x86)\Mit Files\MitFiles138.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:320
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "MitFiles138.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1844

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Program Files (x86)\Mit Files\MitFiles138.exe

Filesize
2.0MB

MD5
cd5d23e5b7fc98001a97faed1a4cd4ff

SHA1
bc2fda1027b70f57cd664faba4f8e48778957fb4

SHA256
bfcf6b0a354f85fac13f5030e192122e907cfd2da4784d6a109904808d91e4b0

SHA512
927a2f8e756211aa2a8ff72c004ace34f7725c50e13c4161b7624a685dcc72b5ede6c5cee68755db8415a7a362e377169e72518ed6aa9a6687dd431aaabf4890

Download Submit
C:\Program Files (x86)\Mit Files\MitFiles138.exe

Filesize
2.0MB

MD5
cd5d23e5b7fc98001a97faed1a4cd4ff

SHA1
bc2fda1027b70f57cd664faba4f8e48778957fb4

SHA256
bfcf6b0a354f85fac13f5030e192122e907cfd2da4784d6a109904808d91e4b0

SHA512
927a2f8e756211aa2a8ff72c004ace34f7725c50e13c4161b7624a685dcc72b5ede6c5cee68755db8415a7a362e377169e72518ed6aa9a6687dd431aaabf4890

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-0EIL7.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-0EIL7.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eZRtyfAm28.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\Mit Files\MitFiles138.exe

Filesize
2.0MB

MD5
cd5d23e5b7fc98001a97faed1a4cd4ff

SHA1
bc2fda1027b70f57cd664faba4f8e48778957fb4

SHA256
bfcf6b0a354f85fac13f5030e192122e907cfd2da4784d6a109904808d91e4b0

SHA512
927a2f8e756211aa2a8ff72c004ace34f7725c50e13c4161b7624a685dcc72b5ede6c5cee68755db8415a7a362e377169e72518ed6aa9a6687dd431aaabf4890

Download Submit
\Users\Admin\AppData\Local\Temp\is-0EIL7.tmp\file.tmp

Filesize
695KB

MD5
415533bb40980951c966665cff9e2fe7

SHA1
fce396c8fa01876dd008f22c8be9a9b706f4aaec

SHA256
f688364bb17f03e53de641e7a0b0efefe30ac155fa9fa414a2150204ed9d3734

SHA512
3a8f88fa83e9f8be96fc9a0e8b47536455f50b1c511210d98fa178444b1e5ad1943cc3000e869f6dba4c782b48a3538d0b52d5e29ce3a692636aefc0e52083ae

Download Submit
\Users\Admin\AppData\Local\Temp\is-8Q2VC.tmp\_isetup\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-8Q2VC.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-8Q2VC.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eZRtyfAm28.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/320-83-0x0000000000000000-mapping.dmp

Download
memory/1228-70-0x0000000000400000-0x00000000013F4000-memory.dmp

Filesize
16.0MB

Download
memory/1228-66-0x0000000000000000-mapping.dmp

Download
memory/1228-85-0x0000000000400000-0x00000000013F4000-memory.dmp

Filesize
16.0MB

Download
memory/1228-71-0x0000000000400000-0x00000000013F4000-memory.dmp

Filesize
16.0MB

Download
memory/1228-73-0x0000000000400000-0x00000000013F4000-memory.dmp

Filesize
16.0MB

Download
memory/1228-82-0x0000000000400000-0x00000000013F4000-memory.dmp

Filesize
16.0MB

Download
memory/1228-77-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1708-75-0x0000000000000000-mapping.dmp

Download
memory/1804-68-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/1804-54-0x00000000762F1000-0x00000000762F3000-memory.dmp

Filesize
8KB

Download
memory/1804-55-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/1804-86-0x0000000000400000-0x000000000047D000-memory.dmp

Filesize
500KB

Download
memory/1844-84-0x0000000000000000-mapping.dmp

Download
memory/1948-69-0x00000000035D0000-0x00000000045C4000-memory.dmp

Filesize
16.0MB

Download
memory/1948-81-0x00000000035D0000-0x00000000045C4000-memory.dmp

Filesize
16.0MB

Download
memory/1948-58-0x0000000000000000-mapping.dmp

Download