nymaim | b3d6dae504af6b5fe4d96e770da762b68b106657114be82f28422966a54362be

Analysis

max time kernel
57s
max time network
60s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
16/12/2022, 03:31

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General

Target

file.exe
Size

2.5MB
MD5

d0d8367178759176a21e72dd085e8c6a
SHA1

527197ed4ca2c9a5be5c6f4fa55c8299d63b2a43
SHA256

b3d6dae504af6b5fe4d96e770da762b68b106657114be82f28422966a54362be
SHA512

4a90881debdee12879778640cd33c0d26df11dbc0d2a056ab9ab14e54ededf84f1580d3ec10a57f0c5def8f7791e73236a948bf78e02079d0bb40582cba9ada0
SSDEEP

49152:MpKmX2RuFaD62ho5+Vqcf2NqQSOrOtqCEIUYMSeOCgSY/imn:MpK3MYDw5+VqjNqkyjEGcY/imn

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

pid	Process
832	is-RSAA7.tmp
1636	oaFolders.exe
1224	QwZ0jN.exe

Loads dropped DLL 10 IoCs

pid	Process
1292	file.exe
832	is-RSAA7.tmp
832	is-RSAA7.tmp
832	is-RSAA7.tmp
832	is-RSAA7.tmp
1636	oaFolders.exe
1636	oaFolders.exe
1636	oaFolders.exe
1224	QwZ0jN.exe
1224	QwZ0jN.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

Drops file in Program Files directory 9 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-RSAA7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-T2V25.tmp	is-RSAA7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-1MMLT.tmp	is-RSAA7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-UF2GL.tmp	is-RSAA7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-ERRHG.tmp	is-RSAA7.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\oaFolders.exe	is-RSAA7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-LC6DV.tmp	is-RSAA7.tmp
File created	C:\Program Files (x86)\PrintFolders\is-9ITGH.tmp	is-RSAA7.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-RSAA7.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
1300	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1636	oaFolders.exe
1636	oaFolders.exe
1636	oaFolders.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1300	taskkill.exe
Token: SeRestorePrivilege	832	is-RSAA7.tmp
Token: SeBackupPrivilege	832	is-RSAA7.tmp

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1292 wrote to memory of 832	1292	file.exe	28
PID 1292 wrote to memory of 832	1292	file.exe	28
PID 1292 wrote to memory of 832	1292	file.exe	28
PID 1292 wrote to memory of 832	1292	file.exe	28
PID 1292 wrote to memory of 832	1292	file.exe	28
PID 1292 wrote to memory of 832	1292	file.exe	28
PID 1292 wrote to memory of 832	1292	file.exe	28
PID 832 wrote to memory of 1636	832	is-RSAA7.tmp	29
PID 832 wrote to memory of 1636	832	is-RSAA7.tmp	29
PID 832 wrote to memory of 1636	832	is-RSAA7.tmp	29
PID 832 wrote to memory of 1636	832	is-RSAA7.tmp	29
PID 832 wrote to memory of 1636	832	is-RSAA7.tmp	29
PID 832 wrote to memory of 1636	832	is-RSAA7.tmp	29
PID 832 wrote to memory of 1636	832	is-RSAA7.tmp	29
PID 1636 wrote to memory of 1224	1636	oaFolders.exe	30
PID 1636 wrote to memory of 1224	1636	oaFolders.exe	30
PID 1636 wrote to memory of 1224	1636	oaFolders.exe	30
PID 1636 wrote to memory of 1224	1636	oaFolders.exe	30
PID 1636 wrote to memory of 1224	1636	oaFolders.exe	30
PID 1636 wrote to memory of 1224	1636	oaFolders.exe	30
PID 1636 wrote to memory of 1224	1636	oaFolders.exe	30
PID 1636 wrote to memory of 1968	1636	oaFolders.exe	33
PID 1636 wrote to memory of 1968	1636	oaFolders.exe	33
PID 1636 wrote to memory of 1968	1636	oaFolders.exe	33
PID 1636 wrote to memory of 1968	1636	oaFolders.exe	33
PID 1636 wrote to memory of 1968	1636	oaFolders.exe	33
PID 1636 wrote to memory of 1968	1636	oaFolders.exe	33
PID 1636 wrote to memory of 1968	1636	oaFolders.exe	33
PID 1968 wrote to memory of 1300	1968	cmd.exe	35
PID 1968 wrote to memory of 1300	1968	cmd.exe	35
PID 1968 wrote to memory of 1300	1968	cmd.exe	35
PID 1968 wrote to memory of 1300	1968	cmd.exe	35
PID 1968 wrote to memory of 1300	1968	cmd.exe	35
PID 1968 wrote to memory of 1300	1968	cmd.exe	35
PID 1968 wrote to memory of 1300	1968	cmd.exe	35

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:1292
- C:\Users\Admin\AppData\Local\Temp\is-9S3M0.tmp\is-RSAA7.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-9S3M0.tmp\is-RSAA7.tmp" /SL4 $7012C "C:\Users\Admin\AppData\Local\Temp\file.exe" 2294080 208896
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:832
- - C:\Program Files (x86)\PrintFolders\oaFolders.exe
    "C:\Program Files (x86)\PrintFolders\oaFolders.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1636
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\QwZ0jN.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:1224
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "oaFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\oaFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1968
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "oaFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1300

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)\PrintFolders\oaFolders.exe

Filesize
3.6MB

MD5
6c10e8beb1104ea5231aea12e91295b1

SHA1
7c309f52d2c339628fbebd200090e264cfc37d35

SHA256
de67bd0fcdd779fc50174595f0c16546130dc8fd46fdd3627110af46a6f39362

SHA512
e9653c2a6f65c7424169c90a07943b9f7cb9e1b1974820c8c0ecd482af4622f50481b4dbe31aeac792d1eb01bba20b01c5a10362d0b3d00617cc11ba7bb28297

Download Submit
C:\Program Files (x86)\PrintFolders\oaFolders.exe

Filesize
3.6MB

MD5
6c10e8beb1104ea5231aea12e91295b1

SHA1
7c309f52d2c339628fbebd200090e264cfc37d35

SHA256
de67bd0fcdd779fc50174595f0c16546130dc8fd46fdd3627110af46a6f39362

SHA512
e9653c2a6f65c7424169c90a07943b9f7cb9e1b1974820c8c0ecd482af4622f50481b4dbe31aeac792d1eb01bba20b01c5a10362d0b3d00617cc11ba7bb28297

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-9S3M0.tmp\is-RSAA7.tmp

Filesize
797KB

MD5
33067bd40abffd83261cc0aff0298b85

SHA1
f492c02df1ef097c24d2e93d3a80fa521e3d767e

SHA256
d0df1c119b09c7d2d6973428d794379d2366077185206e4787d76a0c35267d96

SHA512
89b014df03a157b565009e96ec9a4520fc12412404ed5420b5a540bb5aca6a60352996c91e5b81c235f93dd1a5412fb79a84b30038913f103a78249384e8f648

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-9S3M0.tmp\is-RSAA7.tmp

Filesize
797KB

MD5
33067bd40abffd83261cc0aff0298b85

SHA1
f492c02df1ef097c24d2e93d3a80fa521e3d767e

SHA256
d0df1c119b09c7d2d6973428d794379d2366077185206e4787d76a0c35267d96

SHA512
89b014df03a157b565009e96ec9a4520fc12412404ed5420b5a540bb5aca6a60352996c91e5b81c235f93dd1a5412fb79a84b30038913f103a78249384e8f648

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\QwZ0jN.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\QwZ0jN.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\PrintFolders\oaFolders.exe

Filesize
3.6MB

MD5
6c10e8beb1104ea5231aea12e91295b1

SHA1
7c309f52d2c339628fbebd200090e264cfc37d35

SHA256
de67bd0fcdd779fc50174595f0c16546130dc8fd46fdd3627110af46a6f39362

SHA512
e9653c2a6f65c7424169c90a07943b9f7cb9e1b1974820c8c0ecd482af4622f50481b4dbe31aeac792d1eb01bba20b01c5a10362d0b3d00617cc11ba7bb28297

Download Submit
\Program Files (x86)\PrintFolders\oaFolders.exe

Filesize
3.6MB

MD5
6c10e8beb1104ea5231aea12e91295b1

SHA1
7c309f52d2c339628fbebd200090e264cfc37d35

SHA256
de67bd0fcdd779fc50174595f0c16546130dc8fd46fdd3627110af46a6f39362

SHA512
e9653c2a6f65c7424169c90a07943b9f7cb9e1b1974820c8c0ecd482af4622f50481b4dbe31aeac792d1eb01bba20b01c5a10362d0b3d00617cc11ba7bb28297

Download Submit
\Program Files (x86)\PrintFolders\oaFolders.exe

Filesize
3.6MB

MD5
6c10e8beb1104ea5231aea12e91295b1

SHA1
7c309f52d2c339628fbebd200090e264cfc37d35

SHA256
de67bd0fcdd779fc50174595f0c16546130dc8fd46fdd3627110af46a6f39362

SHA512
e9653c2a6f65c7424169c90a07943b9f7cb9e1b1974820c8c0ecd482af4622f50481b4dbe31aeac792d1eb01bba20b01c5a10362d0b3d00617cc11ba7bb28297

Download Submit
\Users\Admin\AppData\Local\Temp\is-9S3M0.tmp\is-RSAA7.tmp

Filesize
797KB

MD5
33067bd40abffd83261cc0aff0298b85

SHA1
f492c02df1ef097c24d2e93d3a80fa521e3d767e

SHA256
d0df1c119b09c7d2d6973428d794379d2366077185206e4787d76a0c35267d96

SHA512
89b014df03a157b565009e96ec9a4520fc12412404ed5420b5a540bb5aca6a60352996c91e5b81c235f93dd1a5412fb79a84b30038913f103a78249384e8f648

Download Submit
\Users\Admin\AppData\Local\Temp\is-QH6I8.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-QH6I8.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-QH6I8.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}\QwZ0jN.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\QwZ0jN.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\QwZ0jN.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/832-73-0x0000000002FE0000-0x0000000004180000-memory.dmp

Filesize
17.6MB

Download
memory/1292-97-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/1292-55-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/1292-54-0x0000000074FD1000-0x0000000074FD3000-memory.dmp

Filesize
8KB

Download
memory/1292-65-0x0000000000400000-0x0000000000439000-memory.dmp

Filesize
228KB

Download
memory/1636-74-0x0000000000400000-0x00000000015A0000-memory.dmp

Filesize
17.6MB

Download
memory/1636-78-0x0000000000400000-0x00000000015A0000-memory.dmp

Filesize
17.6MB

Download
memory/1636-77-0x0000000000400000-0x00000000015A0000-memory.dmp

Filesize
17.6MB

Download
memory/1636-76-0x0000000001B70000-0x0000000002D10000-memory.dmp

Filesize
17.6MB

Download
memory/1636-86-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1636-90-0x0000000000400000-0x00000000015A0000-memory.dmp

Filesize
17.6MB

Download
memory/1636-91-0x0000000000400000-0x00000000015A0000-memory.dmp

Filesize
17.6MB

Download
memory/1636-75-0x0000000001B70000-0x0000000002D10000-memory.dmp

Filesize
17.6MB

Download
memory/1636-96-0x0000000000400000-0x00000000015A0000-memory.dmp

Filesize
17.6MB

Download