nymaim | b248366303d84a892d54d2a3bfcf5a4642c20be9b00bf6402336c295ac18f025

Analysis

max time kernel
147s
max time network
170s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
30-11-2022 23:31

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General

Target

file.exe
Size

2.2MB
MD5

691997b3c6129ff2dba13300f8f6e2c0
SHA1

bdc28d73205b1121b4a25e19b246fe8cb928cc84
SHA256

b248366303d84a892d54d2a3bfcf5a4642c20be9b00bf6402336c295ac18f025
SHA512

38bf8fa7777fd988836ee95559c0453f2412a5508c248d73d6cf17dc705005dd8dd7d85c815bffea733a8844aa514d472b851409da6db148f526c35a7851ff85
SSDEEP

49152:UPAUk702BOllI/o8m1knFJoD981SnplY0K9mc4M89pVQrD6BRxM6FWYEAG5cyS:UPAUk70/lI0kERLY03pV57VF6XcyS

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
1972	is-896DM.tmp
676	PrintFolders.exe
1588	pmrS0l1WX3lGW.exe

Loads dropped DLL 10 IoCs

pid	Process
820	file.exe
1972	is-896DM.tmp
1972	is-896DM.tmp
1972	is-896DM.tmp
1972	is-896DM.tmp
676	PrintFolders.exe
676	PrintFolders.exe
676	PrintFolders.exe
1588	pmrS0l1WX3lGW.exe
1588	pmrS0l1WX3lGW.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\is-I5ERV.tmp	is-896DM.tmp
File created	C:\Program Files (x86)\PrintFolders\is-QJ8BU.tmp	is-896DM.tmp
File created	C:\Program Files (x86)\PrintFolders\is-12TLS.tmp	is-896DM.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\PrintFolders.exe	is-896DM.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-896DM.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-896DM.tmp
File created	C:\Program Files (x86)\PrintFolders\is-PA9NB.tmp	is-896DM.tmp
File created	C:\Program Files (x86)\PrintFolders\is-N4DOB.tmp	is-896DM.tmp
File created	C:\Program Files (x86)\PrintFolders\is-Q0A0D.tmp	is-896DM.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
1208	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
676	PrintFolders.exe
676	PrintFolders.exe
676	PrintFolders.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	1972	is-896DM.tmp
Token: SeBackupPrivilege	1972	is-896DM.tmp
Token: SeDebugPrivilege	1208	taskkill.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 820 wrote to memory of 1972	820	file.exe	28
PID 820 wrote to memory of 1972	820	file.exe	28
PID 820 wrote to memory of 1972	820	file.exe	28
PID 820 wrote to memory of 1972	820	file.exe	28
PID 820 wrote to memory of 1972	820	file.exe	28
PID 820 wrote to memory of 1972	820	file.exe	28
PID 820 wrote to memory of 1972	820	file.exe	28
PID 1972 wrote to memory of 676	1972	is-896DM.tmp	29
PID 1972 wrote to memory of 676	1972	is-896DM.tmp	29
PID 1972 wrote to memory of 676	1972	is-896DM.tmp	29
PID 1972 wrote to memory of 676	1972	is-896DM.tmp	29
PID 1972 wrote to memory of 676	1972	is-896DM.tmp	29
PID 1972 wrote to memory of 676	1972	is-896DM.tmp	29
PID 1972 wrote to memory of 676	1972	is-896DM.tmp	29
PID 676 wrote to memory of 1588	676	PrintFolders.exe	30
PID 676 wrote to memory of 1588	676	PrintFolders.exe	30
PID 676 wrote to memory of 1588	676	PrintFolders.exe	30
PID 676 wrote to memory of 1588	676	PrintFolders.exe	30
PID 676 wrote to memory of 1588	676	PrintFolders.exe	30
PID 676 wrote to memory of 1588	676	PrintFolders.exe	30
PID 676 wrote to memory of 1588	676	PrintFolders.exe	30
PID 676 wrote to memory of 1484	676	PrintFolders.exe	33
PID 676 wrote to memory of 1484	676	PrintFolders.exe	33
PID 676 wrote to memory of 1484	676	PrintFolders.exe	33
PID 676 wrote to memory of 1484	676	PrintFolders.exe	33
PID 676 wrote to memory of 1484	676	PrintFolders.exe	33
PID 676 wrote to memory of 1484	676	PrintFolders.exe	33
PID 676 wrote to memory of 1484	676	PrintFolders.exe	33
PID 1484 wrote to memory of 1208	1484	cmd.exe	35
PID 1484 wrote to memory of 1208	1484	cmd.exe	35
PID 1484 wrote to memory of 1208	1484	cmd.exe	35
PID 1484 wrote to memory of 1208	1484	cmd.exe	35
PID 1484 wrote to memory of 1208	1484	cmd.exe	35
PID 1484 wrote to memory of 1208	1484	cmd.exe	35
PID 1484 wrote to memory of 1208	1484	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:820
- C:\Users\Admin\AppData\Local\Temp\is-6QHM3.tmp\is-896DM.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-6QHM3.tmp\is-896DM.tmp" /SL4 $70120 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2097192 51712
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:1972
- - C:\Program Files (x86)\PrintFolders\PrintFolders.exe
    "C:\Program Files (x86)\PrintFolders\PrintFolders.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:676
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\pmrS0l1WX3lGW.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:1588
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "PrintFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\PrintFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1484
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "PrintFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1208

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\PrintFolders.exe

Filesize
3.3MB

MD5
2dbb4f6cf9c6b97353c5e90fe895f78a

SHA1
384ec2ffe95cfca8978d1393327c5d4e97d8de42

SHA256
8d246719b9b3f9288fb4a435e6fc163becba7113d32c271413b76abc03836e1e

SHA512
af5291b3426eb39a80bb5c47c12a22e734130f613cb3e896eda031732028936ff6638f575d55e3a199244fa0f40eaa45e6cc912b083010a37a94712b044c57d3

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

Filesize
3.3MB

MD5
2dbb4f6cf9c6b97353c5e90fe895f78a

SHA1
384ec2ffe95cfca8978d1393327c5d4e97d8de42

SHA256
8d246719b9b3f9288fb4a435e6fc163becba7113d32c271413b76abc03836e1e

SHA512
af5291b3426eb39a80bb5c47c12a22e734130f613cb3e896eda031732028936ff6638f575d55e3a199244fa0f40eaa45e6cc912b083010a37a94712b044c57d3

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-6QHM3.tmp\is-896DM.tmp

Filesize
643KB

MD5
363a4d2aa5d6cf5cbb2267cccf0c4436

SHA1
a4cdb756698ed28f522956166a6292e9e309dd9c

SHA256
b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

SHA512
b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-6QHM3.tmp\is-896DM.tmp

Filesize
643KB

MD5
363a4d2aa5d6cf5cbb2267cccf0c4436

SHA1
a4cdb756698ed28f522956166a6292e9e309dd9c

SHA256
b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

SHA512
b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\pmrS0l1WX3lGW.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\pmrS0l1WX3lGW.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
3.3MB

MD5
2dbb4f6cf9c6b97353c5e90fe895f78a

SHA1
384ec2ffe95cfca8978d1393327c5d4e97d8de42

SHA256
8d246719b9b3f9288fb4a435e6fc163becba7113d32c271413b76abc03836e1e

SHA512
af5291b3426eb39a80bb5c47c12a22e734130f613cb3e896eda031732028936ff6638f575d55e3a199244fa0f40eaa45e6cc912b083010a37a94712b044c57d3

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

Filesize
3.3MB

MD5
2dbb4f6cf9c6b97353c5e90fe895f78a

SHA1
384ec2ffe95cfca8978d1393327c5d4e97d8de42

SHA256
8d246719b9b3f9288fb4a435e6fc163becba7113d32c271413b76abc03836e1e

SHA512
af5291b3426eb39a80bb5c47c12a22e734130f613cb3e896eda031732028936ff6638f575d55e3a199244fa0f40eaa45e6cc912b083010a37a94712b044c57d3

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

Filesize
3.3MB

MD5
2dbb4f6cf9c6b97353c5e90fe895f78a

SHA1
384ec2ffe95cfca8978d1393327c5d4e97d8de42

SHA256
8d246719b9b3f9288fb4a435e6fc163becba7113d32c271413b76abc03836e1e

SHA512
af5291b3426eb39a80bb5c47c12a22e734130f613cb3e896eda031732028936ff6638f575d55e3a199244fa0f40eaa45e6cc912b083010a37a94712b044c57d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-6QHM3.tmp\is-896DM.tmp

Filesize
643KB

MD5
363a4d2aa5d6cf5cbb2267cccf0c4436

SHA1
a4cdb756698ed28f522956166a6292e9e309dd9c

SHA256
b5cd942dd7019c1cda1715e4ce942094c41ad1e7bc7c5f63fe3ab7d97bc5a021

SHA512
b5929be6e258a63557f376b50a40f6d465cbd372a88e7dcae7944faacb9181cd55873f52dee99cee2e3705596b3b55cb6f784db800f5a32f06e63b9ead3e7c70

Download Submit
\Users\Admin\AppData\Local\Temp\is-B9P79.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-B9P79.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-B9P79.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}\pmrS0l1WX3lGW.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\pmrS0l1WX3lGW.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\pmrS0l1WX3lGW.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/676-75-0x0000000001B80000-0x0000000002CCD000-memory.dmp

Filesize
17.3MB

Download
memory/676-94-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/676-76-0x0000000001B80000-0x0000000002CCD000-memory.dmp

Filesize
17.3MB

Download
memory/676-89-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/676-78-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/676-79-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/676-80-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/676-88-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/676-70-0x0000000000400000-0x000000000154D000-memory.dmp

Filesize
17.3MB

Download
memory/820-55-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/820-65-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/820-54-0x0000000075591000-0x0000000075593000-memory.dmp

Filesize
8KB

Download
memory/820-95-0x0000000000400000-0x0000000000413000-memory.dmp

Filesize
76KB

Download
memory/1972-69-0x0000000003070000-0x00000000041BD000-memory.dmp

Filesize
17.3MB

Download
memory/1972-77-0x0000000003070000-0x00000000041BD000-memory.dmp

Filesize
17.3MB

Download