nymaim | 8fcad352f66331c9c34af3f867fdeafd8f2906162d6ca0ce2685f026622caf1d

Analysis

max time kernel
57s
max time network
58s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
17-12-2022 18:02

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General

Target

file.exe
Size

2.5MB
MD5

22b3847931d9db6919c4d6fbbaf9e49e
SHA1

e62738c0282f5a9514eedc684ddc405f76a88c34
SHA256

8fcad352f66331c9c34af3f867fdeafd8f2906162d6ca0ce2685f026622caf1d
SHA512

cdb64a5e96d38b3920b56120b0a40894cb44f510da3d047820264819e75e05380d566a62479446b31a8689ea60dba5d87331890333db5c7450b60f33c41f4899
SSDEEP

49152:NfbaDUwBssrtVHe4CIXcbV4w+Eq9kDoc3XhoSbQ2ZD2grBVjCLA2:Nj0UwBsd4xXcbl+EKshoS02rm

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
2032	is-69OM5.tmp
1068	obFolders.exe
684	eH176W6A6.exe

Loads dropped DLL 10 IoCs

pid	Process
1204	file.exe
2032	is-69OM5.tmp
2032	is-69OM5.tmp
2032	is-69OM5.tmp
2032	is-69OM5.tmp
1068	obFolders.exe
1068	obFolders.exe
1068	obFolders.exe
684	eH176W6A6.exe
684	eH176W6A6.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-ABCSN.tmp	is-69OM5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-FQRCJ.tmp	is-69OM5.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\unins000.dat	is-69OM5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-8IBJG.tmp	is-69OM5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-4ELQ4.tmp	is-69OM5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-NOK6G.tmp	is-69OM5.tmp
File created	C:\Program Files (x86)\PrintFolders\is-UEK4V.tmp	is-69OM5.tmp
File opened for modification	C:\Program Files (x86)\PrintFolders\obFolders.exe	is-69OM5.tmp
File created	C:\Program Files (x86)\PrintFolders\unins000.dat	is-69OM5.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
620	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
1068	obFolders.exe
1068	obFolders.exe
1068	obFolders.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeRestorePrivilege	2032	is-69OM5.tmp
Token: SeBackupPrivilege	2032	is-69OM5.tmp
Token: SeDebugPrivilege	620	taskkill.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1204 wrote to memory of 2032	1204	file.exe	28
PID 1204 wrote to memory of 2032	1204	file.exe	28
PID 1204 wrote to memory of 2032	1204	file.exe	28
PID 1204 wrote to memory of 2032	1204	file.exe	28
PID 1204 wrote to memory of 2032	1204	file.exe	28
PID 1204 wrote to memory of 2032	1204	file.exe	28
PID 1204 wrote to memory of 2032	1204	file.exe	28
PID 2032 wrote to memory of 1068	2032	is-69OM5.tmp	29
PID 2032 wrote to memory of 1068	2032	is-69OM5.tmp	29
PID 2032 wrote to memory of 1068	2032	is-69OM5.tmp	29
PID 2032 wrote to memory of 1068	2032	is-69OM5.tmp	29
PID 2032 wrote to memory of 1068	2032	is-69OM5.tmp	29
PID 2032 wrote to memory of 1068	2032	is-69OM5.tmp	29
PID 2032 wrote to memory of 1068	2032	is-69OM5.tmp	29
PID 1068 wrote to memory of 684	1068	obFolders.exe	30
PID 1068 wrote to memory of 684	1068	obFolders.exe	30
PID 1068 wrote to memory of 684	1068	obFolders.exe	30
PID 1068 wrote to memory of 684	1068	obFolders.exe	30
PID 1068 wrote to memory of 684	1068	obFolders.exe	30
PID 1068 wrote to memory of 684	1068	obFolders.exe	30
PID 1068 wrote to memory of 684	1068	obFolders.exe	30
PID 1068 wrote to memory of 1596	1068	obFolders.exe	33
PID 1068 wrote to memory of 1596	1068	obFolders.exe	33
PID 1068 wrote to memory of 1596	1068	obFolders.exe	33
PID 1068 wrote to memory of 1596	1068	obFolders.exe	33
PID 1068 wrote to memory of 1596	1068	obFolders.exe	33
PID 1068 wrote to memory of 1596	1068	obFolders.exe	33
PID 1068 wrote to memory of 1596	1068	obFolders.exe	33
PID 1596 wrote to memory of 620	1596	cmd.exe	35
PID 1596 wrote to memory of 620	1596	cmd.exe	35
PID 1596 wrote to memory of 620	1596	cmd.exe	35
PID 1596 wrote to memory of 620	1596	cmd.exe	35
PID 1596 wrote to memory of 620	1596	cmd.exe	35
PID 1596 wrote to memory of 620	1596	cmd.exe	35
PID 1596 wrote to memory of 620	1596	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:1204
- C:\Users\Admin\AppData\Local\Temp\is-3AO93.tmp\is-69OM5.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-3AO93.tmp\is-69OM5.tmp" /SL4 $70122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 2313668 169472
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2032
- - C:\Program Files (x86)\PrintFolders\obFolders.exe
    "C:\Program Files (x86)\PrintFolders\obFolders.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:1068
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eH176W6A6.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:684
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "obFolders.exe" /f & erase "C:\Program Files (x86)\PrintFolders\obFolders.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:1596
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "obFolders.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:620

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\obFolders.exe

Filesize
3.7MB

MD5
d55dc983bdece739c3e946ab539ced0f

SHA1
ca58fe9337aa0f05da9f2762f72c9aea8f232759

SHA256
05a92d47de03ea4205334f6269085e3ed36c91f70c396b12e19fa467b3d4ebdf

SHA512
5ad055bc1e8444d33240efb5ea617332164cb4f7a6e3b84ae079318ef22937880fad92d79766fc04e7300f287e5f784c3191e7c932d67b64ef7c091ac5d681e4

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

Filesize
3.7MB

MD5
d55dc983bdece739c3e946ab539ced0f

SHA1
ca58fe9337aa0f05da9f2762f72c9aea8f232759

SHA256
05a92d47de03ea4205334f6269085e3ed36c91f70c396b12e19fa467b3d4ebdf

SHA512
5ad055bc1e8444d33240efb5ea617332164cb4f7a6e3b84ae079318ef22937880fad92d79766fc04e7300f287e5f784c3191e7c932d67b64ef7c091ac5d681e4

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-3AO93.tmp\is-69OM5.tmp

Filesize
759KB

MD5
0dc8826072fc99382be7db6ae5929aff

SHA1
7ca23e146bf9bde712b27e400de3243e6bd0a357

SHA256
11ec35b1fea3160e892f0875034a2f18cf0d8d8874ac611b5a7e0f0ace2667ec

SHA512
08db35c065b9b8f740242587f35a3c0ba772993d8132589fe26bafa9bab31d6c5aecae62490a22e135d64ce6b54c26e553534e5d9d6e01d6be8472f471bdf442

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-3AO93.tmp\is-69OM5.tmp

Filesize
759KB

MD5
0dc8826072fc99382be7db6ae5929aff

SHA1
7ca23e146bf9bde712b27e400de3243e6bd0a357

SHA256
11ec35b1fea3160e892f0875034a2f18cf0d8d8874ac611b5a7e0f0ace2667ec

SHA512
08db35c065b9b8f740242587f35a3c0ba772993d8132589fe26bafa9bab31d6c5aecae62490a22e135d64ce6b54c26e553534e5d9d6e01d6be8472f471bdf442

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eH176W6A6.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eH176W6A6.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

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

Filesize
3.7MB

MD5
d55dc983bdece739c3e946ab539ced0f

SHA1
ca58fe9337aa0f05da9f2762f72c9aea8f232759

SHA256
05a92d47de03ea4205334f6269085e3ed36c91f70c396b12e19fa467b3d4ebdf

SHA512
5ad055bc1e8444d33240efb5ea617332164cb4f7a6e3b84ae079318ef22937880fad92d79766fc04e7300f287e5f784c3191e7c932d67b64ef7c091ac5d681e4

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

Filesize
3.7MB

MD5
d55dc983bdece739c3e946ab539ced0f

SHA1
ca58fe9337aa0f05da9f2762f72c9aea8f232759

SHA256
05a92d47de03ea4205334f6269085e3ed36c91f70c396b12e19fa467b3d4ebdf

SHA512
5ad055bc1e8444d33240efb5ea617332164cb4f7a6e3b84ae079318ef22937880fad92d79766fc04e7300f287e5f784c3191e7c932d67b64ef7c091ac5d681e4

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

Filesize
3.7MB

MD5
d55dc983bdece739c3e946ab539ced0f

SHA1
ca58fe9337aa0f05da9f2762f72c9aea8f232759

SHA256
05a92d47de03ea4205334f6269085e3ed36c91f70c396b12e19fa467b3d4ebdf

SHA512
5ad055bc1e8444d33240efb5ea617332164cb4f7a6e3b84ae079318ef22937880fad92d79766fc04e7300f287e5f784c3191e7c932d67b64ef7c091ac5d681e4

Download Submit
\Users\Admin\AppData\Local\Temp\is-3AO93.tmp\is-69OM5.tmp

Filesize
759KB

MD5
0dc8826072fc99382be7db6ae5929aff

SHA1
7ca23e146bf9bde712b27e400de3243e6bd0a357

SHA256
11ec35b1fea3160e892f0875034a2f18cf0d8d8874ac611b5a7e0f0ace2667ec

SHA512
08db35c065b9b8f740242587f35a3c0ba772993d8132589fe26bafa9bab31d6c5aecae62490a22e135d64ce6b54c26e553534e5d9d6e01d6be8472f471bdf442

Download Submit
\Users\Admin\AppData\Local\Temp\is-FIHC7.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-FIHC7.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-FIHC7.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}\eH176W6A6.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eH176W6A6.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\eH176W6A6.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/620-96-0x0000000000000000-mapping.dmp

Download
memory/684-80-0x0000000000000000-mapping.dmp

Download
memory/1068-88-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/1068-92-0x0000000000400000-0x00000000015B9000-memory.dmp

Filesize
17.7MB

Download
memory/1068-77-0x0000000000400000-0x00000000015B9000-memory.dmp

Filesize
17.7MB

Download
memory/1068-78-0x0000000000400000-0x00000000015B9000-memory.dmp

Filesize
17.7MB

Download
memory/1068-66-0x0000000000000000-mapping.dmp

Download
memory/1068-75-0x0000000001ED0000-0x0000000003089000-memory.dmp

Filesize
17.7MB

Download
memory/1068-95-0x0000000000400000-0x00000000015B9000-memory.dmp

Filesize
17.7MB

Download
memory/1068-76-0x0000000001ED0000-0x0000000003089000-memory.dmp

Filesize
17.7MB

Download
memory/1068-74-0x0000000000400000-0x00000000015B9000-memory.dmp

Filesize
17.7MB

Download
memory/1068-87-0x0000000000400000-0x00000000015B9000-memory.dmp

Filesize
17.7MB

Download
memory/1204-54-0x0000000076391000-0x0000000076393000-memory.dmp

Filesize
8KB

Download
memory/1204-68-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1204-55-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1204-97-0x0000000000400000-0x0000000000430000-memory.dmp

Filesize
192KB

Download
memory/1596-93-0x0000000000000000-mapping.dmp

Download
memory/2032-86-0x0000000003080000-0x0000000004239000-memory.dmp

Filesize
17.7MB

Download
memory/2032-58-0x0000000000000000-mapping.dmp

Download
memory/2032-73-0x0000000003080000-0x0000000004239000-memory.dmp

Filesize
17.7MB

Download