nymaim | 816021710d4240c93cf845c4067774b0d09d1a0db9954893816565576d963036

Analysis

max time kernel
97s
max time network
99s
platform
windows7_x64
resource
win7-20221111-en
resource tags

arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
submitted
23/12/2022, 00:33

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General

Target

file.exe
Size

1.8MB
MD5

c654fd651253fb5668288762600fcc75
SHA1

0750f5a521f88dc44d9d95b4867bb8c347e23c86
SHA256

816021710d4240c93cf845c4067774b0d09d1a0db9954893816565576d963036
SHA512

be2fd70e16ef4a1accafd2739427556ac1375de9de7e8d4cca5fd734bad467c932da95219b27bbc99c85c0a2281d9ba05206e0fb9628b409796927a11a3b6505
SSDEEP

49152:vpPFDZDiORd+N02U5LZ+9BOimObbxvXioUjx/tWP7p3e:vpPFAOqO3kEEUhtGde

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
956	is-TD4H4.tmp
704	SplitFiles117.exe
1508	387fQ86ZsT5ij.exe

Loads dropped DLL 10 IoCs

pid	Process
1820	file.exe
956	is-TD4H4.tmp
956	is-TD4H4.tmp
956	is-TD4H4.tmp
956	is-TD4H4.tmp
704	SplitFiles117.exe
704	SplitFiles117.exe
704	SplitFiles117.exe
1508	387fQ86ZsT5ij.exe
1508	387fQ86ZsT5ij.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 17 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\Split Files\language\is-JAHTG.tmp	is-TD4H4.tmp
File created	C:\Program Files (x86)\Split Files\language\is-CLM5D.tmp	is-TD4H4.tmp
File created	C:\Program Files (x86)\Split Files\is-7DH8H.tmp	is-TD4H4.tmp
File created	C:\Program Files (x86)\Split Files\language\is-AJVF9.tmp	is-TD4H4.tmp
File created	C:\Program Files (x86)\Split Files\language\is-IBCQT.tmp	is-TD4H4.tmp
File created	C:\Program Files (x86)\Split Files\language\is-5ECG8.tmp	is-TD4H4.tmp
File created	C:\Program Files (x86)\Split Files\is-IFK6B.tmp	is-TD4H4.tmp
File created	C:\Program Files (x86)\Split Files\is-KEDTN.tmp	is-TD4H4.tmp
File created	C:\Program Files (x86)\Split Files\language\is-67MIQ.tmp	is-TD4H4.tmp
File opened for modification	C:\Program Files (x86)\Split Files\unins000.dat	is-TD4H4.tmp
File opened for modification	C:\Program Files (x86)\Split Files\SplitFiles117.exe	is-TD4H4.tmp
File created	C:\Program Files (x86)\Split Files\unins000.dat	is-TD4H4.tmp
File created	C:\Program Files (x86)\Split Files\language\is-CBO2Q.tmp	is-TD4H4.tmp
File created	C:\Program Files (x86)\Split Files\is-M6MMC.tmp	is-TD4H4.tmp
File created	C:\Program Files (x86)\Split Files\language\is-UOIP6.tmp	is-TD4H4.tmp
File created	C:\Program Files (x86)\Split Files\language\is-KT1N8.tmp	is-TD4H4.tmp
File created	C:\Program Files (x86)\Split Files\is-DKFIO.tmp	is-TD4H4.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
1928	taskkill.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
704	SplitFiles117.exe
704	SplitFiles117.exe
704	SplitFiles117.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1928	taskkill.exe
Token: SeRestorePrivilege	956	is-TD4H4.tmp
Token: SeBackupPrivilege	956	is-TD4H4.tmp

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 1820 wrote to memory of 956	1820	file.exe	28
PID 1820 wrote to memory of 956	1820	file.exe	28
PID 1820 wrote to memory of 956	1820	file.exe	28
PID 1820 wrote to memory of 956	1820	file.exe	28
PID 1820 wrote to memory of 956	1820	file.exe	28
PID 1820 wrote to memory of 956	1820	file.exe	28
PID 1820 wrote to memory of 956	1820	file.exe	28
PID 956 wrote to memory of 704	956	is-TD4H4.tmp	29
PID 956 wrote to memory of 704	956	is-TD4H4.tmp	29
PID 956 wrote to memory of 704	956	is-TD4H4.tmp	29
PID 956 wrote to memory of 704	956	is-TD4H4.tmp	29
PID 956 wrote to memory of 704	956	is-TD4H4.tmp	29
PID 956 wrote to memory of 704	956	is-TD4H4.tmp	29
PID 956 wrote to memory of 704	956	is-TD4H4.tmp	29
PID 704 wrote to memory of 1508	704	SplitFiles117.exe	30
PID 704 wrote to memory of 1508	704	SplitFiles117.exe	30
PID 704 wrote to memory of 1508	704	SplitFiles117.exe	30
PID 704 wrote to memory of 1508	704	SplitFiles117.exe	30
PID 704 wrote to memory of 1508	704	SplitFiles117.exe	30
PID 704 wrote to memory of 1508	704	SplitFiles117.exe	30
PID 704 wrote to memory of 1508	704	SplitFiles117.exe	30
PID 704 wrote to memory of 748	704	SplitFiles117.exe	33
PID 704 wrote to memory of 748	704	SplitFiles117.exe	33
PID 704 wrote to memory of 748	704	SplitFiles117.exe	33
PID 704 wrote to memory of 748	704	SplitFiles117.exe	33
PID 704 wrote to memory of 748	704	SplitFiles117.exe	33
PID 704 wrote to memory of 748	704	SplitFiles117.exe	33
PID 704 wrote to memory of 748	704	SplitFiles117.exe	33
PID 748 wrote to memory of 1928	748	cmd.exe	35
PID 748 wrote to memory of 1928	748	cmd.exe	35
PID 748 wrote to memory of 1928	748	cmd.exe	35
PID 748 wrote to memory of 1928	748	cmd.exe	35
PID 748 wrote to memory of 1928	748	cmd.exe	35
PID 748 wrote to memory of 1928	748	cmd.exe	35
PID 748 wrote to memory of 1928	748	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:1820
- C:\Users\Admin\AppData\Local\Temp\is-KOTPJ.tmp\is-TD4H4.tmp
  "C:\Users\Admin\AppData\Local\Temp\is-KOTPJ.tmp\is-TD4H4.tmp" /SL4 $80022 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1642989 133120
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:956
- - C:\Program Files (x86)\Split Files\SplitFiles117.exe
    "C:\Program Files (x86)\Split Files\SplitFiles117.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of WriteProcessMemory
    PID:704
  - - C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\387fQ86ZsT5ij.exe
      4⤵
      Executes dropped EXE
      Loads dropped DLL
      PID:1508
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles117.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles117.exe" & exit
      4⤵
      Suspicious use of WriteProcessMemory
      PID:748
    - - C:\Windows\SysWOW64\taskkill.exe
        
        taskkill /im "SplitFiles117.exe" /f
        5⤵
        Kills process with taskkill
        Suspicious use of AdjustPrivilegeToken
        
        PID:1928

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)\Split Files\SplitFiles117.exe

Filesize
3.2MB

MD5
2593b96e42530beff1d72f919da48aa8

SHA1
de16d0bdf55e38b844b2076914becc3cf249f61c

SHA256
bfedcacabf0474f0bf282ea9ae4a2ccb5165bec41644017ff9d04af86fc1e500

SHA512
9c11ce22a96078745eee6cbaaea622bae5eaf22347036bb69ca66fae4030fead3bc447628a49c12026adfb2962c4d0288868f9db66d434280fec811fde924a24

Download Submit
C:\Program Files (x86)\Split Files\SplitFiles117.exe

Filesize
3.2MB

MD5
2593b96e42530beff1d72f919da48aa8

SHA1
de16d0bdf55e38b844b2076914becc3cf249f61c

SHA256
bfedcacabf0474f0bf282ea9ae4a2ccb5165bec41644017ff9d04af86fc1e500

SHA512
9c11ce22a96078745eee6cbaaea622bae5eaf22347036bb69ca66fae4030fead3bc447628a49c12026adfb2962c4d0288868f9db66d434280fec811fde924a24

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-KOTPJ.tmp\is-TD4H4.tmp

Filesize
723KB

MD5
7fd7ec3d32ed2a377fa18e8931475b2e

SHA1
30b386da1750701f78cbf65550f32661d8a4175f

SHA256
0290cf819c841a17d433eb1f768d2bad4ad57db003563a925688b1c86bef5455

SHA512
db2ac34c30b89c2551d9e16de7d748e4a984141c889707a9edd165f328e75260ff6fb8d7383fb7c7fcf10000c08a10af03a50ce7b3665a8e935c0d5d66e59334

Download Submit
C:\Users\Admin\AppData\Local\Temp\is-KOTPJ.tmp\is-TD4H4.tmp

Filesize
723KB

MD5
7fd7ec3d32ed2a377fa18e8931475b2e

SHA1
30b386da1750701f78cbf65550f32661d8a4175f

SHA256
0290cf819c841a17d433eb1f768d2bad4ad57db003563a925688b1c86bef5455

SHA512
db2ac34c30b89c2551d9e16de7d748e4a984141c889707a9edd165f328e75260ff6fb8d7383fb7c7fcf10000c08a10af03a50ce7b3665a8e935c0d5d66e59334

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\387fQ86ZsT5ij.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\387fQ86ZsT5ij.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Program Files (x86)\Split Files\SplitFiles117.exe

Filesize
3.2MB

MD5
2593b96e42530beff1d72f919da48aa8

SHA1
de16d0bdf55e38b844b2076914becc3cf249f61c

SHA256
bfedcacabf0474f0bf282ea9ae4a2ccb5165bec41644017ff9d04af86fc1e500

SHA512
9c11ce22a96078745eee6cbaaea622bae5eaf22347036bb69ca66fae4030fead3bc447628a49c12026adfb2962c4d0288868f9db66d434280fec811fde924a24

Download Submit
\Program Files (x86)\Split Files\SplitFiles117.exe

Filesize
3.2MB

MD5
2593b96e42530beff1d72f919da48aa8

SHA1
de16d0bdf55e38b844b2076914becc3cf249f61c

SHA256
bfedcacabf0474f0bf282ea9ae4a2ccb5165bec41644017ff9d04af86fc1e500

SHA512
9c11ce22a96078745eee6cbaaea622bae5eaf22347036bb69ca66fae4030fead3bc447628a49c12026adfb2962c4d0288868f9db66d434280fec811fde924a24

Download Submit
\Program Files (x86)\Split Files\SplitFiles117.exe

Filesize
3.2MB

MD5
2593b96e42530beff1d72f919da48aa8

SHA1
de16d0bdf55e38b844b2076914becc3cf249f61c

SHA256
bfedcacabf0474f0bf282ea9ae4a2ccb5165bec41644017ff9d04af86fc1e500

SHA512
9c11ce22a96078745eee6cbaaea622bae5eaf22347036bb69ca66fae4030fead3bc447628a49c12026adfb2962c4d0288868f9db66d434280fec811fde924a24

Download Submit
\Users\Admin\AppData\Local\Temp\is-49K5H.tmp\_iscrypt.dll

Filesize
2KB

MD5
a69559718ab506675e907fe49deb71e9

SHA1
bc8f404ffdb1960b50c12ff9413c893b56f2e36f

SHA256
2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

SHA512
e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

Download Submit
\Users\Admin\AppData\Local\Temp\is-49K5H.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-49K5H.tmp\_isetup\_shfoldr.dll

Filesize
22KB

MD5
92dc6ef532fbb4a5c3201469a5b5eb63

SHA1
3e89ff837147c16b4e41c30d6c796374e0b8e62c

SHA256
9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

SHA512
9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

Download Submit
\Users\Admin\AppData\Local\Temp\is-KOTPJ.tmp\is-TD4H4.tmp

Filesize
723KB

MD5
7fd7ec3d32ed2a377fa18e8931475b2e

SHA1
30b386da1750701f78cbf65550f32661d8a4175f

SHA256
0290cf819c841a17d433eb1f768d2bad4ad57db003563a925688b1c86bef5455

SHA512
db2ac34c30b89c2551d9e16de7d748e4a984141c889707a9edd165f328e75260ff6fb8d7383fb7c7fcf10000c08a10af03a50ce7b3665a8e935c0d5d66e59334

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\387fQ86ZsT5ij.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\387fQ86ZsT5ij.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\387fQ86ZsT5ij.exe

Filesize
72KB

MD5
3fb36cb0b7172e5298d2992d42984d06

SHA1
439827777df4a337cbb9fa4a4640d0d3fa1738b7

SHA256
27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

SHA512
6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

Download Submit
memory/704-78-0x0000000000400000-0x0000000001530000-memory.dmp

Filesize
17.2MB

Download
memory/704-75-0x0000000001BC0000-0x0000000002CF0000-memory.dmp

Filesize
17.2MB

Download
memory/704-76-0x0000000001BC0000-0x0000000002CF0000-memory.dmp

Filesize
17.2MB

Download
memory/704-77-0x0000000000400000-0x0000000001530000-memory.dmp

Filesize
17.2MB

Download
memory/704-95-0x0000000000400000-0x0000000001530000-memory.dmp

Filesize
17.2MB

Download
memory/704-88-0x0000000010000000-0x000000001001B000-memory.dmp

Filesize
108KB

Download
memory/704-87-0x0000000000400000-0x0000000001530000-memory.dmp

Filesize
17.2MB

Download
memory/704-74-0x0000000000400000-0x0000000001530000-memory.dmp

Filesize
17.2MB

Download
memory/956-73-0x0000000003770000-0x00000000048A0000-memory.dmp

Filesize
17.2MB

Download
memory/956-86-0x0000000003770000-0x00000000048A0000-memory.dmp

Filesize
17.2MB

Download
memory/1820-54-0x00000000760A1000-0x00000000760A3000-memory.dmp

Filesize
8KB

Download
memory/1820-72-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1820-55-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download
memory/1820-97-0x0000000000400000-0x0000000000427000-memory.dmp

Filesize
156KB

Download